Transactions of Materials and Heat Treatment

Title：Crack and springback control of ultra high strength steel QP980 parts based on CAE

Authors： Chen Donghui1 2 Zhang Jian1 2

Unit： (1.Research Institute BaoShan Iron & Steel Co. Ltd. Shanghai 201900 China 2.State Key Laboratory of Development and Application Technology of Automotive Steels Shanghai 201900 China)

KeyWords： ultra high strength steel crack springback CAE analysis Sigma

ClassificationCode：TG386

year,vol(issue):pagenumber：2018,43(5):0-0

Abstract：

In view of the cracking and instability of springback control of the front floor reinforced rail parts of an automobile in the application process of

ultra high strength steel QP980, the whole process was simulated and evaluated with AUTOFORM software and its Sigma analysis function. The key influencing factors were found out by comprehensively analyzing of the problems,and the optimized process was raised and verified by actual stamping test. The results show that the maximum thinning rate of parts is reduced by 7.3%, and the springback quantity is controlled within a reasonable range. The stamping cracking is eliminated, and the dimensional accuracy is up to 1 mm, meeting the control requirement. The formability and springback of parts were improved by the optimized process, and the correctness of CAE analysis was verified. This method has a guiding significance for the following application of ultra high strength steel parts.

Funds：

作者简介：陈东辉（1982-），男，硕士，工程师 Email：chendonghui@baosteel.com

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