Patent ID: 9192989
Filing Date: 2015-11-24
Classification: B22F,B24D,E21B

Abstract:
1. A method of forming a bit body of an earth-boring rotary drill bit, the method comprising: forming a first component, wherein the first component is fully sintered; forming at least a second component having an organic binder material, wherein the at least a second component is less than fully sintered, the at least a second component having a sinter-shrink rate greater than any sinter-shrink rate of the first component due at least in part to the organic binder material within the at least a second component; and co-sintering the first component and the at least a second component to a final density to form at least a portion of an earth-boring rotary drill bit, the co-sintering causing the second component to shrink around and at least partially capture the first component, wherein co-sintering the first component and the at least a second component comprises at least substantially removing the organic binder material from within the at least a second component.