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Method for preparing nanometer tungsten carbide-cobalt hard alloy material

A nano-tungsten carbide and cemented carbide technology, which is applied in the field of alloy materials, can solve the problems of low electrical conductivity and low strength, and achieve the effects of high density, long service life and strong cutting ability.

Inactive Publication Date: 2016-02-03
江苏和田科技材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Tungsten carbide has the advantages of high hardness, high melting point, low electrical and thermal conductivity, etc. It is an ideal material for preparing alloy milling inserts for CNC machine tools, but pure tungsten carbide powder is rarely used alone, and is generally mixed with other high-quality tungsten carbide powder Precious alloys with high hardness, such as cobalt powder, are used to make solid solutions, and then prepared into milling blades. In the prior art, most of the tungsten carbide and other precious metals of about 0.5 microns are sintered into solid solutions. Milling blades made of this material Generally, the greater the hardness, the lower the strength

Method used

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preparation example Construction

[0014] A preparation method of nanometer tungsten carbide-cobalt hard alloy material, raw material percentage by weight: 50-100nm tungsten carbide nanopowder 30%, 70-100nm cobalt nanopowder 65%, dehydrated alcohol 5%;

[0015] The preparation steps are:

[0016] a. The tungsten carbide nano-powder and the cobalt nano-powder are mixed by ball milling in absolute ethanol medium, the ball milling speed is controlled to 150r / min, and the mixing time is 3 hours;

[0017] b. Granulation;

[0018] c. Drying, the mixture powder is dried at 50-70°C for 2 hours;

[0019] d. Vacuum sintering, the sintering temperature is 1300°C, and the sintering time is 5s.

specific Embodiment approach 2

[0020] A preparation method of nanometer tungsten carbide-cobalt hard alloy material, raw material percentage by weight: 50-100nm tungsten carbide nanopowder 80%, 70-100nm cobalt nanopowder 17%, dehydrated alcohol 3%;

[0021] The preparation steps are:

[0022] a. The tungsten carbide nanopowder and the cobalt nanopowder are ball milled and mixed in an anhydrous ethanol medium, the ball milling speed is controlled to 170r / min, and the mixing time is 2 hours;

[0023] b. Granulation;

[0024] c, drying, the mixture powder is dried at 50-70°C for 3 hours;

[0025] d. Vacuum sintering, the sintering temperature is 1380°C, and the time is 3s.

specific Embodiment approach 3

[0026] A preparation method of nanometer tungsten carbide-cobalt hard alloy material, raw material percentage by weight: 50-100nm tungsten carbide nanopowder 60%, 70-100nm cobalt nanopowder 33%, dehydrated alcohol 7%;

[0027] The preparation steps are:

[0028] a. The tungsten carbide nanopowder and the cobalt nanopowder are mixed by ball milling in an anhydrous ethanol medium, the ball milling speed is controlled to 130r / min, and the mixing time is 4 hours;

[0029] b. Granulation;

[0030] c, drying, the mixture powder is dried at 50-70°C for 3 hours;

[0031] d. Vacuum sintering, the sintering temperature is 1500°C, and the sintering time is 1s.

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Abstract

Provided is a method for preparing a nanometer tungsten carbide-cobalt hard alloy material. The raw material comprises, by weight percentage, 30-80% of 50-100 nm of tungsten carbide nanometer powder, 15-65% of 70-100 nm of cobalt nanometer powder and 3-10% of absolute ethyl alcohol. The method comprises a step a of performing ball-milling mixing of the tungsten carbide nanometer powder and the cobalt nanometer powder in an absolute ethyl alcohol medium, controlling the ball-milling rotating speed to be 130-170 r / min, and causing the mixing time to be 2-4 h; a step b of performing granulation; a step c of performing drying, drying the mixture powder at 50-70 DEG C, and causing the time to be 2-3 h; a step d of performing vacuum sintering, causing the sintering temperature to be 1300-1500 DEG C, and causing the time to be 1-5 s. An alloy cutter made of the material is high in compactness and cutting capability and long in service life.

Description

technical field [0001] The invention relates to the field of alloy materials, in particular to a preparation method of nanometer tungsten carbide-cobalt hard alloy material. Background technique [0002] Tungsten carbide has the advantages of high hardness, high melting point, low electrical and thermal conductivity, etc. It is an ideal material for preparing alloy milling inserts for CNC machine tools, but pure tungsten carbide powder is rarely used alone, and is generally mixed with other high-quality tungsten carbide powder Precious alloys with high hardness, such as cobalt powder, are used to make solid solutions, and then prepared into milling blades. In the prior art, most of the tungsten carbide and other precious metals of about 0.5 microns are sintered into solid solutions. Milling blades made of this material Generally, the greater the hardness, the lower the strength. Contents of the invention [0003] Purpose of the invention: the purpose of the invention is t...

Claims

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Application Information

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IPC IPC(8): C22C1/05C22C29/08C22C32/00C22C19/07
Inventor 汤锡明
Owner 江苏和田科技材料有限公司
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