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Process for preparing high silicon stalloy by pack siliconizing process

An electrical steel sheet, embedding and infiltration technology, applied in the direction of metal material coating process, coating, solid diffusion coating, etc., can solve the problems of reducing elongation, restricting the production and processing of high-silicon steel, and achieving the solution to technological difficulties. Effect

Inactive Publication Date: 2009-01-21
BEIHANG UNIV
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AI Technical Summary

Problems solved by technology

However, as the silicon content in steel increases, its ductility decreases, which limits the production and processing of high silicon steel to a large extent.

Method used

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  • Process for preparing high silicon stalloy by pack siliconizing process
  • Process for preparing high silicon stalloy by pack siliconizing process

Examples

Experimental program
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Effect test

Embodiment 1

[0034] 80g siliconizing agent consists of 3g of sodium fluoride NaF, 9g of silicon Si powder (Si powder particle size 200 mesh) and 68g of aluminum oxide Al 2 o 3 composition, and put the prepared siliconizing agent into an oven at 100°C for 1 hour, to be used;

[0035] Select two non-oriented "EI" type 0.5mm thick low-silicon steel sheets with a silicon content of 0.5%, and polish them, put them in alcohol, store them for 1 hour, take them out, dry them with cold wind, and set them aside;

[0036] Put 10g of siliconizing agent into the bottom of the crucible, then put a piece of low-silicon steel sheet, and sprinkle 10g of siliconizing agent evenly around and above it; then put another piece of low-silicon steel sheet, and fill it evenly around and above The rest of the siliconizing agent is put into the heat treatment furnace after covering and strengthening the crucible lid;

[0037] Infuse protective gas - argon for 10 minutes;

[0038] Adjust the heating rate of the he...

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Abstract

The invention discloses a high silicon electric steel producing method with pack cementation silicon technology, which comprises the following steps: imbedding low silicon sheet iron with silicon content of 0. 3-1. 0wt% in ihrigizing agent; obtaining high silicon electric steel with silicon content of 6. 5% of low loss, low hysteresis extension coefficient and low coercivity by controlling technological parameter of chemical heat treatment. The craft comprises the following steps: covering the bottom of crucible with part of formulated ihrigizing agent; putting low silicon sheet iron which surface processed in crucible; filling-in excess ihrigizing agent around crucible; charging argon gas; adjusting heating-up speed at 17- 20deeg. c / min; heating up to 1000-1250deg. c; keeping temperature; carrying on diffusing heat treatment at heating-up speed of 6-8deg. c / min after keeping temperature at 1150-1350deg. c for 1. 5-4. 5 hours.

Description

technical field [0001] The present invention relates to a preparation method of high-silicon electrical steel sheet, more particularly, the low-silicon steel sheet with a silicon content of 0.3-0.45% is embedded in a siliconizing agent, and at the same time, the process parameters of chemical heat treatment are effectively controlled , so as to obtain a high-silicon electrical steel sheet with a silicon content of about 6.5% with low loss, low hysteresis expansion coefficient, and low coercive force. Background technique [0002] Silicon steel sheet is the main core material for processing high-speed induction motors. In order to produce high-speed induction motors with high efficiency, small size and low noise, the silicon content in silicon steel sheets has a great influence on the magnetic induction and iron loss characteristics of the iron core material. influences. Relevant studies have shown that with the increase of silicon content in silicon steel sheet, the inheren...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C10/46
Inventor 毕晓昉卢凤双
Owner BEIHANG UNIV
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