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采用Ｘ衍射和透射电镜研究了淬火及深冷后的微细组织结构，指出深冷处理后硬度的提高主要来自微细弥散碳化物的沉淀析出，这些碳化物直径在１０－ ６ ｍ ｍ级．研究表明，深冷处理使马氏体轴比ｃ／ａ 降低．
The microstructures after quenching and cryogenic treatment were studied by X-ray diffraction and transmission electron microscopy. It is pointed out that the increase of hardness after cryogenic treatment mainly comes from the precipitation of finely divided precipitated carbides with a diameter of 10-6 m. Research shows that cryogenic treatment reduces the martensite axial ratio c / a.