Wear-resistant cemented carbide and preparation method thereof
A cemented carbide and anti-corrosion technology, applied in the field of cemented carbide, can solve the problems such as the inability to balance wear resistance and toughness, and achieve the effect of improving comprehensive performance, strong corrosion resistance and improving impact resistance.
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[0029] Another aspect of the present invention provides a method for preparing a corrosion-resistant cemented carbide, comprising the following steps:
[0030] Prepare raw materials according to the composition of the corrosion-resistant cemented carbide;
[0031] The tungsten carbide mixed powder and the nickel powder are mixed and batched, and sintered to obtain a wear-resistant hard alloy.
[0032] The preparation method of the corrosion-resistant cemented carbide can be prepared according to the conventional preparation method, such as the preparation method of the corrosion-resistant cemented carbide whose raw materials only contain tungsten carbide and nickel powder.
[0033] Optionally, the steps of wet grinding, drying with forming agent, granulation and compression molding are sequentially included between mixing ingredients and sintering.
[0034] Optionally, the ball milling medium for wet milling is acetone and n-hexane, the ratio of ball to material is 3.3:1, the...
Embodiment 1
[0039] A preparation method of an anti-corrosion cemented carbide, which comprises the following process steps: batching, wet grinding, drying mixed with a forming agent, granulation, compression molding and vacuum low-pressure integrated sintering.
[0040] The mixed powder of nickel powder and tungsten carbide is used for batching, and the mass ratio of nickel powder and tungsten carbide mixed powder is 5:95. In the tungsten carbide mixed powder, the tungsten carbide mixed powder is mixed with conventional tungsten carbide powder with Fsss particle size of 6.8 μm and cast tungsten carbide powder with Fsss particle size of 2.0 μm in a mass ratio of 50:50. The carbon content (total carbon) of conventional tungsten carbide powder is 6.12wt%, and the carbon content (total carbon) of cast tungsten carbide powder is 3.2wt%. The particle size of the nickel powder is 1.25 μm.
[0041] Wet milling is ball milling, the ball milling medium is acetone and n-hexane, the ratio of ball to...
Embodiment 2
[0044] A preparation method of an anti-corrosion cemented carbide, which comprises the following process steps: batching, wet grinding, drying mixed with a forming agent, granulation, compression molding and vacuum low-pressure integrated sintering.
[0045] The mixed powder of nickel powder and tungsten carbide is used for batching, and the mass ratio of nickel powder and tungsten carbide mixed powder is 8:92. In the tungsten carbide mixed powder, the tungsten carbide mixed powder is mixed with conventional tungsten carbide powder with Fsss particle size of 7.8 μm and cast tungsten carbide powder with Fsss particle size of 3.2 μm in a mass ratio of 70:30. The carbon content (total carbon) of conventional tungsten carbide powder is 6.15wt%, the carbon content (total carbon) of cast tungsten carbide powder is 4.5wt%; the particle size of nickel powder is 1.45μm.
[0046] Wet milling is ball milling, the ball milling medium during wet milling is acetone and n-hexane, the ratio o...
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Abstract
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