吴毅,尹鸿祥,孟扬,李天宇,赵子华

• 1:中国铁道科学研究院集团有限公司金属及化学研究所
• 2:北京航空航天大学能源与动力学院
• 3:北京航空航天大学材料科学与工程学院

摘要(Abstract)：

现行高铁车轴的设计标准是基于高周疲劳"安全寿命"设计方法,但并未考虑低温服役环境下车轴材料的高周疲劳行为。本文采用低温旋转弯曲疲劳试验机,测试了进口EA4T车轴钢的室温和低温高周疲劳性能以及国产DZ2车轴钢的低温高周疲劳性能,绘制了其疲劳S-N曲线和P-S-N曲线。结果表明:EA4T车轴钢低温高周疲劳性能优于室温高周疲劳性能,DZ2车轴钢与进口EA4T车轴钢的低温高周疲劳性能相近;疲劳裂纹均起源于表面,裂纹穿晶扩展。

关键词(KeyWords)： 高铁车轴;EA4T车轴钢;DZ2车轴钢;高周疲劳;低温

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划(2017YFB0304600);; 中国铁道科学研究院院基金(2017YJ089);; 中国铁路总公司科技研究开发计划课题(J2017J002)

作者(Author): 吴毅,尹鸿祥,孟扬,李天宇,赵子华

DOI: 10.13289/j.issn.1009-6264.2018-0500

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