理化检验-物理分册2026，Vol.62Issue(6)：1-4,4.DOI:10.11973/lhjy-wl260043
42CrMo钢螺栓表面线性缺陷产生原因
Reasons for linear defects on the surface of 42CrMo steel bolts
潘恒沛 1刘岩 1王珂 1林地 2杨晓 3李雪峰1
作者信息
- 1. 洛阳船舶材料研究所,洛阳 471023
- 2. 沈阳飞机工业集团有限公司,沈阳 110000
- 3. 洛阳船舶材料研究所,洛阳 471023||海洋腐蚀与防护全国重点实验室,洛阳 471023
- 折叠
摘要
Abstract
The 12.9-grade galvanized bolts used in marine equipment were found to have linear defects distributed along the axial direction on their surfaces during service.Macroscopic observation,chemical composition analysis,mechanical property testing,scanning electron microscopy and energy spectrum analysis,and metallographic examination were employed to analyze the causes of the linear defects on the bolt surfaces.The results show that the linear defects in the bolts originated from folding defects in the bolt rod material during production.The folds were filled with oxides,with decarburization occurring on both sides.During the bolt manufacturing process,surface defects were not removed,leading to their retention on the bolt surfaces.Subsequently,during the quenching and cooling process,the fold tips expanded,ultimately forming deep quenching cracks.关键词
镀锌层/高强螺栓/线性缺陷/折叠/淬火裂纹Key words
galvanized layer/high-strength bolt/linear defect/fold/quenching crack分类
通用工业技术引用本文复制引用
潘恒沛,刘岩,王珂,林地,杨晓,李雪峰..42CrMo钢螺栓表面线性缺陷产生原因[J].理化检验-物理分册,2026,62(6):1-4,4.
