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利用透射电子显微技术研究了W6Mo5Cr4V2钢在750～1150℃温度范围内等温形变0～65％后直接淬火或270℃等温淬火的显微组织。结果表明:形变诱发了MC型碳化物,且析出碳化物的分布和形态与形变参数有关;MC与母相奥氏体的取向关系为三基矢分别平行,且MC的析出不影响随后相变产物的形貌;马氏体和贝氏体铁素体的惯习面为{111},它们与奥氏体、MC间有这样的关系:(111)_(MC)∥(111)_γ,∥(O11)_α;[110]_(MC)∥[110]_γ∥[111]_α。此外,还有另外一种取向关系,此时(200)_(MC)与(111)_α。晶面共格。
The microstructure of W6Mo5Cr4V2 steel after direct isothermal quenching or isothermal quenching at 270 ℃ was investigated by transmission electron microscopy after isothermal deformation of steel W6Mo5Cr4V2 in the temperature range of 750 ~ 1150 ℃ was 0 ~ 65%. The results show that the MC-type carbides are induced by deformation and the distribution and morphology of precipitated carbides are related to the deformation parameters. The orientation relationship between MC and parent austenite is parallel to each other and the precipitation of MC does not affect the subsequent phase transformation The morphology of the product; martensite and bainitic ferrite habitus {111}, with austenite, MC have such a relationship between: (111) _ (MC) ∥ (111) _γ, ∥ (O11) _α; [110] _ (MC) ∥ [110] _γ∥ [111] _α. In addition, there is another kind of orientation relationship, this time (200) _ (MC) and (111) _α. Crystal surface coherent.