理化检验-物理分册2025，Vol.61Issue(12)：67-71,5.DOI:10.11973/lhjy-wl240216
压盖连接螺栓断裂原因
Reason for the fracture of the gland connecting bolt
HUANG Haobo 1CHENG Dongsong 2GUO Junxiao 1KONG Mingxu 1ZHANG Qinying 2GUO Chaoyue1
作者信息
- 1. Henan Aerospace Precision Machining Co.,Ltd.,Xinyang 464000,China
- 2. Henan Aerospace Precision Machining Co.,Ltd.,Xinyang 464000,China||Henan Key Laboratory of Fastening Connection Technology,Xinyang 464000,China
- 折叠
摘要
Abstract
The connecting bolt of a 35Cr steel gland broke during operation.The cause of bolt fracture was analyzed using methods such as chemical composition analysis,macroscopic observation,metallographic examination,scanning electron microscopy and energy spectrum analysis,hardness testing,and finite element analysis.The results show that there was significant stress concentration in the local area of the bolt,and there was a phosphorus aggregation layer at the bottom of the thread.During the operation of the embedding machine,the bolt was subjected to alternating stress,caused microcracks appeared in the phosphorus aggregation layer at the bottom of the thread,ultimately leading to fatigue fracture of the bolt.关键词
35Cr钢/螺栓/磷聚层/应力集中/疲劳断裂Key words
35Cr steel/bolt/phosphorus aggregation layer/stress concentration/fatigue fracture分类
通用工业技术引用本文复制引用
HUANG Haobo,CHENG Dongsong,GUO Junxiao,KONG Mingxu,ZHANG Qinying,GUO Chaoyue..压盖连接螺栓断裂原因[J].理化检验-物理分册,2025,61(12):67-71,5.
