INFLUENCE OF TECHNOLOGICAL PARAMETERS OF LASER SINTERING ON THE FORMATION MECHANISM AND PROPERTIES OF SUPER HARD ABRASIVE COMPOSITES
DOI:
https://doi.org/10.20535/2305-9001.2013.69.29015Keywords:
laser sintering, super-hard materials, composites for tool manufacturingAbstract
Research on optimal technological parameters for sintering of tool composites of intractable materials employing laser systems with lowest power density and highest laser beam travel speeds is presented in this paper. Energy parameters and conditions of laser irradiation of tool composites that reduce negative thermal influence on grains of cubic boron nitride were established. Influence of laser processing parameters on the shape and hardness of abrasive layers is shown. Highly dispersed structure with 6000 – 10000 MPa hardness is observed after laser processing of Iron an Nickel based composites. Hardness of sintered composites increases with the level of dispersion of its components, hardness of composite matrix and increase of hard eutectic ratio.
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