Probable Ways of Hardening in the Metal Structure Obtained by Selective Laser Melting Technology

Abstract

Here is considered local melting events realizable under nonequlibrium thermodynamic conditions and phase-structural transformations of materials produced by additive technology using steel powders of different chemical composition. The mechanism of formation of nano- and micro-particlesis, which are crystallization nucleus and hardening units is illustrated here. The formation of such particles occurs due to condensation mechanism in the sequence: steam – cluster – quasinanoparticle. The quality of obtained material is defined by the degree and quality of this process.