HANDAN XINXING SPECIAL STEEL PIPES CO., LTD. (China)
Inventor
Liu, Zhenbao
Wang, Xiaohui
Liang, Jianxiong
Sun, Yongqing
Wang, Changjun
Yang, Zhiyong
Gao, Yuguang
Gao, Jie
Liu, Fuqiang
Zhang, Ailiang
Abstract
A hot extrusion die for a special-shaped square pipe includes a die cavity sleeve with a special-shaped cavity. A hot extrusion mandrel is arranged in the die cavity sleeve. An area between the die cavity sleeve and the hot extrusion mandrel forms a die cavity hole. A first extrusion diversion hole and a second extrusion diversion hole are arranged below the die cavity hole. An integral centroid of the die cavity hole is located at a circle center of a radial cross section of the die cavity sleeve. Further disclosed is a hot extrusion integral forming method for a special-shaped square pipe, including: heating and expanding a blank material; heating the blank material again after expanding; performing hot extrusion on the blank material; and cooling the formed special-shaped square pipe in air to a room temperature, and inspecting surface quality and mechanical properties of the special-shaped square pipe.
An electrically assisted forming process and device for a high-strength metal alloy thin-walled pipe includes a die sleeve, wiring terminals, a pulse power supply, a die seat, sealing baffle plates, a drawing die, and a cooling water circulation chamber. A process for forming a high-strength metal alloy thin-walled pipe includes first, graphite or fusible metal, i.e., an aluminum rod, is introduced into a high-strength metal alloy pipe to be drawn to fill the whole pipe; and then, pulse current is introduced into a plastic deformation area of the thin-walled pipe. A cooling device can be provided to achieve a good cooling effect. The thin-walled pipe with corresponding length is cut according to a production requirement after processing is completed, and annealing treatment is performed in a vacuum heat treatment furnace.
A high-strength stainless steel rotor and a method for preparing the same, are provided. The high-strength stainless steel rotor, including the following element components by mass percentage: C: 0.03-0.050%, Cr: 14.90-15.80%, Ni: 5.00-5.70%, Cu: 2.20-2.80%, (Nb+Ta): 0.35-0.44%, Mo: 0.45-0.54%, V: 0.06-0.10%, Si: 0.20-0.60%, Mn: 0.40-0.80%, P≤0.010%, S≤0.010%, O≤0.003%, and the balance of iron and inevitable impurities.
The present application relates to a method for statistical distribution characterization of dendritic structures in original position of single crystal superalloy, and relates to the technical field of analysis of metal material composition and microstructure, comprising the following steps: step 1, processing a to-be-tested sample and determining a calibration coefficient; step 2, obtaining a two-dimensional element content distribution map of the to-be-tested sample; and step 3, determining the number and average spacing of primary dendrites. A composition distribution region analyzed in the present application is larger than the area of a distribution region of the traditional microscopic analysis method, and the sample preparation is simple. The distribution, number and average spacing of the primary dendrites can be obtained without metallographic corrosion sampling. Therefore, the present invention has the advantages of large statistical field of view, high efficiency and complete information, and the statistical data is more accurate and reliable.
G01N 23/223 - Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups , or by measuring secondary emission from the material by irradiating the sample with X-rays or gamma-rays and by measuring X-ray fluorescence
G01N 33/204 - Structure thereof, e.g. crystal structure
5.
HIGH-STRENGTH STAINLESS STEEL ROTOR AND PREPARATION METHOD THEREFOR
The present invention relates to a high-strength stainless steel rotor and a preparation method therefor, which belong to the technical field of the hot processing of metal materials, and solve the problems of rotors in the prior art, such as low strength, a short service life, the large amount of waste of raw materials of the cutting process created during forging, and high costs. The preparation method comprises: providing a rotor stainless steel blank, carrying out first heating for the rotor stainless steel blank, carrying out free forging, and carrying out first annealing and a surface treatment after the free forging to obtain a forged blank; carrying out second heating, carrying out die forging after the second heating, and carrying out a second annealing treatment and a solid solution treatment after the die forging to obtain a forged piece; and finally, carrying out rough machining, aging treatment and finish machining on the forged piece to obtain a high-strength stainless steel rotor. By using the preparation method of the present invention, a rotor with a high strength and an excellent fatigue resistance is obtained, and the production costs incurred during the rotor preparation process are reduced.
HANDAN XINXING SPECIAL STEEL PIPES CO., LTD. (China)
Inventor
Liu, Zhenbao
Wang, Xiaohui
Liang, Jianxiong
Sun, Yongqing
Wang, Changjun
Yang, Zhiyong
Gao, Yuguang
Gao, Jie
Liu, Fuqiang
Zhang, Ailiang
Abstract
A hot extrusion die for irregularly shaped rectangular tubing comprises a die cavity sleeve (1) having an irregularly shaped cavity. A hot extrusion mandrel (2) is provided within the die cavity sleeve. A region between the die cavity sleeve and the hot extrusion mandrel constitutes an irregularly shaped rectangular tubing die cavity hole. A first extrusion flow guide hole and a second extrusion flow guide hole are provided below the irregularly shaped rectangular tubing die cavity hole. An overall centroid of the irregularly shaped rectangular tubing die cavity hole is located at a center position of a radial cross section of the die cavity sleeve. Further disclosed is a hot extrusion integral molding method for irregularly shaped rectangular tubing. The method comprises: step 1, heating a billet and reaming; step 2, re-heating the billet after the reaming; step 3, performing hot extrusion on the billet by using an irregularly shaped rectangular tubing hot extrusion die; and step 4, air cooling hot extruded irregularly shaped rectangular tubing to room temperature, and examining surface quality and mechanical properties of the irregularly shaped rectangular tubing. Irregularly shaped rectangular tubing manufactured by the method provides superior surface quality and high dimensional precision, and has performance indicators that meet design requirements and overall quality that meets industrial application requirements.
B21C 31/00 - Control devices for metal extruding, e.g. for regulating the pressing speed or temperature of metalMeasuring devices, e.g. for temperature of metal, combined with or specially adapted for use in connection with extrusion presses
cj) is up to 17 to 28.73 kOe. The magnet of the present invention has good fracture toughness which is increased by 10% to 30% as compared with the conventional Nd—Fe—B sintered magnet. The magnet of the present invention can meet needs of high-end applications such as wind power generation, new energy vehicles, and the like, and greatly expands the application fields of Ce-containing magnets.
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
The present invention discloses, a full-view-field quantitative statistical distribution representation method for microstructures of γ′ phases in a metal material, comprising the following steps: step a: labeling γ′ phases, cloud clutters and γ matrixes by Labelme, and then making standard feature training samples; step b: building a deep learning-based feature recognition and extraction model by means of BDU-Net; step e: collecting γ′ feature maps in the metal material to be detected; step d: automatically recognizing and extracting the γ′ phases; and step e: performing in-situ quantitative statistical distribution representation on the γ phases in the full view field within a large range. The full-view-field quantitative statistical distribution representation method for microstructures of γ′ phases in a metal material provided by the present invention realizes automatic, high-speed and high-quality recognition and extraction of features of γ phases in the metal material
G01N 23/2251 - Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups , or by measuring secondary emission from the material using electron or ion microprobes using incident electron beams, e.g. scanning electron microscopy [SEM]
22222222142142222 phase, wherein RE' and RE" are one or more of La, Pr, Nd, Pm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu and Y. The cerium magnet improves the diffusion efficiency of the element RE" in the diffusion source, and substantially improve the coercivity thereof.
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
10.
Method of high-throughput hot isostatic pressing micro-synthesis for the combinatorial materials and sleeve mould thereof
A sleeve mold for a method of high-throughput hot isostatic pressing micro-synthesis for combinatorial materials includes a honeycomb-array-sleeve and an upper cover, wherein a plurality of single cells are tightly arranged inside the honeycomb-array-sleeve, an exhaust tube is arranged on the upper cover, after the single cells are filled with powder materials, the upper cover is sealed welding on the honeycomb-array-sleeve, and the honeycomb-array-sleeve and the upper cover are both integrally produced by additive manufacturing. According to the method and the sleeve mold, the powder metallurgy hot isostatic pressing process is utilized to prepare small-size bulk combinatorial materials with multiple discrete components rapidly at one time.
The present invention relates to the technical field of rare-earth permanent magnet materials, and relates to a Ce-containing sintered rare-earth permanent magnet having high toughness and high coercivity, and a preparation method therefor. The described magnet is obtained by means of the steps of raw material preparation, quick setting and smelting, hydrogen decrepitation and jet milling, orientation molding, sintering and heat treatment, wherein the raw materials of the described permanent magnet comprise a principal phase alloy powder and a Ce additive phase alloy powder, the Ce additive phase being a magnetic phase or a non-magnetic liquid phase alloy; the Ce additive phase alloy accounts for 5%-30% of the total mass of the permanent magnet, the remaining being the principal phase; at the stage of jet milling, oxygen at a certain concentration is added into an inert gas, the oxygen content of the final magnet being 1500-2500 ppm. The Ce-containing dual-alloy magnet prepared according to the present invention has high coercivity, and the intrinsic coercivity thereof Hcj reaches up to 17 kOe-28.73 kOe. The magnet according to the present invention has excellent fracture toughness, and the fracture toughness value thereof is 10%-30% higher than those of traditional sintered neodymium-iron-boron magnets. The magnet according to the present invention may be used in high-end fields, such as wind power generation, new energy vehicles, and so on, greatly expanding the application fields for Ce-containing 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 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
12.
LOW-COST DIFFUSION SOURCE ALLOY, AND GRAIN BOUNDARY DIFFUSION MAGNET AND PREPARATION METHOD THEREFOR
xa1-ay100-x-y100-x-y according to the atomic percentage, wherein 0＜x≤20 and 15≤y≤99.9, and 15＜x+y≤99.9 and 0≤a≤1.0; LRE is one or more of La, Pr, Nd and Y; HRE is one or more of Tb, Dy and Ho; and M is one or more of Al, Cu, Zn, Ga, Ag, Pb, Bi and Sn. The present invention uses light rare earth elements, particularly cerium, to partially replace heavy rare earth elements, which lowers the cost of raw materials for diffusion source alloys, adjusts the melting points of diffusion source alloys, and improves the coercive force temperature coefficient of the grain boundary diffusion magnet by means of improving the diffusion efficiency of heavy rare earth elements, thus improving the high-temperature stability of the grain boundary diffusion magnet.
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
13.
Full-view-field quantitative statistical distribution characterization method of precipitate particles in metal material
The invention belongs to the technical field of the quantitative statistical distribution analysis of the features from characteristic images of microstructures and precipitated phases in metal materials, and relates to a quantitative statistical distribution characterization method of precipitate particles with the full field of view in a metal material. The method comprises the following steps of electrolytic corrosion of a metallic material specimen, automatic collection of characteristic images of microstructure, automatic stitching and fusion of the full-view-field microstructure images, automatic identification and segmentation of the precipitate particles and quantitative distribution characterization of the precipitate particles with the full field of view in a large-range scale. By establishing a mathematic model, the large-range automatic stitching and fusion of the characteristic images of the full-view-field microstructures in a characteristic region and the automatic segmentation and identification of the precipitate particles are realized; and the quantitative statistical distribution characterization information of the full-view-field morphology, quantity, size, distribution and the like of plentiful precipitated phases in a larger range is quickly obtained. The method has the features of being accurate, high-efficiency and informative in quantitative distribution characterization, as well as has much more statistical representativeness compared with conventional single-view-field quantitative image analysis.
Provided is a method for determining a quality level of an iron and steel product. The method includes: obtaining a plurality of first parameters related to a quality of an iron and steel product; fusing the plurality of first parameters to obtain a comprehensive quality evaluation parameter; and determining a quality level of the iron and steel product based on the comprehensive quality evaluation parameter.
The present invention belongs to the technical field of high throughput preparation and hot working of materials, and in particular to a high throughput micro-synthesis method of multi-component materials based on the temperature gradient field controlled by microwave energy. This invention, characterized by flexible material selection, quick temperature rising and high-efficient heating, uses microwave heating both to achieve quick preparation of small block combinatorial materials under the same temperature field in one time and to realize micro-synthesis under the different temperature gradient fields in one time including high-throughput sintering-melting and heat treatment of materials. This invention successfully overcomes drawbacks of current material preparation, such as unitary combination of components, low-efficient external heating, unique control temperature, huge material consumption and high cost during material preparation and heat treatment.
B22F 3/00 - Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sinteringApparatus specially adapted therefor
B22D 27/15 - Treating the metal in the mould while it is molten or ductile by using vacuum
C22F 1/10 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
The invention relates to a full-field statistical & characterizing method of fluid micro-explored strain for alloy microstructure, comprising the following steps: a. grinding and polishing the surface of an alloy sample to mirror with no grinding defects, and then determining a to-be-measured area on the surface of the alloy sample; b. utilizing a white light interferometry 3D surface profiler to perform initial morphology measurement on the surface of an alloy sample; c. utilizing an isostatic pressing technology to obtain the microstructure deformation on the surface of the alloy sample, and then utilizing a white light interferometry 3D surface profiler to perform deformed morphology measurement on the surface of the alloy sample to obtain a changing spectrum of micro morphology of the microstructures on the surface of the alloy; and d. performing trans-scale and rapid quantitative statistical distribution characterization on the morphology change before and after isostatic pressing of the microstructures in the to-be-measured area of the alloy, so as to obtain a corresponding full-field metallography. In the present invention, the sample pretreatment is simple, the analysis speed is rapid, the scanning area is large, and the requirement of high throughput trans-scale analysis can be satisfied, so as to instruct the extraction of the material metallography feature unit.
A back-up roll device and method for conducting corner deformation on a chamfered continuous casting slab. The back-up roll device includes back-up rolls with α-angle bevels, movable bearing seats, bearing seat moving rails, bearing seat motion holding mechanisms and inner arc or outer arc frames of a casting machine. The back-up rolls are arranged on the inner and/or outer arc frames of the horizontal segment of the casting machine. Support surfaces of the back-up rolls make contact with and squeeze smaller obtuse angles adjacent to the wide face of the inner or outer arc on the chamfered continuous casting slab, and therefore each smaller obtuse angle is squeezed into two larger obtuse angles. The back-up roll device and method for conducting corner deformation on the chamfered casting slab can achieve the purposes of eliminating edge slivers.
B22D 11/06 - Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
B22D 11/12 - Accessories for subsequent treating or working cast stock in situ
B22D 11/128 - Accessories for subsequent treating or working cast stock in situ for removing
B22D 25/02 - Special casting characterised by the nature of the product by its peculiarity of shapeSpecial casting characterised by the nature of the product of works of art
18.
Low-cost double-main-phase Ce permanent magnet alloy and its preparation method
A phase in Nd—Fe—B. The double-main-phase Ce permanent magnet alloy of the present invention prepared by using a double-main-phase alloy method greatly lowers the production cost of magnet while maintaining excellent magnetic performances.
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
H01F 1/055 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
19.
Low-neodymium, non-heavy-rare-earth and high performance magnet
H01F 1/01 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials
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
20.
Chamfered narrow side copper plate for mould with funnel-shaped curved surface
Zhong Da National Engineering and Research Center of Continuous Casting Technology Co. Ltd. (China)
Inventor
Gan, Yong
Yang, Chunzheng
Zhang, Hui
Liu, Jianhua
Wang, Mei
Wei, Gang
Wu, Yeming
Peng, Guozhong
Wang, Minglin
Liang, Hongbing
Tao, Hongbiao
Wang, Li
Xi, Changsuo
Wang, Baosheng
Ji, Xiuqin
Yuan, Luchun
Zhang, Yang
Abstract
A chamfered narrow side copper plate for a mold with a funnel-shaped curved surface has a working face contacting molten steel that includes a middle area and two chamfered areas, which are arranged at two sides. The working face has a funnel-shaped curved surface, which is larger at a top and smaller at a bottom. The chamfered narrow side copper plate for mold with funnel-shaped curved surface can ensure the uniformity of the cooling effect of the chamfered surface and enhance the service life of the narrow side copper plate.
patents
