8.8级螺栓用ML40Cr钢的疲劳性能和裂纹扩展行为

王源晨,宋竹满,李瑞,史文博,朱艳坤,张广平

Fatigue Properties and Crack Growth Behavior of ML40Cr Steel for 8.8-grade Bolts

Yuanchen WANG,Zhuman SONG,Rui LI,Wenbo SHI,Yankun ZHU,Guangping ZHANG

表1 8.8级螺栓的化学成分

Table 1 Chemical composition of 8.8 grade bolt (mass fraction, %)

C Si Mn S P Cr Mo Cu Ni Fe 0.40 0.24 0.58 0.007 0.009 0.89 <0.03 0.03 <0.3 Bal.