Investigation on the microstructure and damage characteristics of wheel and rail materials subject to laser dispersed quenching
Investigation on the microstructure and damage characteristics of wheel and rail materials subject to laser dispersed quenching
复制标题
轮轨材料激光分散淬火组织及损伤特性研究
DOI：
10.1016/j.apsusc.2018.04.210
复制
发表时间：
2018-08
影响因子：
6.7
通讯作者：
Wang W.J.
中科院分区：
文献类型：
--
作者：
Cao X.;Shi L.B.;Cai Z.B.;Liu Q.Y.;Zhou Z.R.;Wang W.J.
Laser dispersed quenching (LDQ) forms isolated hardening zones distributed in a certain arrangement on the material surface. This study explores the microstructure, wear and rolling contact fatigue (RCF) of wheel and rail materials that have been treated by laser dispersed quenching. Through microstructure and surface hardness analysis, the optimum laser processing parameters of the wheel/rail materials are determined to be a laser power of 900 W and a laser quenching time of 0.6 s. Homogeneous martensite is obtained in the LDQ region of the wheel/rail rollers, and the surface hardness of the LDQ region significantly increases, which improves the wear resistance of wheel and rail materials. With an increase in LDQ spacing, the wear resistance and surface damage of the wheel/rail rollers deteriorate, and the optimum LDQ spacing is 0.3 mm. Severe spalling occurs on the surface of untreated wheel and rail rollers, while fatigue wear dominates in the LDQ region of the wheel and rail rollers. Meanwhile, small spalling is dominant in the substrate region between adjacent LDQ regions. Furthermore, the RCF life of wheel/rail rollers subject to LDQ is approximately 2 times that of untreated wheel/rail rollers under water condition.
登录
查看更多内容
影响因子：
4.8
作者：
L. Xue;M. Islam;G. McGregor
通讯作者：
L. Xue;M. Islam;G. McGregor
DOI：
10.1007/bf02649077
发表时间：
1995-04
期刊：
Metallurgical and Materials Transactions A
影响因子：
--
作者：
Huaming Wang;H. Bergmann
通讯作者：
Huaming Wang;H. Bergmann
DOI：
--
发表时间：
2002-02
期刊：
Railway Gazette international
影响因子：
--
作者：
A. Kapoor;F. Schmid;D. Fletcher
通讯作者：
A. Kapoor;F. Schmid;D. Fletcher
DOI：
10.1007/bf02647751
发表时间：
1996
期刊：
Metallurgical and Materials Transactions A
影响因子：
--
作者：
E. Taleff;C. Syn;D. Lesuer;O. Sherby
通讯作者：
E. Taleff;C. Syn;D. Lesuer;O. Sherby
影响因子：
8.4
作者：
A. Kaynar;S. Gündüz;M. Türkmen
通讯作者：
A. Kaynar;S. Gündüz;M. Türkmen