Abstract—

Mechanical properties of alloyed steels parts may be improved by precipitation of simple and/or complex chemical combinations (carbides, nitrides, and/or carbonitrides) using thermal and/or thermo-chemical treatments. Nevertheless, the precipitation of transition metal sulphides (TMSs) is considered as an undesirable phenomenon because of the negative influence on the material properties. This phenomenon has been the object of several theoretical studies (phenomenological description, thermodynamical and/or kinetical approaches) and is still under focus. In this study, the theoretical approach to this phenomenon is carried out on the basis of the non-dimensional mathematical analysis (collection and mathematical modelling of specific data bank). We propose a relative ranking of sulphidising ability for transition metals (TMs) and models to compute any TMS amount and relative content in the metallic structure of Fe-C alloys.

中文翻译：

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合金钢中过渡金属硫化物沉淀的理论考虑

摘要-

合金钢零件的机械性能可以通过使用热处理和/或热化学处理沉淀简单和/或复杂的化学组合（碳化物，氮化物和/或碳氮化物）来改善。然而，由于对材料性能的负面影响，过渡金属硫化物（TMSs）的沉淀被认为是不希望的现象。这种现象一直是一些理论研究（现象学描述，热力学和/或动力学方法）的目标，并且仍是关注的焦点。在这项研究中，针对这种现象的理论方法是在无量纲数学分析（特定数据库的收集和数学建模）的基础上进行的。