Physicochemical analysis and the phenomenological model of secondary crystallization of a metal in the course of welding

Abstract

The processes occurring in the course of secondary crystallization of a multicomponent weld metal with an unrestricted alloying range are considered. A physicochemical analysis of these processes is performed. The results obtained are used to develop a phenomenological model of nonequilibrium secondary crystallization of a weld deposit. This model can be used to predict not only the chemical composition of the weld deposit matrix but also the quantitative and qualitative compositions of strengthening carbide phases formed during decomposition of austenite.