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

doi:10.13251/j.issn.0254-6051.2021.06.050

Abstract

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

CLC Number:

TG156.3

Tan Xiaomeng, Tian Feng, Qiao Xin, Guo Xin'ai. Cracking failure analysis on a high speed shaft of belt conveyor reducer[J]. Heat Treatment of Metals, 2021, 46(6): 253-255.

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

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