Transactions of Materials and Heat Treatment

Title：Influence of pre-forming amount on forming quality of parts in indirect hot forming

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ClassificationCode：TG156

year,vol(issue):pagenumber：2023,48(9):49-55

Abstract：

In order to better grasp the indirect hot forming technology, for 22MnB5 steel material, the indirect hot forming process of box-shaped parts was studied by combining two methods of numerical simulation and experiment, and the influence of pre-forming amount on the forming quality of parts and the design principles of pre-forming amount were discussed. The results show that in indirect hot forming, when the stamping stroke is used as the designed reference object of the pre-forming amount, the box-shaped parts satisfy the law that the maximum thinning rate gradually decreases with the increasing of the pre-forming amount, and when the pre-forming amount is ≥90%, the part formability is better and the thickness distribution is more uniform. For the indirect hot forming, the role of the final forming is more about shaping and forming local features of pre-formed sheet. In addition, different pre-forming amounts do not have a significant effect on the mechanical properties of part.

Funds：

吉林省科技厅项资助目(20160204058GX)

作者简介：汤梓铭（1991-），女，博士研究生 E-mail：zimingtang24@163.com 通信作者：谷诤巍（1970-），男，博士，教授 E-mail：guzhengweijlu@163.com

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图9不同预成形量下的成形试验件显微组织

（a）90%（b）100%

Fig.9Microstructures of formed test parts under different preforming amounts

图10成形试验件工程应力-工程应变曲线

Fig.10Engineering stressengineering strain curves of formed test parts

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