Method for improving magnetic characteristics of orientated silicon steel by heat treatment of pulse electric field

A technology of oriented silicon steel and pulsed electric field, applied in the field of material science and engineering research, can solve problems such as technical difficulty and limited enterprises, and achieve the effects of simple operation, stable effect and small damage area

Inactive Publication Date: 2011-07-20
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Oriented silicon steel is widely used in the electric power and electronics industries, and is used as the iron core material in transformers and motors. It needs to have good magnetic properties. However, due to the technical difficulty, the enterprises that can produce it are extremely limited at present.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Example 1: When the frequency is 9Hz, the voltage is 500V, the processing time is 6min, and the annealing temperature is 650°C. oriented silicon steel sheet P 17 / 50 reduced by 13.18%, while making it B 8 An increase of 6.61%.

Embodiment 2

[0011] Example 2: when the frequency is 9Hz, the voltage is 500V, the treatment time is 3min, and the annealing temperature is 650°C. oriented silicon steel sheet P 17 / 50 reduced by 8.7%, while making it B 8 An increase of 5.15%.

Embodiment 3

[0012] Example 3: when the frequency is 15 Hz, the voltage is 500 V, the treatment time is 3 min, and the annealing temperature is 650° C. oriented silicon steel sheet P 17 / 50 reduced by 1.84%, while making it B 8 An increase of 9.6%.

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PUM

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Abstract

The invention belongs to the fields of material science and engineering research, and mainly relates to a method for improving the magnetic characteristics of orientated silicon steel by a pulse electric field. The method for improving the magnetic characteristics of orientated silicon steel by heat treatment of a pulse electric field comprises the following steps of: adopting an electric pulse modification (EPM)-C type electric pulse generator for the annealing test, wherein a lead wire is directly connected with two ends on one side of a sample and is protected by a high purity corundum protecting tube; annealing in a box resistance furnace, adopting gas atmosphere protection, heating an oriented silicon steel sheet from the room temperature to the required annealing temperature, insulating for a period of time, treating the oriented silicon steel sheet in the pulse electric field during the insulation period, and then taking out the oriented silicon steel sheet and cooling in the air to the room temperature. The invention has the advantages that: (1) the equipment and operation are simple; (2) the magnetic characteristics of the oriented silicon steel sheet are improved greatlywith stable effects; and (3) the damaged area of the surface coating of the oriented silicon steel sheet is small.

Description

[0001] technical field [0002] The invention belongs to the field of material science and engineering research, and mainly relates to a method for improving the magnetic properties of oriented silicon steel through a pulse electric field. technical background [0003] Grain-oriented silicon steel is widely used in electric power and electronics industries, and is used as the iron core material in transformers and motors. It needs to have good magnetic properties. However, due to the high technical difficulty, currently the enterprises that can produce it are extremely limited. The continuous development of the demand of related industries has brought about the improvement of the technical requirements for the production of grain-oriented silicon steel. Therefore, how to improve the magnetic properties of grain-oriented silicon steel has become increasingly important. and P 17 / 50 (iron loss at 50Hz frequency, 1.7T magnetic induction intensity) and B 8 (Magnetic inducti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/26C21D8/12C21D1/74C21D1/04
Inventor 孔为苍大强宋佳慧
Owner UNIV OF SCI & TECH BEIJING
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