|
摘要：
|
|
在淬火热冲压工艺中,超高强度钢板在热冲压过程的传热情况直接影响着板料的塑性成形能力及成形零件的力学性能。本文运用传热学基本理论对淬火热冲压成形过程中的传热进行分析,根据其传热特点将钢板与外界的传热过程分为3个阶段:与空气传热、与模具传热以及与空气和模具混合传热,建立了各阶段的解析模型,然后通过热冲压成形试验对该模型的正确性进行了验证。结果表明,热冲压过程中钢板温度呈指数变化,所提出的解析模型与试验研究结果吻合,能够比较真实地反映钢板温度的变化规律,为淬火热冲压成形工艺的深入研究与应用提供必要而可靠的依据。
|
|
In the hot stamping and quenching process of ultra high strength steels,the formability and the final mechanical property of the steels are directly influenced by the heat transfer condition between the blank and the die.The heat transfer of the blank in the hot stamping and quenching process was analyzed by analytical method.According to the heat transfer behavior of the steels,the whole heat transfer process was divided into three phases:transfer to air,transfer to die and the mix of air and die.The analytical model was proposed to describe the relationship between the temperature change and time in different phases and verified by experimental investigation.Results show that there is acceptable agreement between the analytical model and the experimental results,and the temperature of steel blank calculated by the proposed model can reflect the law of the steels temperature change during hot stamping process.The proposed model will provide necessary and reliable basis for the further investigation and application of the hot stamping and quenching process.
|
|
基金项目：
|
|
上海汽车工业发展基金资助项目(0415)
|
|
作者简介：
|
|
|
|
参考文献：
|
[1]Suehiro M,Kusumi K,Miyakoshi T,et al.Properties ofaluminum-coated steels for hot-forming[J].Nippon SteelTechnical Report,2003,(88):295-415.
[2]Geiger M,Merklein M,Hoff C.Basic investigation on thehot stamping steel 22MnB5[A].Proceedings of the SheetMetal 2005 Conf.[C].Switzerland,2005.
[3]谭志耀,田浩彬,倪峰,等.硼钢板高温拉伸性能研究[J].理化检验:物理分册,2006,42(2):63-65.
[4]赵以贤,毕小平,刘西侠,等.基于集总参数法的车用内燃机传热计算机仿真研究[J].内燃机学报,2003,21(4):239-243.
[5]张洪济.热传导[M].北京:高等教育出版社,1992.
[6]朱德才,张立文,裴继斌,等.固体界面接触换热系数影响因素的实验研究[J].锻压技术,2008,33(1):139-142.
[7]朱巧红,鲍文华,倪锋,等.USIBOR1500超高强度板热成形模具冷却系统设计[J].机械设计,2006,(增刊):106-108.
|
|
服务与反馈：
|
|
【文章下载】【加入收藏】
|
|
|
|
