Product Code: ICAL05_P551

Diode Laser Surface Treatment of X40CrMoV5-1 Hot-Work Tool Steel
Authors:
Leszek Dobrzanski, Silesian University of Technology; Gliwice Poland
Miroslaw Bonek, Silesian University of Technology; Gliwice Poland
Presented at ICALEO 2005

Investigations include alloying the X40CrMoV5-1 hot-work tool steel surface layer with the tungsten carbide, using the high power diode laser (HPDL). The structural mechanism was determined of surface layers development, effect was studied of alloying parameters, gas protection method, and thickness of paste layer applied onto the steel surface on structure refinement and influence of these factors on the mechanical properties of surface layer, and especially on its hardness, abrasive wear resistance, and roughness. The fine grained martensite structure is responsible for hardness increase of the alloyed layer. The dependence is presented of micro-hardness change on the laser beam effect on the treated surface, and especially the hardness increase in the alloyed layer. The tribological wear relationships were determined for laser treated surface layers, determining friction coefficient, mass loss, and wear trace shape developed due to the abrasive wear of the investigated surfaces. The X40CrMoV5-1 conventionally heat treated steel was used as reference material. The outcome of the research is an investigation and proving the structural mechanisms accompanying laser remelting and alloying. It has the important cognitive significance and gives grounds to the practical employment of these technologies for forming the surfaces of new tools and regeneration of the used ones.