Method for preparing compound element processed non-oriented silicon steel for high-efficiency motor

A high-efficiency technology for oriented silicon steel, which is applied in the field of preparation of non-oriented silicon steel for high-efficiency motors, can solve the problems of reduced magnetic induction intensity, and achieve the effects of stable magnetic performance, high magnetic induction intensity, and low iron loss

Active Publication Date: 2015-12-09
ANHUI UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

Although the increase in grain size is beneficial to reduce iron loss, it will also lead to a decrease in magnetic induction

Method used

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  • Method for preparing compound element processed non-oriented silicon steel for high-efficiency motor
  • Method for preparing compound element processed non-oriented silicon steel for high-efficiency motor
  • Method for preparing compound element processed non-oriented silicon steel for high-efficiency motor

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Embodiment Construction

[0029] In order to further understand the contents of the present invention, the present invention will be further described below in conjunction with the examples.

[0030] The chemical composition (by weight percentage) of the non-oriented silicon steel for high-efficiency motors treated with compound elements of the present invention is: C≤0.005%, Si: 0.8%-1.7%, Mn: 0.3%-0.6%, Al: 0.2 %~0.4%, P≤0.015%, S≤0.004%, N≤0.004%, T[O]≤0.003%, La: 0.003%~0.015%, Ca: 0.0015%~0.0025%, B: 0.001%~0.004 %, the rest is Fe and unavoidable impurities.

[0031] The embodiment of the present invention and the comparative example are prepared according to the following process steps and technical parameters: (1) adopt vacuum induction furnace smelting according to the above-mentioned composition and cast into 6.5kg steel ingot; (2) ingot is heated in the muffle furnace of 1150 ℃ and Heat preservation for 1h, then forge into a billet of 80mm×70mm×L; (3) After the billet is soaked at 1180°C, it...

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Abstract

The invention discloses a method for preparing compound element processed non-oriented silicon steel for a high-efficiency motor and belongs to the technical field of electrical steel. A non-oriented electrical steel casting blank into which a certain amount of Ca, a certain amount of La and a certain amount of B are added serves as the raw material, smelting, forging, hot rolling, normalizing, acid pickling, primary cold rolling, intermediate annealing, secondary cold rolling and finished product annealing are conducted in sequence, the temperature and time of finished product annealing are controlled to be 900-940 DEG C and 3-5 min respectively, and the non-oriented silicon steel product, which is low in iron loss and high in magnetic strength, for the high-efficiency motor is obtained finally. The final magnetic performance of the product is that when a steel plate is 0.5 mm thick, P15 / 50=3.6-3.9 W / kg, and B5000=1.76-1.80 T. The steel belt finished product can be widely applied to large and medium motor manufacturing as well as variable-frequency air conditioner compressor manufacturing.

Description

technical field [0001] The invention belongs to the technical field of electrical steel, in particular to a method for preparing non-oriented silicon steel for high-efficiency motors. Background technique [0002] High-efficiency motors are developed in response to the high-efficiency and miniaturization requirements of micro-miniature motors, ballasts, and electronic transformers in recent years, and have been widely used in refrigeration compressors and other fields. Compared with ordinary motors, high-efficiency motors have higher working efficiency and lower power consumption. Due to the large power consumption of motors (accounting for about 2 / 3 of the total industrial power consumption, accounting for about 50% of the total power consumption) and the country's higher and higher requirements for environmental protection and energy conservation, the application and development of high-efficiency motors is very important for reducing Electric energy consumption and savin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/14C22C38/06C21D8/12
Inventor 万勇陈伟庆李杰范鼎东
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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