PROCESS FOR PRODUCING PELLETS FROM DIAMOND PARTICLES WITH METAL COATING, PELLETS FORMED IN SUCH A MANNER AND PROCESS FOR PRODUCING SEGMENTS OF SAW BLADES FROM THESE PELLETS

摘要

A method for making metal-clad particle pellets, comprises the steps of : (a) coating diamond particles with a carbide-forming metal; (b) spraying onto a bed of gas-fluidized coated abrasive particles of step (a) a slurry of metallic powder, a binding agent, and a volatile solvent, for a time until each abrasive particle is outer coated with at least about 20 wt-% of said metallic powder, said metallic powder having a sintering temperature that is at least about 500C lower than the melting point temperature of said carbide-forming metal; (c) recovering said metal powder-coated abrasive pellets of step (b) substantially devoid of said volatile solvent; (d) heating said recovered coated abrasive pellets under conditions to form a sintered continuous outer metal coating on said abrasive pellets; and (e) heating said pellets of step (d) at a second higher temperature to liquefy said carbide-forming metal for forming some metal carbide from said diamond particle. The resulting dual metal-clad abrasive pellets may be used to form an abrasive particle-containing metal saw blade segment of desired abrasive particle concentration. IMAGE