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18 nm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.
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