CUTTING TOOL Russian patent published in 2020 - IPC B22F5/00 C22C29/08 B22F7/08 B22F3/12 

FIELD: metallurgy; manufacturing technology.

SUBSTANCE: group of inventions relates to the manufacture of a cutting tool. Cutting tool comprises hard alloy substrate. Hard alloy contains WC and a binder phase containing one or more of Co, Fe and Ni. Solid alloy also contains an eta-phase containing carbides Me₁₂C and/or Me₆C, where Me is one or more metals selected from W, Mo and metals of the binder phase. Substeichiometric content of carbon in solid alloy ranges from −0.30 to −0.16 wt %. Method of making a cutting tool comprises providing a powder which forms solid constituent parts containing WC powder, providing a powder selected from Co, Fe and Ni, forming a phase of binder, providing liquid for grinding, milling, drying, pressing and sintering powders into hard alloy. One or more of W, W₂C, Mo or Mo₂C is added in such an amount that the sub-stoichiometric content of carbon in the sintered solid alloy ranges from −0.30 to −0.16 wt %.

EFFECT: improved resistance of the cutting tool to cracking.

13 cl, 4 tbl, 4 ex, 6 dwg