广泛应用的LY12M 铝合金板材在冷加工成型零件时常因产生裂纹而大量报废。研究结果证明这是由于板材退火不当所致。部分板材退火不足,工艺塑性过低,组织上未完全再结晶,成型变形量较大的零件,就会破裂。利用本文研究得出的补充退火工艺,可以通过对板材的处理,完全消除冷加工成型裂纹,制成优质零件。 Widely used LY12M aluminum alloy sheet in the cold forming parts often cracked due to a large number of scrapped. The results show that this is due to improper sheet annealing. Part of the sheet annealing, plastic low process, the organization is not fully recrystallized, forming a larger deformation of the parts, it will rupture. Using the supplementary annealing process obtained in this study, we can make high-quality parts through the processing of the plate to completely eliminate cold forming cracks.