金属热处理 ›› 2021, Vol. 46 ›› Issue (6): 253-255.DOI: 10.13251/j.issn.0254-6051.2021.06.050

• 失效分析 • 上一篇    下一篇

带式输送机减速机高速轴断裂失效分析

谭晓蒙, 田峰, 乔欣, 郭心爱   

  1. 内蒙古电力科学研究院, 内蒙古 呼和浩特 010020
  • 收稿日期:2021-01-13 出版日期:2021-06-25 发布日期:2021-07-21
  • 作者简介:谭晓蒙(1993—),男,工程师,硕士,主要研究方向为电力设备无损检测与失效分析,E-mail:tanxmfocus@foxmail.com。
  • 基金资助:
    2020年内蒙古电力科学研究院科技项目(2020-ZC-04)

Cracking failure analysis on a high speed shaft of belt conveyor reducer

Tan Xiaomeng, Tian Feng, Qiao Xin, Guo Xin'ai   

  1. Inner Mongolia Electric Power Science & Research Institute, Hohhot Inner Mongolia 010020, China
  • Received:2021-01-13 Online:2021-06-25 Published:2021-07-21

摘要: 某输煤系统带式输送机减速机的18CrNiMo7-6钢制高速轴发生早期断裂。为此对失效轴进行宏观分析、断口扫描电镜及能谱分析、金相分析、硬度分析、冲击韧性分析和化学成分分析。结果表明,该失效轴断裂性质为多源疲劳断裂,疲劳源位于键槽尖端,高速轴未经正确的表面强化热处理是导致其发生早期断裂的重要原因。

关键词: 带式输送机减速机, 高速轴, 18CrNiMo7-6钢, 疲劳断裂, 表面热处理

Abstract: Early fracture of the 18CrNiMo7-6 steel high speed shaft of belt conveyor reducer in a coal conveying system occurred, thus the failure analysis were carried out by using macroscopic, metallographic, chemical composition, SEM, and EDS analyses, as well as hardness and impact tests. The results show that the shaft fracture is of multi-source fatigue type, the fatigue source is located at the tip of key slot, and the early fracture of high-speed shaft is caused by without of proper surface strengthening heat treatment.

Key words: belt conveyor reducer, high speed shaft, 18CrNiMo7-6 steel, fatigue fracture, surface heat treatment

中图分类号: