摘要
制备了3种不同氢含量的高强弹簧钢50CrV4样品(淬火、回火样品,0.6×10^(-6);真空退火样品,0.2×10^(-6);高温高压热充氢样品,2.5×10^(-6)).SEM观察表明,疲劳断口内部起裂源为小夹杂团簇;疲劳强度测试表明,随氢含量(c)的增加,疲劳强度基本上按σ_0-αexp(c)规律降低,Basquin方程中的Basquin指数随氢含量的增加有明显变化.
Three groups of specimens with different hydrogen contents （c） were obtained from three different heat treatment procedures： quenched and tempered （specimen QT, 0.6×10^-6）, annealed at 380 ℃ in a vacuum after QT （specimen VA, 0.2×10^-6） and treated by high-pressure thermal hydrogen charging （HPTHC） after QT （specimen HPTHC, 2.5×10^-6）. SEM observation showed that the crack initiation sites are all at internal inclusion clusters under high cycle fatigue. The fatigue strength （σw） decreased according to α0 - α exp（c） law with the increase of c. Basquin exponent in Basquin equation changed distinctly with the increase of c.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2008年第1期64-68,共5页
Acta Metallurgica Sinica
基金
国家重点基础研究发展计划资助项目G2004CB619100~~
关键词
弹簧钢
氢
超高周疲劳
夹杂团簇
Basquin方程
spring steel, hydrogen, ultrahigh cycle fatigue, inclusion cluster, Basquin equation spring steel, hydrogen, ultrahigh cycle fatigue, inclusion cluster, Basquin equation
