Ultrahigh-yield-ratio steel and production process thereof

A production process and yield-strength ratio technology, applied in the field of ultra-high yield-strength ratio steel and its production process, can solve the problems of complex production process, high cost, and insufficient strength.

Active Publication Date: 2020-10-27
VALIN ARCELORMITTAL AUTOMOTIVE STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The high-strength steels currently on the market, including DP, CP, MP, TRIP and Q&P series products, have sufficiently high tensile strength, but the production

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  • Ultrahigh-yield-ratio steel and production process thereof
  • Ultrahigh-yield-ratio steel and production process thereof
  • Ultrahigh-yield-ratio steel and production process thereof

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Embodiment Construction

[0024] Below in conjunction with all accompanying drawings the present invention will be further described, and preferred embodiment of the present invention is: see appended figure 1 to attach Figure 4 , the ultra-high yield strength ratio steel described in this embodiment has sufficient plasticity and good welding performance, and at the same time has a high resistance to plastic deformation, which can be used to maintain shape stability under high stress, and is not prone to Plastically deformed parts, or safety structures. Compared with DP, CP and other steels with the same composition and quenching process, the plasticity of the present invention is slightly lowered, but the yield strength is higher, and even the tensile strength is also increased. Therefore, the production method provided by the invention has low cost, and the produced product has stable and reliable performance.

[0025] In 1949, Cottrell and Bilby proposed the Coriolis air mass theory, which explai...

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Abstract

The invention provides ultrahigh-yield-ratio steel and a production process thereof. After strip steel is rapidly cooled, a dislocation source is provided through pre-strain treatment, and dislocationpinning strengthening treatment is adopted after pre-strain treatment, wherein the steel subjected to dislocation pinning strengthening is low-alloyed steel, and the carbon content is 0.02%-0.77%. The production process of the ultrahigh-yield-ratio steel comprises the steps of strip steel cold rolling, continuous annealing, rapid cooling, pre-strain treatment and dislocation pinning strengtheningtreatment. According to the scheme, the ultrahigh-yield-ratio steel has enough plasticity and good welding performance. The method can be used for manufacturing parts with high shape stability, highdeformation resistance and high reaming requirements, such as battery protection plates, bumpers, seat guide rails, reinforcers, and measuring tools of automobiles. The production process can also beused for manufacturing spring steel requiring high elastic limit.

Description

technical field [0001] The invention relates to iron and steel materials and related fields of metallurgy, in particular to an ultra-high yield ratio steel and its production process. Background technique [0002] The manufacture of some auto parts requires high deformation resistance for the materials used, requiring sufficient shape stability and high yield strength, such as battery packs, seat slide rails, anti-collision beams, reinforcements, etc. At present, the high-strength steels on the market include DP, CP, MP, TRIP and Q&P series products with high enough tensile strength, but the production process of these materials is complicated, or the cost is high, or the yield strength is not high enough, so Can not meet the production and use requirements very well. Contents of the invention [0003] The object of the present invention is to provide a super high yield strength ratio steel with sufficiently high yield strength and its production process. [0004] In ord...

Claims

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Application Information

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IPC IPC(8): C21D8/02
CPCC21D8/0205C21D8/0236C21D8/0247C21D2211/001C21D2211/002C21D2211/005C21D2211/008
Inventor 肖彪
Owner VALIN ARCELORMITTAL AUTOMOTIVE STEEL CO LTD
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