Abstract

An electrode rod for preparing refractory high-entropy alloy powder, comprising an atomization end (1) and a fixed end (2) which are connected, the atomization end (1) being made of a refractory high-entropy alloy, and the fixed end (2) being a light metal. Connecting the refractory high-entropy alloy and the light metal to form the electrode rod can effectively reduce the weight of the whole electrode rod, thus remarkably increasing the rotating speed of rods during the preparation of refractory high-entropy alloy powder (10), and reducing the particle size of the prepared refractory high-entropy alloy powder (10); when the rotating speed of the electrode rod is increased, the refractory high-entropy alloy powder (10) having a D50 particle size of 76 μm can be prepared, thereby conveniently applying same to the fields such as metal 3D printing having higher requirements for the particle size. Further provided is a method for preparing refractory high-entropy alloy powder.

IPC Classes  ?

• B22F 9/14 - Making metallic powder or suspensions thereofApparatus or devices specially adapted therefor using physical processes using electric discharge
• B22F 5/00 - Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
• C22C 30/00 - Alloys containing less than 50% by weight of each constituent

Abstract

The present invention relates to the technical field of amorphous alloy preparation methods. Disclosed is a preparation method for titanium-based amorphous spherical powder, comprising treating a titanium-based brazing filler metal by means of plasma rotating electrode process (PREP) atomization, wherein argon and helium are used as protective gas in the PREP atomization. According to this solution, PREP atomization is used, and argon and helium are used in combination as protective gas, thereby effectively increasing the cooling speed required by titanium-based amorphous powder that can be achieved in this process and thus significantly improving the preparation success rate and purity of the titanium-based amorphous powder. By means of long-term experiments, the applicant finds that when argon and helium are used in combination as protective gas, the thermal conductivity coefficient of the mixed gas is effectively improved, so that the cooling rate is increased, and the success rate of preparing the titanium-based amorphous spherical powder by means of PREP atomization is fully improved.

IPC Classes  ?

• B22F 9/14 - Making metallic powder or suspensions thereofApparatus or devices specially adapted therefor using physical processes using electric discharge
• B22F 1/08 - Metallic powder characterised by particles having an amorphous microstructure

Abstract

A combined roller sleeve (10), a manufacturing method for the combined roller sleeve (10), and a press roller. The combined roller sleeve (10) comprises a first roller sleeve (11) and a second roller sleeve (12) which are separately formed; the first roller sleeve (11) and the second roller sleeve (12) are connected to each other; grooves are respectively formed in the connected end faces of the first roller sleeve (11) and the second roller sleeve (12); the grooves form a recess (13) at the joint of the first roller sleeve (11) and the second roller sleeve (12); first hard studs (14) are embedded in the recess (13); and gaps between the first hard studs (14) and between each first hard stud (14) and the wall of the recess (13) are filled with metal surfacing layers (15). The risk of quality defects in cast forming can be reduced; additionally, using a composite filling structure of hard studs and metal surfacing layers at the joint of the combined roller sleeve can improve not only the wear resistance of the joint of the combined roller sleeve, but also the firmness of the joint of the combined roller sleeve.

IPC Classes  ?

• B02C 4/30 - Shape or construction of rollers

Abstract

A brazing joint, a brazing method, and a device for promoting solder rheology and gas overflow are provided. The brazing joint includes a first base metal, a second base metal, and a brazing seam located therebetween. The brazing seam is formed by filling a solder in a gap formed by welding surfaces of the first and the second base metal and melting it to connect the first and the second base metal. The brazing seam is a concave-shaped brazing seam. The gap defines a first distance and a second distance, the first distance is located at an edge of the gap, the second distance is located at the edge or an inside of the gap, the first distance is greater than the second distance, and a curved surface is formed between the location of the first distance and the location of the second distance for transition.

IPC Classes  ?

• B23K 1/06 - Soldering, e.g. brazing, or unsoldering making use of vibrations, e.g. supersonic vibrations
• B23K 1/002 - Soldering by means of induction heating
• B23K 35/30 - Selection of soldering or welding materials proper with the principal constituent melting at less than 1550°C

Abstract

Copper-tin-nickel brazing material prepared by alloys recycled from E-waste, preparation method therefor, and system thereof are provided. A preparation method for the copper-tin-nickel brazing material includes the following steps: (a) spreading nano-SiO2 on the bottom of crucible and then adding a crude copper-tin-iron-nickel alloy recycled from E-waste; (b) heating the crucible to melt the crude alloy into a metal liquid so that Zn and Pb in the metal liquid react with the SiO2 to form a slag that floats out; (c) introducing a refining gas to the bottom of metal liquid in step (b), thereby removing the scums or gases formed by Pb, Fe, S, and O in the metal liquid; (d) performing heat-preserving directional solidification on the metal liquid, to bias-aggregate the Fe and Sb at one end and remove the same to obtain a copper-based intermediate alloy; and smelting and powdering the copper-based intermediate alloy.

IPC Classes  ?

• C22B 7/04 - Working-up slag
• B23K 35/02 - Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
• B23K 35/30 - Selection of soldering or welding materials proper with the principal constituent melting at less than 1550°C
• C22B 1/00 - Preliminary treatment of ores or scrap
• C22B 9/05 - Refining by treating with gases, e.g. gas flushing
• C22B 9/16 - Remelting metals
• C22B 15/00 - Obtaining copper
• C22C 3/00 - Removing material from non-ferrous alloys to produce alloys of different constitution
• C22C 9/02 - Alloys based on copper with tin as the next major constituent

Abstract

The present disclosure relates to a copper-phosphorus-zinc-tin brazing sheet and a preparation method and use thereof. The copper-phosphorus-zinc-tin brazing sheet includes a copper core layer, CuP alloy layers respectively arranged on two sides of the copper core layer, and at least two SnZn alloy layers respectively arranged on the other sides of the two CuP alloy layers away from the copper core layer.

IPC Classes  ?

• B23K 35/02 - Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
• B23K 35/30 - Selection of soldering or welding materials proper with the principal constituent melting at less than 1550°C
• C22C 9/00 - Alloys based on copper
• C22C 13/00 - Alloys based on tin

Abstract

A brazed joint, brazing method and device for promoting brazing filler metal flow and deformation and gas escape. The brazed joint comprises a first base material (100), a second base material (200) and a brazing seam (300). The brazing seam (300) is formed by using a brazing filler metal to fill a gap between a brazing surface of the first base material (100) and a brazing surface of the second base material (200) and melting the brazing filler metal to join the first base material (100) to the second base material (200), and the brazing seam (300) is a recessed brazing seam. The gap comprises a first distance (L1) and a second distance (L2), wherein the first distance (L1) is located at an edge of the gap, and the first distance (L1) is greater than the second distance (L2); and the first distance (L1) is in curved transition with the second distance (L2).

IPC Classes  ?

• B23K 1/06 - Soldering, e.g. brazing, or unsoldering making use of vibrations, e.g. supersonic vibrations
• B23K 3/00 - Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
• B23K 3/08 - Auxiliary devices therefor

Abstract

A method for reducing residual stress of a heterogeneous brazed joint. When the temperature of the brazed joint is reduced to a certain temperature, heating treatment is performed to generate micro-plastic deformation and micro-precipitation and reduce the residual stress, cooling is performed again to generate the residual stress, and then the stress is reduced by raising the temperature, so that the temperature of the joint is reduced and the residual stress of the joint is reduced in a circulating process.

IPC Classes  ?

• B23K 1/00 - Soldering, e.g. brazing, or unsoldering
• B23K 37/00 - Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass

Abstract

The present disclosure provides a copper-phosphorus-tin brazing wire and a preparation method thereof, relates to the technical field of brazing materials. The copper-phosphorus-tin brazing wire is of a three-layer structure, the inner layer is Cu, the middle layer is Cu-14P alloy, and the outer layer is Sn, wherein the mass percentage of Sn is over 7%. The present disclosure solves the technical problems in the prior art that the copper-phosphorus-silver brazing filler metal is prone to produce defects such as pores and inclusions when brazing copper alloys, which leads to the decline of the mechanical properties of the joint, and simultaneously provides the preparation method of the copper-phosphorus-tin brazing wire, such that the technical problem that it is difficult to obtain copper-phosphorus-tin brazing wire with a wire diameter below 0.5 mm under the condition of high Sn content is solved.

IPC Classes  ?

• B23K 35/02 - Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
• B23K 35/22 - Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
• B23K 35/30 - Selection of soldering or welding materials proper with the principal constituent melting at less than 1550°C
• B23K 35/365 - Selection of non-metallic compositions of coating materials either alone or conjoint with selection of soldering or welding materials
• B23K 35/40 - Making wire or rods for soldering or welding
• B32B 1/08 - Tubular products
• B32B 7/02 - Physical, chemical or physicochemical properties
• B32B 15/01 - Layered products essentially comprising metal all layers being exclusively metallic
• B32B 15/02 - Layered products essentially comprising metal in a form other than a sheet, e.g. wire, particles
• B32B 15/04 - Layered products essentially comprising metal comprising metal as the main or only constituent of a layer, next to another layer of a specific substance
• B32B 15/20 - Layered products essentially comprising metal comprising aluminium or copper
• C22C 9/00 - Alloys based on copper
• C22C 9/02 - Alloys based on copper with tin as the next major constituent
• C23C 2/08 - Tin or alloys based thereon
• C23C 2/38 - WiresTubes
• C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
• C23C 28/02 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and only coatings of metallic material
• C23C 30/00 - Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process

Abstract

The present disclosure relates to the field of brazing material technologies, and particularly to a copper-phosphorus brazing wire for brazing a copper alloy spectacle frame as well as a preparing method and system thereof. The copper-phosphorus brazing wire for brazing a copper alloy spectacle frame includes components with following mass percentage, 87.1%˜91.4% of Cu, 1.5%˜2.6% of Ag, 5.9%˜8.4% of P, 0.2%˜0.42% of Al and 0.8%˜1.68% of Si. For the copper-phosphorus brazing wire according to the present disclosure, through coordination and cooperation of the components, impurity content is low and joint strength is high in a welding process; a mass ratio of the Si to the Al is a constant value, and a dense oxide film may be formed on a surface of a molten pool to hinder volatilization of Zn in a base material.

IPC Classes  ?

• B23K 35/02 - Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
• B23K 35/30 - Selection of soldering or welding materials proper with the principal constituent melting at less than 1550°C
• B23K 35/40 - Making wire or rods for soldering or welding
• C22C 9/00 - Alloys based on copper
• C22F 1/08 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
• B23K 101/24 - Frameworks

Abstract

The present disclosure provides a copper-phosphorus brazing foil and a preparation method thereof, which relates to the technical field of brazing material. It comprises a copper inner core and a copper-phosphorus alloy layer coating outside the copper inner core, wherein the phosphorus content in the copper-phosphorus brazing foil is over 5 wt %, and the thickness of the copper-phosphorus brazing foil is below 0.5 mm. In the present disclosure, red copper foil is used as the core layer, and the surface of the red copper foil is alloyed with a layer of copper-phosphorus alloy by the eutectic reaction between the core layer and red phosphorus, such that the copper-phosphorus brazing foil is obtained. The present disclosure prepares a copper-phosphorus brazing foil with high phosphorus content and lower thickness. Comparing with the traditional preparation method, the preparation method of the present disclosure has high efficiency and high yield.

IPC Classes  ?

• B23K 35/02 - Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
• B23K 35/30 - Selection of soldering or welding materials proper with the principal constituent melting at less than 1550°C
• B23K 35/40 - Making wire or rods for soldering or welding

Abstract

A high-activity flux-cored brazing filler metal for improving the brazing strength between heterogeneous materials, and a preparation method. The flux-cored brazing filler metal comprises a flux core and a skin at least partially covering the surface of the flux core. The skin comprises: 30-55 parts by mass of silver; 25-50 parts by mass of copper; 20-45 parts by mass of zinc; and 1.5-2.5 parts by mass of cobalt. The skin further comprises: 0.2-0.7 parts by mass of germanium; and/or 0.2-0.7 parts by mass of silicon; and/or 0.1-0.3 parts by mass of an active metal. The active metal comprises at least one of titanium, chromium, and zirconium. The flux core comprises a silver-based brazing flux; and the flux core further comprises aluminum and/or silicon.

IPC Classes  ?

• B23K 35/365 - Selection of non-metallic compositions of coating materials either alone or conjoint with selection of soldering or welding materials
• B23K 35/40 - Making wire or rods for soldering or welding

Abstract

A braze coating material with a nickel core and a coating, a preparation method thereof, and a braze coating method are provided. The braze coating material with a nickel core and a coating requires no binder and has strong adhesion ability, and includes the nickel core, a coating layer, a hardened layer, and a protective layer sequentially from inside to outside. The nickel core is metallic nickel having a surface subjected to a roughening treatment. The coating layer is a first brazing flux layer including hard particles, a first brazing flux, and a brazing filler metal powder. The hardened layer contains a second brazing flux and is covered with the protective layer mainly composed of a silicate.

IPC Classes  ?

• B23K 35/365 - Selection of non-metallic compositions of coating materials either alone or conjoint with selection of soldering or welding materials
• B23K 35/30 - Selection of soldering or welding materials proper with the principal constituent melting at less than 1550°C
• B23K 35/36 - Selection of non-metallic compositions, e.g. coatings, fluxesSelection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
• B23K 35/40 - Making wire or rods for soldering or welding

Abstract

A copper-tin brazing wire and a preparation method and use thereof are provided. A copper-tin brazing wire includes a plurality of copper wires each having a composite metal layer on a surface thereof; the copper-tin brazing wire includes, in parts by weight, 75-84 parts of Cu, 20-25 parts of Sn, and 0.4-0.5 parts of P; and the composite metal layer includes Cu, Sn, and P, in which a mass ratio of Cu, Sn, and P is (45-55):(46-56):(0.5-1.5).

IPC Classes  ?

• B23K 35/02 - Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
• B23K 35/30 - Selection of soldering or welding materials proper with the principal constituent melting at less than 1550°C
• B23K 35/40 - Making wire or rods for soldering or welding
• C22C 9/02 - Alloys based on copper with tin as the next major constituent

Abstract

A preparation process for a multi-component spherical alloy powder. Plasma rotation electrode process is used to prepare a multi-component spherical alloy powder, the alloy powder comprising at least one of a refractory metal and a compound thereof, which specifically comprises tungsten, molybdenum, tantalum, niobium, rhenium, tungsten carbide, tantalum carbide, etc. The prepared multi-component spherical alloy powder exhibits a high degree of sphericity, good flowability, and a high tap density, and has few impurity elements and a low yield of particles having internal pores and satellite-feature particles. Compared with those prepared by means of other preparation methods, the prepared alloy powder exhibits more excellent performance and is an ideal material for metal 3D printing. Also solved is a problem of difficulty in preparing a base material round bar of a refractory metal or of a compound thereof used in plasma rotation electrode process. Also provided is a spatial structure interweaving method or an element direct mixing method or a porous skeleton method for preparing a multi-component alloy rod.

IPC Classes  ?

• B22F 9/14 - Making metallic powder or suspensions thereofApparatus or devices specially adapted therefor using physical processes using electric discharge
• B22F 1/065 - Spherical particles
• 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
• B22F 3/14 - Both compacting and sintering simultaneously
• B22F 3/11 - Making porous workpieces or articles
• B22F 5/10 - Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups

Abstract

A method for flux-free soldering of aluminum alloy, comprising the following steps: (1) galvanizing a surface to be soldered of aluminum alloy to form a galvanized layer; (2) coating the galvanized layer with a flux-free solder paste, the flux-free solder paste consisting of a binder and the following components in parts by weight: 70-80 parts of a zinc-aluminum solder and 6.0-8.0 parts of rubidium-iron-boron magnetic particles; and (3) heating a part to be soldered, so that the galvanized layer and the zinc-aluminum solder form a eutectic or near-eutectic solder liquid, and applying a rotating magnetic field, so that the rubidium-iron-boron magnetic particles spin under the action of the rotating magnetic field and aluminum alloy is soldered and connected in the absence of a flux. In the method, a galvanized layer and a solder layer are diffused under the action of a concentration gradient, and then flux-free soldering of aluminum alloy is achieved under the action of spin-breaking and flow promoting of strong magnetic particles; a resulting soldering joint has fewer inclusion and air hole defects, a dense soldering seam, and high joint strength. Also disclosed is a solder paste for flux-free soldering.

IPC Classes  ?

• B23K 3/06 - Solder feeding devicesSolder melting pans
• B23K 1/002 - Soldering by means of induction heating

Abstract

Disclosed is a braze paste for fluxless brazing of stainless steel. The braze paste is mainly composed of water, sodium silicate, nanosilicon dioxide and a copper-based braze material. The braze paste is prepared from the following raw materials in parts by weight: 70-80 parts of a copper-based braze material, 3-5 parts of nanosilicon dioxide, 1-3 parts of sodium hydroxide, and 10-15 parts of water. According to the braze paste, the paste comprising water, sodium silicate, and nanosilicon dioxide is dehydrated at a high temperature during brazing to form a thin film, wherein the nanosilicon dioxide can construct a three-dimensional network structure that has a large surface area and great activity and would enhance the strength and high temperature resistance of the thin film, so that a high-temperature-resistant thin film is formed. The thin film isolates air, protects a surface to be brazed and a molten braze material from being oxidized, and achieves fluxless brazing of stainless steel in an atmospheric environment; in addition, nanosilicon dioxide particles are pinned in a brazing seam and also facilitate the enhancement of the strength of a stainless steel joint. Also disclosed are a preparation method for a braze paste, an application, and a copper-manganese-nickel-cobalt braze material.

IPC Classes  ?

• B23K 35/30 - Selection of soldering or welding materials proper with the principal constituent melting at less than 1550°C
• B23K 35/40 - Making wire or rods for soldering or welding
• B23K 35/02 - Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
• C22C 9/00 - Alloys based on copper

Abstract

A brazing wire includes a brazing tube having an inner cavity and a flux filled in the inner cavity. A trench is provided on an outer peripheral surface of the brazing tube, and the trench extends along an axis of the brazing tube or spirally extends around the axis. A forming mold of the brazing wire includes a mold body having a molding cavity therein. An inner wall of the molding cavity is provided with a protrusion. When the brazing wire passes through the forming mold, the protrusion is used to form the trench. The forming method of the brazing wire includes the following steps. The brazing tube passes through the forming mold, and the trench is formed on the outer peripheral surface of the brazing tube by the protrusion. The trench extends along the axis of the brazing tube or spirally extends around the axis.

IPC Classes  ?

• B23K 35/02 - Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
• B21C 1/02 - Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums

Abstract

The present disclosure provides a device and method for manufacturing a coated welding rod. The device for manufacturing a coated welding rod includes a grabbing device, a heating device, and a flux storage device. The heating device is configured to heat a welding rod in the grabbing device. A flux in granular form is stored in the flux storage device, the grabbing device is configured to transport the heated welding rod into the flux storage device, and the heated welding rod is configured to heat the flux surrounding the welding rod into a viscous glassy state so that the flux in the viscous glassy state adheres to the surface of the welding rod. The heated welding rod enables the granular flux to be formed into a viscous glassy state so that the flux can be adhered directly to the surface of the welding rod.

IPC Classes  ?

• B05C 3/09 - Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating separate articles
• B05C 9/14 - Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by groups , or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation involving heating
• B05C 11/10 - Storage, supply or control of liquid or other fluent materialRecovery of excess liquid or other fluent material
• B23K 35/40 - Making wire or rods for soldering or welding
• B23K 35/365 - Selection of non-metallic compositions of coating materials either alone or conjoint with selection of soldering or welding materials
• B23P 15/00 - Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
• B05C 13/02 - Means for manipulating or holding work, e.g. for separate articles for particular articles

Abstract

Disclosed is a device for manufacturing a coated electrode (100), the device comprising: a gripping device (300), a heating device (400) and a brazing flux storage device (500). The heating device is configured to heat an electrode in the gripping device; the brazing flux storage device stores granular brazing flux, the gripping device is configured to deliver the heated electrode into the brazing flux storage device, and the heated electrode is configured to heat the brazing flux around the electrode to a viscous glassy state, such that the brazing flux in the viscous glassy state adheres to the surface of the electrode. The heated electrode can form the granular brazing flux into the viscous glassy state, such that the brazing flux can directly adhere to the surface of the electrode without using an organic binding agent, thus reducing environmental pollution, and ensuring the effectiveness, the reliability and the service life of a weld joint. A method for manufacturing a coated electrode is further disclosed.

IPC Classes  ?

• B23K 35/40 - Making wire or rods for soldering or welding

Abstract

A controller (16), and a method and device (1) for detecting a filling rate of a flux-cored welding wire. The method for detecting a filling rate of a flux-cored welding wire comprises: acquiring the actual deflection when a bendable part (21) of a flux-cored welding wire (2) is bent to reach a preset curvature (S500); comparing the actual deflection with a preset deflection range (S501); and determining, according to a comparison result, whether an actual filling rate of the bendable part (21) is within a preset range (S502). By means of the method for detecting a filling rate of a flux-cored welding wire, whether a filling rate of a flux-cored welding wire (2) is within a preset range can be detected without peeling off the flux-cored welding wire (2), such that the production efficiency can be effectively improved, and the wastage of materials is also reduced.

IPC Classes  ?

• G01N 3/20 - Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces

Abstract

A flux-cored brazing filler material and a preparation method therefor, and an apparatus for preparing the flux-cored brazing filler material. The preparation method for the flux-cored brazing filler material comprises the following steps: adding a liquid flux to a butt joint flux-cored brazing filler material, and then performing drying, wherein the preparation of the butt joint flux-cored brazing filler material comprises: filling a U-shaped brazing filler strip with a solid flux, and then press forming the butt joint flux-cored brazing filler material.

IPC Classes  ?

• B23K 35/40 - Making wire or rods for soldering or welding

Abstract

A multilayered flux-cored silver brazing material, comprising an inner core layer, an intermediate layer attached to the surface of the inner core layer, and an outermost layer wrapped on the intermediate layer, the inner core layer being an alloy wire (1), the intermediate layer being a silver flux layer (2), the outermost layer being a silver-based brazing metal skin (3), and the melting point of the alloy wire being lower than that of the silver flux layer. Also provided is a production method for the multilayered flux-cored silver brazing material. In the multilayered flux-cored silver brazing material, the melting temperature of the core alloy wire is lower than that of the flux; in a brazing process, the alloy wire first melts and then adheres to the flux, so as to cause the flux to flow out into a brazing seam in advance, thereby improving the seam filling performance and flowability of the brazing material, and solving the problems of poor fluidity, difficulty in passing through the seam, and brazing material accumulation on the front brazing side during brazing using conventional flux-cored silver brazing materials, thus improving the brazing effect.

IPC Classes  ?

• B23K 35/14 - Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape not specially designed for use as electrodes for soldering
• B23K 35/16 - Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape not specially designed for use as electrodes of non-circular cross-sectionRods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape not specially designed for use as electrodes with special arrangement, e.g. internal
• B23K 35/30 - Selection of soldering or welding materials proper with the principal constituent melting at less than 1550°C
• B23K 35/40 - Making wire or rods for soldering or welding

Abstract

A brazing wire, comprising: a brazing material tube (11) and a brazing agent (12). The brazing material tube is provided with an inner cavity, and the brazing agent is filled in the inner cavity of the brazing material tube. Grooves (13) are provided on the outer circumferential surface of the brazing material tube, and the grooves extend along the axis of the brazing material tube or spirally extend around the axis of the brazing material tube. Further provided is a brazing-wire forming die, comprising a die body (21), a forming cavity (22) being provided in the die body, and the inner wall of the forming cavity being provided with protrusions (23). Further provided is a brazing wire forming method. The brazing wire is passed through the forming die, and the protrusions provided on the inner wall of the forming cavity are used to form grooves on the outer circumferential surface of the brazing material tube. The arrangement of the grooves can increase the rate of melting of the brazing agent of the brazing wire, reducing brazing flow time, and improving brazing quality.

IPC Classes  ?

• B23K 35/02 - Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
• B23K 35/40 - Making wire or rods for soldering or welding

Abstract

A brazing material outer coat and a method for preparing the same, an in-situ synthetic metal-coated flux-cored silver brazing material and a method for preparing the same, a welding method and a joint body, wherein the in-situ synthetic metal-coated flux-cored silver brazing material comprises a flux core and a brazing material outer coat wrapping the flux core, the brazing material outer coat comprises, in percentage by weight: silver Ag 20.0˜36.0%, copper Cu 35.0˜45.0%, zinc Zn 27.0˜37.0%, tin Sn 1.0˜3.0%, phosphorus P 0.1%˜0.5%, nickel Ni 0.5˜2.0%, germanium Ge 0.1˜0.3%, and lithium Li 0.1˜0.3%, the flux core comprises, in percentage by weight: elemental boron micropowder 5.0˜10.0%, sodium borohydride 5.0˜10.0%, potassium fluoroborate 15.0˜30.0%, boric anhydride 25.0˜40.0%, sodium fluoride 10.0˜30.0%, sodium bifluoride 2.0˜4.0%, and copper sulfate 1.0˜5.0%. The in-situ synthetic metal-coated flux-cored silver brazing material in the present disclosure realizes self-reaction in a brazing process to coat a layer of copper film on a surface of a brazed metal, the core of the brazing material has good wettability, good flowability, self-brazing function, and zinc being hard to volatilize, the flux coat has high activity, low hygroscopicity, few carbon residues, good plasticity and toughness, etc. The present disclosure is particularly suitable for brazing pipeline components of stainless steel, manganese brass and so on.

IPC Classes  ?

• B23K 35/00 - Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
• B23K 1/20 - Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
• B23K 35/02 - Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
• B23K 35/30 - Selection of soldering or welding materials proper with the principal constituent melting at less than 1550°C
• B23K 35/362 - Selection of compositions of fluxes
• B23K 101/32 - Wires
• B23K 103/12 - Copper or alloys thereof
• B23K 101/06 - Tubes

Abstract

An in-situ synthesized metallic coated flux-cored silver solder, comprising: a flux core (1), and a solder outer skin (2) wrapping the flux core. The solder outer skin comprises, by weight: 20.0-36% of Ag, 35.0-45.0% of Cu, 27.0-37.0% of Zn, 1.0-3.0% of Sn, 0.1-0.5% of P, 0.5-2.0% of Ni, 0.1-0.3% of Ge, and 0.1-0.3% of Li. The flux core comprises, by weight: 5.0-10.0% of elementary boron micro powder, 5.0-10.0% of sodium borohydride, 15.0-30.0% of potassium fluoroborate, 25.0-40.0% of boric anhydride, 10.0-30.0% of sodium fluoride, 2.0-4.0% of sodium hydrogen fluoride, and 1.0-5.0% of copper sulfate. The in-situ synthesized metallic coated flux-cored silver solder enables self-reaction in a soldering process, coating a copper layer on a soldered metal surface. The solder core has good wettability and flowability, a self-fluxing action, and not-easily-vaporized zinc. The fluxed skin has high activity, low moisture absorption, low carbon residue, good plastic strength, and is suitable for soldering pipe components such as stainless steel or manganese bronze components. Also disclosed are a solder outer skin and a preparation method thereof, an in-situ synthesized metallic coated flux-cored solder and a preparation method thereof, a soldering method, and a connector.

IPC Classes  ?

• B23K 35/14 - Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape not specially designed for use as electrodes for soldering
• B23K 35/363 - Selection of compositions of fluxes for soldering or brazing
• B23K 35/40 - Making wire or rods for soldering or welding
• B23K 35/24 - Selection of soldering or welding materials proper

Abstract

It discloses a high-efficient energy-saving and surfacing layer well-forming self-shielded flux-cored welding wire. A low-carbon steel strip is used as an outer cover, and a flux core comprises the following components in percentage by mass: 42-60% high carbon ferrochrome with a particle size of 80 meshes, 10-18% ferrosilicon, 16-25% ferroboron, 2-8% rare earth silicon, 2-8% graphite, 1-4% aluminum magnesium alloy, 2-5% manganese powder and the balance of iron powder, wherein the graphite, the aluminum magnesium alloy and the manganese powder are all added with two particle sizes including 60 meshes and 200 meshes, and the weight of the flux core powder accounts for 49-53% of the total weight of the welding wire.

IPC Classes  ?

• B23K 35/30 - Selection of soldering or welding materials proper with the principal constituent melting at less than 1550°C
• B23K 35/02 - Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
• B23K 35/40 - Making wire or rods for soldering or welding