【摘要】 为了探明多道次拉深电池壳表面产生颈缩纹的原因及其对3003铝合金板料力学性能的影响,对3003铝合金多道次拉深进行了显微组织分析,并对其原材料3003铝合金进行力学性能、金相组织、化学成分以及原材料生产过程分析.研究结果表明:有颈缩纹缺陷的电池壳原材料的晶粒组织粗大且不均匀,其板料延伸率明显偏低.由于3003铝合金板料生产过程中退火温度过高、保温时间过长而形成的不均匀粗晶导致了多道次拉深时变形不均匀,最终表现为颈缩纹,而延伸率是影响颈缩纹形成和反映颈缩纹材料特征的参量之一.更多还原

【Abstract】 In order to find out the cause of necking phenomenon on the surface of multi-pass drawing battery shell and its influence on the mechanical properties of 3003 aluminum alloy sheet metal,the microstructure of 3003 aluminum alloy multi-pass drawing,and the mechanical properties,metallographic structure,chemical composition and raw material production process analysis of 3003 aluminum alloy,were analyzed.The results showed that the grain structure of the battery shell with necking defect was coarse and uneven,and the elongation of sheet metal was obviously low.Because the annealing temperature of 3003 aluminum alloy sheet metal was too high and the holding time was too long,the non-uniform coarse grain leaded to non-uniform deformation during the multi-pass drawing,and the elongation was one of the factors that affected the formation of neck indentation and reflected the characteristics of neck indentation material.更多还原