理化检验-物理分册2024，Vol.60Issue(2)：51-55,5.DOI:10.11973/lhjy-wl202402014
六角头螺栓断裂原因
Fracture reasons of hexagonal head bolt
王丽娜 1于永旺 2王顺花 1杨莉 2史伟2
作者信息
- 1. 兰州交通大学 材料科学与工程学院, 兰州 730070
- 2. 兰州兰石检测技术有限公司, 兰州 730314||甘肃省机械装备材料表征与安全评价工程研究中心, 兰州 730314
- 折叠
摘要
Abstract
When installing and fastening a hexagon head bolt,the fracture occurred at the lower fillet of the bolt head.The fracture causes of the hexagon head bolt were analyzed by means of macroscopic observation,chemical composition analysis,macroscopic examination,metallographic examination,mechanical property test,scanning electron microscope and energy spectrum analysis.The results show that there were defects in the head of the hexagon head bolt before leaving the factory,which led to stress concentration and quenching cracks during quenching.In the case of existing cracks,the bolt was subjected to external stress during installation,which caused the quenching crack to expand,resulting in the final fracture of the hexagon head bolt.关键词
六角头螺栓/淬火裂纹/二次开裂/生锈断口/42CrMoA钢Key words
hexagonal head bolt/quenching crack/secondary cracking/rust fracture/42CrMoA steel分类
矿业与冶金引用本文复制引用
王丽娜,于永旺,王顺花,杨莉,史伟..六角头螺栓断裂原因[J].理化检验-物理分册,2024,60(2):51-55,5.
