Patent ID: 8119950
Filing Date: 2012-02-21
Classification: B23K,C23C,F04D,F05D,Y10T

Abstract:
1. An apparatus for hard faced surface coating of diamond particles in a metal matrix on a ferrous metal substrate containing carbon, which comprises: (a) a first support means for holding the ferrous metal substrate; (b) a device mounted on a second support means for delivering a laser beam on one axis towards the ferrous metal substrate to provide a heating zone on the ferrous metal substrate; and (c) a supply means nozzle which is mounted adjacent the first support means for supplying diamond particles and metal particles (i) in a rotating, diverging pattern that expands from a cyclone nozzle on the supply means and (ii) onto the ferrous metal substrate in the heating zone which is heated by the laser beam to provide the heat to fuse the metal particles to form the metal matrix on the ferrous metal substrate in the presence of a shield gas; (d) a means adjacent the heating zone for supplying the shield gas independent of the nozzle to prevent oxidation of the diamond and metal particles in the heating zone on the ferrous substrate, wherein: (i) the laser beam is capable of bonding the diamond particles to the metal matrix on the ferrous metal substrate at a temperature controlled so as to not degrade the diamond particles to provide the hard faced surface coating in the metal matrix as the hard faced surface coating, and (ii) the apparatus is adapted to deposit multiple tracks of the coating as the hard faced surface.