Method for preparing nanometer tungsten carbide-cobalt hard alloy material
A nano-tungsten carbide and cemented carbide technology, which is applied in the field of alloy materials, can solve the problems of low electrical conductivity and low strength, and achieve the effects of high density, long service life and strong cutting ability.
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[0014] A preparation method of nanometer tungsten carbide-cobalt hard alloy material, raw material percentage by weight: 50-100nm tungsten carbide nanopowder 30%, 70-100nm cobalt nanopowder 65%, dehydrated alcohol 5%;
[0015] The preparation steps are:
[0016] a. The tungsten carbide nano-powder and the cobalt nano-powder are mixed by ball milling in absolute ethanol medium, the ball milling speed is controlled to 150r / min, and the mixing time is 3 hours;
[0017] b. Granulation;
[0018] c. Drying, the mixture powder is dried at 50-70°C for 2 hours;
[0019] d. Vacuum sintering, the sintering temperature is 1300°C, and the sintering time is 5s.
specific Embodiment approach 2
[0020] A preparation method of nanometer tungsten carbide-cobalt hard alloy material, raw material percentage by weight: 50-100nm tungsten carbide nanopowder 80%, 70-100nm cobalt nanopowder 17%, dehydrated alcohol 3%;
[0021] The preparation steps are:
[0022] a. The tungsten carbide nanopowder and the cobalt nanopowder are ball milled and mixed in an anhydrous ethanol medium, the ball milling speed is controlled to 170r / min, and the mixing time is 2 hours;
[0023] b. Granulation;
[0024] c, drying, the mixture powder is dried at 50-70°C for 3 hours;
[0025] d. Vacuum sintering, the sintering temperature is 1380°C, and the time is 3s.
specific Embodiment approach 3
[0026] A preparation method of nanometer tungsten carbide-cobalt hard alloy material, raw material percentage by weight: 50-100nm tungsten carbide nanopowder 60%, 70-100nm cobalt nanopowder 33%, dehydrated alcohol 7%;
[0027] The preparation steps are:
[0028] a. The tungsten carbide nanopowder and the cobalt nanopowder are mixed by ball milling in an anhydrous ethanol medium, the ball milling speed is controlled to 130r / min, and the mixing time is 4 hours;
[0029] b. Granulation;
[0030] c, drying, the mixture powder is dried at 50-70°C for 3 hours;
[0031] d. Vacuum sintering, the sintering temperature is 1500°C, and the sintering time is 1s.
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