水压机夹钳臂断裂原因的分析
Anhui Metallurgy(2013)
Abstract
对ZG35II夹钳臂进行解剖分析,判断其失效原因。夹钳臂晶粒粗大,为沿晶韧窝型断裂,晶界上有大量细小的硫化物析出,存在魏氏组织。不良的组织状态是导致夹钳臂断裂的主要原因。晶粒粗大和晶界上硫化物的析出,表明该工件可能存在锻造过热情况。锻造过热使材料机械性能变差,并无法通过后续的热处理消除。
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Key words
overheating Widmanstaten structure intercrystalline dimple fracture
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