Integrated Modelling of Microstructure Evolution and Mechanical Properties Prediction for Q&P Hot Stamping Process of Ultra‑High Strength Steel

作     者：Yang Chen Huizhen Zhang Johnston Jackie Tang Xianhong Han Zhenshan Cui Yang Chen;Huizhen Zhang;Johnston Jackie Tang;Xianhong Han;Zhenshan Cui

作者机构：Institute of Forming Technology&EquipmentSchool of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200030China National Engineering Research Center of Die and Mold CADShanghai Jiao Tong UniversityShanghai 200030China. 

出 版 物：《Chinese Journal of Mechanical Engineering》 (中国机械工程学报（英文版）)

年 卷 期：2020年第33卷第3期

页      面：160-173页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

基　　金：Supported by National Natural Science Foundation of China (Grant Nos. 51775336,U1564203) Program of Shanghai Academic Research Leadership (Grant No. 19XD1401900) 

主　　题：Q&P hot stamping Phase transformation model Microstructure evolution Product properties prediction 

摘      要：High strength steel products with good ductility can be produced via Q&P hot stamping process,while the phase transformation of the process is more complicated than common hot stamping since two-step quenching and one-step carbon partitioning processes are *** this study,an integrated model of microstructure evolution relating to Q&P hot stamping was presented with a persuasively predicted results of mechanical *** transformation of diffusional phase and non-diffusional phase,including original austenite grain size individually,were considered,as well as the carbon partitioning process which affects the secondary martensite transformation temperature and the subsequent phase ***,the mechanical properties including hardness,strength,and elongation were calculated through a series of theoretical and empirical models in accordance with phase ***,a modified elongation prediction model was generated ultimately with higher accuracy than the existed Mileiko’s *** the end,the unified model was applied to simulate the Q&P hot stamping process of a U-cup part based on the finite element software LS-DYNA,where the calculated outputs were coincident with the measured consequences.