Reed Tool Company

Reed Rock Bit Company

Robert P Badrak

Terry H Mayo

A hardened bearing surface (36, 38, 42, 48, 50, 51 and 52) on a component (14, 16) of a rotary cutter drill bit (10) and the method of forming same. A composite mix (60) of alloy material (56) and base material (54) forms the hardened bearing surface (36, 38, 42, 48, 50, 51 and 52) with the alloy material (56) consisting of at least ten (10) percent of the adjacent base material (54) and of an optimum of around fifty (50) percent. The alloy material (56) of predetermined amounts of predetermined elements is positioned on the base material (54) and a precisely controlled high energy density source, such as a laser beam (58), melts the alloy material (56) and adjacent base material (56) to form the composite mix (60) defining the hardened bearing surface.

Hardened bearing surface and method of forming same

A method is disclosed for manufacturing cutting elements of powdered tungsten carbide which involves sintering the powder into a solid element and then thermo-cycling the part to reduce internal defects.

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Missouri City, TX, United States of America

Robert P Badrak