基于8.8级螺栓疲劳性能的预紧力优化

宋竹满,李瑞,钱苗,史文博,钱科,马恒,陈庆吟,张广平

Optimizing Prestress of Fatigue Property-dominated 8.8-grade Bolts

Zhuman SONG,Rui LI,Miao QIAN,Wenbo SHI,Ke QIAN,Heng MA,Qingyin CHEN,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， %)

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