Abstract：The high cycle fatigue fracture behavior of three heats commercial spring steels 60Si2CrVA were studied by using rotating bar twopoint bending fatigue machine in the highcycle regime up to 107 cycles. The experimental results indicated that there is significant difference in the fatigue properties of steels, with same oxygen content. Further investigation revealed that this difference is mainly caused by the difference in inclusion size. That means, both fatigue life and fatigue strength increase with decreasing inclusion size. For D60, in which the average inclusion size is 44.4 μm the SN curve displays a continuous decline without conventional limit and fatigue failures originated mainly from large oxide inclusions.For A60,which has the smallest inclusion size of about 15.4 μm, all the fatigue cracks except two did not initiate from inclusions but from specimen surface and there was conventional limit. In the case of internal inclusioninduced fracture at cycles beyond 1×106, inclusions were found inside the fisheye and granular bright facets (GBF) were observed in the vicinity of inclusions.
赵海民;惠卫军;聂义宏;董瀚;翁宇庆;. 夹杂物尺寸对60Si2CrVA高强度弹簧钢的 高周疲劳性能的影响[J]. 钢铁, 2008, 43(5): 66-0.
ZHAO Haimin;HUI Weijun;NIE Yihong;DONG Han;WENG Yuqing;. Effect of Inclusion Size on HighCycle Fatigue Behavior of High Strength Spring Steel. Iron and Steel, 2008, 43(5): 66-0.
2008, Vol. 43 
