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本文对渗硼钢共晶化过程的相变机理及动力学进行了初步的探讨。结果表明：共晶化首先在 ｒＦｅ与Ｆｅ２Ｂ的界面上开始，然后液态共晶层向ｒＦｅ及Ｆｅｂ两侧扩展，直至Ｆｅ２Ｂ相全部溶解为止． 理论分析进一步表明：共晶化过程是受硼在液相中的扩散所控制的．因此，共晶化的时间除和硼 化物层厚度有关外还取决于过热度的大小；而最终所得共晶层的厚度，则和原始硼化物层厚度成 线性关系。
In this paper, the phase transition mechanism and kinetics of the infiltrated steel were discussed. The results show that the eutectic begins at the interface between rFe and Fe2B first, and then the liquid eutectic layer expands towards both rFe and Feb until the Fe2B phase is completely dissolved. Theoretical analysis further shows that the eutectic process is controlled by the diffusion of boron in the liquid phase. Therefore, the eutectic time depends not only on the thickness of the boride layer, but also on the degree of superheat. The thickness of the resulting eutectic layer is linearly proportional to the thickness of the original boride layer.