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High-silica silicon-steel sheet heat treatment and multiple cold-rolling method

A high-silicon and plate technology, applied in the field of heat treatment process and multiple cold rolling processing, can solve the undiscovered problems such as the rolling performance of the iron-silicon system, achieve significant industrial application value, and overcome the effect that cannot be processed by rolling

Inactive Publication Date: 2004-09-15
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After extensive review of literature and patents, no relevant reports have been found on the use of the preparation technology in this invention to control the rolling performance of the iron-silicon system

Method used

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  • High-silica silicon-steel sheet heat treatment and multiple cold-rolling method
  • High-silica silicon-steel sheet heat treatment and multiple cold-rolling method
  • High-silica silicon-steel sheet heat treatment and multiple cold-rolling method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: Take a silicon-containing 6.0% iron-silicon rolling powder strip green body, the thickness is 0.36mm, and the sample size is 150×40mm, put it into a tubular sintering furnace with a flowing Ar atmosphere, and perform a sintering heat treatment , The sintering temperature is 950°C, and the sintering time is 4h. The obtained sample has an average silicon content of close to 3.0% inside the crystal grains, and still maintains good rollability due to the high silicon content on the local particle surface.

[0021] After multiple cold rolling treatments, the surface is smooth, the thickness is 0.30mm, and the density is close to 7.4g / cm 3 of samples.

[0022] Continue to put it into a tube-type sintering furnace with a flowing Ar atmosphere for secondary sintering heat treatment. The sintering temperature is 1100°C and the sintering time is 3h. The average silicon content of the obtained sample was close to 6.0%. Its surface element distribution is as follows ...

Embodiment 2

[0025] Embodiment 2: Take the green body of rolled powder strip containing silicon as 6.5% iron-silicon, the thickness is 0.40 mm, and the sample size is 200 × 60 mm, and put it into a tube with flowing Ar and H 2 A sintering heat treatment is carried out in a mixed atmosphere of 1000°C for 3 hours. The average silicon content of the obtained sample was close to 3.5%.

[0026] A sample with a thickness close to 0.25mm and high density was obtained through multiple cold rolling treatments at high pressure and low rate.

[0027] Continue to put it into a tubular sintering furnace with a flowing mixed atmosphere for secondary sintering heat treatment, the sintering temperature is 1200 ° C, and the sintering time is 5h. The average silicon content of the obtained sample was close to 6.3%. After finishing rolling with a reduction ratio of 1%, a sample with a smooth surface and uniform thickness can be obtained. Finally, stress relief annealing was carried out at 750 ° C for 40 m...

Embodiment 3

[0028] Embodiment 3: Take the green body of rolled powder strip containing silicon as 7% iron-silicon, the thickness is 0.40mm, and the sample size is 200×40mm, put it into a flow H 2 A sintering heat treatment is carried out in the atmosphere, the sintering temperature is 1050°C, and the sintering time is 5h. The average silicon content of the obtained sample was close to 4%.

[0029] The thickness is close to 0.3mm after multiple times of high-pressure cold-rolling treatment.

[0030] Continue to put through H 2 Secondary sintering heat treatment is carried out in a tube-type sintering furnace with atmosphere, the sintering temperature is 1300°C, and the sintering time is 10h. The average silicon content of the obtained sample was close to 6.7%. After finishing rolling with a reduction rate of 0.5%, samples with smooth surface and uniform thickness can be obtained. Finally, stress relief annealing was carried out at 800 °C for 30 min in a mixed atmosphere. A final sampl...

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Abstract

The invention provides a method for producing high brittleness silicon steel board by using two times of heat process and multiple tracks cold-roll adjustment compound technology in different temperature range to control the extending performance of belt material rolling. It carries on baking process to high silicon steel shin board green compact produced by powder pressing method in low temperature range, controls the content of silicon in irn particles in shin boards, the board material can maintain the malleability. It carries on multiple rolling cold process when the silicon steel board is brittled, thus controls the thickness smooth property, and compactability of board. Then carries on secondary baking processing in high temperature, thus there obtains th even silicon steel board. Finally, carries on stress adjustment and relief annealing process, thus the product can be obtained.

Description

technical field [0001] The invention relates to a heat treatment process and a method for multiple cold rolling processes. Background technique [0002] High-silicon-content iron-silicon alloys (especially with a silicon content of 6-7%) have excellent magnetic properties such as high magnetic permeability, low magnetostriction coefficient, and low core loss at high frequencies, so they can be widely used in air conditioners and refrigerators. Ferromagnetic conversion in converter systems, solar systems, tram energy systems, inverters, XRD power systems, induction heating systems, ozone generators, high-speed motors and generators, automotive components, DC converters, etc. component. Due to its low core loss performance, the ultra-miniaturization of existing equipment is possible. The low magnetostriction coefficient of the alloy can reduce the noise of the equipment during use, so the iron-silicon alloy with high silicon content is a kind of ...

Claims

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Application Information

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IPC IPC(8): C21D8/02C21D8/12
Inventor 张联盟张涛沈强李然张东明员文杰王传彬
Owner WUHAN UNIV OF TECH
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