理化检验-物理分册2018，Vol.54Issue(5)：364-367,4.DOI:10.11973/lhjy-wl201805014
H13钢挤压杆断裂失效分析
Failure Analysis on Fracture of an H13 Steel Extrusion Rod
朱晓红 1周滢1
作者信息
- 1. 无锡市产品质量监督检验院,无锡214101
- 折叠
摘要
Abstract
Fracture failure of an H13 steel extrusion rod for aluminum section occurred during normal operation,the causes of fracture failure were analyzed by means of chemical composition analysis,fracture macro and micro analysis,metallographic examination and hardness test.The results show that the transition arc between the extruded rod body and the rod seat was mistakenly processed into the run-out groove and formed stress concenfration.The extrusion rod was not fully tempered,and had high residual internal stress.The microstructure of the extruded rod was unstable,and the structure stress and anisotropy were produced in the segregation structure,which caused cracks in the edge of the run-out groove.Under the installation eccentric load,the bending fatigue fracture of the extruded rod occured in the initial stage of service.关键词
挤压杆/失效分析/成分偏析/共晶碳化物/交变载荷/应力集中Key words
extrusion rod/failure analysis/composition segregation/eutectic carbide/alternating load/stress concentration分类
矿业与冶金引用本文复制引用
朱晓红,周滢..H13钢挤压杆断裂失效分析[J].理化检验-物理分册,2018,54(5):364-367,4.
