线材轧机链板失效分析  

Wire Mill Chain - Slab Failure analysis

作　　者：朱鲁玲[1] 虞敌卫[1] 张国星[1] 

机构地区：[1]宝山钢铁股份有限公司分析测试研究中心,上海200941

出　　处：《物理测试》2001年第5期29-31,共3页Physics Examination and Testing

摘　　要：通过对链板断裂件进行金相组织、断裂形貌分析,发现链板断裂原因是链板热处理时淬火冷却速度不够,在组织中出现沿晶界分布的铁素体,导致强度下降。在机械应力作用下,使链板在短期内发生脆性断裂。By metallographic and fractographic analysis on a fractured chain - slab workpiece, the failure reason of the workpiece is found. It is because the quench - speed of the workpiece isn' t rapid enough to avoid the formation of the intergranular ferrite, and the formation of the intergranalar ferrite leads to intensity decreased. In the end, the chain - slab workpiece fractures under stress during a short period of time.

关 键 词：冷却速度 沿晶铁素体 脆性断裂 线材轧机 链板 失效分析 

分 类 号：TG333[金属学及工艺—金属压力加工]