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对ＰＤ３钢轨钢的接触疲劳寿命与其生产工艺和应力水平之间的关系进行了系统的实验研究和理论分析．结果表明，随 着从热轧－离线感应全长热处理－在线余热全长热处理工艺改进过程的进行， ＰＤ３钢轨钢的接触疲劳寿命逐步提高； ＰＤ３钢 轨钢的接触疲劳寿命与最大接触应力间存在负的幂指数关系；随着相对接触应力的提高，变形机制分别为弹性安定、塑性安定和棘 轮效应
The relationship between the contact fatigue life of PD3 rail steel and its production technology and stress level was systematically studied and analyzed. The results show that the contact fatigue life of PD3 steel increases gradually with the improvement of the full-length heat treatment of hot rolling and off-line induction - the full heat treatment of in-line residual heat. The contact fatigue life and the maximum contact stress of PD3 steel have negative With the increase of relative contact stress, the deformation mechanisms are elastic stability, plastic stability and ratcheting effect