Transactions of Materials and Heat Treatment

Title：Research on the formability of high-strength low-alloy steels HC500LA

Authors： Niu Chao1 2 Yang Bing1 2 Gao Yongsheng1 2 Tu Yanfeng1 2 Zhang Wen1 2

Unit： 1.BaoShan Iron & Steel Co. Ltd. . State Key Laboratory of Development and

KeyWords： high-strength low-alloy steels forming limit springback

ClassificationCode：

year,vol(issue):pagenumber：2015,40(7):23-28

Abstract：

The formability was studied for the high-strength low-alloy steels HC500LA produced by Baosteel. Firstly the basic mechanical property was obtained by tensile experiment, and then the formability characteristics at different strain states were studied by forming limit experiment. The results show that the elongation of HC500LA is 20% and the forming limit strain FLD0 approaches to 20%, which shows a good formability. The springback law was analyzed by U and V bending tests. The V bending test shows that the springback has a relationship with bend angel and punch radius. Furthermore, positive springback and negative springback happen in V bending. So the springback can be controlled by adjusting bend angel and punch radius properly. The U bending test shows that the blank holder force influences the springback, which can be reduced by adjusting the blank holder force. Finally, the material is used to produce the car seat slide which shows a good formability.

Funds：

牛超（1989-），男，硕士，助理工程师

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