Effect of normalisation on the microstructure and wear resistance of U75V rail welded joints in desert service environments

被引：0

作者：

Zhang, Xi ^{[1
,4
]}

Liao, Tingting ^{[2
]}

Liu, Xing ^{[2
,3
]}

Shen, Xiaoya ^{[2
]}

Tian, Ruotong ^{[2
]}

Yang, Xinyi ^{[2
]}

Guo, Biao ^{[4
]}

Lv, Qibing ^{[1
]}

Gou, Guoqing ^{[1
]}

Huang, Xiao ^{[5
]}

机构：

[1] Southwest Jiaotong Univ, Sch Mat Sci & Engn, Chengdu 610031, Sichuan, Peoples R China

[2] Chengdu Technol Univ, Sch Mat & Environm Engn, 1 Section 2,Citic Ave, Chengdu 611730, Sichuan, Peoples R China

[3] Sichuan Jiaotong Inspect & Testing Co Ltd, Chengdu 611743, Sichuan, Peoples R China

[4] Xihua Univ, Sch Mat Sci & Engn, Key Lab Mat & Surface Technol, Minist Educ, Chengdu 610039, Sichuan, Peoples R China

[5] China Railway Chengdu Bur Grp Co Ltd, Chengdu 610082, Sichuan, Peoples R China

来源：

JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T | 2025年 / 35卷

关键词：

U75V rail; Welded joint; High-temperature friction; Normalising; HIGH-TEMPERATURE; BEHAVIOR;

D O I：

10.1016/j.jmrt.2025.01.128

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

To elucidate the wear mechanism of rail steel welded joints in desert environments, we investigated the high- temperature friction and wear performance of U75V flash-butt welded rails across weld joints (normalised and non-normalised) as well as the base material at temperatures of 60, 200, and 300 degrees C. Owing to debris accumulation and the oxidised lubricating layer produced by the frictional process, all specimens exhibited elevated wear volumes accompanied by reduced friction coefficients with increasing temperature. The wear mechanism transitioned from adhesive wear to intense adhesive wear and ultimately delamination wear. Notably, owing to an optimised grain structure, the normalised joint demonstrated superior resistance against wear compared to its non-normalised counterpart under high-temperature conditions. These findings are anticipated to enhance rail quality within desert environments.

引用

页码：2337 / 2345

页数：9