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A kind of cemented carbide for diamond coating and preparation method thereof

A technology of diamond coating and cemented carbide, applied in the field of cemented carbide, can solve the problem of easy falling off of diamond film, and achieve the effect of reducing adverse effects and preventing falling off

Active Publication Date: 2021-01-12
昆山长野超硬合金有限公司
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Problems solved by technology

[0004] The other is to chemically remove the cobalt on the alloy surface from the cemented carbide substrate material. Although the effect of the alloy diamond coating after the removal of cobalt is good, only the WC skeleton remains on the alloy surface, and the diamond film after coating is easy to fall off.

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  • A kind of cemented carbide for diamond coating and preparation method thereof

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Embodiment Construction

[0017] Please refer to figure 1 Shown, the present invention discloses a kind of cemented carbide for diamond coating and preparation method thereof, preparation method comprises the steps:

[0018] (1). Ingredients, the materials are taken according to the mass percentage, cobalt is 2.5%-3.5%, tantalum carbide is 0.5%-1%, and the balance is tungsten carbide, that is, tungsten carbide is 95.5%-97.0%;

[0019] (2). For ball milling, use grade YG6X Φ10 alloy balls (HRA 90.5-92) as grinding body, ball-to-material ratio = 3:1, use absolute ethanol as grinding medium, purity ≥ 95%, mix 0.2L per kg of mixture Anhydrous ethanol, send the above materials into a 180L wet mill for ball milling, the time is 72h, the speed of the wet mill is set at 35r / min, during the wet milling process, the temperature of the wet mill barrel is ≤40°C, and the material is unloaded after the grinding is completed , filter the sediment through a 320-mesh sieve;

[0020] (3). Add wax for drying, put the s...

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Abstract

A cemented carbide for diamond coating and a preparation method thereof, comprising the following materials by mass percentage: 2.5%-3.5% of cobalt, 0.5%-1% of tantalum carbide, and 95.5%-97.0% of tungsten carbide. The hardness of cemented carbide is greater than 92.9HRA, and the bending strength is greater than 2600N / mm 2 , the preparation method includes ball milling, wax drying, granulation, molding, pressure sintering and fine grinding, and the prepared cemented carbide can be perfectly and stably combined with diamond.

Description

technical field [0001] The invention relates to the technical field of hard alloys, in particular to a hard alloy used for diamond coating and a preparation method thereof. Background technique [0002] At present, the cobalt content in the diamond-coated matrix cemented carbide material on the market is more than 7%, and the higher cobalt content hinders the formation of the diamond film. [0003] Cobalt in cemented carbide has a relatively large negative effect on diamond electroplating, and its negative effects are as follows: delay and hinder the nucleation and growth of diamond; catalyze the formation of non-diamond carbon, such as graphite and amorphous carbon; Dissolving the diamond coating etc. during the growth of the diamond film. The higher the cobalt content of the alloy, the greater the negative effect. [0004] The other is to chemically remove the cobalt on the alloy surface from the cemented carbide substrate material. Although the effect of the alloy diamo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C29/08C22C1/05B22F3/14B22F3/24
CPCC22C1/051C22C29/067C22C29/08B22F3/14B22F3/24B22F2003/247B22F2998/10B22F1/10B22F3/02
Inventor 黄启君李璐赵振宙谢志勇
Owner 昆山长野超硬合金有限公司