组合冷压凹模早期失效分析  

Analysis on Early Failure of the Cold Stamping Compound Dies

作　　者：殷国军 何晓东[2] 秦莉[1] 王志亮[2] 

机构地区：[1]天津市成套设备工程监理有限公司,天津300384 [2]河北工业大学机械学院,天津300130

出　　处：《机械制造与自动化》2008年第4期80-82,90,共4页Machine Building & Automation

摘　　要：由冷压凹模断口形貌失效分析结果表明,凹模内壁微小裂纹属于疲劳裂纹,同时凹模材质CrWMn钢中的所存在的碳化物不均匀性诱发了裂纹的产生,导致模具在低周疲劳状态下发生断裂失效。针对某型组合冷压凹模材质热处理工艺缺陷提出改进建议,使得凹模CrWMn钢的最终组织得到改善,强韧性明显提高,从而有效解决了组合凹模早期断裂失效问题。The fracture analysis result of the failure cold stamping female die shows that the little crack of the cold stamping die belongs to fatigue crack, and that at the same time the non-uniform distribution of the carbide can introduce the crack origination and the low-cycle fatigue rupture failure of die. This paper offers the improvement on the heat treatment method of the cold stamping female die, which improves the final structure of the CrWMn steel and increases the strength and toughness of the steel. So the early failure problem of the cold stamping female die is effectively solved.

关 键 词：冷压凹模 失效分析 疲劳裂纹 碳化物 

分 类 号：U446.1[建筑科学—桥梁与隧道工程]