微动对车轴钢疲劳性能的影响  

Influence of fretting on the fatigue behavior of axle steel

作　　者：杨广雪[1] 李强[1] 谢基龙[1] 李秋泽[1] 

机构地区：[1]北京交通大学轨道车辆结构可靠性与运用检测技术教育部工程研究中心,北京100044

出　　处：《北京交通大学学报》2012年第1期127-131,共5页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：国家"863"计划项目资助(0912JJ0104-DL00-H-H-HZ-001-20100105);国家科技支撑计划项目资助(2009BAG12A07);中央高校基本科研业务费资金资助(2011JBM287)

摘　　要：针对铁道轮轴间微动损伤的特点,设计了能够模拟过盈连接在旋转弯曲载荷下微动损伤问题的试样轴和试样套管.在实物车轴的特定位置切割试样,加工制作了常规疲劳试样和微动疲劳试样,并采用温差法组装微动疲劳试样的轴和套管,然后借助四点旋转弯曲疲劳试验机,通过单点法试验得出了该车轴钢的常规疲劳寿命(S-N)曲线和微动疲劳寿命曲线.结果表明,微动显著降低了车轴钢的疲劳极限,并且微动疲劳试样均在轴套配合的边缘断裂.Considering the characteristics of the fretting damage between railway axle and wheel, the specimen of axle and hub was designed to simulate the problem of fretting damage of interference fit under rotating bending load. The blanks were cut from the special zone of the real axle, and then machined into normal fatigue specimens and fretting fatigue specimens. The fretting fatigue specimens of axle and hub were assembled by temperature different method. Then the fatigue life of the axle steel with and without fretting was obtained with the help of four point rotating bending fatigue testing machine. The result shows that the effect of fretting on the fatigue life of axle steel is remarkable, and the fracture surfaces of fretting fatigue specimens are all near the contaet edge of axle and hub.

关 键 词：车轴钢 疲劳 微动 试验 

分 类 号：TG405[金属学及工艺—焊接]