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Manufacturing method for improving extensibility of commonly-cooled ferrite lightweight steel

A technology of ordinary cold ferrite and manufacturing method, which is applied in the field of ferritic light steel, can solve the problems of reducing the bending performance of the steel plate, the overall ductility of the annealed steel plate, and the poor plasticity of the delta ferrite deformation, so as to achieve the optimization of the manufacturing process , good prospects for promotion and application, and the effect of improving tissue uniformity

Active Publication Date: 2015-09-23
BAOSHAN IRON & STEEL CO LTD
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Problems solved by technology

Therefore, although enough metastable retained austenite is distributed in the matrix of the annealed steel plate, due to the poor deformation plasticity of the delta ferrite, the failure mode of the delta ferrite in the annealed steel plate often occurs clea

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  • Manufacturing method for improving extensibility of commonly-cooled ferrite lightweight steel
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  • Manufacturing method for improving extensibility of commonly-cooled ferrite lightweight steel

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Abstract

The invention discloses a manufacturing method for improving extensibility of commonly-cooled ferrite lightweight steel. The manufacturing method includes: performing pretreatment before cold rolling, cold rolling and continuous-annealing thermal treatment on thermally-rolled plates, wherein pretreatment before cold rolling includes cold-rolling pre-deformation and recrystallizing annealing. The thermally-rolled steel plates are pretreated before cold rolling to refine high-temperature delta ferrite and improve tissue uniformity of the steel plates after being annealed. By the manufacturing method, high strength of the steel plates is guaranteed while extensibility and strength and elongation product are improved remarkably.

Description

technical field [0001] The invention belongs to the field of ferritic light steel, and in particular relates to a manufacturing method for improving the ductility of ordinary cold ferritic light steel. Background technique [0002] The application of high-strength steel and advanced high-strength steel to replace traditional low-strength grade steel can increase the specific strength (ratio of strength to density) of automotive steel and reduce the thickness of structural parts to achieve lightweight automotive structures. Another effective way to increase the specific strength of automotive steel is to reduce the density of the steel on the basis of maintaining the excellent mechanical properties of the above-mentioned high-strength steel. Therefore, the development of low-density, high-strength and toughness steel plates is just to meet the urgent need to further realize the lightweight of automobiles. [0003] Low-density steel generally reduces the density of carbon ste...

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Application Information

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IPC IPC(8): C21D8/00C21D6/00C22C38/58C22C38/54
Inventor 杨旗毕文珍王国栋王利
Owner BAOSHAN IRON & STEEL CO LTD
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