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Method for producing whole process cold-rolled non-oriented electrical steel 35WD1900 by using ultra-rapid cooling process

A technology of grain-oriented electrical steel and ultra-fast cooling, which is applied in the production of cold-rolled non-oriented electrical steel 35WD1900, can solve the problems of poor corrosion resistance, unstable quality and high production cost, and achieves controllable shape, high efficiency, and high resistance to corrosion. The effect of improving the rust ability

Active Publication Date: 2019-06-11
GUANGDONG ZHONGSHENG ELECTROMAGNETIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the non-oriented electrical steel 35WD1900 for new energy vehicles produced by the existing technology in my country has disadvantages such as poor electromagnetic properties, poor corrosion resistance, high production costs, and unstable quality.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Pour molten iron from the blast furnace into the molten iron ladle, carry out magnesium blowing desulfurization through molten iron pretreatment, pour the desulfurized molten steel into the oxygen top-bottom compound blowing converter, and add scrap steel accounting for 12% of the total weight into the converter at the same time, during the blowing process Limestone and fluorite are added to the converter furnace, and the converter adopts the whole process of bottom blowing argon process. When the composition of molten steel [C]≤0.06%, [S]≤0.001%, and the end temperature of molten steel is 1680℃, the steel is tapped with fixed oxygen. A compound deoxidizer is added during tapping, and argon is blown throughout the process of tapping the converter. After blowing argon, the molten steel temperature is measured, oxygen is fixed, and samples are taken. According to the oxygen content in the molten steel, aluminum wire is fed into the molten steel, and the molten steel is sen...

Embodiment 2

[0029] Pour molten iron from the blast furnace into the molten iron ladle, carry out magnesium blowing desulfurization through molten iron pretreatment, pour the desulfurized molten steel into the oxygen top-bottom compound blowing converter, and add scrap steel accounting for 12% of the total weight into the converter at the same time, during the blowing process Limestone and fluorite are added to the converter furnace, and the converter adopts the whole process of bottom blowing argon process. When the composition of molten steel [C]≤0.06%, [S]≤0.001%, and the end temperature of molten steel is 1680℃, the steel is tapped with fixed oxygen. A compound deoxidizer is added during tapping, and argon is blown throughout the process of tapping the converter. After blowing argon, the molten steel temperature is measured, oxygen is fixed, and samples are taken. According to the oxygen content in the molten steel, aluminum wire is fed into the molten steel, and the molten steel is sen...

Embodiment 3

[0033] Pour molten iron from the blast furnace into the molten iron ladle, carry out magnesium blowing desulfurization through molten iron pretreatment, pour the desulfurized molten steel into the oxygen top-bottom compound blowing converter, and add scrap steel accounting for 12% of the total weight into the converter at the same time, during the blowing process Limestone and fluorite are added to the converter furnace, and the converter adopts the whole process of bottom blowing argon process. When the composition of molten steel [C]≤0.06%, [S]≤0.001%, and the end temperature of molten steel is 1680℃, the steel is tapped with fixed oxygen. A compound deoxidizer is added during tapping, and argon is blown throughout the process of tapping the converter. After blowing argon, the molten steel temperature is measured, oxygen is fixed, and samples are taken. According to the oxygen content in the molten steel, aluminum wire is fed into the molten steel, and the molten steel is sen...

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Abstract

The invention discloses a method for producing a whole process cold-rolled non-oriented electrical steel 35WD1900 by using an ultra-rapid cooling process. The method comprises the steps of smelting, continuous casting of steel plates into continuous casting billets, heating with a heating furnace, hot rolling, pickling, cold rolling, decarburization annealing and coating; and in the hot rolling step, the finishing rolling outlet temperature is cooled to the termination temperature by an ultra-rapid cooling method, and specifically, the cooling rate is 80 DEG C / s to 120 DEG C / s. According to the method for producing the whole process cold-rolled non-oriented electrical steel 35WD1900 by using the ultra-rapid cooling process, the hot rolling and cold rolling processes are more easily controlled, production is more stable, and the plate shape is more controllable; the iron loss of the product is characterized in that P15 / 50 is smaller than or equal to 2.35W / kg and P10 / 400 is smaller thanor equal to16.5W / kg, the minimum magnetic polarization J5000 is larger than or equal to 1.67T, and the performance meets the requirements of high-strength non-oriented electrical steel for new energyvehicle drive motors.

Description

technical field [0001] The invention relates to a method for producing cold-rolled non-oriented electrical steel 35WD1900, more specifically, a method for producing full-process cold-rolled non-oriented electrical steel 35WD1900 by using an ultra-fast cooling process. Background technique [0002] In 2018, the production and sales of new energy vehicles in my country were 1.27 million and 1.256 million respectively, an increase of 59.9% and 61.7% over the same period of the previous year, more than twice the production and sales of new energy vehicles in the United States. In order to promote urban green construction and respond to the call for green environmental protection, many regions across the country have gradually implemented the promotion of new energy vehicles. For example, Hainan Province announced in April 2018 that in addition to planning to gradually ban the sale of fuel vehicles, it is also considering banning fuel vehicles from driving on the road by 2030. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/76C21D1/26C21D3/04C21D8/02C23G1/08C22C38/06C22C38/04C22C38/02
Inventor 陆正谊周峰李烈军
Owner GUANGDONG ZHONGSHENG ELECTROMAGNETIC TECH CO LTD
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