Transactions of Materials and Heat Treatment

Title：Simulation on hot stamping of high strength steel 22MnB5 based on Dynaform

Authors： Zhang Liqiang Liu Ting Zheng Wenhui Hu Hao Zhong Zhigang

Unit： Central South University of Forestry and Technology Hunan Normal University Sunrise Auto Mould & Die Co. Ltd.

KeyWords： hot stamping simulation high strength steel boundary condition thickness reduction rate

ClassificationCode：TG306

year,vol(issue):pagenumber：2015,40(8):34-40

Abstract：

The finite element analysis is an essential step for the sake of cost saving when designing hot stamping processes. The quality of the numerical simulation results is strongly dependent on the accuracy of material model and boundary conditions used in FE models. For the high strength steel 22MnB5, the material model and thermal boundary conditions were obtained from thermal simulation experiments and thermal analysis between the part and the die during hot stamping, and after that the accuracy of numerical simulation was improved. Therefore, these provide references for the quality control of hot stamping parts. The numerical simulation results show that the thickness reduction rates of sheet metal are in uneven distribution during hot stamping. The maximum thickness reduction rate occurs on the sidewall of the part nearby the flange billet. However, the thickness reduction rates are smaller in the flange and the bottom. The simulation result is in good agreement with the experimental result. Furthermore, the validity and reliability of the hot stamping simulation are verified.

Funds：

湖南省教育厅资助科研项目(13B145)；湖南省大学生研究性学习和创新性实验计划项目；湖南省高校科技创新团队支持计划资助

张立强（1978-），男，博士，副教授

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