SINTERED SOLID ALLOY BASED ON TUNGSTEN CARBIDE AND METHOD FOR PRODUCTION THEREOF Russian patent published in 2019 - IPC C22C1/05 C22C29/08 

FIELD: metallurgy.

SUBSTANCE: invention relates to powder metallurgy, particularly, to sintered hard alloys based on tungsten carbide. It can be used as material of cutting tool for blade processing of hard-to-process steels and alloys, as well as for manufacture of other wear-resistant products. Sintered hard alloy containing tungsten carbide, cementing cobalt-based binder and chromium and/or vanadium carbide, consists of matrix containing binder based on cobalt and tungsten carbide with grain size of 0.3–2 mcm,

and uniformly distributed in the matrix of wear-resistant inclusions with size of 5–10 mcm in amount of 10–40 vol. %, containing a cobalt-based binder and tungsten carbide grains with size of 0.1–0.2 mcm. At that, matrix and inclusions contain different amount of cobalt, and binder, which is part of wear-resistant inclusions, contains η-phase. It is obtained by mixing of wear-resistant inclusions with alloy matrix charge, compaction and sintering. Wear-resistant inclusions are obtained from a mixture containing tungsten carbide powder with carbon content providing formation η-phase, chrome carbide powder and/or vanadium and cobalt powder in an amount different from the amount of cobalt powder in the alloy matrix by mixing, compaction and subsequent grinding until particle size of 5–10 mcm is obtained.

EFFECT: higher wear resistance.

7 cl, 1 tbl, 6 ex