本文提出了一种新的钢轨疲劳寿命的可靠度估算方法，使可靠性分析第一次进入钢轨的寿命估算。
This paper proposes a new estimating method which, for the first time. introduces reliability analysis into the life estimation of railway rails.
计算发现，夹杂物周围的最大剪切应力是不含夹杂物时的1.2～1.7倍，这对钢轨疲劳寿命造成有害影响。
The calculation indicates that the maximum shear stress around inclusion is 1.2-1.7 times of that without inclusion, which has a harmful effect on the fatigue endurance of rail.
本文收集和总括了钢轨钢的疲劳试验数据。
In this paper the fatigue test data of rail steels are collected and summarized.
由于升降法提供了具有存活率指标的疲劳极限值，可以为评定钢轨的质量提供新的指标。
This approach offers the value of fatigue limit with survival rate index, hence it may be used as a new criterion to estimate the rail quality.
通过对钢轨的修磨可减少由于滚动接触疲劳引起的钢轨损伤，减少钢轨侧面磨损，可延长钢轨的使用寿命0.5 ~1倍。
It may decrease fatigue damage causing by rolling contact and side damage on track and prolong rail service life 0.5 ~ 1 time by means of grinding rail track.
结合实验探讨了冷扩张过程对钢轨螺栓孔疲劳寿命的影响方式和效果。
By comparing with the experimental results, a detailed discussion on the influence of cold expansion on the fatigue performance of rail bolt hole was presented.
钢轨打磨可以有效解决钢轨的疲劳伤损。
The rail grinding can solve the fatigue damage of the rail effectively.
结果表明，掉块缺陷的形成是由于钢轨滚动接触疲劳伤损所致。
The result shows that rolling contact fatigue failures caused swap block defects of rail.
又根据MAE强度随材料相对疲劳度的变化规律，探讨了用MAE法估测钢轨剩余寿命的可行性。
The possibility of predicting the rail′s remaining life by means of MAE technique is also discussed.
简要地介绍了国外近年来有关钢轨钢的交变形变，疲劳裂纹的萌生，扩展、阻滞等方面的研究试验。
The researches and tests recently performed abroad on cyclic deformation behaviors, crack initiation, crack propagation and crack retardation properties of rail steels are introduced briefly.
钢轨侧磨与压溃是重载曲线段钢轨的主要损伤类型，而高速铁路钢轨主要表现为疲劳损伤特征；
The results indicate that the wear of gauge-rail and the plastic flow are dominant for heavy-haul curve rail, and the fatigue behavior is primary for high-speed rail.
钢轨侧磨与压溃是重载曲线段钢轨的主要损伤类型，而高速铁路钢轨主要表现为疲劳损伤特征；
The results indicate that the wear of gauge-rail and the plastic flow are dominant for heavy-haul curve rail, and the fatigue behavior is primary for high-speed rail.
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