Abstract

Melting and crystallization of heterophase non-metallic inclusions “phases are beside” was investigated. It was shown that under laser action the initial structure of inclusion-steel matrix boundaries transits into unstable equilibrium high-energy condition that cause development of the dissipation processes connecting with aspiration of system inclusion-matrix to the state with minimum of the free energy. In the result of the system heterophase inclusion-matrix transits to the state of unstable equilibrium which determines structure and properties of laser-quenched interphase boundary. Processes of melting, fusion and dissolution of non-metallic inclusions “phases are beside” and also of the melting of steel matrix play the great role in transformation of interphase inclusion-matrix boundaries under laser action.