SiC whisker toughened ultrafine hard alloy and preparation method and application thereof
A cemented carbide and toughening technology, applied in the field of cemented carbide, can solve the problems of unsuitable high-performance woodworking saw teeth, blades, insufficient bending strength, toughness, unfavorable for popularization and use, etc., to achieve good corrosion resistance, improve The effect of high bending strength, toughness and tensile strength
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Embodiment 1
[0035] A SiC whisker-toughened ultra-fine cemented carbide of the present invention, comprising the following components by mass content: tungsten carbide: 74.62%, tungsten-tantalum complex carbide: 22.0%, cobalt: 1.5%, nickel: 0.5%, dicarbide Trichromium: 0.45%, vanadium carbide: 0.3%, silicon carbide: 0.5%, yttrium: 0.05%, and lanthanum: 0.08%.
[0036] The preparation method of the SiC whisker toughened ultrafine cemented carbide of the present embodiment comprises the following steps:
[0037] (1) Weigh 149.24Kg WC powder (Fischer particle size 0.3μm), 44Kg tungsten-tantalum compound carbide (particle size less than 1μm), 3Kg cobalt powder (near spherical, Fisher particle size 0.6μm), 1Kg nickel hydroxide powder, 0.9KgCr 3 C 2 , 0.6KgVC, 1KgSiC whisker, 0.43KgY (NO 3 ) 3 ·6H 2 O, 0.5KgLa(NO 3 ) 3 ·6H 2 0. 90 liters of absolute ethanol and 1400Kg cemented carbide ball mill rods are added to the ball mill, mixed and wet milled for 100h;
[0038] (2) After the mixture...
Embodiment 2
[0041]A SiC whisker toughened ultra-fine cemented carbide of the present invention, comprising the following components by mass content: tungsten carbide: 69.67%, tungsten-tantalum complex carbide: 27%, cobalt: 1.5%, nickel: 0.5%, dicarbide Trichromium: 0.40%, vanadium carbide: 0.30%, silicon carbide: 0.5%, yttrium: 0.05%, and lanthanum: 0.08%.
[0042] The preparation method of the SiC whisker toughened ultrafine cemented carbide of the present embodiment comprises the following steps:
[0043] (1) Weigh 139.34Kg WC powder (Fischer particle size 0.4μm), 54Kg tungsten-tantalum compound carbide (particle size less than 1μm), 3KgCo powder (near spherical, Fisher particle size 0.6μm), 1KgNi, 0.8Kg Cr 3 C 2 , 0.6KgVC, 1KgSiC whisker, 0.43KgY (NO 3 ) 3 ·6H 2 O, 0.5KgLa(NO 3 ) 3 ·6H 2 0. 90 liters of absolute ethanol and 1400Kg cemented carbide ball mill rods are added to the ball mill, mixed and wet milled for 100h;
[0044] (2) After the mixture in step (1) is sieved, drie...
Embodiment 3
[0047] A SiC whisker-toughened ultra-fine cemented carbide of the present invention, comprising the following components by mass content: tungsten carbide: 66.72%, tungsten-tantalum complex carbide: 30%, cobalt: 1.5%, nickel: 0.5%, dicarbide Trichromium: 0.35%, vanadium carbide: 0.3%, silicon carbide: 0.5%, yttrium: 0.05%, and lanthanum: 0.08%.
[0048] The preparation method of the SiC whisker toughened ultrafine cemented carbide of the present embodiment comprises the following steps:
[0049] (1) Weigh 133.44Kg WC powder (Fischer particle size 0.4μm), 60Kg tungsten-tantalum compound carbide (particle size less than 1μm), 3KgCo powder (near spherical, Fisher particle size 0.6μm), 1KgNi, 0.7Kg Cr 3 C 2 , 0.6KgVC, 1KgSiC whisker, 0.43KgY (NO 3 ) 3 ·6H 2 O, 0.5KgLa(NO 3 ) 3 ·6H 2 0, 90 liters of absolute ethanol, 1400Kg cemented carbide ball mill rod join ball mill, mixed wet mill 100h;
[0050] (2) After the mixture in step (1) is sieved, dried, pressed and formed, it ...
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