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Method for preparing high-silicon steel by powder sleeve forming

A high-silicon steel and wrapping technology, which is applied in the field of powder wrapping forming to prepare high-silicon steel, can solve the problems of complex equipment, high cost, environmental pollution, etc., and achieves short processing process flow, high production efficiency and yield, and low production cost. Effect

Active Publication Date: 2015-10-07
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods generally have problems such as long preparation process, complex equipment, environmental pollution, low efficiency, high cost, difficulty in achieving large-scale production, and difficulty in meeting the requirements of product quality.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] According to the mass percent ratio of iron and silicon of 93.5:6.5, the mass percent content of silicon is 99.99%, and the high-purity silicon powder with a particle size of about 50 μm is directly packed into the iron mass percent content of 99.7%, In an electrical pure iron pipe with an outer diameter of 10mm and an inner diameter of 4.6mm, 18 passes of room temperature drawing were performed to obtain a primary composite wire with a diameter of 2.9mm; followed by annealing temperature of 700°C, holding time of 3h, and argon protection Under the condition of the atmosphere, the primary composite wire is annealed; a primary composite wire after the annealing treatment is directly placed in an electrical pure iron pipe with an iron mass percentage of 99.7%, an outer diameter of 10mm, and an inner diameter of 6mm. According to the ratio of iron to silicon mass percentage of 93.5:6.5, the gap between the primary composite wire and the electrical pure iron pipe is filled w...

Embodiment 2

[0019]According to the mass percent ratio of iron and silicon of 93.5:6.5, the mass percent content of silicon is 99.99%, and the high-purity silicon powder with a particle size of about 50 μm is directly packed into the iron mass percent content of 99.7%, In an electrical pure iron pipe with an outer diameter of 10mm and an inner diameter of 4.6mm, 18 passes of room temperature drawing were performed to obtain a primary composite wire with a diameter of 2.9mm; followed by annealing temperature of 700°C, holding time of 3h, and argon protection Under the condition of the atmosphere, the primary composite wire is annealed; a primary composite wire after the annealing treatment is directly placed in an electrical pure iron pipe with an iron mass percentage of 99.7%, an outer diameter of 10mm, and an inner diameter of 6mm. According to the ratio of iron to silicon mass percentage of 93.5:6.5, the gap between the primary composite wire and the electrical pure iron pipe is filled wi...

Embodiment 3

[0021] According to the mass percent ratio of iron and silicon of 93.5:6.5, the mass percent content of silicon is 99.99%, and the high-purity silicon powder with a particle size of about 50 μm is directly packed into the iron mass percent content of 99.7%, In an electrical pure iron pipe with an outer diameter of 10mm and an inner diameter of 4.6mm, 18 passes of room temperature drawing were performed to obtain a primary composite wire with a diameter of 2.9mm; followed by annealing temperature of 700°C, holding time of 3h, and argon protection Under the condition of the atmosphere, the primary composite wire is annealed; a primary composite wire after the annealing treatment is directly placed in an electrical pure iron pipe with an iron mass percentage of 99.7%, an outer diameter of 10mm, and an inner diameter of 6mm. According to the ratio of iron to silicon mass percentage of 93.5:6.5, the gap between the primary composite wire and the electrical pure iron pipe is filled w...

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Abstract

The invention provides a method for preparing high-silicon steel by powder sleeve forming, which is characterized by comprising the following steps: directly sleeving a siliceous powder or precompacted siliceous powder material in a sleeve metal, and carrying out extrusion, drawing or roll forming to obtain a primary composite; sleeving a plurality of primary composites into the sleeve metal, and continuing extrusion, drawing or roll forming to obtain a secondary composite; circulating the sleeving and forming process like this to obtain the final composite; and carrying out subsequent vacuum or protective atmosphere diffusing heat treatment to obtain the high-silicon steel. The method has the advantages of high production efficiency, high yield, short subsequent processing process, energy saving, consumption reduction, environment friendliness, low production cost and the like, and is beneficial to large-scale mass production of high-quality high-performance multi-size multi-species high-silicon steel with different silicon contents and different components.

Description

technical field [0001] The invention belongs to the technical field of metal material preparation, and in particular provides a method for preparing high-silicon steel by powder wrapping molding. Background technique [0002] Silicon steel (also known as electrical steel) is a type of magnetic material with the largest output and consumption. It is mainly used as the iron core and other electrical components of various motors, generators and transformers. It is an indispensable and important material in the fields of electric power, electronics and military industry. soft magnetic alloy. [0003] According to the mass percentage of silicon, silicon steel can be divided into low-silicon silicon steel (0.8-1.8% Si), medium-silicon silicon steel (1.8-2.8% Si), high-silicon silicon steel (2.8-3.8% Si) and high-silicon silicon steel (3.8-6.5% Si), the mass percentage content of silicon in the silicon steel that has been researched relatively maturely and has been mass-produced i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/02B22F3/20
Inventor 刘雪峰王林谢建新
Owner UNIV OF SCI & TECH BEIJING
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