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研究了高纯度Ｆｅ－０．０６％Ｃ－１．８０％Ｍｏ和Ｆｅ－０．１９％Ｃ－１．８１％Ｍｏ合金在５５０～８５０℃恒温时的贝氏体转变。结果表明，转变是完全的。两种合金分别在６００℃和５８５℃左右恒温时，转变中途出现暂时停滞的现象。而后恢复并加快转变。两合金等温等转（ＴＴＴ）图均有一明显稳定区（称为河湾或θｂ ），θｂ温度上下铁素体形貌明显不同。在７００～８００℃恒温时，碳化物平行于奥氏体晶粒边界沉淀。
The bainite transformation of high purity Fe-0.06% C-1.80% Mo and Fe-0.19% C-1.81% Mo alloy at a constant temperature of 550-850 ℃ was studied. The result shows that the transition is complete. When the two alloys were heated at about 600 ℃ and 585 ℃ respectively, the phenomenon of temporary stagnation appeared in the transition. Then resume and accelerate the change. The two isothermal isotherm (TTT) maps have a clear stable region (called the river bay or θb), the ferrite morphology significantly different θb temperature. At 700 ~ 800 ℃ constant temperature, the carbide precipitates parallel to the austenite grain boundaries.