Surface hardening of hot work tool steel using a high power diode laser

Abstract

This paper presents the results of laser remelting influence on structure and properties of the surface of the 32CrMoV12-28 hot work steel, carried out using the high power diode laser (HPDL). Niobium carbide powder was used for alloying. It was discussed: selection of laser parameters - particularly laser power, speed of alloying, gas protection on the quality of surface layer. The research was carried out : light microscope, scanning microscope with EDS, hardness, microhardness and X-ray microanalysis results.