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本文用石英弹簧热重分析法测定了Ｆｅ２０Ｍｏ合金在不同温度的１ｋＰａ硫蒸汽中的硫化动力学曲线，计算了硫化速度常数，用扫描电镜观察分析了硫化产物层的结构。结果表明，加入Ｍｏ使合金的硫化速度比纯铁的降低了一个数量级，合金硫化遵从初期线性加后期抛物线的规律。温度升高使硫化加快且ＦｅＳ晶体生长趋于完善。硫化产物主要分两层，外层为ＦｅＳ，内层为富Ｍｏ的复杂硫化物且包含未完全硫化的ＦｅＭｏ金属间化合物相。应用热力学理论和以上结果探讨了合金的硫化机理
In this paper, the kinetics of sulfidation kinetics of Fe20Mo alloy in 1kPa sulfur vapor at different temperatures was measured by Quartz spring thermo-gravimetric analysis. The vulcanization rate constants were calculated and the structure of vulcanized product layer was analyzed by scanning electron microscopy. The results show that adding Mo makes the cure rate of the alloy lower than that of the pure iron by one order of magnitude, and the alloy vulcanization follows the law of initial linear plus parabola. Increasing temperature accelerates vulcanization and the crystal growth of FeS tends to be perfect. The vulcanization product is mainly divided into two layers, the outer layer is FeS, the inner layer is a complex Mo-rich sulfide and the incompletely-sulfurized FeMo intermetallic compound phase. The thermodynamic theory and the above results are used to investigate the vulcanization mechanism of the alloy