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本文首先论述了渗硼组织共晶化的金属学基础,并通过实验验证了共晶化的发生过程,即共晶化是由Fe_2B或Fe_3(CB)与γ-Fe相界处开始,受硼扩数控制的液化过程。最终的共晶组织形态和性能除与成分有关外,还与液化后的冷却速度有关。冷速愈快,组织愈细,硬度愈高,而且韧性也愈好。因此渗硼组织共品化很有希望成为一种新的表面强化法。
In this paper, the basic metallurgy of eutecticization of boronizing structure is discussed firstly, and the eutecticization process is verified by experiments. That is, eutecticization starts from the boundary between Fe_2B or Fe_3 (CB) and γ-Fe, Expansion control of the liquefaction process. The final eutectic morphology and properties are related, in addition to the composition, to the cooling rate after liquefaction. The faster the cooling rate, the finer the structure, the higher the hardness, and the better the toughness. Therefore, boronization of the total organization of the material is promising to become a new surface strengthening method.