Analysis of Micro Damage Factors of Shattered Rim and Tread Shelling of Railway Wheel

被引：3

作者：

Cong, Tao ^{[1
,2
]}

Han, Jianmin ^{[1
]}

Zhang, Guanzhen ^{[2
]}

Wu, Si ^{[2
]}

Zhang, Pengpai ^{[2
]}

机构：

[1] School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing,100044, China

[2] Metals and Chemistry Research Institute, China Academy of Railway Sciences, Beijing,100081, China

来源：

Zhongguo Tiedao Kexue/China Railway Science | 2017年 / 38卷 / 05期

关键词：

Fatigue crack propagation - Plastic deformation - Slags - Vehicle wheels - Railroad transportation - Fatigue damage - Metals;

D O I：

10.3969/j.issn.1001-4632.2017.05.13

中图分类号：

学科分类号：

摘要：

There are three different sets, and twenty standard wheels which are with shattered rim and with tread shelling and noncondemnable damage wheel of average kilometrage of 300 000 in revenue service designated as a set of the same types of cars. They have been selected to systematically investigate the component and quantitative relationship of different types of non-metallic inclusions using ASPEX automatic scanning electron microscope system, which can scan a large range of metallographic specimen. The morphology and characteristics of shattered rim and tread shelling wheels have been observed and measured by scanning electron microscope and optical microscope to study the mechanism of shattered rim and tread shelling. Results indicate that an absolute majority of the non-metallic inclusions from wheels with shattered rim are brittle inclusions which are accounted for 85% of the total inclusions, and the visible millimeter brittle oxide inclusions which belong to refractory materials or slag in smelting or pouring process existing in the crack initiation zone are the main reason to shattered rim. Moreover, the non-metallic inclusions are almost plastic inclusions which are accounted for 84% and 93% of the total inclusions respectively distinguished from tread shelling wheels and noncondemnable damage wheels. The failure reason of tread shelling wheels is a significant amount of plastic deformation layer thickness of which the average is about 1 mm and is approximately ten times than that of noncondemnable damage wheels. © 2017, Editorial Department of China Railway Science. All right reserved.

引用

页码：93 / 99