CUTTER PLATE OR HEAD OF TOOL FOR APPLICATION IN MINING INDUSTRY AND CONSTRUCTION AND METHOD OF THEIR FABRICATION Russian patent published in 2009 - IPC E21B10/46 B22F3/12 C22C29/08 

FIELD: metallurgy.

SUBSTANCE: proposed invention relates to powder metallurgy immediately dealing with fabrication of carbide tools such as a cutter plate or head. The proposed tool is to be used in mining industry and construction. The cutter plate is fabricated of a hard alloy metal containing tungsten carbide and a cobalt and/or nickel binder. The plate has an inner part and at least one surfacial part characterised by smaller grain size and lesser binder content as compared to the inner part. The maximum binder content is observed between the surfacial and the inner parts. The plate is fabricated via a powder metallurgy method envisaging a blank pressure moulding, application of an admixture providing for the grain refinement and containing carbon and/or nitrogen onto at least part of the blank surface and sintering. Thus manufactured, the plate is characterised by high-grade strength and impact viscosity.

EFFECT: fabrication of a cutter plate characterised by high-grade strength and impact viscosity.

10 cl, 3 dwg, 1 tbl, 1 ex