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436L不锈钢冲压起皱和颈缩缺陷分析
Analysis of Stamping Wrinkling and Necking Defects of 436L Stainless Steel
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- DOI:
- 作者:
- 王军伟 靳塞特 蒋妍彦 李辉
WANG Junwei;JIN Saite;JIANG Yanyan;LI Hui
- 作者单位:
- 酒钢集团宏兴股份公司钢铁研究院 山东大学材料学院
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
- 关键词:
- 436L不锈钢 冲压 起皱 颈缩 r值
436L stainless steel stamping forming wrinkling necking r-value
- 摘要:
- 针对436L不锈钢覆盖件冲压起皱和颈缩缺陷,进行了冲压成形应力分析、金相组织和材料力学性能分析。结果表明,436L板材40°方向的r值较低导致起皱,凸模圆角过渡半径偏小导致颈缩。经过材料性能改进和模具优化,将436L板材45°方向r值提高至1.02以上,将凸模圆角过渡半径增加至20 mm,同时消除了起皱和颈缩缺陷。
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.