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A kind of high-plasticity hot-rolled strip steel with tensile strength of 1180mpa and its production method

A technology of tensile strength and hot-rolled strip steel, applied in the field of hot-rolled high-strength steel, to achieve the effects of reducing rolling load, reducing cost and increasing plasticity

Active Publication Date: 2022-07-26
RIZHAO STEEL HLDG GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the materials obtained by the above technology can achieve high yield, high tensile strength and high elongation, the alloy composition system needs to match the continuous annealing process steps

Method used

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  • A kind of high-plasticity hot-rolled strip steel with tensile strength of 1180mpa and its production method
  • A kind of high-plasticity hot-rolled strip steel with tensile strength of 1180mpa and its production method

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with specific embodiments.

[0016] The invention is used for producing a high-strength and high-plasticity hot-rolled strip steel with a tensile strength of 1180 MPa, and the chemical composition of the strip steel includes: C: 0.15-0.24%, Si: 1.3-2.0%, Mn: 1.3~2.0%, Al: 1.2~2.0%, P≤0.015%, S≤0.005%, Re: 0.003~0.006%, Nb: 0.02-0.07%, Ti: 0.02-0.07%, Cr: 0.03-0.08%, The balance is Fe and inevitable impurities.

[0017] The principle of its elements and content is as follows:

[0018] C: It can significantly improve the strength and has the effect of interstitial solid solution strengthening; it can also increase the stability of austenite and obtain retained austenite. However, the C content should not be too high to ensure the formability and welding performance. The C content of the present invention does not exceed 0.24%.

[0019] Si: It can improve the strength through solid solution strengthen...

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Abstract

The invention discloses a high-strength and high-plasticity hot-rolled strip steel with a tensile strength of 1180 MPa, which belongs to the field of hot-rolled high-strength steel. 1.3-2.0%, Al: 1.2-2.0%, P≤0.015%, S≤0.005%, Re: 0.003-0.006%, Nb: 0.02-0.07%, Ti: 0.02-0.07%, Cr: 0.03-0.08%, The balance is Fe and inevitable impurities. Compared with the prior art, the present invention is used for the production of parts and components such as commercial vehicles and trucks, and is beneficial to the high-strength thinning and plastic forming of the parts.

Description

technical field [0001] The invention relates to the field of hot-rolled high-strength steel, in particular to a production method for a high-strength and high-plasticity hot-rolled steel plate and a steel strip with a tensile strength of 1180 MPa. Background technique [0002] In recent years, with the continuous improvement of national emission standards for energy conservation and environmental protection in the automotive field, the automotive industry has put forward comprehensive requirements for hot-rolled steel sheets such as higher strength, better plasticity, and better surface quality, in order to achieve high-strength, thinning, energy-saving and reduction. the purpose of reducing costs. Generally, hot-rolled high-strength steel with a tensile strength of more than 1180MPa has a significant decrease in plasticity as the strength increases, and cannot meet the requirements of high-strength thinning and plastic processing. [0003] Various iron and steel enterprise...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/26C22C38/28C22C38/36C22C38/38C21D8/02C21D9/52C21D6/00B21B37/00B21B37/16B21B37/74
CPCC22C38/02C22C38/04C22C38/06C22C38/002C22C38/005C22C38/26C22C38/28C22C38/36C22C38/38C21D6/002C21D6/005C21D6/008C21D8/0221C21D9/52B21B37/00B21B37/16B21B37/74
Inventor 陈宇薛俊峰刘炼伟陈宪辉张振卫赵斌杨迎春楚斌
Owner RIZHAO STEEL HLDG GROUP
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