The causes of crack for cold-working die are analyzed by checking machining technique and observing the microscopic structure,the technical measures to prevent cracks are put forwarded in the paper.

• 通过对弯曲件冷冲模各加工工艺和金相显微组织的分析,分析了冷冲模产生裂纹的原因,并提出了防止裂纹产生的工艺措施。