金属加工（热加工）Issue(6)：50-53,4.
40Cr钢紧固轴疲劳断裂原因分析及改进
Analysis and improvement of fatigue fracture reasons for 40Cr steel screw bolt
庞维彬 1郑东方 1潘冬 2侯震彪 1刘志伟1
作者信息
- 1. 铁设(济南)电气设备有限公司 山东济南 250200
- 2. 济南铁路物资工业集团有限公司 山东济南 250001
- 折叠
摘要
Abstract
A batch of 40Cr steel screw bolt broke continuously early during the fatigue test,failing to meet the required times of test.In order to explore the cause of this batch of fastening shaft fracture,the fracture component analysis,hardness detection,macro fracture analysis and scanning electron microscope,metallographic tissue detection and thread contour measurement,the results show that the thread of fastening shaft bottom transition arc radius R≤0.07mm,and the alignment more than 6 level unqualified,resulting in the fastening shaft fatigue test thread root stress concentration formed subtle cracks and gradually expand and fracture.Through analysis and discussion,the improvement measures are formulated and the production process of the fastening shaft is strictly controlled,and finally the mechanical properties of the fastening shaft meet the technical requirements.关键词
紧固轴/疲劳断裂/应力集中/过渡圆弧Key words
screw bolt/fatigue fracture/stress concentration/transition arc引用本文复制引用
庞维彬,郑东方,潘冬,侯震彪,刘志伟..40Cr钢紧固轴疲劳断裂原因分析及改进[J].金属加工（热加工）,2024,(6):50-53,4.
