Patent ID: 9435010
Filing Date: 2016-09-06
CPC Classification: B22F,C22C,Y10T

Claim Text:
1. A method of producing an article selected from a composite rotary cutting tool and a composite rotary cuffing tool blank, the method comprising: preparing a hybrid cemented carbide blend comprising sintered granules of a first cemented carbide grade, and unsintered granules of a second cemented carbide grade, wherein at least one of the first cemented carbide grade and the second cemented carbide grade comprises at least 0.5 percent by weight of cubic carbide; placing the hybrid cemented carbide blend into a first region of a void of a mold; placing a metallurgical powder into a second region of the void, contacting at least a portion of the hybrid cemented carbide blend with the metallurgical powder; consolidating the hybrid cemented carbide blend and the metallurgical powder to form a compact; and over-pressure sintering the compact to provide a sintered compact including an elongate body comprising a core region autogenously bonded to an outer region coaxial with the core region, wherein the core region is formed of the metallurgical powder and the outer region is formed of the hybrid cemented carbide blend.