Multiple grade cemented carbide inserts for metal working and method of making the same
November 9, 2021. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3482295 Cemented carbide Method of fabrication of rock bit inserts of tungsten carbide (WC) and cobalt (Co) with cutting surface wear pad of relative hardness and body portion of relative toughness sintered as an integral composite Cemented carbide body used preferably for rock drilling and mineral cutting Cemented carbide drill Method and apparatus for manufacturing finished parts as composite bodies from pulverulent rolling materials Diamond tools for rock drilling, metal cutting and wear part applications Method of making composite cermet articles and the articles Multiple grade cemented carbide articles and a method of making the same Method of molding green bodies InventorsAssigneeApplicationNo. 986713 filed on 11/09/2001US Classes:419/6, Powder next to powder419/18, Tungsten carbide419/38Consolidation of powder prior to sinteringExaminersPrimary: Jenkins, Daniel J.Attorney, Agent or FirmForeign Patent References
International ClassesB22F 007/00B22F 007/06 B22F 003/12 Foreign Application Priority Data2003-11-22 SEAbstractA cemented carbide insert of a first grade has at least one cutting point consisting of a cemented carbide of a second grade with different composition and/or grain size with an uneven transition zone between the first and second grade. | |
