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

Special Steel ›› 2010, Vol. 31 ›› Issue (3): 68-70.

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

Liu Zhixiong^1，2, Chen Silian², Zhang Yingjian², Hui Weijun^1，2 ， Liu Rongpei¹

1 Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093 ；
2 National Engineering Research Center of Advanced Iron and Steel Technology, Central Iron and Steel Research Institute, Beijing 100081

Received:2009-12-09 Online:2010-06-01 Published:2022-11-07

胀断连杆用C70S6钢的高周疲劳性能

刘智雄^1,2，陈思联²，张英建²，惠卫军^1,2，刘荣佩¹

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

通讯作者: 惠卫军
作者简介:刘智雄( 1982-),男，在读硕士研究生。
基金资助:
国家科技支撑计划基金项目资助(2007BAE51B03)

Abstract

Abstract: 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-bending 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 pearlite ； the interlainellar 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.

Key words: C70S6 Steel, High-Cycle Fatigue Property, Microstructure, Connecting Rod of Fracture Splitting

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。

关键词: C70S6钢, 高周疲劳性能, 微观组织, 胀断连杆

Liu Zhixiong, Chen Silian, Zhang Yingjian, Hui Weijun, Liu Rongpei. High-Cycle Fatigue Properties of C70S6 Steel for Connecting Rod of Fracture Splitting[J]. Special Steel, 2010, 31(3): 68-70.

刘智雄, 陈思联, 张英建, 惠卫军, 刘荣佩. 胀断连杆用C70S6钢的高周疲劳性能[J]. 特殊钢, 2010, 31(3): 68-70.