Transactions of Materials and Heat Treatment

Title：Numerical analysis of B pillar hot stamping

Authors： ZHANG Zhi-qiang

Unit： Research and Development Center of Wuhan Iron and Steel (Group) Corperation Huazhong University of Science and Technology Jilin University

KeyWords： ultra high strength steel hot stamping thermo-mechanical coupling numerical analysis

ClassificationCode：TH16

year,vol(issue):pagenumber：2010,35(3):57-60

Abstract：

Hot stamping is a new technology for forming ultra high strength steel sheet. The temperature distribution of the blank during the process is very important for designing the tools with necessary cooling capability. The hot stamping FE model of the B pillar was built. Through the thermo-mechanical coupling analysis, the temperature and thickness distribution of the blank was obtained. The forces of hot stamping and cold stamping were compared. The results show that the temperature in the holding area of the blank decreases quickly. It will not affect the formability of blank because the temperature in this area is above 600 ℃. The higher temperature area lies in the tail round corner. Because of high temperature, local flow and thinning will happen in this area. Therefore, fast cooling in the high temperature is needed for high quality part. The force of hot stamping is about one tenth of that of cold stamping.

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Reference：

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