A fine-grained cemented carbide material and a method for producing the same

Abstract

The application discloses a fine-grained hard alloy material and a preparation method thereof, relates to the field of hard alloys, and mixes tungsten carbide powder, a composite powder and a forming agent, ball-mills to obtain slurry; the preparation method of the composite powder is as follows: plant fibers are first soaked in water, taken out, frozen at-50 DEG C to-30 DEG C, then dried at 20-40 DEG C, broken, soaked in oxalic acid solution for 30-50 min; CoCl2 and NH4VO3 are continuously added, after reaction, filtration, the filter residue is calcined at 600-800 DEG C, and cooled to obtain; S2: the slurry is pressed into shape, sintered, and obtained. The fine-grained hard alloy material is prepared by mixing the composite powder with tungsten carbide, sintering, grain refinement, and no coarse inclusion; the composite powder can effectively inhibit the dissolution and precipitation of W and C atoms, reduce the growth rate and probability of WC in the binder phase through dissolution and precipitation, and refine WC grains.

Images