铝锭模具失效分析及对策  

Failure Analysis and Countermeasure of Aluminum Ingot Mold

作　　者：陈心 王丽阁[1] 王恩泽[1] CHEN Xin;WANG Li-ge;WANG En-ze(Southwest University of Science and Technology,Mianyang 621000,Sichuan,China)

机构地区：[1]西南科技大学,四川绵阳621000

出　　处：《铸造》2020年第7期769-773,共5页Foundry

摘　　要：某企业铝锭模具在使用过程中因表面龟裂、冲刷腐蚀坑和局部大裂纹而报废。通过金相检验、扫描电镜及能谱等手段对模具失效原因进行分析。结果表明:模具表面存在氧化脱碳现象,导致屈服强度与硬度下降,由此形成的热疲劳损伤与金属液冲刷腐蚀是造成模具失效的主要原因。根据失效特征,给出了相应的对策及措施。The aluminum ingot mold used in certain enterprise was scrapped due to surface cracks,erosion corrosion pits and local large cracks.The causes of damage were analyzed via metallographic examination,scanning electron microscopy and energy spectrum analysis.The results show that there is oxidative decarburization on the surface of the mold,resulting in a decrease in yield strength and hardness.The resulting thermal fatigue damage and metal liquid erosion corrosion are the main causes of mold failure.According to its failure characteristics,the corresponding countermeasures are given.

关 键 词：氧化脱碳 金属液冲刷 热疲劳损伤 

分 类 号：TG76[金属学及工艺—刀具与模具]