Patent ID: 9139893
Filing Date: 2015-09-22
Classification: B22F,C22C

Abstract:
1. A method of fabricating a body of an earth-boring tool, comprising: forming a powder mixture by mixing hard particles, matrix particles comprising a metal matrix material, and an alkylenepolyamine, wherein the alkylenepolyamine comprises less than about 5% by weight of the powder mixture; placing a mold cavity under vacuum, the mold cavity having a shape corresponding to at least a portion of a body of an earth-boring tool; mechanically injecting the powder mixture into the mold cavity under vacuum; applying a maximum pressure of between about 10 pounds per square inch (about 0.07 megapascals) and about 100 pounds per square inch (about 0.7 megapascals) to the powder mixture within the mold cavity to form a green body; and fully sintering the green body to form at least a portion of a body of an earth-boring tool.