Solution of Interfacial Heat Transfer Coefficient for the High Strength Press-hardening Steel
The high-strength automotive structural part was obtained by the press-hardening technology including three main treatments,such as heating for complete austenization,stamping and quenching.The interfacial heat transfer coefficient (IHTC),as an important thermal-physical factor,demonstrated heat transfer degree between die and part,and determined directly the real-time temperature field distribution of part during the stamping and quenching treatment,as well as further influenced the strength and ductility of part.This paper presents a hot stamping experimentation and three methods for calculating the IHTC of 22MnB5 boron steel.Comparison of the calculation results shows an average error of 7.5% for the heat balance method,10.3% for the finite-element-analysis based optimization method (the FEM method),and 3.7% for the Becks nonlinear inverse estimation method (the Becks method).The Becks method was optimal for solving IHTC during hot forming.By contrast,the FEM method was worst because a constant IHTC was assumed without considering the variation of IHTC.
hot forming interfacial heat transfer coefficient high strength steel non-linear estimation method
LI Xiaodong HAN Shuo CHANG Ying WANG Cunyu HU Ping
School of Automotive Engineering, Dalian University of Technology,Dalian 116024, Liaoning, China East China Branch of Central Iron & Steel Research Institute(CISRI), Beijing 100081, China
国际会议
成都
英文
207-209
2016-11-16（万方平台首次上网日期，不代表论文的发表时间）