氢对42CrMoVNb钢超高周疲劳性能的影响  

Effect of Hydrogen on Fatigue Properties of High Strength Steel 42CrMoVNb

作　　者：周超[1,2] 张永健[1] 惠卫军[1] 王磊[2] 

机构地区：[1]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 [2]东北大学材料与冶金学院,辽宁沈阳110819

出　　处：《钢铁研究学报》2013年第12期52-57,共6页Journal of Iron and Steel Research

摘　　要：采用阴极充氢、氢热分析及超声波疲劳等试验方法,研究了高强钢42CrMoVNb在不同回火温度、不同氢水平下的超高周疲劳性能。结果表明:与500℃回火试样相比,600℃回火试样内新析出了大量尺寸在18nm以下且与基体保持共格关系的(V,X)C析出物,而利用(V,X)C等析出相的氢陷阱作用可影响试样内的氢分布及扩散行为,显著改善了氢对高强度钢超高周疲劳性能的不良影响。The influence of hydrogen on very high cycle fatigue properties of high strength steels 42CrMoVNb was investigated＇by means of pre-charging hydrogen, a thermal desorption spectrometry （TDS） analysis and ultra-son- ic fatigue test. The results show that in contrast with the tempered specimens of 500 ℃, a large amount of （V,X）C precipitates, which are less than 18nm and maintaining coherent relationship with matrix form in the tempered specimens of 600 ℃. The diffusion and distribution of hydrogen in specimens is affected by （V, X）C precipitates obviously, and the negative influence of hydrogen on very high cycle fatigue properties of high strength steels is re- duced by using the hydrogen trapping technology of （V,X）C precipitates.

关 键 词：氢 析出相 超高周疲劳 

分 类 号：TG142.4[一般工业技术—材料科学与工程]