Analysis of Stamping Wrinkling and Necking Defects of 436L Stainless Steel
Author of the article:WANG Junwei;JIN Saite;JIANG Yanyan;LI Hui
Author's Workplace：Iron and Steel Research Institute,Gansu Jiu Iron and Steel Group Hongxing Co.,Ltd.,Jiayuguan 735100,China;School of Materials Science and Engineering,Shandong University,Jinan 250061,China
Key Words：436L stainless steel stamping forming wrinkling necking r-value
Abstract：According to the stamping wrinkling and necking defects of 436L stainless steel covering parts, the stamping forming stress analysis, microstructure and mechanical properties analysis were carried out. The results show that the low r value in the 40° direction of the 436L plate will leads to stamping wrinkling, and the small transition radius of the round corner of the punch leads to necking defects. After material performance improvement and mold optimization, the 45° direction r-value of 436L plate is increased to 1.02 and above, and the transition radius of the round corner of the mould is increased to 20 mm. Meanwhile, wrinkling and necking defects are eliminated.
