Study of crystallization processes and structure formation of graphitized steels

Purpose. To study the influence of carbon and silicon, modifier composition and cooling rate, heat treatment on the processes of crystallization and structure formation in graphitized steels.

Application area. Enterprises of ferrous and non-ferrous metallurgy.

Advantages. Corresponds to the level of world analogues.

Technical and economic effect. Obtaining inclusions of free graphite in cast graphitized steels can significantly reduce the duration of graphitizing annealing or avoid it, which can significantly reduce the cost of their production by up to 70%.

Description. The influence of carbon and silicon, the composition of the modifier and the cooling rate, heat treatment on the processes of crystallization and structure formation in graphitized steels (the structure of the metal base, the number and shape of graphite inclusions), the duration of graphitizing annealing, mechanical (σв, σ0.2, δ and service ( heat resistance N) properties of graphitized steel The dependences of the influence of the chemical composition, cooling rate, modifier composition and heat treatment on the processes of structure formation and properties of graphitized steels were obtained. Compact inclusions of graphite in the free state in cast graphitized steels were obtained. Graphic dependences of the phase content of pearlite and graphite in the structure were constructed. on the thickness of the casting wall and the chemical composition of graphitized steels, which make it possible to predict the structure and properties of modified graphitized steels during their production.

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