Sliding wear and low cycle fatigue properties of new carbide free bainitic rail steel

被引：33
|
作者：
Feng, X. Y. [1 ]
Zhang, F. C. [1 ]
Kang, J. [1 ]
Yang, Z. N. [1 ]
Long, X. Y. [1 ]
机构：
[1] Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2014年 / 30卷 / 12期
基金：
美国国家科学基金会;
关键词：
Carbide free; Bainitic steel; Rail; Wear; Fatigue; MECHANICAL-PROPERTIES; LOW-CARBON; ROLLING/SLIDING WEAR; MICROSTRUCTURE; PERFORMANCE; BEHAVIOR;
D O I：
10.1179/1743284713Y.0000000474
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A new carbide free bainitic rail steel was prepared, whose comprehensive mechanical properties are equal or superior to current premium pearlitic and bainitic rail steels. The new bainitic rail steel possesses better low cycle fatigue properties and approximate resistance to wear compared with current pearlitic rail steel. The carbon enriched film-like austenite between the ferrite of the new bainitic rail steel can delay crack initiation and propagation in fatigue processes, resulting in a relatively high low cycle fatigue life (about two times) compared to the pearlitic rail steel. Finally, a wear model during sliding wear and deformation model during the low cycle fatigue of pearlitic and bainitic rail steels were established. As a result, the bainitic rail steel with a relatively reasonable combination of wear and fatigue properties compared to pearlitic rail steel is obtained, in which the initiation and propagation of cracks may be partially or entirely removed during the wear process.
引用
收藏
页码：1410 / 1418
页数：9
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