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Non-oriented electrical steel for efficient motor and production method

A high-efficiency technology of oriented electrical steel, applied in non-oriented electrical steel for high-efficiency motors and its production field, can solve the problems of easy nodulation and low melting point

Inactive Publication Date: 2015-01-21
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because the document contains Sn in the composition, and the melting point of Sn is low, it is very easy to produce nodulation when the finished product is annealed

Method used

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  • Non-oriented electrical steel for efficient motor and production method
  • Non-oriented electrical steel for efficient motor and production method
  • Non-oriented electrical steel for efficient motor and production method

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Embodiment Construction

[0050] The present invention is described in detail below:

[0051] Table 1 is the value list of each embodiment of the present invention and comparative example;

[0052] Table 2 is the main process parameter list of each embodiment of the present invention and comparative example;

[0053] Table 3 is a list of the performance tests of the various embodiments of the present invention and comparative examples.

[0054] Each embodiment of the present invention is produced according to the following steps:

[0055] 1) Smelting: Smelting in a vacuum induction furnace according to the above composition, and casting into 25kg steel ingot;

[0056] 2) Billet opening: heat the steel ingot to 800-1000°C, keep it warm for 0.5-1 hour and take it out;

[0057] 3) After repeated forging, it is formed into a 30mm×100mm×L square billet; then it is sawed and cut into squares about 200mm long along the length direction;

[0058] 4) Heating, the heating temperature is controlled at 1100-11...

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Abstract

The invention relates to non-oriented electrical steel for an efficient motor. The non-oriented electrical steel for the efficient motor is prepared from the chemical components in percentage by weight: less than or equal to 0.0030% of C, 1.9-2.1% of Si, 0.28-0.32% of Mn, 0.10-0.60% of Al, 0.01-0.06% of P, less than or equal to 0.0050% of S, 0.10-0.30% of Cu, 0.02-0.05% of Sb and less than or equal to 0.0030% of N. The production process comprises the following steps: smelting; cogging; repeatedly forging to obtain square billets; heating; hot-rolling; normalizing; pickling; cold-rolling; and thermally heating. By controlling the total weight of main alloy elements (Si+Al+Mn) and auxiliary elements (Cu+P+Sb), favorable effects of elements in physical metallurgy are fully exerted. By researching the composite effect of elements (Cu+P+Sb) on silicon steel organization structure and magnetism, partial (Si+Al) is replaced by (Cu+P). On the one hand, the inflection time of a normalized plate can be improved and on the other hand, the punching property of a finished plate is improved. The non-oriented electrical steel for the efficient motor excellent in magnetic property and good in punching effect is developed.

Description

technical field [0001] The invention relates to a non-oriented electrical steel and a production method, in particular to a non-oriented electrical steel for high-efficiency motors and a production method. Background technique [0002] Electrical steel is the most important metal functional material for the manufacture of motors, transformers, ballast cores and various electrical components, and is an indispensable core material for the development of industries such as electric power, household appliances, telecommunications, and national defense. [0003] The traditional methods to improve motor efficiency are usually: ①Use more copper and iron materials to reduce the magnetic flux density; ②Use thin gauge, low iron loss, good shape, and insulating coated silicon steel sheets to reduce no-load loss. [0004] The performance requirements of high-efficiency motors for non-oriented electrical steel mainly include the following aspects. [0005] Low iron loss, high magnetic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/60
CPCC22C38/001C22C38/02C22C38/04C22C38/06C22C38/16C22C38/60
Inventor 冯大军石文敏吕黎杜光梁骆忠汉毛炯辉陈圣林郑泽林党宁员
Owner 武汉钢铁有限公司
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