摘要
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
The relationships of contact fatigue life and productive processes and stress level of PD3 rail steel are systematically investigated both experimentally and theoretically. The test results show that, with the technical improvement from hot rolling to off--line full length heat treatment to on--line full length heat treatment, the contact fatigue life increases one by one sequentially. A negative exponential relationship exists between the contact fatigue life and the maximum Hertzain stress. With the increment of relative contact stress, the deformation mechanisms are respectively elastic shakedown, plastic shakedown and ratcheting effect.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2000年第11期1157-1160,共4页
Acta Metallurgica Sinica
关键词
接触疲劳寿命
钢轨钢
生产工艺
最大接触应力
contact fatigue life, rail steel, productive process, maximum Hertzain stress
