Non-oriented electrical steel plate with excellent high-frequency iron losses and manufacturing method of non-oriented electrical steel plate

A technology for an oriented electrical steel sheet and a manufacturing method, which is applied in the field of steel sheets and their manufacturing, can solve the problems of reduced magnetic induction intensity, large grain deformation, and increased annealing temperature of finished strip steel, so as to reduce the proportion, increase energy storage, and save energy. consumption effect

Inactive Publication Date: 2021-03-02
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As we all know, after the thickness of the finished strip steel is reduced, the cold rolling reduction rate is large, and after high-temperature continuous annealing, the strip steel is easy to be elongated, and the degree of grain deformation is large, which causes the problem of large anisotropy and affects the driving motor. The effect is very unfavorable
At the same time, un...

Method used

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  • Non-oriented electrical steel plate with excellent high-frequency iron losses and manufacturing method of non-oriented electrical steel plate
  • Non-oriented electrical steel plate with excellent high-frequency iron losses and manufacturing method of non-oriented electrical steel plate
  • Non-oriented electrical steel plate with excellent high-frequency iron losses and manufacturing method of non-oriented electrical steel plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment A8-A19 and comparative example A1-A7

[0064] The non-oriented electrical steel sheets of Examples A8-A19 and the conventional steel sheets of Comparative Examples A1-A7 were prepared by the following steps:

[0065] (1) Molten iron and steel scrap are matched according to the composition ratio shown in Table 1. After smelting in the converter, after decarburization, deoxidation and alloying in RH refining, the molten steel is treated with calcium, and the molten steel is cast by continuous casting , to obtain a continuous casting slab with a thickness of 120-250 mm and a width of 800-1400 mm.

[0066] (2) Hot rolling: During the heating process of the hot rolling step, the furnace temperature of the slab heating is ≥600°C, and the temperature is raised immediately after the slab is put into the furnace, and the temperature rise rate until the continuous casting slab starts hot rolling is controlled at 1.6~ 3.0°C / min.

[0067] (3) Normalization: The hot-rolled plate adopts normalization treatment, the normalizatio...

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Abstract

The invention discloses a non-oriented electrical steel plate with excellent high-frequency iron losses. The non-oriented electrical steel plate comprises chemical elements including, by mass percent,larger than 0% and smaller than or equal to 0.003% of C, 0.1-3.5% of Si, 0.1-2.0% of Mn, smaller than or equal to 0.003% of O, smaller than or equal to 0.005% of S, 0.0005-0.01% of Ca, 0.003-0.2% ofSn, 0.1-2.0% of Al, and the balance Fe and other inevitable impurities. In addition, the invention further discloses a continuous annealing process of the non-oriented electrical steel plate with excellent high-frequency iron losses. The continuous annealing process comprises the following steps: heating cold-rolled strip steel from the room temperature to an intermediate heat preservation temperature T<preservation temperature> at a heating speed of 50-800 DEG C/s, and and keeping the temperature for 10-60 seconds, wherein the equation is that T<preservation temperature> is equal to the sum of T<Curie temperature> + 120-180 DEG C; and then heating the cold-rolled strip steel to the soaking temperature T from T<heat preservation> so as to carry out soaking heat preservation.

Description

technical field [0001] The invention relates to a steel plate and a manufacturing method thereof, in particular to a non-oriented electrical steel plate and a manufacturing method thereof. Background technique [0002] In recent years, in order to reduce the harm of energy consumption to the natural environment, people have made great efforts to use clean energy such as electricity, wind power, and solar energy. Taking the means of transportation used in daily life as an example, all kinds of fuel vehicles are gradually being replaced by hybrid and pure electric electric vehicles. The energy conversion device of these electric vehicles is a drive motor made of non-oriented electrical steel sheet. Moreover, in order to improve the use function of the electric vehicle drive motor, it is developing in the direction of miniaturization, high frequency, and high efficiency. And the control requirements of small anisotropy, the thickness reduction of the finished strip is also on...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/06C21D8/12C21D1/26
CPCC21D1/26C21D8/1222C21D8/1233C22C38/002C22C38/004C22C38/008C22C38/02C22C38/04C22C38/06
Inventor 储双杰王波沈侃毅陈晓刘宝军张峰
Owner BAOSHAN IRON & STEEL CO LTD
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