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Method for producing non-oriented electrical steel 50W800 through thin slab casting and rolling

A thin slab continuous casting, grain-oriented electrical steel technology, applied in the direction of metal rolling, can solve the problems of difficult removal, high production difficulty, high iron P content, low iron loss, good welding performance, and good punching performance. Effect

Active 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

[0016] At present, the non-oriented full-process electrical steel in China generally uses Si element as an element to improve magnetic properties. With the increase of Si content, the brittleness of steel is higher, making hot rolling and cold rolling production more difficult. At the same time, the higher the Si content, the steel is required The lower the P content is, the higher the P content in iron ore in some areas of my country, the higher the P content in molten iron, and it is not easy to remove in the steelmaking process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A method for producing non-oriented electrical steel 50W800 by continuous casting and rolling of thin slabs:

[0053] Step 1), molten iron pretreatment: Pour the blast furnace molten iron into the ladle, and perform magnesium blowing desulfurization through the molten iron pretreatment;

[0054] 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;

[0055] Step 3), argon blowing: add composite deoxidizer when tapping the converter, blow argon throughout the process of tapping the converter, measure the temp...

Embodiment 2

[0065] A method for producing non-oriented electrical steel 50W800 by continuous casting and rolling of thin slabs:

[0066] Step 1), molten iron pretreatment: Pour the blast furnace molten iron into the ladle, and perform magnesium blowing desulfurization through the molten iron pretreatment;

[0067] 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;

[0068] Step 3), argon blowing: add composite deoxidizer when tapping the converter, blow argon throughout the process of tapping the converter, measure the temp...

Embodiment 3

[0078] A method for producing non-oriented electrical steel 50W800 by continuous casting and rolling of thin slabs:

[0079] Step 1), molten iron pretreatment: Pour the blast furnace molten iron into the ladle, and perform magnesium blowing desulfurization through the molten iron pretreatment;

[0080] 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;

[0081] Step 3), argon blowing: add composite deoxidizer when tapping the converter, blow argon throughout the process of tapping the converter, measure the temp...

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PUM

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Abstract

The invention provides a method for producing non-oriented electrical steel 50W800 through thin slab casting and rolling. The method includes the steps of firstly, hot metal pretreatment; secondly, converter smelting; thirdly, argon blowing, wherein a complex deoxidizer is added in the converter tapping process, and argon blowing is conducted in the whole converter tapping process; fourthly, RH refining, wherein molten steel is conveyed into a vacuum RH refining furnace for smelting; fifthly, casting; sixthly, acid pickling and cold rolling; seventhly, degreasing and cleaning, and decarburizing and annealing and eighthly, coating. By the adoption of the method, the brand is 50W800, the non-oriented electrical steel is cold-rolled through the 0.50-mm thickness semi-process, the electromagnetic performance P15 / 50 of products is smaller than or equal to 5.6 W / kg, the magnetic induction intensity B50 is larger than or equal to 1.74 T, and compared with the current national standard of semi-processed non-oriented electrical steel, the performance is good.

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 thin slab continuous casting and rolling to produce non-oriented electrical steel 50W800. 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 A few steel mills can produce it, and these manufacturers all use the casting slab of traditional thickness, that is, the traditional process for prod...

Claims

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Application Information

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IPC IPC(8): C22C33/04C21D8/12B21B1/46C21C7/10C21C7/06C22C38/04C22C38/06B22D11/111
CPCB21B1/463B22D11/111C21C7/06C21C7/10C21D8/1222C21D8/1233C21D8/1255C21D2261/00C22C33/04C22C38/04C22C38/06
Inventor 李烈军周峰彭政务高吉祥孙海波陈松军刘江胡玲张河健张伟鹏
Owner SOUTH CHINA UNIV OF TECH
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