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Cold-rolled non-oriented electrical steel 35WD1900 and production method thereof

A technology of oriented electrical steel and production method, applied in the direction of metal rolling, rolling force/roll gap control, temperature control, etc., can solve the problems of poor electromagnetic performance, unstable quality, high production cost, etc., and achieve controllable plate shape , high efficiency, and improved rust resistance

Active Publication Date: 2019-05-31
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, high production costs, and unstable quality.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Pour the blast furnace molten iron into the molten iron ladle, perform magnesium blowing desulfurization through molten iron pretreatment, pour the desulfurized molten steel into the oxygen top-bottom composite converting converter, and add 12% of the total weight of scrap steel into the converter during the converting process. Limestone and fluorite are added to the intermediate converter. The converter adopts the whole process of bottom argon blowing. 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 constant oxygen. Compound deoxidizer is added during tapping, and argon is blown throughout the process of tapping from the converter. After argon is blown, the temperature of molten steel is measured, oxygen is determined, and samples are taken. According to the oxygen content in the molten steel, the aluminum wire is fed to the molten steel, and the molten steel is sent to the vacuum RH r...

Embodiment 2

[0031] Pour the blast furnace molten iron into the molten iron ladle, perform magnesium blowing desulfurization through molten iron pretreatment, pour the desulfurized molten steel into the oxygen top-bottom composite converting converter, and add 12% of the total weight of scrap steel into the converter during the converting process. Limestone and fluorite are added to the intermediate converter. The converter adopts the whole process of bottom argon blowing. 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 constant oxygen. Compound deoxidizer is added during tapping, and argon is blown throughout the process of tapping from the converter. After argon is blown, the temperature of molten steel is measured, oxygen is determined, and samples are taken. Feed the aluminum wire to the molten steel according to the oxygen content in the molten steel, and send the molten steel into the vacuum RH refin...

Embodiment 3

[0034] Pour the blast furnace molten iron into the molten iron ladle, perform magnesium blowing desulfurization through molten iron pretreatment, pour the desulfurized molten steel into the oxygen top-bottom composite converting converter, and add 12% of the total weight of scrap steel into the converter during the converting process. Limestone and fluorite are added to the intermediate converter. The converter adopts the whole process of bottom argon blowing. 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 constant oxygen. Compound deoxidizer is added during tapping, and argon is blown throughout the process of tapping from the converter. After argon is blown, the temperature of molten steel is measured, oxygen is determined, and samples are taken. Feed the aluminum wire to the molten steel according to the oxygen content in the molten steel, and send the molten steel into the vacuum RH refin...

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Abstract

The invention discloses a cold-rolled non-oriented electrical steel 35WD1900 and a production method thereof. The cold-rolled non-oriented electrical steel 35WD1900 comprises the following chemical components by weight: <= 0.005% of C, 2.0-2.5% of Si, 0.2-0.4% of Mn, 0.08-0.12% of P, <= 0.008% of S, 0.3-0.5% of Al, 0.004-0.006% of B and the balance of Fe and unavoidable impurities. The productionmethod includes the following steps: (1) a steel plate is subjected to continuous casting to form a continuously-cast billet, which is heated in a heating furnace after being cooled, and then subjected to hot rolling; (2) the hot-rolled billet is subjected to acid pickling, first cold rolling, decarburizing annealing and second cold rolling; and (3) after being subjected to the second cold rolling, the electrical steel is subjected to secondary annealing and coating to obtain the product. The performance of the cold-rolled non-oriented electrical steel 35WD1900 of the invention can meet the requirements of the high-strength non-oriented electrical steel used in the drive motors of new energy automobiles; and the welding performance and the stamping performance are good.

Description

Technical field [0001] The invention relates to a cold-rolled non-oriented electrical steel and a production method thereof, and more specifically, to a cold-rolled non-oriented electrical steel 35WD1900 and a production method thereof. Background technique [0002] In 2018, the production and sales of new energy vehicles in my country were 1.27 million and 1.256 million, an increase of 59.9% and 61.7% respectively 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, the promotion of new energy vehicles has been gradually implemented in many regions across the country. For example, Hainan Province announced in April 2018 that in addition to plans to gradually ban the sale of fuel vehicles, it also considered banning fuel vehicles from driving on the roads by 2030. Therefore, new energy vehicles are an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/06C22C38/04C22C38/02B22D11/20C21D1/26C21D1/76C21D3/04C21D8/02C23G1/08B21B1/46B21B37/74B21B37/58
Inventor 程清祥周峰李烈军
Owner GUANGDONG ZHONGSHENG ELECTROMAGNETIC TECH CO LTD
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