To the question of increasing the heat resistance of materials

Laboratory researches the influence of cooling rate of cast iron-aluminum alloys containing 25-33% Аl, on matrix structure, quantity and structure of nonmetallic inclusions are carried out. Thermodynamic modeling of structure and quantity of phases which were formed in alloy system containing Fe-Al-Si-C-O, for equilibrium conditions by means of the program complex ASTRA-4 (TERRA) is carried out. It is confirmed that ferroalloy with the optimal structure necessary for receiving the cast iron, possessing high heat resistance, should be cooled after smelting with the highest speed in these conditions. It is established that irrespective of cooling rate the matrix has structure of intermetallic FeAl, and nonmetallic inclusions have platelet shape and represent the composite oxicarbides of iron and aluminum.