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

刘智雄; 陈思联; 张英建; 惠卫军; 刘荣佩

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

更新时间：2026-01-21

- High-Cycle Fatigue Properties of C70S6 Steel for Connecting Rod of Fracture Splitting
- Special Steel Vol. 31, Issue 3, Pages: 68-70(2010)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：09 December 2009，
  
  Online First：07 November 2022，
  
  Published：07 November 2010
- 稿件说明：
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刘智雄, 陈思联, 张英建, et al. High-Cycle Fatigue Properties of C70S6 Steel for Connecting Rod of Fracture Splitting[J]. Special Steel, 2010, 31(3): 68-70.
DOI：

刘智雄, 陈思联, 张英建, et al. High-Cycle Fatigue Properties of C70S6 Steel for Connecting Rod of Fracture Splitting[J]. Special Steel, 2010, 31(3): 68-70. DOI：

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

导致0.023%Ti钢疲劳性能低于不含Ti的C70S6钢。

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.

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