理化检验-物理分册2025，Vol.61Issue(1)：30-32,3.DOI:10.11973/lhjy-wl230281
Q235B钢次级结构焊接件疲劳断裂原因
Causes of fatigue fracture of weldment of Q235B steel secondary structure
邹文奇 1陈思敏1
作者信息
- 1. 豪氏威马(中国)有限公司,漳州 363105
- 折叠
摘要
Abstract
The fracture of a Q235B steel secondary structure weldment occurred after long-distance transportation.The causes of the fracture of the weldment were analyzed by means of macroscopic observation,chemical composition analysis,mechanical property test and metallographic examination.The results show that the content of Mn element and tensile strength of the raw materials of the secondary structural parts exceeded the standard requirements.There were cracks in the secondary structure weldment during welding,and the cracks further expanded after mechanical impact.In the process of long-distance transportation,under the action of periodic fatigue stress,the fatigue fracture of the structure occurred.关键词
Q235B钢/次级结构焊接件/疲劳断裂/应力/显微组织Key words
Q235B steel/secondary structure weldment/fatigue fracture/stress/microstructure分类
通用工业技术引用本文复制引用
邹文奇,陈思敏..Q235B钢次级结构焊接件疲劳断裂原因[J].理化检验-物理分册,2025,61(1):30-32,3.
