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提高热成形钢塑性的工艺研究
英文标题:Process research on improving hot stamping steel ductility
作者:王存宇 时捷 惠卫军 陈鹰 张英建 董瀚 
单位:钢铁研究总院 
关键词:热成形 马氏体 塑性 
分类号:TG306
出版年,卷(期):页码:2011,36(2):128-130
摘要:

塑性较低是传统马氏体钢热成形件的缺点之一。本文采用上模具水冷,下模具带温(200℃)的思路进行热成形试验,检测了热成形过程中的温度曲线和热成形件的微观组织和力学性能。结果表明,工件的冷却速度随模具温度的升高而降低,采用带温模具进行热成形,能够满足工件淬透性要求,获得全马氏体组织;还有利于提高工件的自回火能力,从而提高工件的屈服强度;同时,相对较低的冷却速度减小了钢的淬火内应力,使热成形件的塑性和强塑积得到明显提高。

Lower ductility is a disadvantage of traditional hot stamping steels. Water cooled punch and elevated temperature die (200 ℃) were employed to hot stamping, the temperature evolution during hot stamping was measured, the microstructure and mechanical properties were characterized. The results show that the cooling rate of blank decreases with the increasing of die temperature. The application of elevated temperature die could meet the requirement of quenching and fully martensite microstructuris obtained. The ability of self temper and the yield strength are improved. At the same time, the internal stress is reduced and the ductility and the product of tensile strength are improved clearly.

基金项目:
国家863资助项目(2009AA033401)、(2009AA03Z519)
作者简介:
参考文献:


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