Effect of putrefied quenching oil on the transformation behaviour of railway spring steel.

Conference of the South African Advanced Materials Initiative 2018

Matjeke, V.J.^1,2 ; Mukwevho, G.^1 ; Van Der Merwe, J.W.^2,3

Transnet Engineering, Research and Development, Private Bag X 528, Kilnerpark

0127, South Africa^1

School of Chemical and Metallurgical Engineering, University of the Witwatersrand, Private Bag X3, Johannesburg, Wits

2050, South Africa^2

DST-NRF Centre of Excellence in Strong Materials, University of the Witwatersrand, Private Bag X3, Johannesburg, Wits

2050, South Africa^3

关键词: Failure mechanism;    Heat treatment process;    Investigation process;    Premature failures;    Quenching Oil;    Rail vehicles;    Safe operation;    Safety critical components;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/430/1/012043/pdf
DOI  :  10.1088/1757-899X/430/1/012043

来源: IOP

【 摘 要 】

Bogie springs are safety critical components that also provide a smooth ride to the rail vehicle by absorbing vibrations and shock loads during the movement of the train. This study investigates the cause of premature failure of springs. These springs were manufactured from a high strength steel grade, SAE J404 grade 5160. The investigation process focused on heat treatment processes and failure mechanisms. Oil properties were also scrutinised by conducting quench tests. The overall findings of the investigation highlighted the detrimental effect of a degraded quenching oil on the fatigue life of the springs. Implementing certain measures from these findings will increase the spring lifespan and contribute towards safe operation of the trains.