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Method for preparing non-oriented silicon steel plates for motor iron cores

A technology of silicon steel plate and iron core, which is applied in the field of preparation of non-oriented silicon steel plate for motor iron core, can solve the problems of high cost and complicated process, and achieve the effect of improving magnetic properties

Inactive Publication Date: 2018-11-30
SHENYANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is more complex and costly

Method used

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  • Method for preparing non-oriented silicon steel plates for motor iron cores
  • Method for preparing non-oriented silicon steel plates for motor iron cores
  • Method for preparing non-oriented silicon steel plates for motor iron cores

Examples

Experimental program
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Embodiment 1

[0036] The speed ratio of asynchronous rolling is the ratio of the number of teeth on the upper roll divided by the number of teeth on the lower roll, represented by i, the number of teeth of the gear is represented by z, and the subscripts indicate the gear of the upper roll and the gear of the lower roll respectively. The gear of the lower roll is fixed, and the gear with the number of teeth z down = 16 is selected, and the gear with the number of teeth z up = 17 is selected for the gear of the upper roll. The number of teeth on the upper roll of the rolling mill is controlled to change the speed ratio. The high-grade non-oriented silicon steel normalized sheet with a mass fraction of 3% silicon is rolled at a reduction rate of 18%, 36%, 55%, 77%, and 84% to obtain cold-rolled sheets of different thicknesses, and then The wire cutting method was used to process and sample the plates with different reduction rates. The sample size was 20 mm × 18 mm. The texture was measured in...

Embodiment 2

[0038] The speed ratio of asynchronous rolling is the ratio of the number of teeth on the upper roll divided by the number of teeth on the lower roll, represented by i, the number of teeth of the gear is represented by z, and the subscripts indicate the gear of the upper roll and the gear of the lower roll respectively. The gear of the lower roll is fixed, and the gear with the number of teeth z down = 16 is selected, and the gear with the number of teeth z up = 19 is selected for the gear of the upper roll. The number of teeth on the upper roll of the rolling mill is controlled to change the speed ratio. The speed ratio i = 1.19, and the thickness is 2.2mm. The high-grade non-oriented silicon steel normalized sheet with a mass fraction of 3% silicon is rolled at a reduction rate of 18%, 36%, 55%, 77%, and 84% to obtain cold-rolled sheets of different thicknesses, and then The wire cutting method was used to process and sample the plates with different reduction rates. The samp...

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Abstract

The invention discloses a method for preparing non-oriented silicon steel plates for motor iron cores, and relates to a method for manufacturing steel plates. The method includes that tooth numbers ofgears of upper rolls on four-roll rolling mills are changed, revolution numbers of upper rolls are adjusted, accordingly, revolution number ratios of the upper rolls and lower rolls can be changed, and asynchronous rolling can be implemented; particular adjusting technologies include keeping gears of the lower rolls fixed and unchanged and selecting the gears with the tooth numbers z <lower> of 16; the gears of the upper rolls are replaced, and asynchronous rolling speed ratios include a speed ratio i of 1.06, a speed ratio i of 1.19, a speed ratio i of 1.25 and a speed ratio i of 1.31; reduction rates are controlled, asynchronous rolling with different reduced quantities can be carried out, and the thicknesses of cold-rolled plates are 1.8 mm, 1.4 mm, 1.0 mm, 0.5 mm and 0.35 mm; plates with the different reduction rates are processed and sampled by the aid of linear cutting machining technologies. The method has the advantages that perfect texture components can be assuredly obtainedby the aid of the method, the method is applicable to non-oriented silicon steel cold-rolling production, the requirements on high-magnetic-induction and low-iron-loss development of non-oriented silicon steel can be met, and high-grade non-oriented silicon steel with perfect cold-roll texture components can be prepared by the aid of the method.

Description

technical field [0001] The invention relates to a method for manufacturing a steel plate, in particular to a method for preparing a non-oriented silicon steel plate for a motor iron core. Background technique [0002] The iron core materials used in generators and large motors generally use high-grade non-oriented silicon steel with low iron loss, which is required to be easily magnetized in all directions in the rolling surface, and the magnetic anisotropy is small. The magnetism of the silicon steel plate is affected by the crystallographic direction. In order to obtain good magnetism, the axis of easy magnetization needs to be parallel to the surface of the steel plate. [0003] In recent years, with the continuous improvement of energy saving and emission reduction requirements, the efficiency of motors has also been continuously improved. It is required to use higher-grade non-oriented silicon steel sheets, so it is necessary to reduce the iron loss of non-oriented sili...

Claims

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Application Information

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IPC IPC(8): B21B1/28B21B37/46
CPCB21B1/28B21B37/46B21B2275/05
Inventor 张正贵肖铁任传富周兆元牛建平赵时璐
Owner SHENYANG UNIV