Production method of non-oriented electrical steel 50W800 by traditional hot continuous rolling process

A technology of oriented electrical steel and production method, which is applied in the field of full-process cold-rolled non-oriented electrical steel 50W800, which can solve the problems of difficult rolling and processing, rusting of silicon steel sheets, easy oxidation of silicon, etc., and achieves good welding performance and easy control , the effect of controllable plate shape

Inactive Publication Date: 2016-10-26
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But too high silicon content will lead to the brittleness of silicon steel, which will bring difficulties to rolling and processing
In addition, silicon is easily oxidized and causes silicon steel sheets to rust

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A production method for producing non-oriented electrical steel 50W800 by a traditional hot continuous rolling process:

[0051] Step 1), molten iron pretreatment: Pour the blast furnace molten iron into the ladle, and perform magnesium blowing desulfurization through the molten iron pretreatment;

[0052] Step 2), converter smelting: Oxygen top-bottom compound blowing converter, pour the molten steel after desulfurization into the oxygen top-bottom compound blowing converter, add scrap steel accounting for 10% of the total weight into the converter at the same time, in the process of blowing to the converter Limestone and fluorite are added into the furnace, when the composition of molten steel [C]≤0.06%, [P]≤0.04%, [S]≤0.15%, when the end point temperature of molten steel is 1680℃, steel is tapped with constant oxygen;

[0053] Step 3), argon blowing: add composite deoxidizer when tapping the converter, blow argon throughout the process of tapping the converter, measu...

Embodiment 2

[0063] A production method for producing non-oriented electrical steel 50W800 by a traditional hot continuous rolling process:

[0064] Step 1), molten iron pretreatment: Pour the blast furnace molten iron into the ladle, and perform magnesium blowing desulfurization through the molten iron pretreatment;

[0065] Step 2), converter smelting: Oxygen top-bottom compound blowing converter, pour the molten steel after desulfurization into the oxygen top-bottom compound blowing converter, add scrap steel accounting for 10% of the total weight into the converter at the same time, in the process of blowing to the converter Limestone and fluorite are added into the furnace, when the composition of molten steel [C]≤0.06%, [P]≤0.04%, [S]≤0.15%, when the end point temperature of molten steel is 1680℃, steel is tapped with constant oxygen;

[0066] Step 3), argon blowing: add composite deoxidizer when tapping the converter, blow argon throughout the process of tapping the converter, measu...

Embodiment 3

[0076] A production method for producing non-oriented electrical steel 50W800 by a traditional hot continuous rolling process:

[0077] Step 1), molten iron pretreatment: Pour the blast furnace molten iron into the ladle, and perform magnesium blowing desulfurization through the molten iron pretreatment;

[0078] Step 2), converter smelting: Oxygen top-bottom compound blowing converter, pour the molten steel after desulfurization into the oxygen top-bottom compound blowing converter, add scrap steel accounting for 10% of the total weight into the converter at the same time, in the process of blowing to the converter Limestone and fluorite are added into the furnace, when the composition of molten steel [C]≤0.06%, [P]≤0.04%, [S]≤0.15%, when the end point temperature of molten steel is 1680℃, steel is tapped with constant oxygen;

[0079] Step 3), argon blowing: add composite deoxidizer when tapping the converter, blow argon throughout the process of tapping the converter, measu...

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Abstract

The invention discloses a production method of non-oriented electrical steel 50W800 by a traditional hot continuous rolling process. The production method comprises the steps of: 1) pretreatment of molten iron; 2) converter smelting; 3) argon blowing; 4) RH refining; 5) casting; 6) acid washing and cold rolling; 7) degreasing and cleaning, decarbonization and annealing; and 8) coating. The half-process cold-rolled non-oriented electrical steel with a mark of 50W800 and a thickness of 0.50 mm has the product electromagnetic performance of P15 / 50 not more than 5.2 W / kg and the magnetic induction strength of B50 not less than 1.74 T; and compared with the national standard of traditional half-process non-oriented electrical steel, the iron loss is lower by 2.8 W / kg, the magnetic induction strength is higher by 0.04 T, the interlayer resistance is not less than 2100 omega.mm 2 / p to satisfy the national standard and the customer requirements, the Vickers hardness is 80-100 HV10, the repeated bending times are not smaller than 12 times, and the welding performance is excellent.

Description

technical field [0001] The invention relates to a production method of full-process cold-rolled non-oriented electrical steel 50W800, specifically a production method of non-oriented electrical steel 50W800 produced by a traditional hot continuous rolling process. Background technique [0002] Electrical silicon steel sheet is a kind of soft magnetic material, which is the most widely used alloy material in magnetic materials. It is mainly used in the manufacture of transformers, motor cores and other magnetic components in the electromechanical industry. Manufacturing, household appliances, radio technology, telecommunication instrumentation and other industries are indispensable important materials. Due to its complex production process, high technical content, difficult production and large investment, cold-rolled electrical steel There are only a few steel mills that can produce it, and these manufacturers all use casting slabs of traditional thickness, that is, traditio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/04C21D8/12C22C38/04C22C38/06C22C38/02
CPCC22C33/04C21D8/1222C21D8/1233C21D8/1255C22C38/004C22C38/02C22C38/04C22C38/06
Inventor 孙海波李烈军周峰高吉祥彭政务胡玲陈松军张河健卢布刘江
Owner SOUTH CHINA UNIV OF TECH
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