ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2010, Vol. 31 ›› Issue (3): 68-70.

• 组织和性能 • 上一篇    

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. 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
  • 收稿日期:2009-12-09 出版日期:2010-06-01 发布日期:2022-11-07
  • 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)

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

Liu Zhixiong1,2, Chen Silian2, Zhang Yingjian2, Hui Weijun1,2 , Liu Rongpei1   

  1. 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 Published:2010-06-01 Online:2022-11-07

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

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