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Novel tungsten carbide composite material and its preparation method

A composite material and tungsten carbide technology, applied in the field of new materials, can solve the problem that tungsten carbide composite materials cannot meet high strength, high wear resistance and low viscosity at the same time. The effect of easy availability of raw materials

Inactive Publication Date: 2020-06-09
HARBIN VOCATIONAL & TECHN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: it is difficult for existing tungsten carbide composite materials to meet the requirements of high strength, high wear resistance and low viscosity at the same time

Method used

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  • Novel tungsten carbide composite material and its preparation method

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preparation example Construction

[0022] The present invention also provides a preparation method of the above-mentioned novel tungsten carbide composite material, comprising the following steps:

[0023] a. Mix WC powder and tungsten powder in proportion, heat it to 500-600°C, and keep it warm for 15-20 minutes to decarburize the surface of tungsten carbide to form a mixture of tungsten and tungsten oxide, then pass in argon gas for reduction, and heat to 650 ~750℃, keep warm for 10-20min, and make composite powder of tungsten and tungsten carbide;

[0024] b. Al 2 o 3 , ZrO 2 After the cobalt and germanium dioxide are weighed in proportion, they are added to the composite powder described in step a, and then 100-150 parts of ethanol or water are added, mixed and ball-milled for 15-30 minutes to form a mixed slurry;

[0025] c. Dry the mixed slurry until the amount of water or ethanol is ≤1%, place it in a sintering furnace for sintering, the sintering temperature is 1400-1500°C, the pressure is 40-50MPa, ...

Embodiment 1

[0030] Embodiment 1 prepares tungsten carbide composite material with the inventive method

[0031] The raw material composition is: 80 parts of WC, Al 2 o 3 4 parts, ZrO 2 5 parts, 2 parts cobalt, 3 parts germanium dioxide, 3 parts tungsten powder.

[0032] The preparation steps are as follows:

[0033] a. Mix WC powder and tungsten powder in proportion, heat to 500°C, and keep warm for 15 minutes to decarburize the surface of tungsten carbide to form a mixture of tungsten and tungsten oxide. , to prepare composite powder of tungsten and tungsten carbide;

[0034] b. Al 2 o 3 , ZrO 2 After the cobalt and germanium dioxide are weighed in proportion, they are added to the composite powder described in step a, and then 100 parts of water are added, mixed and ball milled for 15 minutes to form a mixed slurry;

[0035] c. Dry the mixed slurry until the amount of water or ethanol is ≤1%, place it in a sintering furnace for sintering, the sintering temperature is 1400°C, t...

Embodiment 2

[0036] Embodiment 2 prepares tungsten carbide composite material with the inventive method

[0037] The raw material is composed of: 82 parts of WC, Al 2 o 3 6 parts, ZrO 2 8 parts, 4 parts cobalt, 3 parts germanium dioxide, 3 parts tungsten powder.

[0038] The preparation steps are as follows:

[0039] a. Mix WC powder and tungsten powder in proportion, heat to 600°C, and keep warm for 20 minutes to decarburize the surface of tungsten carbide to form a mixture of tungsten and tungsten oxide. , to prepare composite powder of tungsten and tungsten carbide;

[0040] b. Al 2 o 3 , ZrO 2 , after cobalt and germanium dioxide are weighed in proportion, they are added to the composite powder described in step a, and then 150 parts of ethanol are added, mixed and ball milled for 30 minutes to form a mixed slurry;

[0041]c. Dry the mixed slurry until the amount of water or ethanol is ≤1%, place it in a sintering furnace for sintering, the sintering temperature is 1500°C, th...

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Abstract

The invention belongs to the field of novel materials and in particular relates to a novel tungsten carbide composite material and a preparation method thereof. In order to solve the problems that an existing tungsten carbide composite material cannot meet the requirements of high strength, high wear resistance and low viscosity easily, the invention provides the novel tungsten carbide composite material which comprises the following raw materials in parts by weight: 80-82 parts of WC, 4-6 parts of Al2O3, 5-8 parts of ZrO2, 2-4 parts of cobalt, 3-6 parts of germanium dioxide and 3-5 parts of tungsten powder. The invention also provides a preparation method of the composite material. The preparation method comprises the following steps: firstly, compounding tungsten carbide and tungsten powder; and then adding other raw materials to compound. The WC composite material provided by the invention is Al2O3 and ZrO2 ceramic enhanced WC composite material, has very high hardness, wear resistance and oxidation resistance as well as relatively good toughness, and is suitable for being used as a tool, a drill or a mould material. The novel tungsten carbide composite material provided by the invention adopts a simple method, is easily available in raw material, low in cost and suitable for being popularized and used.

Description

technical field [0001] The invention belongs to the field of new materials, and in particular relates to a novel tungsten carbide composite material and a preparation method thereof. Background technique [0002] WC-Co cemented carbide is a common and important cemented carbide type (YG series), which is widely used in the fields of modern cutting tool materials, wear-resistant, corrosion-resistant and high-temperature resistant materials, and is known as the tooth of modern industry . Pure WC material is difficult to sinter densely. Even if sintered densely, the sintering temperature is often above 2000°C. Such a high sintering temperature is also a kind of damage to the device itself, and the fracture toughness after sintering is only 4MPa·m1 / 2. Co is used as a binder phase during WC sintering. WC has very good wettability and can reduce the sintering temperature of WC to 1400°C. Co becomes a liquid phase during sintering, which greatly increases the diffusion rate of WC ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/56C04B35/622C04B35/626C04B35/628
CPCC04B35/5626C04B35/622C04B35/6265C04B35/62842C04B2235/3217C04B2235/3244C04B2235/3287C04B2235/404C04B2235/405C04B2235/77C04B2235/96
Inventor 钟凤芝翟东升王长文高波吴德忠
Owner HARBIN VOCATIONAL & TECHN COLLEGE