Patent ID: 9050656
Filing Date: 2015-06-09
Classification: B22C,B22D,B22F,C22C,Y10T

Abstract:
1. A method of making a drill bit comprising: placing matrix material in a bit body mold; placing a metal blank in the bit body mold; placing a binder material in the bit body mold with the binder material proximate the matrix material and the metal blank; and exposing the bit body mold and at least the binder material to microwave radiation to establish at least two temperature zones having different temperatures and heated via the microwave radiation to which each zone within the mold is exposed, wherein the binder material is exposed to microwave radiation focused on the binder material and away from the metal blank using a microwave wave guide, whereby binder material is heated to a selected temperature to allow binder material to melt and to infiltrate matrix material without overheating the metal blank.