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钢中第二相的合理控制对于提高钢铁材料的综合性能具有重要意义,而第二相控制的关键在于准确掌握第二相在铁基体中的固溶与析出行为。多元第二相平衡固溶的定量计算是第二相固溶与析出行为研究中的一个难点问题。以铌、钒、钛的微合金碳氮化物为例讨论了钢中三元第二相平衡固溶的热力学模型与计算方法及其在含钛渗碳齿轮钢产品开发中的应用。由于该方法求解计算量较大,在其基础上开发了一套可以自动计算和对比分析其中各个控制参量的通用分析计算软件,该软件可以有效应用于微合金钢的成分设计、生产工艺控制和钢种开发等,具有重要的工程应用价值。
The reasonable control of the second phase in steel is of great significance to improve the overall performance of the steel material. The key of the second phase control lies in the accurate understanding of the solution and precipitation behavior of the second phase in the iron matrix. The quantitative calculation of the equilibria solid solution of the second phase is a difficult problem in the study of solid solution and precipitation behavior of the second phase. Taking niobium, vanadium and titanium microalloyed carbonitride as an example, the thermodynamic model and calculation method of the ternary second phase equilibrium solid solution in steel and its application in the product development of titanium-containing carburized gear steel were discussed. Because of the large computational complexity of the method, a set of general analysis and calculation software that can automatically calculate and compare each of the control parameters is developed. The software can be effectively applied to the composition design of microalloyed steel, the production process control and Steel development, etc., has important engineering application value.