摘要
通过室内试验研究了三种轨钢(不同金相组织的U71Mn轨样)的接触疲劳性能。试验表明,试样表层产生严重的塑性变形是形成接触疲劳破损的主要原因;通过热处理可提高轨钢的强度及硬度,接触疲劳强度也随之提高。作者分析了曲线地段的外轨内侧轨距角处(采用轮轨润滑方法)形成接触疲劳破损的原因,并根据室内试验结果提出在具有润滑条件的曲线上,钢轨以采用高强度淬火轨或合金轨为宜。
The contact fatigue property of three different structures of U71Mn rail specimen has been tested in laboratory, it pointed out that the contact fatigue damage is caused mainly by the severe plastic deformation of the specimen surface layer. Heat treatment can increase the tensile strength and the hardness of the rail steel, and the contact fatigue strength is also increased. The reason of the contact fatigue damage of the gage corner of lubricated high rait on the curve is also observed and researched in this paper. According to the results of this study, the high strength heat treated or alloyed rails should be used on lubricated curves.
出处
《铁道学报》
EI
CAS
CSCD
北大核心
1990年第2期81-87,共7页
Journal of the China Railway Society
