关键词：钢铁；疲劳可靠性；疲劳测验；火车车轮；概率
摘 要：To obtain fatigue design data of the train wheel steel,the fatigue tests were carried out for the steel of K type and B type train wheel separately,which fatigue limit was measured using the fluctuation method,the fatigue life of two kinds of wheel steels were tested using the grouping method at the three stress levels,two different materials and different structures have an influence on the fatigue properties of the wheels using reliability principle.The fatigue life distribution of the B type is scattered relatively.S-N curve equation and P-S-N curve equation of the two kinds of steel were calculated.The theoretical basis were put up for developing design standards and safety evaluation of the both wheel.