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Steel for hot stamping forming, hot stamping forming process and hot stamping forming component

A technology of hot stamping forming and hot stamping, which is applied in the direction of hot-dip plating process, metal material coating process, substructure, etc., and can solve the problems of difficult control, low ductility, and high cost

Active Publication Date: 2017-02-15
NORTHEASTERN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is only proposed to control the sulfur content (sulphur element content is required to be less than 0.002wt%) to ensure ductility and avoid crack propagation caused by sulfide inclusions. However, it is difficult and costly to control the sulfur content below 20ppm in industry, so , the problem of low ductility cannot be completely solved by controlling the content of sulfur element

Method used

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  • Steel for hot stamping forming, hot stamping forming process and hot stamping forming component
  • Steel for hot stamping forming, hot stamping forming process and hot stamping forming component
  • Steel for hot stamping forming, hot stamping forming process and hot stamping forming component

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Embodiment Construction

[0023] The present invention will be described in more detail below with reference to exemplary embodiments. The following examples or experimental data are intended to illustrate the present invention, and it should be clear to those skilled in the art that the present invention is not limited to these examples or experimental data.

[0024] According to one embodiment of the present invention, there is provided a steel for hot stamping, which comprises the following components by weight: 0.27-0.40% C; 0.2-3.0% Mn; 0.11-0.4% V; 0-0.8 % Si; 0-0.5% Al; 0-2% Cr; 0-0.15% Ti; 0-0.15% Nb; 0-0.004% B; the total content of Mo, Ni, Cu less than 2% And other alloying elements that are beneficial to improve its hardenability, as well as other impurity elements.

[0025] The strength of martensite increases with the increase of carbon content, but high carbon content leads to the formation of twin martensite, which reduces the toughness of the material. Twin martensite must be tempered ...

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PUM

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Abstract

The invention relates to steel which is provided with ultra-fine grains and used for hot stamping forming, a manufacturing process of the steel, a hot stamping forming process and a hot stamping forming component. The steel comprises, by weight, 0.27%-0.40% of C, 0.2%-3.0% of Mn, 0.11%-0.4% of V, 0-0.8% of Si, 0-0.5% of Al, 0-2% of Cr, 0-0.15% of Ti, 0-0.15% of Nb, 0-0.004% of B, less than 2% of the total content of Mo, Ni, Cu and other alloy elements beneficial to improve the hardenability of the steel and other impurity elements.

Description

technical field [0001] The invention relates to a steel material for hot stamping forming with superfine grains, a hot stamping forming process and a hot stamping forming component. Background technique [0002] With the urgent needs of global energy saving, emission reduction and environmental protection economy, the automobile industry is developing in the direction of lightweight, but the lightweight of automobiles does not come at the expense of safety. On the contrary, the requirements for the crash safety of automobiles are getting higher and higher. At present, the application of high-strength and ultra-high-strength steels for vehicles in the automotive industry has attracted more and more attention due to their high strength and light weight. Under high strength, the cold stamping method is used, the formability is reduced, the required stamping force is large, and it is easy to crack. In addition, the part has a large springback after forming, and its shape and d...

Claims

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Application Information

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IPC IPC(8): C22C38/04C22C38/12C22C38/02C22C38/06C22C38/18C22C38/14C22C38/08C22C38/16C21D8/02B62D25/04B60R19/03B62D25/06B62D21/00
CPCB60R19/03B62D21/00B62D25/04B62D25/06C21D8/0205C22C38/02C22C38/04C22C38/06C22C38/08C22C38/12C22C38/14C22C38/16C22C38/18C22C38/32C21D8/00C21D8/04C22C38/00C22C38/24C22C38/46C21D8/02C23C2/06C23C2/12C22C38/58C21D8/0405C21D8/0421C22C38/26C22C38/28C22C38/38
Inventor 易红亮刘宏亮常智渊吴迪黄建王国栋
Owner NORTHEASTERN UNIV
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