Transactions of Materials and Heat Treatment

Title：Influence of non-uniform temperature field on hot stamping formability of high strength steel

Authors： Tan Hailin Lai Chunming

Unit： Hunan Chemical Industry Vocation Technology Institute

KeyWords： hot stamping non-uniform temperature field high strength steel 25MnB5 stamping rate friction coefficient

ClassificationCode：TG386

year,vol(issue):pagenumber：2015,40(9):32-36

Abstract：

For the problem of fracture defect at the groove lateral of the component made of high strength steel 25MnB5 in hot deep drawing process, the non-uniform temperature field of the U-shaped workpiece during hot stamping process was simulated by the dynamic FEM software ANSYS/LS-DYNA. It was analyzed the influences of stamping rate and friction coefficient between the blank and the die on the temperature field. The results show that high stamping rate and small friction coefficient are helpful to form a more uniform temperature field of the component and can reduce the possibility of fracture defect at the groove lateral. When the optimized process parameters such as stamping rate 300 mm·s-1 and friction coefficient 0.15 are used in the hot stamping process, the good quality produces can be obtained and the reliability of their simulation results can be assured.

Funds：

湖南省科技计划项目（2014GK3059）；湖南省教育厅科学科研项目（15C0468）

谭海林（1968-），男，硕士，副教授

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