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Non-oriented silicon steel for coiled iron core and production method thereof

A technology of oriented silicon steel and iron core, which is applied in the field of non-oriented silicon steel for coiled iron core and its production, can solve the problems of high iron loss and high cost, and achieve the effect of simple cold rolling process

Active Publication Date: 2017-12-08
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

Such patents usually add a lot of precious metals, the cost is high, and the iron loss is high, which cannot meet the requirements of users

Method used

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  • Non-oriented silicon steel for coiled iron core and production method thereof
  • Non-oriented silicon steel for coiled iron core and production method thereof
  • Non-oriented silicon steel for coiled iron core and production method thereof

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Embodiment Construction

[0030] The present invention is described in detail below:

[0031] Table 1 is the component value list of each embodiment of the present invention and comparative example;

[0032] Table 2 is the value list of the main process parameters of each embodiment of the present invention and comparative examples;

[0033] Table 3 is a list of performance testing conditions of each embodiment of the present invention and comparative examples.

[0034] Each embodiment of the present invention is produced according to the following steps:

[0035] 1) After smelting and casting into billet, heat the billet, and the heating temperature is controlled at 1000~1150°C;

[0036] 2) Hot rolling, the final rolling temperature is controlled at 780~840°C;

[0037] 3) Carry out normalization, control the normalization temperature at 850~980℃, and the normalization holding time at 30~90s;

[0038] 4) Cold rolled to a thickness of 0.35mm after pickling;

[0039] 5) Anneal the finished product, ...

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Abstract

The invention discloses non-oriented silicon steel for a coiled iron core. The non-oriented silicon steel comprises the following components in percentage by weight: C not more than 0.003%, 1.1-2.4% of Si, Al not more than 0.5%, Mn not more than 1.0%, 0.005-0.08% of Sn, N not more than 0.005%, and S not more than 0.005%. A production method comprises the production steps of: heating of a casting blank after smelting and blank casting, hot rolling, normalization, cold rolling after acid washing, annealing of a finished product, and coating of a protection layer. The adding amounts of such alloys as Si+Al and Sn are fewer; the hot rolling, normalization and cold rolling processes are simple; the average grain diameter of the product is 50-80 microns; the magnetic induction B5000 is not less than 1.75 T; the iron loss P1.5 / 50 is not more than 3.0 W / kg; and the ductility A50 is not less than 32% at a temperature below -20 DEG C.

Description

technical field [0001] The invention relates to a non-oriented silicon and a production method thereof, in particular to a non-oriented silicon steel for a coiled iron core and a production method thereof. Background technique [0002] Non-oriented electrical steel is the key material of motor and electrical iron core, its magnetic properties (iron loss and magnetic induction), mechanical properties (yield strength, tensile strength and elongation) have an important impact on the performance of the motor. With the diversification of motor types and working environments, motors have higher and higher requirements for core materials. [0003] In order to better save energy, the motor requires low iron loss and reduced core loss; at the same time, it requires high magnetic induction, so as to improve the working design point, reduce the excitation current, achieve low copper loss and reduce the size of the motor to achieve miniaturization. There are also some motors such as co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/06C22C38/04C22C38/02C22C33/04
Inventor 郑泽林黎世德李准柳志敏万政武欧阳页先王春锋刘义滔叶九美
Owner 武汉钢铁有限公司