C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 3/14 (2006.01) B24D 99/00 (2010.01) B23D 65/00 (2006.01) B24D 3/06 (2006.01) B24D 18/00 (2006.01) B28D 1/12 (2006.01) B24D 17/00 (2006.01)
Patent
CA 2076119
6OSDOO584 DUAL-COATED DIAMOND PELLETS AND SAW BLADE SEGMENTS MADE THEREWITH ABSTRACT OF THE DISCLOSURE One aspect of the present invention is a method for making metal-clad particle pellets, which 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) aslurry 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 50°C 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 form yet another aspect of the present invention. Another aspect comprises: (a) placing a plurality of abrasive pellets, each comprising an abrasive particle coated with at least about 20 wt-% sintered metal, metal pellets devoid of abrasive particles, and a source of braze metal in a mold cavity; and (b) heating the contents of said mold cavity under conditions of temperature, pressure, and atmosphere to form an abrasive particle-containing metal saw blade segment of desired abrasive particle concentration.
Company General Electric
Craig Wilson And Company
LandOfFree
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