A kind of preparation method of high-performance high-alumina silicon steel

A high-alumina-silicon, high-performance technology, applied in the field of powder metallurgy, can solve problems such as unstable performance and low yield, and achieve the effects of improving product quality and yield, high production efficiency, and reducing iron loss

Active Publication Date: 2021-11-26
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the 1980s and 1990s, my country has done some research on adding a small amount of phosphorus to low-silicon steel. Although some achievements have been made, most of them are still in the stage of laboratory research. Low performance and unstable performance have not been promoted and used

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0030] (1) 30μm gas atomized Fe-3.2wt.%Si powder, 10μm gas atomized aluminum and 20μm 25wt.%P-Fe alloy powder were prepared according to Fe-3wt.%Si-4wt.%Al-0.1wt. %P is used for batching, and a rolling ball mill is used for ball milling and mixing, the ratio of ball to material is 2:1, and the mixture is mixed for 3.5 hours to make mixed powder;

[0031] (2) The mixed powder is annealed in a vacuum high-temperature furnace, and heated at 350° C. for 2 hours to fully remove the stress generated by work hardening. ;

[0032] (3) A 40° inclined rolling mill is used, and the friction force between the roll and the powder is used to feed the material, and the thickness of the rolled green sheet is 2.3mm, the width is 160mm, and the density is 6.1g / cm 3 ;

[0033] (4) vacuum sintering the green sheet at 1150° C. for 4 hours to achieve metallurgical bonding and element diffusion homogenization to obtain a sintered slab;

[0034] (5) After heating the above-mentioned sintered slab ...

Embodiment example 2

[0038] (1) 60μm gas-atomized Fe-4.7wt.%Si powder, 8μm gas-atomized aluminum powder and 15μm 40wt.%P-Fe alloy powder according to Fe-4.5wt.%Si-3.5wt.%Al- 0.2wt.% P is used for batching, and the ball-milling mixing is carried out with a rolling ball mill, and the ratio of the balls to the material is 2:1, and the mixture is mixed for 5 hours to prepare a mixed powder;

[0039] (2) The mixed powder is annealed in a vacuum high-temperature furnace, and heated at 400° C. for 3 hours to fully remove the stress generated by work hardening. ;

[0040] (3) Using a 60° inclined rolling mill, the friction force between the roll and the powder is used to feed the material, and the thickness of the rolled green sheet is 2.0mm, the width is 240mm, and the density is 6.32g / cm 3 ;

[0041] (4) vacuum sintering the green sheet at 1180° C. for 3 hours to achieve metallurgical bonding and element diffusion homogenization to obtain a sintered slab;

[0042] (5) After heating the above-mentione...

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Abstract

The invention discloses a method for preparing high-performance high-alumina silicon steel, which belongs to the technical field of powder metallurgy. The invention uses gas-atomized ferrosilicon powder, aluminum powder and ferrophosphorus powder as raw materials, obtains Fe-Si-Al-P mixed powder after full ball milling and mixing, and forms a green thin plate by powder rolling after vacuum annealing , through high-temperature sintering to make it metallurgically bonded, multi-pass hot-rolled to a certain thickness, then cold-rolled 2‑5 times, and finally high-temperature annealed to obtain high-alumina silicon steel sheets with excellent properties. The present invention introduces Al and P elements into the Fe-Si system, which can effectively improve the soft magnetic performance parameters of the material, and use the Al powder with good ductility to improve the formability of the system, ensure powder rolling forming, and have the advantages of operation Simple, high production efficiency, high product precision, no pollution and inclusions, excellent performance and other advantages.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, and relates to a preparation method of high-performance high-alumina silicon steel. Background technique [0002] Silicon steel is an important magnetic material used in the manufacture of generators, motors, transformers, relays, transformers and other electrical instruments in the electric power, electronics and telecommunication industries. It is one of the metal functional materials with the largest output. The performance of silicon steel is superior to that of iron, and it has the advantages of high resistivity (several times that of electrical pure iron), low eddy current loss, high saturation magnetic induction intensity, low price and good stability. soft magnetic material. With the increase of silicon content in the silicon steel sheet, the resistivity and magnetic permeability can be increased, the coercive force and magnetostriction coefficient can be reduced, and the eddy ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/10C22C33/02C22C38/02C22C38/06B22F1/00B22F3/18
CPCC22C33/0264C22C38/02C22C38/06C22C38/002B22F3/18B22F3/1007B22F3/24B22F9/04B22F2003/248B22F2009/043B22F1/142
Inventor 杨芳秦乾陈明训郭志猛陈存广邵艳茹魏家树李沛汪豪杰
Owner UNIV OF SCI & TECH BEIJING
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