Transactions of Materials and Heat Treatment

Title：Influence of die clearance on hot stamping process for high strength steel

Authors： Zou Wei Zhang Liqiang Liu Canjun

Unit： Hunan Financial & Industrial Vocational-Technical College Central South University of Forestry and Technology

KeyWords： high strength steel die clearance hot stamping numerical simulation temperature field martensite transformation

ClassificationCode：TG76

year,vol(issue):pagenumber：2017,42(11):37-41

Abstract：

A finite element model of the hot stamping for high strength steel was established under different die clearances by DEFORM software, and the influences of die clearances on temperature field and martensite transformation of steel sheet 22MnB5 were studied. The numerical simulation results indicate that the die clearance is the main factor influencing the temperature change of part, and the maximum temperature difference of part increases with the increase of die clearance and then decreases. Furthermore, the martensite in every part of sheet is homogenously generated and has a higher transformation rate while the die clearance is 0.95t-1.00t. Therefore, the hot stamping experiment was executed based on the numerical simulation results, and the temperature changes in the position of sidewall and bottom corner of part were tested. Finally, the microstructures of sheet were observed, a good agreement between numerical simulation and experimental results was verified, and the reliability and validity of numerical simulation results were 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(201510538010)

作者简介：邹伟（1991-），男，硕士研究生 E-mail：429606865@qq.com 通讯作者：张立强（1978-），男，博士，副教授 E-mail:zlq2k1103@126.com

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