理化检验-物理分册2024，Vol.60Issue(7)：48-54,7.DOI:10.11973/lhjy-wl230202
随车吊机销轴断裂原因
Reasons for the fracture of the pin shaft of the truck mounted crane
闫贞 1邱康勇 1贺艳1
作者信息
- 1. 深圳市质量安全检验检测研究院,深圳 518029
- 折叠
摘要
Abstract
The pin shaft at the connection between the mechanical arm and the hydraulic rod of a truck mounted crane suddenly broke during operation.The causes of pin fracture were analyzed using methods such as macroscopic observation,chemical composition analysis,metallographic examination,hardness testing,scanning electron microscopy and energy spectrum analysis.The results show that during operation,cracks initiated at the stress concentration point on the outer surface of the pin shaft,and the cracks rapidly propagated along the circumferential direction of the hardened layer to both sides,eventually converged to form cracks around the surface.Under alternating loads,circumferential cracks propagated along the direction of the applied force,formed dual source fatigue cracking.When the remaining effective strength of the pin shaft was insufficient,the pin shaft experienced a one-time rapid fracture.关键词
随车吊机/销轴/断裂/淬硬层/显微组织Key words
truck mounted crane/pin shaft/fracture/hardening layer/microstructure引用本文复制引用
闫贞,邱康勇,贺艳..随车吊机销轴断裂原因[J].理化检验-物理分册,2024,60(7):48-54,7.
