The influence of deformation history on microstructure and microhardness during the hot stamping process of boron steel B1500HS
The influence of deformation history on microstructure and microhardness during the hot stamping process of boron steel B1500HS
复制标题
硼钢B1500HS热冲压过程变形历史对显微组织和显微硬度的影响
DOI：
10.1504/ijmpt.2013.058935
复制
发表时间：
2013-01-01
影响因子：
0.5
通讯作者：
Zheng, Wei
中科院分区：
文献类型：
--
作者：
Tang, Bingtao;Wang, Qiaoling;Zheng, Wei
为了满足节能和车辆安全的要求，一种称为定制回火的新型热冲压工艺可用于制造具有功能优化机械性能的部件。了解可淬超高强度钢的转变动力学及其如何受到相关工艺参数的影响至关重要。研究了变形历史对硼钢B1500HS金相和显微硬度的影响。可以看出，真实染色对实际冷却速率产生负面影响。随着真实染色的发展，马氏体转变温度下降。较高的应变率会导致较小的显微硬度值，而较高的真实染色会导致 TTT 图中“鼻子”的位置发生变化。考虑不同工艺参数对相变动力学影响的结果有助于研究硼钢的变形动力学和相变行为。
To meet the requirements of energy saving and vehicle security, a novel hot stamping process named tailored tempering can be used to manufacture components with functional optimised mechanical properties. It is essential to know the transformation kinetics of the quenchable ultra-high strength steels and how it is influenced by related process parameters. The influence of deformation history on metallographic and microhardness of boron steel B1500HS is investigated. It can be seen that the true stain exerts a negative influence on actual cooling rate. With the development of true stain, the martensite transformation temperature goes down. The higher strain rate leads to a smaller value of microhardness, while the higher true stain can cause a shift of the position of the ‘nose’ in the TTT-diagram. The results considering the influence of the transformation kinetics by different process parameters can help to investigate the deformation kinetics and transformation behaviour of boron steels.