Transactions of Materials and Heat Treatment

Title：Experimental comparative analysis for influence of punch speed on bulging performance of DP780 dual phase steel and 304 stainless steel

Authors： Cheng Lingxia Cao Yanggen Deng Peiran Su Yu

Unit： Shanghai University of Engineering Science

KeyWords： punch speed cupping test bulging performance

ClassificationCode：TG386.1

year,vol(issue):pagenumber：2015,40(2):145-147

Abstract：

The cupping tests of 1 mm sheet metal for dual phase steel DP780 and 304 stainless steel were carried out using Komatsu servo press with controlled speed. The influence of punch speed on the test results was studied based on the test Er value (Erichsen value)obtained from the cupping test. Comparing the test result of DP780 dual phase steel to the one of 304 stainless steel, it is found that when the punch speed increases from 3 mm·s-1 to 30 mm·s-1 during the process, the Er value of 304 stainless steel reduces from 9.39 mm to 8.59 mm, and the Er value of dual phase steel decreases from 7.53 mm to 7.39 mm. Therefore, the influence of punch speed on the bulging performance of material is confirmed by the results above, that is,the Er value and resistance to rupture of material reduce gradually with the increasing punch speed within 3-30 mm·s-1, which means that bulge forming performance of material decreases.

Funds：

国家自然科学基金资助项目（051301105）

程令霞（1987-），女，硕士研究生

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