理化检验-物理分册2026，Vol.62Issue(4)：62-65,4.DOI:10.11973/lhjy-wl240331
M27双头螺栓断裂原因
Fracture reason of M27 double-head bolt
吕渊1
作者信息
- 1. 上海材料研究所有限公司,上海 200437
- 折叠
摘要
Abstract
Two M27 double-head bolts fractured during the installation.The causes of bolt fracture were analyzed by means of macroscopic observation,chemical composition analysis,mechanical property test,scanning electron microscope and energy spectrum analysis,metallographic examination.The results show that there were hydrogen embrittlement cracks in the double-headed bolts before the galvanizing process,which led to one-time fracture under the action of external force when the bolts vere installed.The high hardness and strength of the double-headed bolt led to the increase of the hydrogen embrittlement sensitivity of the material,which further increased the risk of hydrogen embrittlement cracking.关键词
双头螺栓/氢脆/硬度/强度/断裂Key words
double-head bolt/hydrogen embrittlement/hardness/strength/fracture分类
矿业与冶金引用本文复制引用
吕渊..M27双头螺栓断裂原因[J].理化检验-物理分册,2026,62(4):62-65,4.
