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Non-oriented silicon steel for drive motor of electric automobile and preparation method thereof

A technology for driving motors and electric vehicles. It is applied in the field of non-oriented silicon steel manufacturing. It can solve the problems of poor magnetic properties and achieve excellent magnetic properties, short soaking time, and excellent magnetic levels.

Active Publication Date: 2016-09-21
武汉钢铁有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the strength of this product is high, its magnetic properties are poor

Method used

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  • Non-oriented silicon steel for drive motor of electric automobile and preparation method thereof
  • Non-oriented silicon steel for drive motor of electric automobile and preparation method thereof
  • Non-oriented silicon steel for drive motor of electric automobile and preparation method thereof

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Embodiment Construction

[0040] The present invention will be further described in detail below in conjunction with the examples to facilitate a clearer understanding of the present invention, but they do not limit the present invention.

[0041] The performance of the non-oriented silicon steel for electric vehicle drive motor prepared by optimizing the chemical composition will be further described below in conjunction with specific examples.

[0042] The chemical composition of the slab is shown in Table 1

[0043] Table 1 The chemical composition of the slab is shown in Table 1 (wt,%)

[0044]

[0045]

[0046]

[0047]

[0048] The rest is Fe (iron) and unavoidable impurities. Put the cast slab with a thickness of 200mm into the heating furnace for soaking, and hot-roll it into a hot-rolled coil with a thickness of 2.0mm. After the soaking temperature is 900°C, the soaking time is 40-180s, and the acid percentage concentration is 5%. Pickling at 80°C, rinsing at 45°C, cold rolling t...

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Abstract

The invention discloses non-oriented silicon steel for a drive motor of an electric automobile and a preparation method thereof. The performance of a silicon steel strip is controlled by optimizing chemical compositions and controlling the soaking time and soaking temperature of incomplete recrystallization annealing to regulate the recrystallization proportion. According to a rotor core made of the non-oriented silicon steel strip obtained after incomplete recrystallization annealing, the yield strength can reach 500 MPa or above, the Vickers hardness is 250 or below, and abrasion to a die is fully considered on the premise of guaranteeing the rotor strength. In addition, after stress annealing of the non-oriented silicon steel strip obtained after incomplete recrystallization annealing, a stator core manufactured from the steel strip is quite excellent in magnetic performance, i.e., the magnetic level of the stator core product after stress annealing is equivalent or even superior to that of a traditional full-process product.

Description

technical field [0001] The invention belongs to the field of non-oriented silicon steel manufacturing, in particular to a non-oriented silicon steel for electric vehicle drive motors and a preparation method thereof. Background technique [0002] In recent years, the problem of the global environment has become increasingly prominent, and many fields are advocating the use of energy-saving products. In the automotive field is no exception, great progress has been made in low emission and reduced fuel consumption technologies. The fields of electric vehicles and hybrid electric vehicles are very prominent examples in the field of energy saving and emission reduction, and the performance of the driving motor directly affects the performance of these electric vehicles. [0003] The iron core of the drive motor is mostly composed of permanent magnets, stators and rotors. Recently, IPM motors with permanent magnets embedded inside the rotor have been widely used. And with the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/06C22C38/04C21D8/12
CPCC21D8/1222C21D8/1233C21D8/1272C22C38/001C22C38/008C22C38/02C22C38/04C22C38/06
Inventor 石文敏冯大军陈圣林杜光梁杨光吕黎詹东方
Owner 武汉钢铁有限公司
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