Transactions of Materials and Heat Treatment

Title：Stamping process of advanced 980QP high strength steel

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ClassificationCode：TG386

year,vol(issue):pagenumber：2019,44(4):64-68

Abstract：

980QP steel with higher strength grade was selected, and its performance characteristics were compared with the ordinary DP steel. The results show that the elongation of 980QP steel is obviously better than that of 980DP steel, even better than that of 780DP steel with lower strength grade. Based on the above theoretical analysis, the stamping formability analysis and actual stamping production verification of two kinds of materials were carried out by selecting typical parts of an automobile. The results show that compared with the ordinary high strength steel with the same strength grade, the elongation of 980QP steel is increased by about one time, and its formability is much better, even comparable to 590DP steel with lower strength grade. The validation results are in good agreement with the theoretical analysis results mentioned above, and it is proved that 980QP steel can be used to produce automobile body structure parts with relatively complex shape which needs to be machined by drawing process. At the same time, the springback of 980QP steel is more serious, and the springback of test part is far more than that of CAE analysis, which should be paid more attention in the previous process analysis and die design.

Funds：

国家科技重大专项（2014ZX04002041）

王淑俊（1984-），女，硕士，工程师 E-mail：shujun0306@163.com

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