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EA4T车轴钢的高周和超高周疲劳性能研究

陈一萍,李亚波,张晓乐,孙成奇,洪友士

Rail Transportation Equipment and Technology（2017）

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Abstract
研究了2组EA4T车轴钢的高周和超高周疲劳性能,一组是现车用的欧系EA4T车轴试样,一组是试验用车轴钢25CrMo4试样.采用旋转弯曲疲劳试验机进行疲劳试验,结果表明,当应力水平较低时,2批试样均未发生108周次的疲劳断裂.疲劳断口的扫描电子显微镜观测显示,裂纹均从试样表面起源.S-N试验数据结果比较表明,试验用的车轴钢25CrMo4具有更好的疲劳性能.
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