High-formability high-strength hot-dip galvanized dual-phase steel and production method thereof

A production method, hot-dip galvanizing technology, applied in the direction of hot-dip galvanizing process, coating, metal material coating process, etc., can solve the problem of reduced welding performance, increased hot rolling load, and no comprehensive consideration of formability, galvanizing performance and Welding performance and other issues, to achieve the effect of excellent welding performance, excellent galvanizing performance, significant economic and social benefits
CN110331341AActive Publication Date: 2019-10-15PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
Publication Date
2019-10-15

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Abstract

The invention relates to high-formability high-strength hot-dip galvanized dual-phase steel and a production method thereof, and belongs to the technical field of dual-phase steel metallurgy. The hot-dip galvanized dual-phase steel comprises the following chemical components of 0.05-0.10% of C, 0.20-0.50% of Si, 1.50-2.50% of Mn, 0.40-1.00% of Cr, 0.10-0.50% of Mo, 0.02-0.06% of Al, 0.010-0.050% of Nb, 0.04-0.10% of V, less than or equal to 0.015% of P, less than or equal to 0.005% of S and less than or equal to 0.006% of N. The preparation method comprises the following steps of smelting, hotrolling, acid rolling and hot-dip galvanizing annealing, and the hot-dip galvanizing annealing adopts a pre-oxidation reduction process. The prepared hot-dip galvanized dual-phase steel has excellentformability, welding performance and galvanization performance, and meets the requirements of high strength and high elongation.
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Description

technical field

[0001] The invention belongs to the technical field of dual-phase steel metallurgy, and in particular relates to a high-formability high-strength hot-dip galvanized dual-phase steel and a production method thereof. Background technique

[0002] With the development of automobile lightweight technology, it has become an inevitable trend for automobile steel to develop towards high-strength steel. Due to the characteristics of low yield strength, high tensile strength and excellent plasticity, dual-phase steel has become the preferred high-strength steel for automobiles, and its consumption is expected to exceed 70% of the advanced high-strength steel for automobiles. With the continuous release of domestic auto sheet production capacity, the competition in the high-strength steel market has become increasingly fierce. Low-cost, high-performance dual-phase steel has become the goal pursued by various companies and has attracted great attention.

[0003] Patent...

Claims

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