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Method for producing non-oriented high silicon steel by cold continuous rolling method

A technology for continuous cold rolling and high silicon steel, applied in the metallurgical field, can solve problems such as limited production capacity in the production process, and achieve the effect of improving capacity and continuous rolling capacity.

Active Publication Date: 2021-12-14
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, only a few large iron and steel complexes at home and abroad have high-grade silicon steel production technology and process equipment, and the capacity of traditional production processes is limited.

Method used

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  • Method for producing non-oriented high silicon steel by cold continuous rolling method

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Effect test

Embodiment 1

[0040] The method of producing non-oriented high-silicon steel by cold continuous rolling method, the steel chemical composition C: 0.0025%, Si: 2.61%, Als: 0.48%, Mn: 0.28%, O: 0.0056%, P: 0.010%, S: 0.0012% , N: 0.0017%, Ti: 0.0020%, V: 0.0015%, Nb: 0.0013%, B: 0.0045%, Sn: 0.065%, the rest is Fe and unavoidable residual elements; process route: hot metal desulfurization-converter smelting- RH refining - continuous casting - hot rolling - normalization - pickling - cold rolling - continuous furnace annealing - coating - performance inspection - packaging, the specific steps include:

[0041] 1) After RH vacuum decarburization treatment, aluminum deoxidation and partial aluminum alloying, 1 / 3 of the estimated amount of aluminum alloy is added; then the whole silicon steel is alloyed, boron alloying is added, the remaining aluminum alloy is added, and tin alloying is added;

[0042] 2) After alloying, the molten steel in the large tank is circulated for 6 minutes; the standing...

Embodiment 2

[0048] The method of producing non-oriented high-silicon steel by cold continuous rolling method, the steel chemical composition C: 0.0022%, Si: 2.88%, Als: 0.55%, Mn: 0.31%, O: 0.0060%, P: 0.011%, S: 0.0017% , N: 0.0019%, Ti: 0.0018%, V: 0.0014%, Nb: 0.0015%, B: 0.0049%, Sn: 0.105%, the rest is Fe and unavoidable residual elements; process route: hot metal desulfurization-converter smelting- RH refining - continuous casting - hot rolling - normalization - pickling - cold rolling - continuous furnace annealing - coating - performance inspection - packaging, the specific steps include:

[0049] After RH vacuum decarburization treatment, aluminum deoxidation and partial aluminum alloying, 1 / 3 of the calculated aluminum alloy content is added; then the whole silicon steel is alloyed, boron alloyed is added, the remaining aluminum alloy is added, other components are fine-tuned, and tin alloyed join in;

[0050] After alloying, the molten steel in the large tank is circulated 4 t...

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Abstract

The invention relates to a method for producing non-oriented high silicon steel by a cold continuous rolling method. The method comprises the following steps: after RH vacuum decarburization treatment, aluminum deoxidizing and partial aluminum alloying are carried out, and after alloying, net circulation is carried out on molten steel in a large tank for more than 3 times or more than 5 minutes; the standing time from smelting of qualified molten steel to continuous casting starting is longer than 20 minutes; the superheat degree is controlled to be 5-15 DEG C; electromagnetic stirring is adopted, and the proportion of equiaxed crystals is controlled to be 45% or above; 3) the charging temperature of a plate blank in the hot rolling process is higher than 750 DEG C; normalizing is carried out to enable the grain size to be in a range of 90-110 microns; and the temperature of a heating section of a continuous annealing furnace is set to be 950-1150 DEG C, the temperature of a soaking section is set to be 900-1050 DEG C, full-nitrogen dry atmosphere protection is adopted, and the grain size is controlled to be 120-170 microns. The thermo-history parameter control in the whole production process gives full play to the functions of designed microalloy elements, and changes the composition, size, form and distribution of precipitates.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a method for producing non-oriented high-silicon steel by cold continuous rolling. Background technique [0002] Non-oriented high-grade silicon steel series products are important functional soft magnetic materials. With the advancement of technology and the development of downstream industries, the demand is extensive, and it is gradually shifting from the field of large and medium-sized industrial motors and generators to high-efficiency motors, high-efficiency compressors, and new energy motors. development in other fields. [0003] At present, only a few large-scale iron and steel complexes at home and abroad have high-grade silicon steel production technology and process equipment, and the traditional production process capacity is limited. Now, with the progress of metallurgical technology and the improvement of process equipment capabilities, high-grade silicon steel has basica...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/06C22C38/04C22C38/14C22C38/12C22C38/60C21C7/00C21C7/10C21C7/068C21C7/06C21D8/12
CPCC22C38/02C22C38/004C22C38/06C22C38/04C22C38/14C22C38/12C22C38/008C22C38/60C21C7/0006C21C7/10C21C7/068C21C7/06C21D8/1222C21D8/1233C21D8/1244C21C2007/0018Y02P10/20
Inventor 高振宇李元华陈春梅刘文鹏罗理孟昭萍张仁波李亚东林棡姜福健
Owner ANGANG STEEL CO LTD
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