Abstract

The invention discloses an R-T-B magnet and a preparation method thereof. The R-T-B magnet comprises the following components of: ≥30.0 wt % of R, wherein R is a rare earth element; 0.1-0.3 wt % of Nb; 0.955-1.2 wt % of B; 58-69 wt % of Fe, wherein wt % is a percentage of the mass of respective component to the total mass of all components; the R-T-B magnet further comprises Co and Ti; and in the R-T-B magnet, the ratio of the mass content of Co to the total mass content of “the Nb and the Ti” is 4-10. The present invention further optimizes the coordination relationship among the components in the R-T-B magnet, which can prepare a magnet material with relatively high levels of magnetic properties such as remanence, coercivity, squareness and the like.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B

Abstract

Disclosed are a neodymium-iron-boron magnet material, a preparation therefor, and an application thereof. The neodymium-iron-boron magnet material comprises the following components in weight percent: R: 28.00-32.00 wt. %, the R being a rare earth element, Al: 0.00-1.00 wt. %, Cu: 0.12-0.50 wt. %, B: 0.85-1.10 wt. %, and the balance being Fe; wt. % indicates the weight percent in the neodymium-iron-boron magnet material; the ratio of the volume of a Nd-O phase having an FCC-type crystal structure in an intergranular triangular region of the neodymium-iron-boron magnet material to the volume of a grain boundary phase of the neodymium-iron-boron magnet material is within 20%. According to the present invention, by reducing the proportion of the Nd-O phase having an FCC-type crystal structure, the demagnetization coupling capability of the grain boundary phase is enhanced, and the consistency of intrinsic coercive force of a magnet is improved.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B

Abstract

Disclosed in the present invention are a neodymium-iron-boron magnet material and a preparation method therefor and an application thereof. The neodymium-iron-boron magnet material of the present invention comprises a nanocrystalline Cu-rich phase located in an intergranular triangular area, the element composition of the nanocrystalline Cu-rich phase and the atomic ratio of the nanocrystalline Cu-rich phase being Tm:Re:Cu:Ga=(1-20):(20-55):(25-70):(1-15), and the volume ratio of the nanocrystalline Cu-rich phase to the intergranular triangular area being 4-12%, wherein Tm comprises Fe and/or Co, and Re is a rare earth element. According to the neodymium-iron-boron magnet material of the present invention, the intrinsic coercive force can be improved when heavy rare earth is not used or rarely used, the cost is reduced, and meanwhile, relatively high residual magnetism, magnetic energy product and squareness performance are kept.

IPC Classes  ?

• H01F 1/053 - Alloys characterised by their composition containing rare earth metals
• C22C 38/16 - Ferrous alloys, e.g. steel alloys containing copper

Abstract

Disclosed in the present invention are a neodymium-iron-boron magnet material and a preparation method therefor and the use thereof, and a motor. The neodymium-iron-boron magnet material of the present invention comprises an amorphous RE-rich phase located in a grain boundary phase, wherein the composition and atomic ratio of elements in the amorphous RE-rich phase are that TM : RE : Cu : Ga = (15-30) : (40-60) : (10-25) : (10-30); the volume ratio of the amorphous RE-rich phase to the grain boundary phase is 3-8%; and TM is Fe and Co, and RE is a rare earth element. The neodymium-iron-boron magnet material of the present invention can improve coercivity without using heavy rare earth elements while maintaining higher residual magnetism and a higher magnetic energy product.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

Disclosed are an R-T-B magnet, a preparation method therefor, and a use thereof. The R-T-B magnet comprises R, Fe, B and M; R is a rare earth element; M comprises one or more among Al, Cu and Ga. The R-T-B magnet comprises main phase grain A, grain boundary phase A, main phase grain B and grain boundary phase B; in a region 100 μm in depth inward from the outer surface of the R-T-B magnet, 5%-60% of the main phase grains A is contained, the foregoing percentages being percentages of the volume of the main phase grain A in the volume of the region 100 μm in depth inward from the outer surface of the R-T-B magnet. In the R-T-B sintered magnet of the present invention, Br≥13.4 kGs, Hcj≥25.86 kOe, and the magnet has relatively high squareness.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

Disclosed are a grain boundary diffusion material, an R-T-B magnet, and a preparation method therefor. The grain boundary diffusion material comprises a diffusion matrix and a diffusion source. The diffusion matrix comprises the following components: 28.5-33.5 wt% of R, R being a rare earth element; 0-0.5 wt% of Ga; 0.9-1.02 wt% of B; and 65-70 wt% of Fe. The diffusion source comprises the following components: 0-70 wt% of HR (but not including 0 wt%), HR being a heavy rare earth element and comprising Dy and/or Tb; greater than or equal to 10 wt% of Ga; 0-10 wt% of Cu; 0-10 wt% of Co; 0-8 wt% of Al; and 0-8 wt% of Fe. Compared with diffusion matrices before grain boundary diffusion, an R-T-B magnet prepared by using the grain boundary diffusion material of the present invention has significantly improved coercivity and temperature stability, and the remanence thereof is basically unchanged.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 1/055 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

Disclosed in the present invention are a rare earth permanent magnet, a sintered magnet material, a preparation method, and the use. A material for a sintered magnet comprises a first component and a second component. The first component comprises: R: 29-33 mass%, R being a rare earth element; B: 0.86-1 mass%; Cu: 0-0.5 mass%, excluding 0; Ga: 0-0.5 mass%, excluding 0; and Fe: 64-70 mass%. The second component comprises an antioxidant and a high-melting-point carbide, wherein the high-melting-point carbide comprises one or more of titanium carbide, zirconium carbide, chromium carbide, niobium carbide, tantalum carbide, molybdenum carbide, tungsten carbide, vanadium carbide and hafnium carbide; and the content of the high-melting-point carbide is 0.1-0.5 mass%, and mass% is the mass percentage of each component in the material for a sintered magnet. Both the residual magnetism and the coercive force of the sintered magnet of the present invention can be kept at a high level.

IPC Classes  ?

• H01F 1/055 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
• H01F 1/09 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials mixtures of metallic and non-metallic particlesMagnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metallic particles having oxide skin
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

Disclosed in the present invention are an antioxidant composition, a rare earth permanent magnet, a sintered magnet material, and a preparation method. The antioxidant composition comprises the following components: 30-60 mas% of poly-α-olefin; 10-30 mas% of butyl oleate; 1-20 mas% of a fatty acid methyl ester; and 10-40 mas% of solvent naphtha. When used in the process of preparing a permanent magnet, the antioxidant composition can improve the dispersity of a powder and the grinding efficiency, has excellent wettability, can encapsulate a magnetic powder well and prevent oxygen and nitrogen from contacting with the magnetic powder, achieves an antioxidation effect, and reduces the content of nitrogen; moreover, under the premise that the content of carbon is high, high residual magnetism and coercive force of a sintered magnet and a rare earth permanent magnet can be guaranteed.

IPC Classes  ?

• H01F 1/055 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
• B22F 1/10 - Metallic powder containing lubricating or binding agentsMetallic powder containing organic material
• B22F 9/04 - Making metallic powder or suspensions thereofApparatus or devices specially adapted therefor using physical processes starting from solid material, e.g. by crushing, grinding or milling

Abstract

Disclosed in the present invention are a sintered neodymium-iron-boron magnet material, a preparation method therefor and an application thereof. The preparation method disclosed in the present invention comprises: smelting, casting, crushing, molding, sintering and aging raw materials, wherein casting is performed by using a strip casting method in which the rotational speed of a copper roller is 2 m/s-4 m/s, and the temperature of cooling water is 5-15°C. The raw materials of the sintered neodymium-iron-boron magnet material comprise 0.88%-0.93% of B; 0.05%-0.45% of X, wherein X is Zr and/or Ti; 0.3%-0.7% of Ga; 28%-31% of Y, wherein Y is Pr and/or Nd; 0%-2% of Z, wherein Z is Dy and/or Tb; 0.2%-1% of Cu; 0%-1% of Co; and 0%-1% of Al, with the balance being Fe. The sintered neodymium-iron-boron magnet material is high in mechanical strength, so that the defect rate of the sintered neodymium-iron-boron magnet material during machining can be reduced, thereby reducing machining costs of the sintered neodymium-iron-boron magnet material.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
• C22C 38/10 - Ferrous alloys, e.g. steel alloys containing cobalt
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium

Abstract

The present invention discloses a grain boundary diffusion material, a neodymium-iron-boron magnet, a preparation method therefor, and the use thereof. The grain boundary diffusion material of the neodymium-iron-boron magnet comprises a diffusion matrix and a diffusion source, wherein the diffusion source is a raw material to be diffused which is added during a grain boundary diffusion treatment, and the diffusion matrix comprises the following components: 29-30 wt.% of LR which is a light rare earth element; 0.15-0.5 wt.% of Cu; 0.99-1.05 wt.% of B; and 67-70 wt.% of Fe, wherein the wt.% is a percentage of the mass of each component to the total mass of the neodymium-iron-boron magnet; the diffusion source comprises Cu and Tb; and the percentage of the mass of Cu in the neodymium-iron-boron magnet to the total mass of the neodymium-iron-boron magnet is greater than 0.5 wt.%. On the premise that the same content of a heavy rare earth element is added to the neodymium-iron-boron magnet prepared from the grain boundary diffusion material of the neodymium-iron-boron magnet in the present invention, the coercive force can be more remarkably improved, and the residual magnetism remains basically unchanged.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

Disclosed are a neodymium-iron-boron magnet material and a preparation method therefor and an application thereof. The neodymium-iron-boron magnet material comprises: 28-33wt.% of R, R being a rare earth element and comprising Nd; 27-31.5wt.% of Nd; 0.30-1.3wt.% of Al; 0.35-0.6wt.% of Cu; 0

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C22C 38/10 - Ferrous alloys, e.g. steel alloys containing cobalt
• C22C 38/12 - Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium or niobium
• C22C 38/16 - Ferrous alloys, e.g. steel alloys containing copper
• C22C 33/02 - Making ferrous alloys by powder metallurgy
• C21D 6/00 - Heat treatment of ferrous alloys

Abstract

Disclosed are a neodymium-iron-boron magnetic material, and a preparation method therefor and an application thereof. The neodymium-iron-boron magnetic material comprises the following components: 28-33 wt% of R, R being a rare earth element, and R comprising Nd and Pr, 27-31.5 wt% of Nd; 0.30-1.3 wt% of Al; 0.35-0.6 wt% of Cu; 0.85 wt% or more of Co; 0.98-1.2 wt% of B; 0.25 wt% or more of Nb; and 62-69 wt% of Fe, wt% representing the percentage of the mass of each component to the total mass of the neodymium-iron-boron magnetic material, and the content of Nd and Pr in the neodymium-iron-boron magnetic material satisfying the following formula: Nd/Pr≥58. The neodymium-iron-boron magnetic material prepared by the optimized formula in the present invention maintains remanence and squareness at a relatively high level while the coercive force thereof is improved.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium

Abstract

The present application provides N,N-dihydrocarbonyl amino carboxylic acid, a preparation method therefor, and the use thereof. The N,N-dihydrocarbonyl amino carboxylic acid can act as an extracting agent for enriching rare-earth elements from a low-concentration rare-earth raw material, separating and purifying yttrium from a mixed rare-earth raw material, and separating elements such as aluminum, iron, radioactive thorium, radioactive uranium and actinide from a mixed rare-earth raw material. The compound is simple to synthesize, low cost and has good chemical stability as an extracting agent, and can resist strong acids and strong alkalis without being decomposed.

IPC Classes  ?

• C07C 227/04 - Formation of amino groups in compounds containing carboxyl groups
• C07C 229/30 - Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and unsaturated
• C07C 229/12 - Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having only one amino and one carboxyl group bound to the carbon skeleton the nitrogen atom of the amino group being further bound to acyclic carbon atoms or to carbon atoms of rings other than six-membered aromatic rings to carbon atoms of acyclic carbon skeletons
• C07C 231/02 - Preparation of carboxylic acid amides from carboxylic acids or from esters, anhydrides, or halides thereof by reaction with ammonia or amines
• C07C 233/09 - Carboxylic acid amides having carbon atoms of carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms having nitrogen atoms of carboxamide groups bound to hydrogen atoms or to carbon atoms of unsubstituted hydrocarbon radicals with carbon atoms of carboxamide groups bound to carbon atoms of an acyclic unsaturated carbon skeleton
• C22B 3/32 - Carboxylic acids
• C22B 59/00 - Obtaining rare earth metals

Abstract

Provided are an N,N-dihydrocarbyl amide carboxylic acid, a preparation method therefor and a use thereof. The N,N-dihydrocarbyl amide carboxylic acid can be used as an extractant to enrich rare earth elements from a low-concentration rare earth raw material, to separate and purify yttrium element from a mixed rare earth raw material, and to separate elements such as aluminum, iron, radioactive thorium, radioactive uranium and actinium from the mixed rare earth raw material. The compound is easy to synthesize, low in cost, good in chemical stability as an extractant, and is resistant to strong acids and strong bases without decomposition.

IPC Classes  ?

• C07C 233/05 - Carboxylic acid amides having carbon atoms of carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms having nitrogen atoms of carboxamide groups bound to hydrogen atoms or to carbon atoms of unsubstituted hydrocarbon radicals with carbon atoms of carboxamide groups bound to carbon atoms of an acyclic saturated carbon skeleton having the nitrogen atoms of the carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms
• C07C 233/09 - Carboxylic acid amides having carbon atoms of carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms having nitrogen atoms of carboxamide groups bound to hydrogen atoms or to carbon atoms of unsubstituted hydrocarbon radicals with carbon atoms of carboxamide groups bound to carbon atoms of an acyclic unsaturated carbon skeleton
• C07C 231/02 - Preparation of carboxylic acid amides from carboxylic acids or from esters, anhydrides, or halides thereof by reaction with ammonia or amines
• C22B 3/32 - Carboxylic acids
• C22B 59/00 - Obtaining rare earth metals

Abstract

Disclosed are an R-T-B permanent magnetic material, a preparation method therefor and the use thereof. The R-T-B permanent magnetic material comprises the following components by mass content: 26.5 to 32.0 mass percentage of R, R being a rare earth element containing at least Nd; 0.58 to 0.65 mass percentage of Cu; 0.21 to 0.33 mass percentage of Ga; B ≥ 0.99 mass percentage; 64.0 to 69.5 mass percentage of Fe; and 0.15 to 1.2 mass percentage of N, N being one or more of Zr, Ti, Nb and Hf. The percentage is the mass percentage of the mass of each component in the total mass of the R-T-B permanent magnetic material. In the present invention, the R-T-B permanent magnet material has uniformly distributed heavy rare earth elements, excellent magnet performance and a uniform performance.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

Disclosed are an R-T-B magnet and a preparation method therefor. The R-T-B magnet comprises the following components: R ≥30.0 wt.%, R being a rare earth element; 0.16-0.6 wt.% of Cu; 0.4-0.8 wt.% of Ti; Ga ≤0.2 wt.%; 0.955-1.2 wt.% of B; and 58-69 % of Fe, wherein wt.% is the mass percentage of the mass of each component in the total mass of the components. The R-T-B magnet in the present invention has relatively high residual magnetization, coercivity, squareness and high-temperature stability.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 1/055 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

Disclosed are an R-T-B magnet and a preparation method therefor. The R-T-B magnet comprises the following components: R ≥29 wt.%, R being a rare earth element and containing Nd, wherein Nd is ≥22 wt.%; 0.2-0.75 wt.% of Ti+Nb; 0.05-0.45 wt.% of Cu; 0.955-1.15 wt.% of B; and 58-69 wt.% of Fe, wherein wt.% is the ratio of the mass of each component to the total mass of the components; and the mass ratio of Ti to Nb is (1-5):1. According to the present invention, the matching relationship among the added elements in the R-T-B magnet is further optimized, and an R-T-B magnet with better magnetic properties such as relatively high residual magnetization, coercivity, and squareness can be prepared by using the formula.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 1/055 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

Disclosed are an R-T-B magnet and a manufacturing method therefor. The R-T-B magnet comprises the following components: R: ≥ 30.0 wt.%, R being a rare earth element, Nb: 0.1-0.3 wt.%; B: 0.955-1.2 wt.%; and Fe: 58-69 wt.%; wt.% being the percentage of the total mass of the components that the mass of each component accounts for. The R-T-B magnet also contains Co and Ti. In the R-T-B magnet, the ratio of the mass content of Co to the total mass content of "Nb and Ti" is 4-10. The present invention further optimizes the matching relations among the components of the R-T-B magnet and allows the preparation of magnet materials having high levels in magnetic properties such as remanence, coercivity, and squareness.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B

Abstract

Disclosed are an R-T-B magnet and a manufacturing method therefor. The R-T-B magnet comprises the following components: R: ≥ 30.0 wt.%, R being a rare earth element, Nb: 0.02-0.14 wt.%; Cu: 0.2-0.48 wt.%; Ti + Nb: ≤ 0.24 wt.%; Al + Cu: ≤ 0.50 wt.%; B: ≥ 0.955 wt.%; and Fe: 58-69 wt.%; wt.% being the percentage of the total mass of the components that the mass of each component accounts. The remanence, coercivity, and squareness of the R-T-B magnet of the present invention are at improved levels.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 1/055 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

21421421421421461313X phase. By means of the present invention, the double-shell neodymium-iron-boron magnet can be obtained, and a relatively thin shell is formed around a main phase, such that the amount of heavy rare earth elements being diffused into the main phase is effectively reduced.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

21421421421421461313B phase, wherein R is one or more of Nd, Pr, Dy and Tb. The method of the present invention effectively reduces the diffusion amount of heavy rare earth elements into the main phase, forms a thinner heavy rare earth shell layer, and can further optimize the high-temperature performance of the magnet.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B

Abstract

Disclosed in the present invention are a main and auxiliary alloy-based neodymium-iron-boron magnet material and a preparation method therefor. A raw material composition of the main and auxiliary alloy-based neodymium-iron-boron magnet material of the present invention comprises a main alloy raw material and an auxiliary alloy raw material, and the mass percentage of the auxiliary alloy raw material in the raw material composition of the main and auxiliary alloy-based neodymium-iron-boron magnet material is 1.0-15.0 mas%. For the main and auxiliary alloy-based neodymium-iron-boron magnet material prepared by using the raw material composition, the coercivity is increased while high remanence is ensured, and the preparation method therefor can be suitable for engineering application.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 1/058 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IVa elements, e.g. Gd2Fe14C
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C22C 38/10 - Ferrous alloys, e.g. steel alloys containing cobalt
• C22C 38/12 - Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium or niobium
• C22C 38/14 - Ferrous alloys, e.g. steel alloys containing titanium or zirconium
• C22C 38/16 - Ferrous alloys, e.g. steel alloys containing copper
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
• C22C 33/02 - Making ferrous alloys by powder metallurgy

Abstract

Disclosed in the present invention are a heavy rare earth alloy, a neodymium-iron-boron permanent magnet material, a raw material, and a preparation method. The heavy rare earth alloy comprises the following components: RH: 30-100 mas%, not including 100 mas%; X, 0-20 mas%, not including 0; B: 0-1.1 mas%; and Fe and/or Co: 15-69 mas%, RH comprising one or more heavy rare earth elements in Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, and Sc, and X being Ti and/or Zr. When the heavy rare earth alloy of the present invention is used as a sub-alloy to prepare the neodymium-iron-boron permanent magnet material, a high utilization rate of heavy rare earth is achieved, so that the coercivity can also be greatly improved while the neodymium-iron-boron permanent magnet material maintains high remanence.

IPC Classes  ?

• C22C 38/14 - Ferrous alloys, e.g. steel alloys containing titanium or zirconium
• C22C 38/12 - Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium or niobium
• C22C 38/10 - Ferrous alloys, e.g. steel alloys containing cobalt
• C22C 38/08 - Ferrous alloys, e.g. steel alloys containing nickel
• C22C 38/16 - Ferrous alloys, e.g. steel alloys containing copper
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C22C 38/32 - Ferrous alloys, e.g. steel alloys containing chromium with boron
• C22C 38/30 - Ferrous alloys, e.g. steel alloys containing chromium with cobalt
• C22C 38/28 - Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
• C22C 38/26 - Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
• C22C 38/24 - Ferrous alloys, e.g. steel alloys containing chromium with vanadium
• C22C 38/22 - Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
• C22C 38/20 - Ferrous alloys, e.g. steel alloys containing chromium with copper
• C22C 38/54 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
• C22C 38/52 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
• C22C 38/50 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
• C22C 38/48 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
• C22C 38/46 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
• C22C 38/44 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
• C22C 38/42 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
• C22C 38/60 - Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium or antimony, or more than 0.04% by weight of sulfur
• C22C 33/02 - Making ferrous alloys by powder metallurgy
• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

Disclosed in the present invention are a neodymium-iron-boron magnet material, a raw material composition thereof, a preparation method therefor, and an application thereof. The raw material composition of the neodymium-iron-boron magnet material contains: a first component: a light rare earth element (LR), wherein the LR comprises: Nd; Ho: 0-10 mas%, not including 0 mas%; Cu: 0.35-0.6 mas%; C: 0-0.32 mas%; Ga: 0-0.42 mas%, not including 0 mas%; Co: 0-0.5 mas%; Al: 0-0.5 mas%; X: 0.05-0.5 mas%; B: 0.9-1.05 mas%; and the balance of Fe, and the first component does not comprise other heavy rare earth elements in addition to Ho; and a second component: Dy and/or Tb: 0.2-1 mas%. The neodymium-iron-boron magnet material in the present invention has good grain boundary continuity, high remanence, high coercivity, excellent high-temperature performance, and excellent corrosion resistance.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
• B22F 1/00 - Metallic powderTreatment of metallic powder, e.g. to facilitate working or to improve properties
• C22C 33/02 - Making ferrous alloys by powder metallurgy
• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C22C 38/10 - Ferrous alloys, e.g. steel alloys containing cobalt
• C22C 38/12 - Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium or niobium
• C22C 38/14 - Ferrous alloys, e.g. steel alloys containing titanium or zirconium
• C22C 38/16 - Ferrous alloys, e.g. steel alloys containing copper

Abstract

Disclosed are an R-T-B-based permanent magnetic material, a raw material composition, a preparation method therefor and a use thereof. The raw material composition of the R-T-B-based permanent magnetic material contains the following components in percentages by mass: R: 29.5-32%, R being a rare earth element containing at least Nd, and the content of Pr being 0-17%; Zr: 0.15- 0.50%; Cu: 0-0.08%, but not 0 and not 0.08; Co: 0-0.3%; M: 0-3%, M being one or more of Al, Ga, Ti, Nb, Hf, Si, Sn, Ge, Ag, Au, Bi and Mn; B: 0.95-1.05%; and Fe: 64-70%. The percentage is the mass percentage of the total mass of the raw material composition of the R-T-B-based permanent magnetic material, and the sum of the content of each component is 100%. The R-T-B-based permanent magnetic material of the present invention has the advantages of having a good squareness, a good high-temperature property and excellent mechanical properties.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 1/08 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• C22C 33/02 - Making ferrous alloys by powder metallurgy

Abstract

Provided are an R-T-B based permanent magnetic material, a raw material composition, a preparation method therefor and the use thereof. The raw material composition of the R-T-B based permanent magnetic material comprises the following components in percentages by mass: R: 29.5-32%, R being a rare earth element containing at least Nd, and the content of Pr being 0-17%; Zr: 0.15- 0.50%; Cu: 0.35-0.55%; Co: 0-0.3%; M: 0-3%, M being one or more of Al, Ga, Ti, Nb, Hf, Si, Sn, Ge, Ag, Au, Bi and Mn; B: 0.95-1.05%; and Fe: 64-70%. The percentage is the mass percentage of the total mass of the raw material composition of the R-T-B based permanent magnetic material, and the sum of the content of the components is 100%. The R-T-B based permanent magnetic material has the advantages of having a good squareness, a good high-temperature property and excellent mechanical properties.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• C22C 33/02 - Making ferrous alloys by powder metallurgy

Abstract

A neodymium-iron-boron magnet material, a raw material composition, and a preparation method and application of the neodymium-iron-boron magnet material. The raw material composition of the neodymium-iron-boron magnet material comprises: a first component: LR comprising Nd, 0 to 10 mass percent but not equal to 0 of Ho, 0.12 to 0.45 mass percent of C, 0.12 to 0.6 mass percent of Cu, 0 to 0.42 mass percent but not equal to 0 of Ga, 0 to 0.5 mass percent of Co, 0 to 0.5 mass percent of Al, 0.05 to 0.45 mass percent of X, 0.9 to 1.05 mass percent of B, and the balance of Fe, wherein the first component does not comprise other heavy rare earth elements except Ho; and a second component: 0.2 to 1 mass percent of Dy and/or Tb. The neodymium-iron-boron magnet material is good in grain boundary continuity, high in residual magnetism, high in coercive force, good in high-temperature performance, and good in corrosion resistance.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
• H01F 7/02 - Permanent magnets

Abstract

Disclosed are a neodymium-iron-boron magnet material, a raw material composition, a preparation method therefor and the use thereof. The raw material composition of the neodymium-iron-boron magnet material comprises: LR, including Nd; 0-10 mas% of Ho, but not 0; 0-5 mas% of Gd; 0-3 mas% of Dy; 0-3 mas% of Tb, wherein Gd, Dy and Tb are not 0 at the same time; 0.12-0.45 mas% of C; 0.12-0.6 mas% of Cu; 0-0.42 mas% of Ga, but not 0; 0-0.5 mas% of Co; 0-0.5 mas% of Al; 0.05-0.45 mas% of X; 0.9-1.05 mas% of B; the balance being Fe; and 0.2-1 mas% of Dy and/or Tb. The neodymium-iron-boron magnet material has a good grain boundary continuity, a high remanence, a high coercivity, a good high-temperature performance and a good corrosion resistance.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
• B22F 1/00 - Metallic powderTreatment of metallic powder, e.g. to facilitate working or to improve properties
• C22C 33/02 - Making ferrous alloys by powder metallurgy
• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C22C 38/08 - Ferrous alloys, e.g. steel alloys containing nickel
• C22C 38/10 - Ferrous alloys, e.g. steel alloys containing cobalt
• C22C 38/12 - Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium or niobium
• C22C 38/14 - Ferrous alloys, e.g. steel alloys containing titanium or zirconium
• C22C 38/16 - Ferrous alloys, e.g. steel alloys containing copper

Abstract

Disclosed are a neodymium-iron-boron magnet material, a raw material composition and a preparation method and a use thereof. The raw material composition of the neodymium-iron-boron magnet material comprises: a first component: LR, wherein LR comprising Nd; 0 mas%-10 mas% of Ho, Ho being not 0; 0 mas%-5 mas% of Gd; 0 mas%-3 mas% of Dy; 0 mas%-3 mas% of Tb; the Gd, the Dy and the Tb are not 0 at the same time; 0.35 mas%-0.6 mas% of Cu; 0 mas%-0.32 mas% of C; 0 mas%-0.42 mas% of Ga, Ga being not 0; 0 mas%-0.5 mas% of Co; 0 mas%-0.5 mas% of Al; 0.05 mas%-0.5 mas% of X; 0.9 mas% -1.05 mas% of B; and the balance being Fe; and a second component: 0.2 mas%-1 mas% of Dy and/or Tb. The neodymium-iron-boron magnet material has high residual magnetism, high coercive force, good high-temperature performance and good corrosion resistance.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 1/08 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• C22C 33/02 - Making ferrous alloys by powder metallurgy

Abstract

Disclosed are an R-T-B-based permanent magnetic material, a raw material composition, a preparation method therefor and a use thereof. The raw material composition of the R-T-B-based permanent magnetic material contains the following components: R: 29.5-32%, R being a rare earth element containing at least Nd, and the content of Pr being 0-17%; Zr: 0.15- 0.50%; Ga: 0-1%, but not 0, and when the content of Ga is 0.21-0.46%, the content of Zr is 0.34-0.5%; Co: 0-0.3%; M: 0-3%, M being one or more of Al, Cu, Ti, Nb, Hf, Si, Sn, Ge, Ag, Au, Bi and Mn; B: 0.95-1.05%; and Fe: 64-70%. The percentage is the mass percentage of each component in the total mass of the raw material composition of the R-T-B-based permanent magnetic material, and the sum of the content of each component is 100%. The R-T-B-based permanent magnetic material of the present invention has the advantages of having a good squareness, a good high-temperature property and excellent mechanical properties.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
• C22C 33/02 - Making ferrous alloys by powder metallurgy
• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C22C 38/10 - Ferrous alloys, e.g. steel alloys containing cobalt
• C22C 38/12 - Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium or niobium
• C22C 38/14 - Ferrous alloys, e.g. steel alloys containing titanium or zirconium
• C22C 38/16 - Ferrous alloys, e.g. steel alloys containing copper

Abstract

Disclosed are an R-T-B-based permanent magnetic material, a raw material composition, a preparation method therefor and a use thereof. The raw material composition of the R-T-B-based permanent magnetic material contains the following components in percentages by mass: R: 29.5-32%, R being a rare earth element containing at least Nd, and the content of Pr being 0-17%; Zr: 0.15- 0.50%; Al: 0.45-1.0%; Co: 0-0.3%; M: 0-3%, M being one or more of Ga, Cu, Ti, Nb, Hf, Si, Sn, Ge, Ag, Au, Bi and Mn; B: 0.95-1.05%; and Fe: 64-70%. The percentage is the mass percentage of each component in the total mass of the raw material composition of the R-T-B-based permanent magnetic material, and the sum of the content of each component is 100%. The R-T-B-based permanent magnetic material of the present invention has the advantages of having a good squareness, a good high-temperature property and excellent mechanical properties.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

AAABBBB, 0-0.3 mas% of N2, 0.85-1 mas% of B and 60-70 mas% of Fe; the content of N1 and N2 is not 0 at the same time; and the mass ratio of the main alloy A and the main alloy B is 50 : 50-95 : 5. The neodymium iron boron magnet material made from the raw material composition has an improved grain boundary continuity, a reduced triangle area and a reduced temperature coefficient.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
• B22F 1/00 - Metallic powderTreatment of metallic powder, e.g. to facilitate working or to improve properties
• C22C 33/02 - Making ferrous alloys by powder metallurgy

Abstract

Disclosed are a neodymium-iron-boron permanent magnet material, a raw material composition thereof, and a preparation method therefor. The raw material composition for preparing the neodymium-iron-boron permanent magnet material comprises the following components: 0.25-0.5 mas% of Nb; and 0.55-0.8 mas% of Cu. The neodymium-iron-boron permanent magnet material prepared by the raw material composition has a square degree of 99% or more, an Hcj temperature coefficient absolute value of 0.422% or less at 20-150ºC, and a heat treatment temperature zone of 470-510ºC, with Br ≥ 14 kGs and a coercive force ≥ 25 kOe.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 1/08 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• C22C 33/02 - Making ferrous alloys by powder metallurgy

Abstract

Disclosed are a neodymium-iron-boron permanent magnet material, a raw material composition therefor and a preparation method therefor. The raw material composition for preparing the neodymium-iron-boron permanent magnet material comprises the following components: R: 30.2-31.7 mass%, R being a rare earth element; Nb: <0.25 mas% and not 0; Cu: 0.35-0.5 mass%; Al: 0-0.2 mass%; B: 0.92-0.96 mass%; and Fe: 60- 70 mass%. The sum of the components is 100 mass%, R comprises heavy rare earth metal RH, and RH comprises Dy and/or Tb. The square degree of the neodymium-iron-boron permanent magnet material prepared from the raw material composition is 99% or above; the absolute value of the temperature coefficient of Hcj at 20-150°C is 0.404% to 0.414%; the heat treatment temperature range is 470-510°C; Br ≥ 14 kGs, and the coercive force ≥ 25 kOe.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
• B22F 1/00 - Metallic powderTreatment of metallic powder, e.g. to facilitate working or to improve properties
• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium

Abstract

Disclosed in the present invention are a neodymium-iron-boron magnet material, a raw material composition, a preparation method, and an application. The raw material composition of a neodymium-iron-boron magnet material I contains: R: 29.5-32.5 wt%, R being a rare-earth element and comprising rare-earth metal R1 for smelting and rare-earth metal R2 for grain boundary diffusion, the content of R2 being 0.2-1 wt%, R1 comprising Nd, Ho, and Gd and not comprising Dy and/or Tb, and R2 comprising Dy and/or Tb; Co: 0-0.5 wt%; B: 0.9-1.05 wt%; Cu: 0-0.35 wt%, not covering 0; Ga: 0-0.35 wt%, not covering 0; AI: 0-0.5 wt%; X: 0.05-0.45 wt%, X comprising one or more of Ti, Nb, Zr, Hf, V, Mo, W, Ta, and Cr; and Fe: 66-70 wt%. The magnet material has high grain boundary continuity and good magnetic properties.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/10 - Ferrous alloys, e.g. steel alloys containing cobalt
• C22C 38/16 - Ferrous alloys, e.g. steel alloys containing copper
• C22C 38/14 - Ferrous alloys, e.g. steel alloys containing titanium or zirconium
• C22C 38/12 - Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium or niobium

Abstract

Disclosed are a neodymium-iron-boron magnet material, a raw material composition, a preparation method therefor and the use thereof. The raw material composition of the neodymium-iron-boron magnet material comprises a first component: LR: 13-31.5 wt%, wherein LR comprises Nd, Ho: 0-10 wt% and not being 0, Gd: 0-5 wt% and not being 0, Dy and/or Tb: 0-3 wt % and not being 0, Cu: 0-0.35 wt% and not being 0, Ga: 0-0.35 wt% and not being 0, Al: 0-0.5 wt%, X: 0.05-0.45 wt%, Co: 0-0.5 wt%, B: 0.9-1.05 wt%, and the balance being Fe; and a second component: Dy and/or Tb: 0.2-1 wt%, wherein the total rare earth content is 29.5-32.5 wt%. The neodymium-iron-boron magnet material has a high remanence, a high coercivity and good high-temperature performance.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium

Abstract

Disclosed are a neodymium iron boron magnet material, a raw material composition, a preparation method and a use. The raw materials of the neodymium iron boron magnet material comprise: 29.5-32.5wt% of R, R comprising rare earth metal R1 for smelting and rare earth metal R2 for grain boundary diffusion, wherein R1 comprises Nd and Ho and does not comprise Dy and/or Tb, and wherein R2 comprises Dy and/or Tb, the content of R2 being 0.2-1wt%; 0-0.5wt% of Co; 0.9-1.05wt% of B; 0-0.35wt% of Cu; 0-0.35wt% of Ga; 0-0.5wt% of Al; 0.05-0.45wt% of X which comprises one or more of Ti, Nb, Zr, Hf, V, Mo, W, Ta and Cr and does not comprise Gd; and 65-70wt% of Fe. The magnet material of the preset invention has the advantages of high residual magnetism, high coercive force and good high-temperature performance.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B

Abstract

Disclosed are an R-T-B-based permanent magnet material, a preparation method therefor and the use thereof. The R-T-B-based permanent magnet material comprises R, B, M, Fe, Co, X and inevitable impurities, wherein: (1) R is a rare earth element, and the R includes at least Nd and RH, M being one or more of Ti, Zr and Nb, and X including Cu, "Al and/or Ga"; and (2) in percentage by weight, R: 30.5-32.0 wt%, B: 0.95-0.99 wt%, M: 0.3-0.6 wt%, X: 0.8-1.8 wt%, and Cu: 0.35-0.50 wt%, and the balance is Fe, Co and inevitable impurities. According to the present invention, under the condition of 0.3-0.6 wt% of a high melting point metal, a permanent magnet material with an excellent magnet performance and a good squareness is obtained.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
• H01F 38/14 - Inductive couplings
• H01F 38/12 - Ignition, e.g. for IC engines
• H01F 38/16 - Cascade transformers, e.g. for use with extra high tension

Abstract

Disclosed in the present invention are an NdFeB magnet material, and a raw material composition thereof, a preparation method therefor, and application thereof. A raw material composition of NdFeB magnet material A, containing: 29.5-32.5wt% of R, R being a rare earth element and comprising rare earth metal R1 for smelting and rare earth metal R2 for grain boundary diffusion, R1 comprising Nd, Ho, and Dy and/or Tb, and R2 comprising Dy and/or Tb; 0-0.5wt% of Co; 0.9-1.05wt% of B; 0-0.35wt% of Cu; 0-0.35wt% of Ga; 0-0.5wt% of Al; 0.05-0.45wt% of X, X comprising one or more of Ti, Nb, Zr, Hf, V, Mo, W, Ta, and Cr; and 65-70wt% of Fe. The raw material composition of NdFeB magnet material A does not contain Gd. The NdFeB magnet material of the present invention has high remanence, high coercivity, and good high-temperature performance.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C22C 38/10 - Ferrous alloys, e.g. steel alloys containing cobalt
• C22C 38/12 - Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium or niobium
• C22C 38/14 - Ferrous alloys, e.g. steel alloys containing titanium or zirconium
• C22C 38/16 - Ferrous alloys, e.g. steel alloys containing copper
• C22C 38/20 - Ferrous alloys, e.g. steel alloys containing chromium with copper
• C22C 38/22 - Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
• C22C 38/24 - Ferrous alloys, e.g. steel alloys containing chromium with vanadium
• C22C 38/32 - Ferrous alloys, e.g. steel alloys containing chromium with boron
• C22C 33/02 - Making ferrous alloys by powder metallurgy

Abstract

Disclosed are a neodymium-iron-boron magnet material, a raw material composition, a preparation method therefor and a use thereof. The raw material composition of the neodymium-iron-boron magnet material comprises the following components in weight content: R: 28-33%, R being rare earth elements and comprising R1 and R2, R1 being a rare earth element added during smelting, R1 comprising Nd and Dy, R2 being a rare earth element added during grain boundary diffusion, R2 comprising Tb, and the content of R2 being 0.2-1%; M: ≤ 0.4% but not 0, M being one or more elements from among Bi, Sn, Zn, Ga, In, Au, and Pb; Cu: ≤ 0.15% but not 0; B: 0.9-1.1%; Fe: 60-70%; but not containing Co. The neodymium-iron-boron magnet material, under the condition of adding a small amount of heavy rare earth elements and not adding cobalt, can still have a relatively high coercivity and remanence, and excellent thermal stability.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

Provided in the present invention are a neodymium-iron-boron magnet material, a raw material composition, a preparation method therefor and a use thereof. The raw material composition comprises: R: 28-33 wt%, R comprising R1 and R2, R1 being a rare earth element added during smelting, R1 comprising Nd and Dy, R2 being a rare earth element added during grain boundary diffusion, R2 comprising Tb, and the content of R2 being 0.2 wt% - 1 wt%; M: ≤ 0.4 wt% and not 0 wt%, M being one or more elements from among Ti, Ni, V, Nb, Ta, Cr, Mo, W, Mn, Zr, Hf, and Ag; Cu: ≤ 0.15 wt% and not 0 wt%; B: 0.9-1.1 wt%; Fe: 60 wt% - 70.88 wt%. The raw material composition does not contain Co. The magnet material of the present invention features the advantages of high remanence, high coercivity, and excellent high-temperature performance.

IPC Classes  ?

• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 1/08 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together
• B22F 3/10 - Sintering only

Abstract

A neodymium-iron-boron magnet material, a raw material composition, a preparation method therefor and a use thereof, the raw material composition containing the following components: R: 28-33 wt%, R being rare earth elements and comprising a rare earth metal used for smelting R1 and a rare earth metal used for grain boundary diffusion R2, the content of R2 being 0.2-1 wt%, R1 comprising Nd and not containing RH, and R2 comprising Tb; B: 0.9-1.1 wt%; Cu: 0.15 wt% or less and not 0 wt%; M: 0.4 wt% or less, and not 0 wt%, M being one or more elements from among Bi, Sn, Zn, Ga, In, Au, and Pb; Fe: 60-70 wt%; RH being a heavy rare earth element, the raw material composition not containing Co, and wt% being the weight percentage of each element in the raw material composition. The magnet material features the advantages of high remanence, high coercivity, and excellent high-temperature performance.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

Disclosed are a neodymium-iron-boron magnet material, a raw material composition, a preparation method therefor, and a use thereof, the raw materials including the following components: R: 28-33 wt %, R being rare earth elements, comprising R1 for smelting and R2 for grain boundary diffusion, the content of R2 being 0.2-1 wt %, and R1 comprising Nd, and not comprising RH; R2 comprises: Tb; B: 0.9-1.5 wt %; Cu: 0.15 wt % or less but not 0 wt %; M: 0.35 wt % or less, but not 0 wt %, and M being one or more of Bi, Sn, Zn, Ga, In, Au, and Pb; Fe: 60-70.55 wt %; RH is a rare earth element; Co: <0.5 wt %, but not 0 wt %. The present magnet material presents the advantages of high remanence, high coercivity and good high-temperature performance.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

Provided are a neodymium-iron-boron magnet material, raw material composition, preparation method, and application. The raw material composition of the neodymium-iron-boron magnet material comprises the following mass content components: R: 28–33%; R is a rare earth element, R comprises R1 and R2, R1 is a rare earth element added during smelting, and R1 comprises Nd and Dy; R2 is a rare earth element added during grain boundary diffusion, R2 comprises Tb, the content of R2 is 0.2–1%; Co: <0.5%, but not 0; M: ≤0.4%, but not 0, and M is one or more of Bi, Sn, Zn, Ga, In, Au, and Pb; Cu: ≤0.15%, but not 0; B: 0.9–1.1%; Fe: 60–70%; the percentage is the mass percentage of the mass of each component to the total mass of the raw material composition. The neodymium-iron-boron magnet material has high remanence, coercivity, and good thermal stability.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

A rare earth permanent magnet material, a preparation method for same, and applications thereof. The raw material composition of the rare earth permanent material comprises the following constituents in terms of mass content: R: 28.5-33.0%; Ga: 0.5-1.8% but not 0.5 wt%; B: 0.84-0.94%; Al: 0.05-0.07%; Co: ≤ 2.5% but not 0; Fe: 62-69%; and N: one or more of Ti, Zr, and Nb; when N comprises Ti, the content of Ti is 0.15-0.25%; when N comprises Zr, the content of Zr is 0.2-0.35%; when N comprises Nb, the content of Nb is 0.2-0.5%; and, the percentages are the mass percentages that the mass of each constituent accounts in the total mass of the raw material composition. The rare earth permanent magnet material provides improved magnetic performance (remanence, coercivity, squareness, and temperature stability), and the magnetic performance of a same batch of product is uniform.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

A rare earth permanent magnet material, a preparation method therefor, and an application thereof. The permanent magnet material contains the following components: R: 28.45-33.1 wt%, Ga: >0.35 wt%, Al: 0.08-0.125 wt%, B: 0.835-0.945 wt%, and Fe: 64.2-69.5 wt%, wherein when the permanent magnet material contains Ti, the content of Ti is 0.15-0.26 wt%; when the permanent magnet material contains Zr, the content of Zr is 0.2-0.355 wt%; when the permanent magnet material contains Nb, the content of Nb is 0.19-0.51 wt%; and an R-T-B permanent magnet material does not contain Co. The permanent magnet material has an excellent magnetic properties, a smooth demagnetization curve, is step-less, has a low relative magnetic permeability, and has a good consistency of magnetic performance.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

21461361313Cu is ≥3.5%. The neodymium iron boron material has high coercivity Hcj and Br, and the magnet has good temperature stability and an excellent performance. Moreover, the demagnetization curve thereof has no steps, the relative permeability is low, and the magnetic steel uniformity is good.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

A rare earth permanent magnet material, a preparation method therefor, and an application thereof. The rare earth permanent magnet material contains: R, Ga, Al, Fe, and B, also contains one or more of Ti, Zr, and Nb, and contains the following according to weight percentage: the content of R is 28.5-33.05%, the content of Ga is greater than 0.35%, the content of B is 0.84-0.945%, the content of Al is less than 0.08%, and an R-T-B permanent magnet material does not contain Co. The rare earth permanent magnet material has high coercivity Hcj and Br, a stable magnet temperature, and an excellent performance. In addition, the demagnetization curve thereof is step-less, the relative magnetic permeability is low, and the magnetic steel uniformity is good.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

Disclosed are an R-T-B system permanent magnet material, a preparation method therefor and the use thereof. A raw material composition for the R-T-B system permanent magnet material comprises the following amounts of components by mass: 28.5-33.0% of R; Ga: ＞0.5%; Cu: ≥0.4%; 0.84-0.94% of B; 0.05-0.07% of Al; Co: ≤2.5%, exclusive of 0; 60-70% of Fe; and N: one or more of Ti, Zr and Nb, wherein when N comprises Ti, the content of Ti is 0.15-0.25%, when N comprises Zr, the content of Zr is 0.2-0.35%, and when N comprises Nb, the content of Nb is 0.2-0.5%, with the percentages being the mass percentages of the components relative to the total mass of the raw material composition. The magnetic performance of the R-T-B system permanent magnet material is relatively good, and products of the same batch have a uniform magnetic performance.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

Disclosed in the present invention are a neodymium-iron-boron magnet material, a raw material composition, a preparation method therefor and a use thereof. The raw material composition comprises: R: 28-33%, R being rare earth elements and comprising R1 and R2, R1 being a rare earth element added during smelting, R1 comprising Nd and Dy, R2 being a rare earth element added during grain boundary diffusion, R2 comprising Tb, and the content of R2 being 0.2-1%; Co: < 0.5% but not 0; M: ≤ 0.4% but not 0, M comprising one or more elements from among Ti, Ni, V, Nb, Ta, Cr, Mo, W, Mn, Zr, Hf, and Ag; Cu: ≤ 0.15% but not 0; B: 0.9-1.1%; Fe: 60-70%; the percentages being the weight percentages occupied by each component in the raw material composition. The magnet material of the present invention features the advantages of high remanence, high coercivity, and excellent high-temperature performance.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

A neodymium-iron-boron magnet material, a raw material composition, a preparation method therefor and a use thereof, the raw material composition containing the following components: R: 28-33 wt%; R being rare earth elements and comprising a rare earth metal used for smelting R1 and a rare earth metal used for grain boundary diffusion R2, the content of R2 being 0.2-1 wt%, R1 comprising Nd and not containing RH, and R2 comprising Tb; B: 0.9-1.1 wt%; Cu: 0.15 wt% or less, and not 0 wt%; M: 0.4 wt% or less and not 0 wt%, M comprising one or more elements from among Ti, Ni, V, Nb, Ta, Cr, Mo, W, Mn, Zr, Hf, Zn, and Ag; Fe: 60-70.5 wt%; Co: ＜0.5 wt% and not 0 wt%; RH being a heavy rare earth element. The magnet material features the advantages of high remanence, high coercivity, and excellent high-temperature performance.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

A neodymium-iron-boron magnet material, a raw material composition, a preparation method therefor and a use thereof, containing the following components: R: 28-33 wt%; R being rare earth elements and comprising a rare earth metal used for smelting R1 and a rare earth metal used for grain boundary diffusion R2, the content of R2 being 0.2-1 wt%, R1 comprising Nd and not containing RH, and R2 comprising Tb; B: 0.9-1.1 wt%; Cu: 0.15 wt% or less and not 0 wt%; M: 0.4 wt% or less and not 0 wt%, M comprising one or more elements from among Ti, Ni, V, Nb, Ta, Cr, Mo, W, Mn, Zr, Hf, Zn, and Ag; Fe 60-70.6 wt%; RH being a heavy rare earth element, and the raw material composition not containing Co. The present magnet material features the advantages of high remanence, high coercivity, and excellent high-temperature performance.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

A neodymium-iron-boron material and a preparation method therefor and an application thereof. The raw material composition of the neodymium-iron-boron material comprises the following components by mass content: R: 28.5-34%, R being a rare earth element, and R comprising Nd; B: 0.84-0.94%; Cu: 0.45

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 1/08 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

An R-T-B based permanent magnet material, a preparation method therefor, and an application thereof. The R-T-B based permanent magnet material contains R, Ga, Cu, Al, Fe, and B, and further contains one or more of Ti, Zr, and Nb; the contents of said components are as follows in percentage by weight: the content of R is 28.5-33.03%, the content of Ga is 0.35% or more, the content of Cu is 0.4% or more, the content of B is 0.84-0.945%, and the content of Al is 0.08% or less; the R-T-B based permanent magnet material does not contain Co. The R-T-B based permanent magnet material has high coercivities Hcj and Br, good magnet temperature stability, and excellent performance; moreover, a demagnetization curve of the R-T-B based permanent magnet material has no step, the relative permeability is low, and the magnetic steel uniformity is good.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

Disclosed are an R-T-B system permanent magnet material, a preparation method therefor and the use thereof. A raw material composition for the R-T-B system permanent magnet material comprises the following amounts of components by mass: 28.5-34% of R, wherein R is a rare earth element and includes Nd; Ga >0.5%; Cu ≥0.4%; 0.84-0.94% of B; Co ≤2.5%; 59-69% of Fe; and N containing one or more of Ti, Zr and Nb, wherein when N comprises Ti, Ti is 0.15-0.25%, when N comprises Zr, Zr is 0.2-0.35%, and when N comprises Nb, Nb is 0.2-0.5%, with the percentages being the mass percentages relative to the total mass of the raw material composition. Where no heavy rare earth is added to the rare earth permanent magnet material, a low-boron aluminum-free system is used, and the magnetic properties, such as residual magnetism, coercivity, temperature stability and square degree, are relatively good; in addition, the magnetic performance of permanent magnet materials of the same batch is uniform.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

61313Cu phase in a grain boundary phase of the neodymium iron boron material is greater than or equal to 3.5%. The permanent magnet material is excellent in magnetic performance, low in relative permeability, and good in magnet performance consistency.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

A rare earth permanent magnet material, a preparation method therefor, and an application thereof. The raw material composition of the rare earth permanent magnet material comprises the following components: 28.5-33% of R, R being a rare earth element, comprising Nd; 0.84-0.94% of B; 0.6

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

Disclosed are an R-T-B system permanent magnet material, a preparation method therefor and the use thereof. The permanent magnet material comprises the following components: 28.4-33.1 wt% of R; Ga: ≥0.35 wt%; Al: 0.08-0.125 wt%; Cu: ≥0.4 wt%; 0.84-0.945 wt% of B; and 64.1-69.7 wt% of Fe, wherein when the permanent magnet material comprises Ti, the content of Ti is 0.15-0.255 wt%, when the permanent magnet material comprises Zr, the content of Zr is 0.195-0.35 wt%, and when the permanent magnet material comprises Nb, the content of Nb is 0.195-0.5 wt%; and the R-T-B system permanent magnet material does not contain Co. The permanent magnet material has excellent magnetic properties, a smooth demagnetization curve, no steps, a low relative magnetic permeability and a good magnetic performance consistency.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

Disclosed are a neodymium iron boron material, a preparation method therefor and the use thereof. A raw material composition for the neodymium iron boron material comprises the following components by mass: 28.5-33.0% of R, with R being a rare earth element containing at least Nd; 0.45-2% of Cu, exclusive of 0.45%; 0.84-0.94% of B; 0.05-0.07% of Al; Co: ≤2.5%, exclusive of 0; 62-70% of Fe; and N: one or more of Ti, Zr and Nb, wherein when N comprises Ti, the content of Ti is 0.15-0.25%, when N comprises Zr, the content of Zr is 0.2-0.35%, and when N comprises Nb, the content of Nb is 0.2-0.5%, with the percentages being the mass percentages of the components relative to the total mass of the raw material composition. The magnetic performance of the neodymium iron boron material is relatively good, and products of the same batch have a uniform magnetic performance.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

Disclosed is an R-Fe-B sintered magnet. The R-Fe-B sintered magnet is obtained by performing an HR grain boundary diffusion treatment on an R-Fe-B sintered green body, wherein the green body at least comprises 28 wt% to 33 wt% of R, which is at least one rare earth element including Nd; 0.83 wt% to 0.96 wt% of B; and 0.3 wt% to 1.2 wt% of M. A grain boundary diffusion direction is perpendicular to a magnetization direction, and along the diffusion direction, the ratio of the contents of HR between any two points in a diffusion plane, between which the distance is not more than 500 μm, is 0.1 to 1.0. Further disclosed in the present invention is a grain boundary diffusion treatment method, whereby grain boundary diffusion of a diffusion source occurs along a direction perpendicular to c axis. In addition, local demagnetization is efficiently controlled, a diffusion effect is enhanced, a manufacturing procedure is simplified, deformation factors are eliminated, and material utilization is greatly increased.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B

Abstract

An R-T-B series permanent magnet material, a raw material composition, a preparation method and an application. The R-T-B series permanent magnet material comprises the following components: R, B, Ti, Cu, and Ga; R is 29.0-31.5 wt.%, and B is 0.87-0.91 wt.%. R is a rare earth element; R comprises a light rare earth element RL, and RL comprises Nd; Ti, Cu, and Ga satisfy the following relational expression: (1) 0

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

1-yy217xx phase is present at the grain boundary of the R-T-B series permanent magnet material, x:2-3, y: 0.15-0.35, and T must comprise Fe, and also comprises one or more among Co, Ti and N. The permanent magnet material retains relative high Br and Hcj under different heat treatment temperatures.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• C22C 38/58 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese

Abstract

An R-T-B-based sintered magnet and a preparation method therefor. The R-T-B-based sintered magnet comprises: R, B, Ti, Ga, Al, Cu, and T. The contents thereof are as follows: the content of R is 29.0-33%; the content of B is 0.86-0.93%; the content of Ti is 0.05-0.25%; the content of Ga is 0.3-0.5%, but not 0.5%; the content of Al is 0.6-1%, but not 0.6%; the content of Cu is 0.36-0.55%. The percentage is the mass percentage. Under the condition that no heavy rare earth is added or a small amount of heavy rare earth is added, by using a low B technology, not only the remanence performance of the R-T-B-based sintered magnet is improved, but also the coercivity and the squareness of the magnet are ensured.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
• C22C 38/10 - Ferrous alloys, e.g. steel alloys containing cobalt
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• B22F 3/10 - Sintering only
• B22F 9/02 - Making metallic powder or suspensions thereofApparatus or devices specially adapted therefor using physical processes

Abstract

A neodymium-iron-boron permanent magnet material, a preparation method, and an application. The neodymium permanent magnet material includes R, Al, Cu, and Co; R comprises RL and RH; RL comprises one or many light rare earth elements among Nd, La, Ce, Pr, Pm, Sm, and Eu; RH comprises one or many heavy rare earth elements among Tb, Gd, Dy, Ho, Er, Tm, Yb, Lu, and Sc; the neodymium-iron-boron permanent magnet material satisfies the following relations: (1) B/R: 0.033-0.037; (2) Al/RH: 0.12-2.7. The neodymium-iron-boron permanent magnet material has uniquely advantageous magnetic and mechanical properties, with Br ≥ 13.12 kGs, Hcj ≥ 17.83 kOe, and bending strength ≥ 409 MPa.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B

Abstract

An RTB-based permanent magnetic material, a preparation method thereof, and an application thereof. The RTB-based permanent magnetic material comprises the following components: R': 29.5 to 33.5 wt.%, wherein R' comprises Pr, and the content of Pr is ≥ 8.85 wt.%; C: 0.106 to 0.26 wt.%; O: ≤ 0.07 wt.%; X: 0 to 5.0 wt.%, where X is one or more of Cu, Al, Ga, Co, Zr, Ti, Nb, and Mn; B: 0.90 to 1.2 wt.%; and Fe: 61.4 to 69.5 wt.%. The RTB-based permanent magnet material can improve the performance of a permanent magnet material without employing heavy rare earths. There is no need to control the content of carbon introduced in the process, and the magnet exhibits excellent performance even with a high carbon content.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• C22C 38/58 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese

Abstract

A high-Cu and high-Al neodymium iron boron magnet and a preparation method therefor. The high-Cu and high-Al neodymium iron boron magnet comprises: 29.5-33.5% R, over 0.985% B, over 0.50% Al, over 0.35% Cu, over 1% RH, and 0.1-0.4% high-melting-point elements N and Fe, wherein the percentages are the mass percentages of the elements in the total amount of elements, and the mass percentages of the element contents must satisfy the following relationships: (1)1

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

21421461361313X phases are formed in the R-T-B series permanent magnet material I, so that Hcj and mechanical performance can be synchronously improved.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

Disclosed are an R-T-B-based permanent magnet material, a preparation method therefor and the use thereof. The R-T-B-based permanent magnet material I comprises the following components: 29.0 to 32.5 wt.% of R including RH, 0.30 to 0.50 wt.% of Cu, 0.05 to 0.20 wt.% of Ti, 0.85 to 1.05 wt.% of B, 0.1 to 0.3 wt.% of C, and 66 to 68 wt.% of Fe, wherein R is a rare earth element and R at least includes Nd; and RH is a heavy rare earth element and RH at least includes Tb or Dy. A Cu-Ti-C grain boundary phase is formed in the R-T-B-based permanent magnet material I, and Hcj is significantly improved.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

Disclosed are a neodymium-iron-boron magnet material, a raw material composition, a preparation method therefor and a use thereof. The raw material composition of the neodymium-iron-boron magnet material comprises the following components by mass percentage: 29.5-32% of R', wherein R' is a rare earth element and includes Pr and Nd, and Pr ≥ 17.15%; 0.25-1.05% of Ga; 0.9-1.2% of B; and 64-69% of Fe. Without adding a heavy rare earth element to the neodymium-iron-boron magnet material, the remanence and coercive force of the resulting neodymium-iron-boron magnet material are both relatively high.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

Disclosed are a neodymium-iron-boron magnet material, a raw material composition, a preparation method therefor and a use thereof. The raw material composition of the neodymium-iron-boron magnet material comprises the following components by mass percentage: 29.5-32% of R', wherein R' is a rare earth element and includes Pr and Nd, and Pr ≥ 17.15%; Cu ≥ 0.35%; 0.9-1.2% of B; and 64-69.2% of Fe. The percentages refer to the mass percentages relative to the total mass of the raw material composition of the neodymium-iron-boron magnet material. Without the addition of a heavy rare earth element, the neodymium-iron-boron magnet material can still have a high remanence and coercive force.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

Disclosed are a neodymium-iron-boron magnet material, a raw material composition, a preparation method therefor and a use thereof. The raw material composition of the neodymium-iron-boron magnet material comprises the following components by mass percentage: 29.5-32.8% of R', wherein R' includes Pr and Nd, and Pr ≥ 17.15%; Al ≥ 0.5%; 0.90-1.2% of B; and 60-68% of Fe. The percentages are the mass percentages relative to the total mass of the raw material composition of the neodymium-iron-boron magnet material. Without adding a heavy rare earth element to the neodymium-iron-boron magnet material, the performance of the neodymium-iron-boron magnet material can still be significantly improved.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

An R-T-B permanent magnet material and a preparation method therefor and a use thereof. The R-T-B permanent magnet material comprises the following components: R', which is between 29.5 wt. % and 33.0 wt. %, the R' comprising R, Pr, and Nd, R being a rare earth element other than Pr and Nd, the Pr content being greater than or equal to 8.85 wt. %, the mass ratio of Nd to R' being less than 0.5; N, which is greater than 0.05 wt. %, and less than or equal to 4.1 wt. %, the N being Ti, Zr, or Nb; B, which is between 0.90 wt. % and 1.2 wt. %; and Fe, which is between 62.0 wt. % and 68.0 wt. %. A sintered permanent magnet product having a high coercive force and a stable temperature coefficient is prepared by using a formulation having a high Pr content. The described formulation can maximally exert the advantage of Pr, and effectively reduce production costs.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

A neodymium-iron-boron magnetic material, a preparation method therefor and an application thereof. The neodymium-iron-boron magnetic material comprises the following components in percentage by mass: 29.5-31.5wt.％ of R, where RH ＞ 1.5wt.％; 0.05-0.25wt.％ of Cu; 0.42-2.6wt.％ of Co; 0.20-0.3wt.％ of Ga; 0.25-0.3wt.％ of N; 0.46-0.6wt.％ of Al, or alternatively Al is less than or equal to 0.04wt.％ but is not 0; 0.98-1wt.％ of B; and 64-68wt.％ of Fe; wherein R is a rare-earth element and comprises Nd and RH, RH is a heavy rare-earth element and comprises Tb, and a mass ratio of Tb to Co is less than or equal to 15 but is not 0. The neodymium-iron-boron magnetic material has higher Hcj and Br, and lower absolute values of temperature coefficients of Br and Hcj.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B

Abstract

A rare earth permanent magnet material, a raw material composition, a preparation method, an application, and a motor. The present rare earth permanent magnet material comprises the following ingredients in mass percentage: R 28.5-33.0 wt.%; RH >1.5 wt.%; Cu 0-0.08 wt.%, but not 0 wt.%; Co 0.5-2.0 wt.%; Ga 0.05-0.30 wt.%; B 0.95-1.05 wt.%; and the remainder being Fe and unavoidable impurities. The R-T-B system permanent magnet material has excellent properties and, under the condition that the content of heavy rare earth elements in the permanent magnetic material is 3.0-4.5 wt.%, Br ≥12.78 kGs and Hcj ≥29.55 kOe; under the condition that the content of heavy rare earth elements in the permanent magnetic material is 1.5-2.5 wt.%, Br ≥13.06 kGs and Hcj ≥26.31 kOe.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

A neodymium iron boron permanent magnet material, and a raw material composition thereof, preparation method therefor and use thereof. The neodymium iron boron permanent magnet material contains the following components: 24.0-29.0％ Nd, 3.0-6.0％ RH, 0.1-0.3％ Cu, 1.0-4.0％ Co, 0.1-0.6％ Ga, 0.3-0.5％ Nb, 0.0-0.3％ Ti, 0.90-1.02％ B, and the remainder is FE and unavoidable impurities. The percentages refer to the mass percentages in the neodymium iron boron permanent magnet material, and RH is a heavy rare earth element. Under conditions in which Br≥1.29 T and Hcj≥1933 kA/m, the neodymium iron boron permanent magnet material achieves excellent performance in which the absolute value of a magnetic flux temperature coefficient α at a temperate interval of 20°C-100°C is less than or equal to 0.085％/°C, and can meet performance requirements for power motors, computers, electronic products and other precision instruments.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/00 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
• C22C 38/10 - Ferrous alloys, e.g. steel alloys containing cobalt
• C22C 38/14 - Ferrous alloys, e.g. steel alloys containing titanium or zirconium
• C22C 38/16 - Ferrous alloys, e.g. steel alloys containing copper

Abstract

A rare earth permanent magnet material and a raw material composition, a preparation method therefor and use thereof. The rare earth permanent magnet material comprises the following components in percentage by mass: 29.0-32.0 wt％ of R, where R comprises RH, and the content of RH is greater than 1 wt％; 0.30-0.50 wt％ of Cu (not including 0.50 wt％); 0.10-1.0 wt％ of Co; 0.05-0.20 wt％ of Ti; 0.92-0.98 wt％ of B; and the remainder being Fe and unavoidable impurities, wherein R is a rare-earth element and at least comprises Nd, and RH is a heavy rare-earth element and at least comprises Tb. The R-T-B system permanent magnet material exhibits excellent performance, wherein Br ≥ 14.30 kGs, and Hcj ≥ 24.1 kOe. The invention can synchronously improve Br and Hcj.

IPC Classes  ?

• H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
• C22C 38/16 - Ferrous alloys, e.g. steel alloys containing copper
• C22C 38/14 - Ferrous alloys, e.g. steel alloys containing titanium or zirconium
• C22C 38/10 - Ferrous alloys, e.g. steel alloys containing cobalt

Abstract

Disclosed are a device and method for continuous heat treatment of a sintered Nd-Fe-B-based magnet workpiece. The device comprises a first heat treatment chamber, a first cooling chamber, a second heat treatment chamber and a second cooling chamber which are successively and continuously arranged, and a conveying system arranged between the chambers and used for conveying the alloy workpiece or the metal workpiece, wherein the first cooling chamber and the second cooling chamber both use an air-cooling system, the temperature of cooling air inside the first cooling chamber is above 25 ℃ and differs from the temperature for heat treatment inside the first heat treatment chamber by at least 450 ℃, and the temperature of cooling air inside the second cooling chamber is above 25 ℃ and differs from the temperature for heat treatment inside the second heat treatment chamber by at least 300 ℃. The device and method for the continuous heat treatment can increase the cooling rate and the production efficiency, and improve the performance and uniformity of a product.

IPC Classes  ?

• C21D 1/00 - General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
• F27B 5/05 - Muffle furnacesRetort furnacesOther furnaces in which the charge is held completely isolated adapted for treating the charge in vacuum or special atmosphere in vacuum

Abstract

Disclosed are a device and method for continuously performing grain boundary diffusion and heat treatment, characterized in that the alloy workpiece or metal workpiece are arranged in a relatively independent treatment box together with a diffusion source; the device comprises, in successive arrangement, a grain boundary diffusion chamber, a first cooling chamber, a heat treatment chamber, a second cooling chamber, and a delivery system provided between various chambers for delivering the treatment box; each of the first cooling chamber and the second cooling chamber uses an air cooling system, and the cooling air temperature of the first cooling chamber is above 25 ºC and at least differs by 550 ºC from the grain boundary diffusion temperature of the grain boundary diffusion chamber; the cooling air temperature of the second cooling chamber is above 25 ºC and at least differs by 300 ºC from the heat treatment temperature of the heat treatment chamber; and the cooling chamber has a pressure of 50 kPa to 100 kPa. The device provided by the present invention can increase the cooling rate and production efficiency, and improve product consistency.

IPC Classes  ?

• H01L 21/67 - Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereofApparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components