理化检验-物理分册Issue(11)：827-829,832,4.DOI:10.11973/lhjy-wl201511020
40Cr钢齿轴的断裂原因分析
Cause Analysis on Fracture of 40Cr Steel Gear Shaft
金林奎 1陈晓东 2赵建国 1王春亮1
作者信息
- 1. 合肥市建元机械有限责任公司，合肥 230001
- 2. 温州市乐格机械有限公司，温州 325000
- 折叠
摘要
Abstract
The 40Cr steel gear shaft was fractured incipiently during use.The fracture cause of the gear shaft was analyzed by macrographic inspection,chemical composition analysis and metallographic inspection.The results show that during the machining process,the flanging and curling scrap was generated on the surface of gear shaft due to too large cutting depth or blunt cutting tool. The surface grain shed down and cutting extrusion produced the microcrack. Meanwhile,too much nonmetallic inclusions existed in the raw material.As the result of it,the strength degraded and the brittlement increased significantly,and cracks were formed due to quenching stress concentration.The cracks continued to expand under the service load,and eventually led to the fracture failure of the gear shaft.关键词
40Cr钢/齿轴/断裂/非金属夹杂物/应力集中Key words
40Cr steel/gear shaft/fracture/nonmetallic inclusion/stress concentration分类
矿业与冶金引用本文复制引用
金林奎,陈晓东,赵建国,王春亮..40Cr钢齿轴的断裂原因分析[J].理化检验-物理分册,2015,(11):827-829,832,4.
