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本工作用示差热分析法,淬火样品X射线衍射法和Guinier-Lenn透射式高温单色聚焦粉末照相法研究了Fe-C-Sb合金中液态急冷获得的ε相的高温分解过程,实验结果指出,ε相在125℃开始分解,首先分解成ε-Fe_2C,而后在450℃分解成α-Fe,并析出Sb和Fe_3Sb_2,还保留有ε-Fe_2C;在550℃以后ε-Fe_2C转变成Fe_3C,并在770℃时发生Fe的α→γ转变,在800℃时主要组成相为:γFe,Sb,Fe_3C(Fe_3Sb分解);在冷却过程中750℃发生Fe的γ→α转变,冷至室温时的主要组成相是:αFe,Fe_3C,Sb,Fe_3Sb_2。
In this work, the pyrolysis process of ε phase obtained from liquid quenching in Fe-C-Sb alloy was studied by differential thermal analysis, quenched sample X-ray diffraction and Guinier-Lenn transmission high temperature monochromatic focused powder photography. The experimental results indicate , the ε phase starts to decompose at 125 ℃ and decomposes into ε-Fe_2C first, and then decomposes to α-Fe at 450 ℃, and Sb and Fe_3Sb_2 are also precipitated, while ε_Fe_2C remains. After ε_Fe_2C is transformed into Fe_3C at 550 ℃, And the α → γ transition of Fe occurs at 770 ℃. The main phase of the composition is γFe, Sb and Fe_3C (Fe_3Sb decomposition) at 800 ℃. The γ → α transition of Fe occurs at 750 ℃ during cooling. When cooling to room temperature The main components are: αFe, Fe_3C, Sb, Fe_3Sb_2.