摘要
研究了采用真空感应+真空自耗重熔工艺冶炼的高纯净二次硬化超高强度AF1410钢的高周疲劳和疲劳裂纹扩展性能。结果表明:高纯净度AF1410钢具有优异的强韧性配合和较高的抗疲劳裂纹扩展能力,应力比R为0.1时,其光滑(Kt=1)和缺口(Kt=3)疲劳强度分别为1 375 MPa和417 MPa,且疲劳裂纹源均起始于试样表面缺陷;回火温度对该钢的疲劳裂纹门槛值影响显著。
High-cycle fatigue properties and fatigue crack growth behavior of high clean secondary hardening ultra-high strength steel（AF1410）,which was made by vacuum induction melting followed by vacuum arc remelting（VIM-VAR）,have been studied.The experimental results indicate that high clean AF1410 steel has excellent combination of strength and toughness and high resistance on fatigue crack growth.Fatigue strength of smooth specimen（R=0.1,Kt=1） and notch specimen（R=0.1,Kt=3） reaches 1 375 MPa and 417 MPa.Fatigue cracks all initiates from specimen surface.Tempering temperature remarkably affects the threshold value of fatigue crack propagation.
出处
《钢铁》
CAS
CSCD
北大核心
2011年第2期69-73,共5页
Iron and Steel
