Modelling of Distribution of Ultradisperse Particles of Titanium, Tungsten and Zirconium Carbide During Centrifugal Casting

Abstract

Traditionally, an increase in the mechanical properties of used steels and alloys in ferrous metallurgy is achieved by introducing a significant amount of alloying elements into the metal or alloy. Analysis of the cost market for alloying elements has shown that prices for ferroalloys are increasing every year. An alternative to using expensive alloying elements can be heterophase dispersed-reinforced steels with an unexpressed layer interface. The principal method of creating bulk-gradient metallic materials is dispersion hardening. And one of the effective methods of dispersed hardening is the introduction of particles during centrifugal casting. Although this technology is already known, it has not been studied much, both theoretically and experimentally. This work, which was carried out for grant AP23485709, funded by the Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan, is devoted to constructing a computer model of the crystallization process of 12X18H10T steel during centrifugal casting with the introduction of reinforcing particles of titanium, tungsten, and zirconium carbides into it and studying the dynamics of the distribution of dispersed particles under the influence of a gravitational field after the solidification process metal. In the course of this work, a computer model of the distribution of dispersed particles over the cross-section of cylindrical castings obtained by centrifugal casting was developed in order to obtain heterophase steels with a gradient of properties. This model makes it possible to predict the distribution of up to 40 billion particles simultaneously at each moment of casting on a horizontal casting machine. The results of the work indicate that the proposed technology of centrifugal casting with the introduction of dispersed particles during casting makes it possible to obtain research and experimental samples of heterophase steels with a gradient of properties.