PD3钢轨钢接触疲劳行为研究

INVESTIGATION OF CONTACT FATIGUEBEHAVIORS OF PD3 RAIL STEEL

在最大接触应力为１３４１ＭＰａ、滑差率为１０％及油润滑的试验条件下，对在线全长余热淬火、热轧及稀土处理三种状态的ＰＤ３钢轨钢的接触疲劳行为进行了测定。通过对失效试样的分析，对钢轨钢的接触疲劳机制进行了探讨。试验结果表明，在线全长余热淬火工艺大大提高了ＰＤ３钢轨钢的接触疲劳抗力。

In this paper,the contact fatigue behaviors have been measured respectively for online and fulllength quenched after rolling directly,hot rolled and the RE alloyed PD3 rail steels under the conditions of maximum contact stress 1[KG8〗341 MPa,10 % creepage and oil lubricationThe mechanism of contact fatigue for rail steel has also been investigated by analysis of failed specimenThe test results show that the contact fatigue resistance of PD3 rail steel is increased greatly by online and fulllength quenching after rolling directly