胀断连杆用C70S6钢的高周疲劳性能  

High-Cycle Fatigue Properties of C70S6 Steel for Connecting Rod of Fracture Splitting

作　　者：刘智雄[1,2] 陈思联[2] 张英建[2] 惠卫军[1,2] 刘荣佩[1] 

机构地区：[1]昆明理工大学材料科学与工程学院,昆明650093 [2]钢铁研究总院先进钢铁材料技术国家工程研究中心,北京100081

出　　处：《特殊钢》2010年第3期68-70,共3页Special Steel

基　　金：国家科技支撑计划基金项目资助(2007BAE51B03)

摘　　要：采用旋转弯曲疲劳实验研究了胀断连杆用两种成分(%:0.69C-0.034V-<0.005Ti-0.015N和0.72C-0.036V-0.023Ti-0.014N)C70S6钢的高周疲劳性能。结果表明,疲劳断裂均起源于试样的表面基体,其高周疲劳性能主要受微观组织特别是珠光体片层间距的影响;含0.023%Ti的C70S6钢中珠光体片层间距较大,析出粗大(Ti,V)(C,N),导致0.023%Ti钢疲劳性能低于不含Ti的C70S6钢。High-cycle fatigue properties of two C70S6 steels without and with Ti in steel （ % ： 0. 69C-0. 034V- 〈 0. 005Ti-0. 015N and 0. 72C-0. 036V-0. 023Ti-0. 014N） for connecting rod of fracture splitting have been studied by using rotating-hending fatigue test method. Results show that all fatigue cracks initiated at matrix of surface of specimen, and the high-cycle fatigue properties are affected by micro-structure especially by interlamellar spacing of peariite ; the interlamellar spacing of pearlite in the steel C70S6 containing 0. 023% Ti is larger than that in the Ti-free steel C70S6 in which there is coarse （Ti, V） （C, N） precipitates, therefore the fatigue properties of 0. 023 % Ti steel are lower that that of Ti-free steel.

关 键 词：C70S6钢 高周疲劳性能 微观组织 胀断连杆 

分 类 号：TG142.14[一般工业技术—材料科学与工程]