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35WD1600 electrical steel for new energy automobile driving motor and production method of 35WD1600 electrical steel

A technology for new energy vehicles and drive motors, applied in manufacturing tools, rolling mill control devices, metal processing equipment, etc., can solve the problems of unstable quality, poor electromagnetic performance, high production cost, etc., and achieve good punching performance and stable plate shape control, anti-rust ability to improve the effect

Active Publication Date: 2022-03-01
GUANGDONG ZHONGSHENG ELECTROMAGNETIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the non-oriented electrical steel 35WD1600 used in the drive motor of new energy vehicles produced by the existing technology in my country has the disadvantages of poor electromagnetic properties, unstable quality, and high production costs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034]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 into the converter furnace. The converter adopts the whole process of bottom blowing argon. When the composition of molten steel [C]≤0.06%, [S]≤0.001%, and the end temperature of molten steel is 1650℃, the steel is tapped with fixed oxygen. Add compound deoxidizer when tapping the converter, blow argon throughout the process of tapping the converter, measure molten steel temperature, fix oxygen, and take samples after blowing argon. According to the oxygen content in the molten steel, aluminum wire is fed into the molten steel, and the molten steel is sent to the vacuum RH refining furna...

Embodiment 2

[0037] 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 clean scrap steel accounting for 18% of the total weight into the converter at the same time. During the process, limestone and fluorite are added to the converter furnace. The converter adopts the whole process of bottom blowing argon. When the molten steel composition [C]≤0.06%, [S]≤0.002%, and the end temperature of the molten steel is 1650℃, the steel is tapped with constant oxygen. Add compound deoxidizer when tapping the converter, blow argon throughout the process of tapping the converter, measure molten steel temperature, fix oxygen, and take samples after blowing argon. According to the oxygen content in the molten steel, aluminum wire is fed into the molten steel, and the molten steel is sent to the vacuum RH refining fur...

Embodiment 3

[0040] 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 clean scrap steel accounting for 10% of the total weight into the converter at the same time. During the process, limestone and fluorite are added to the converter furnace. The converter adopts the whole process of bottom blowing argon. When the molten steel composition [C]≤0.06%, [S]≤0.002%, and the end temperature of the molten steel is 1680℃, the steel is tapped with constant oxygen. Add compound deoxidizer when tapping the converter, blow argon throughout the process of tapping the converter, measure molten steel temperature, fix oxygen, and take samples after blowing argon. According to the oxygen content in the molten steel, aluminum wire is fed into the molten steel, and the molten steel is sent to the vacuum RH refining fur...

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Abstract

The invention discloses 35WD1600 electrical steel for a new energy automobile driving motor and a production method of the 35WD1600 electrical steel. Belongs to the technical field of new energy automobile driving motor electrical steel production, mainly solves the technical problem of poor performance of new energy driving motor electrical steel in the prior art, and comprises the following chemical element components in percentage by weight: less than or equal to 0.005% of C, 2.5-2.8% of Si, 0.2-0.4% of Mn, 0.08-0.12% of P, less than or equal to 0.008% of S, 0.20-0.30% of Cu, 0.16-0.25% of Ni, 0.3-0.5% of Al and the balance of Fe and inevitable impurities. The production method comprises the following steps: (1) pretreating molten iron; (2) smelting in a converter; (3) RH refining; (4) continuous casting and rolling; (5) pickling; (6) first cold rolling decarburization annealing; (7) secondary cold rolling decarburization annealing; (8) coating; and (9) sintering and coiling. According to the 35WD1600 electrical steel for the new energy automobile driving motor, the performance meets the national standard and customer requirements of cold-rolled non-oriented electrical steel strips for the new energy automobile driving motor, and the welding performance, the plate shape and the punching performance are good.

Description

technical field [0001] The invention relates to the production technology of electrical steel for driving motors of new energy vehicles, and more specifically, relates to a 35WD1600 electrical steel for driving motors of new energy vehicles and a production method thereof. Background technique [0002] The energy efficiency of electric motors and electrical appliances largely depends on the electromagnetic properties of electrical steel. In addition, under the background of "carbon peak" and "carbon neutrality" in my country, the requirements for energy conservation and emission reduction are increasing day by day. The country has put forward strict requirements for the energy efficiency upgrade of transformers, motors, and household appliances. The improvement of standards will also increase the demand for high-grade non-oriented silicon steel, while the market for low-end products will gradually be eroded. [0003] The power (torque), efficiency and life of the new energy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D8/12C22C38/02C22C38/04C22C38/16C22C38/08C22C38/06C22C33/06C21D1/26B21B37/00B21B37/76
CPCC21D8/1222C21D8/1255C21D8/1277C21D8/1233C21D1/26C22C38/004C22C38/02C22C38/04C22C38/16C22C38/08C22C38/06C22C33/06B21B37/00B21B37/76Y02P10/20
Inventor 陆正谊周峰李烈军姚顺强白洪李国宝
Owner GUANGDONG ZHONGSHENG ELECTROMAGNETIC TECH CO LTD
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