理化检验-物理分册2024，Vol.60Issue(6)：37-41,5.DOI:10.11973/lhjy-wl240087
SCM435钢摇臂螺栓断裂原因
Causes of fracture of SCM435 steel rocker bolt
吕金峄 1王勤 1李亚洲 1贾川 1郭明仪1
作者信息
- 1. 济源钢铁(集团)有限公司,济源 459000
- 折叠
摘要
Abstract
The SCM435 steel rocker bolt of an automobile engine fractured during the test.The causes of bolt fracture were analyzed by means of macroscopic observation,chemical composition analysis,metallographic examination,hardness test,scanning electron microscopy analysis.The results show that the chemical composition and hardness of the rocker bolt met the product requirements,and the microstructure was normal.The rocker bolt was eccentrically loaded during use,and it bore abnormal bending stress exceeding its fatigue strength,which eventually led to fatigue fracture of the material.关键词
SCM435钢/摇臂螺栓/弯曲应力/显微组织/偏载/断裂Key words
SCM435 steel/rocker bolt/bending stress/microstructure/eccentric load/fracture分类
矿业与冶金引用本文复制引用
吕金峄,王勤,李亚洲,贾川,郭明仪..SCM435钢摇臂螺栓断裂原因[J].理化检验-物理分册,2024,60(6):37-41,5.
