Low-resilience and high-formability high-strength steel and manufacturing method thereof

A manufacturing method and formability technology, applied in the direction of manufacturing converters, etc., can solve the problems of high springback and high production process requirements, and achieve the effects of improving strength, comprehensive mechanical properties, and good market application prospects.

Inactive Publication Date: 2016-08-24
武汉钢铁有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned shortcomings, provide a high-strength steel with low springback and high formability and its manufacturing method, through composition design and control of process parameters, solve the problem of high production process requirements of existing high-strength steels of the same level The problem of high springback greatly improves the finished product rate and production efficiency, reduces production costs, and ensures good overall performance

Method used

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  • Low-resilience and high-formability high-strength steel and manufacturing method thereof
  • Low-resilience and high-formability high-strength steel and manufacturing method thereof
  • Low-resilience and high-formability high-strength steel and manufacturing method thereof

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Embodiment Construction

[0042] Below in conjunction with accompanying drawing and specific embodiment the present invention will be described in further detail:

[0043] Chemical composition design:

[0044] The chemical composition and weight percentage in the high-strength steel with low springback and high formability of Examples 1 to 6 and the comparative steel are shown in Table 1;

[0045] The manufacturing method of the high-strength steel with low resilience and high formability of embodiments 1 to 6 is as follows:

[0046] 1) Converter steelmaking: set the target temperature of tapping to 1650°C;

[0047] 2) Argon blowing: the treatment time of argon blowing is controlled within 5-10 minutes;

[0048] 3) Continuous casting: protective pouring measures are adopted during continuous casting. The long nozzles of the large and medium ladles are protected by argon seals for pouring, and the steel flow channels of the tundish are sealed with argon. Magnesium materials and alkaline tundish powder...

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Abstract

The invention discloses a low-resilience and high-formability high-strength steel and a manufacturing method thereof. The high-strength steel comprises the following chemical components in percentages by weight: 0.04-0.05% of C, 0.03-0.04% of Si, 0.67-0.71% of Mn, 0.009-0.015% of Al, less than or equal to 0.010% of P, 0.09-0.16% of S, 0.006-0.011% of Nb, 0.05-0.09% of Mo, 0.005-0.009% of W, 0.16-0.21% of Cr, 0.02-0.04% of Mg, less than or equal to 0.006% of N, less than or equal to 0.002% of O, and the balance Fe and inevitable impurities. In addition, the invention further discloses the manufacturing method of the high-strength steel. By designing the components and controlling technological parameters, the problem that existing same-grade high-strength steel has a high requirement on the production technology and is high in resilience is solved.

Description

technical field [0001] The invention relates to the technical field of manufacturing steel for automobiles, in particular to a high-strength steel with low springback and high formability and a manufacturing method thereof. Background technique [0002] High strength, high formability and good welding performance are the basic conditions necessary for automotive safety structures and reinforcements. Due to the above properties of high-strength cold-rolled or hot-dip galvanized steel sheets, they are widely used in various fields of economic construction. With the development of the automobile industry, in order to improve the safety of structural parts, it is required to increase the strength of materials, reduce the weight of structural parts, and reduce the consumption of materials. So far, high-strength cold-rolled steel sheets are still the most widely used and most effective steel products, and are widely used in automobile manufacturing. Low-alloy high-strength steel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/60C22C38/18C22C38/02C22C38/04C22C38/06C22C38/12C22C38/16C22C38/08C21C5/35C21C7/072C21D8/02
CPCC21C5/35C21C7/072C21D8/0226C21D8/0247C21D2211/005C21D2211/009C22C38/002C22C38/005C22C38/02C22C38/04C22C38/06C22C38/08C22C38/12C22C38/16C22C38/18C22C38/60
Inventor 王立辉周文强刘祥东林承江潘利波李立军
Owner 武汉钢铁有限公司
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