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Twinning induced plasticity steel and production method thereof

A technology of twin crystal induced plasticity and production method, applied in the fields of iron and steel metallurgy and metal materials, can solve the problems of limited commercial application and low yield strength, and achieve the effect of high market application value

Active Publication Date: 2015-02-25
嘉善县魏塘资产管理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, although TWIP steel has high strength and high plasticity, compared with other advanced high-strength steels, the yield strength of TWIP steel is lower, about 200-400MPa, which limits its commercial application in the automobile manufacturing industry.

Method used

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  • Twinning induced plasticity steel and production method thereof

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Embodiment Construction

[0022] In order to facilitate the understanding of the present invention, the present invention will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0023] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical", "horizontal", "left", "right" and...

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Abstract

The invention discloses twinning induced plasticity steel and a production method thereof. The production process comprises a steelmaking step, a continuous casting step and a rolling step; performing the continuous casting step is performed under a cast protective condition; the cast protective condition is that the casting powder is used for low superheat casting at a temperature of 5-10 DEG C, with the casting speed of 0.5 to 1.5 m / min; and in the rolling step, cold rolling pre deformation is adopted, and annealing treatment is performed when the temperature is near complete recrystallization. With the above scheme, the invention can provide the TWIP steel with a yield strength exceeding 1000MPa and a uniform elongation rate of more than 10%, is particularly suitable for special steel applications in automotive and the like, and has a very high market value.

Description

technical field [0001] The invention relates to iron and steel metallurgy and metal materials, in particular to a twinning induced plastic steel and a production method thereof. Background technique [0002] Steelmaking is a process of decarburization, temperature rise, and alloying through oxidation reactions. Its main tasks are decarburization, deoxidation, temperature rise, removal of gas and non-metallic inclusions, and alloying, mainly including molten iron pretreatment, converter blowing, alloying, Refining, continuous casting, rolling and other steps. [0003] For steel, its deformation is divided into elastic deformation (the original shape can be restored when the external force is removed) and plastic deformation (the original shape cannot be restored when the external force is removed, and the shape changes). When the stress exceeds the elastic limit, the deformation increases rapidly. In addition to deformation, some plastic deformation also occurs. When the st...

Claims

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Application Information

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IPC IPC(8): B22D11/18C21D8/00C22C38/12C22C38/14
CPCC22C38/14B22D11/00C21D8/00C21D8/0205C21D8/0236C21D8/0247C21D2201/02C21D2211/004C22C38/12B22D11/18C22C38/04C22C38/06
Inventor 何丽丽
Owner 嘉善县魏塘资产管理有限公司
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