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Tungsten titanium tantalum cobalt hard alloy coated with silicon dioxide and preparation method of tungsten titanium tantalum cobalt hard alloy

A silicon dioxide and cemented carbide technology, applied in the field of alloys, can solve the problems of unfavorable long-term use and low density, and achieve the effects of prolonging service life, improving strength and toughness, high density and hardness

Inactive Publication Date: 2015-01-28
HEYUAN YUEAO CEMENTED CARBIDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that, due to the high willfulness and strength of the alloy material, but the density of the same material is not high, it is not conducive to long-term use at high temperature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] According to the preparation method of silica-coated tungsten-tantalum-cobalt cemented carbide provided by the present invention, silica-coated tungsten-titanium-tantalum-cobalt cemented carbide is prepared, and the preparation steps are as follows:

[0028] (1) tungsten carbide 75wt%, titanium dioxide 14wt%, tantalum oxide 6wt% and superfine cobalt powder 5wt%, mix uniformly;

[0029] (2) Put the mixture into a high-temperature carbonization furnace for carbonization at a temperature of 2200°C for 2 hours;

[0030] (3) After the carbonization is finished, wait to be cooled to room temperature, take out the mixture, and grind it to a powder with an average particle size of 3um;

[0031] (4) Put the powder into the chemical vapor deposition reaction chamber, evacuate to 30Pa, preheat to 700°C, use tetraethyl orthosilicate as the raw material, control the evaporation temperature of the raw material to 100°C, and pass in argon, argon The gas flow rate is 20sccm, the rotat...

Embodiment 2

[0035] According to the preparation method of silica-coated tungsten-tantalum-cobalt cemented carbide provided by the present invention, silica-coated tungsten-titanium-tantalum-cobalt cemented carbide is prepared, and the preparation steps are as follows:

[0036] (1) tungsten carbide 60wt%, titanium dioxide 22wt%, tantalum oxide 8wt% and superfine cobalt powder 10wt%, mix uniformly;

[0037] (2) Put the mixture into a high-temperature carbonization furnace for carbonization at a temperature of 2200°C for 2 hours;

[0038] (3) After the carbonization is finished, wait to be cooled to room temperature, take out the mixture, and grind it to a powder with an average particle size of 3um;

[0039] (4) Put the powder into the chemical vapor deposition reaction chamber, evacuate to 30Pa, preheat to 800°C, use tetraethyl orthosilicate as the raw material, control the evaporation temperature of the raw material to 120°C, and pass in argon, argon The gas flow rate is 30sccm, the rota...

Embodiment 3

[0043] According to the preparation method of silica-coated tungsten-tantalum-cobalt cemented carbide provided by the present invention, silica-coated tungsten-titanium-tantalum-cobalt cemented carbide is prepared, and the preparation steps are as follows:

[0044] (1) tungsten carbide 68wt%, titanium dioxide 16wt%, tantalum oxide 8wt% and superfine cobalt powder 8wt%, mix uniformly;

[0045] (2) Put the mixture into a high-temperature carbonization furnace for carbonization at a temperature of 2200°C for 2 hours;

[0046] (3) After the carbonization is finished, wait to be cooled to room temperature, take out the mixture, and grind it to a powder with an average particle size of 3um;

[0047] (4) Put the powder into the chemical vapor deposition reaction chamber, evacuate to 10Pa, preheat to 700°C, use tetraethyl orthosilicate as the raw material, control the evaporation temperature of the raw material to 100°C, and pass in argon, argon The gas flow rate is 40sccm, the rotat...

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Abstract

The invention relates to a tungsten titanium tantalum cobalt hard alloy coated with the silicon dioxide and a preparation method of the tungsten titanium tantalum cobalt hard alloy, and relate to the technical field of alloy. The hard alloy comprises a basal body and a coating layer; the basal body contains main ingredients such as tungsten carbide, titanium carbide, tantalum carbide and cobalt, the coating layer is a SiO2 amorphous nano layer, and the thickness of the SiO2 amorphous nano layer is 50nm to 200nm. The preparation method of the tungsten titanium tantalum cobalt hard alloy coated with the silicon dioxide comprises the following steps: (1) taking materials, and uniformly mixing; (2) carbonizing at a high temperature; (3) grinding into powder; (4) chemical vapor deposition; (5) calcination at a high temperature. The coated hard alloy material is high in compactness and hardness, the strength and flexibility are also enhanced, the high temperature resistance is more ideal, the cutting speed is increased when the tungsten titanium tantalum cobalt hard alloy is used as a high-speed cutting tool, and the service life of the cutter can be effectively prolonged.

Description

technical field [0001] The invention belongs to the field of alloy technology, in particular to a high-density, high-performance tungsten-titanium-tantalum-cobalt hard alloy cutting tool material and a preparation method thereof. Background technique [0002] Cemented carbide is an alloy material made of hard compounds of refractory metals and bonding metals through powder metallurgy. Cemented carbide has a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance and corrosion resistance, especially its high hardness and wear resistance, which basically remain unchanged even at a temperature of 500°C , It still has high hardness at 1000 °C. The cutting speed of cemented carbide cutting tools is 4-7 times higher than that of high-speed steel, and the tool life is 5-80 times higher. Manufacture molds and measuring tools, the service life is 20-150 times higher than that of alloy tool steel, and it can cut hard materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/08C22C1/05
CPCC22C1/051C22C29/08
Inventor 翟红波杨振枢韦洪屹
Owner HEYUAN YUEAO CEMENTED CARBIDE