The article discusses the issues of conducting and researching thermodynamic calculations using the complex program "Triangle" for triple systems Al-Cr-Si and Al-Cr-C. Based on the results obtained, the main phases arising in iron-titanium alloys and their changes depending on temperature were studied. In addition, the possibility of creating a real material balance of melting and thermodynamic regulation of the alloy composition was considered. The use of thermodynamic modeling in predicting metallurgical processes occurring in high-temperature regions in the
Al-C-Si and Al-C-Cr systems makes it possible to establish the mechanism of the main chemical reactions and determine the exact stoichiometric ratio of reactions and show the correct recording of the reaction based on compliance with the conditions of phase equilibrium in the system. The results obtained regulate the basis for compiling the actual material balance of the melting of iron-chromium alloys and the composition of the alloy. The components of the fourcomponent chromium-based Al-Cr-Si-C system make it possible to study triangles that clearly characterize the metallurgical processes occurring in high-temperature regions in the Al-C-Si and Al-C-Cr systems, to determine the composition of the alloy. The phases occurring in the studied temperature ranges are the actual components of the smelted product. Research and modeling of four-component systems will be the main prerequisite for solving production problems.

1. Габдуллин Т.Г., Такенов Т.Д., Байсанов С.О., Букетов Е.А. Физико-химические свойства марганцевых шлаков. - Алматы: Наука, 1984. - 232с.
2. Акбердин А.А. Балансовый метод расчета равновесного фазового состава многокомпонентных систем //КИМС. - 1995. - №3. - С. 92-93.
3. Акбердин А.А., Сарекенов К.З., Саитов Р.И. Аналитическое описание фазового равновесия в системе CaO-SiO2-FeO-ZnO //Вестник Карагандинского университета. - Караганда. - 2005. - №1(37). - С. 14-18.
4. Симбинов Р.Д., Малышев В.П. Термодинамическое, стехиометрическое и эксергетическое моделирование фазовых равновесий. - Алматы: Гылым, 1999. - 100с.