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Binder, 5-15 micron tungsten carbide powder and preparation method of 5-15 micron tungsten carbide powder
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A binder and tungsten carbide technology, applied in the field of materials, can solve the problems of low powder yield, poor powder particle shape, unfavorable ultra-fine particle size droplets, etc., and achieve the effect of good shape and good strength
Active Publication Date: 2022-06-03
BEIJING MINING & METALLURGICAL TECH GRP CO LTD +1
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[0004] The binders used in the preparation of tungsten carbide powder in the past include paraffin wax, buna rubber, polyethylene, polyethylene glycol, methyl cellulose, polyvinyl alcohol, etc. Micron, 10~38 micron, 5~30 micron particle size WC-Co powder has good formability and strength in the process, but when preparing 5-15 micron powder, the viscosity is high, which is not conducive to ultra-fine particle size liquid The formation of droplets; simply increasing the pressure of spray granulation will result in poor particle morphology, which is not conducive to the subsequent process
Low yield of powder, generally 10~30%
Method used
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[0034] A preparation method of 5-15 micron tungsten carbide powder, comprising:
Mix the tungsten carbide powder, the mixed metal powder, the binder and the solvent, and ball-mill to obtain the slurry;
The slurry is spray-dried to obtain pre-sintered powder, and then the pre-sintered powder is sintered and pulverized to obtain the 5-15 micron tungsten carbide powder.
[0035] In an optional embodiment, the compound metal powder includes cobalt powder and / or chromium powder;
In an optional embodiment, the mass ratio of the total mass of the tungsten carbide powder and the complex metal powder to the binder is 100:(3-10).
[0036] Optionally, the mass ratio of the total mass of the tungsten carbide powder and the matched metal powder to the binder may be 100:3, 100:4, 100:5, 100:6, 100:7, 100 : 8, 100: 9, 100: 10, or 100: any value between (3-10).
[0037] In an alternative embodiment, the solvent includes water or alcohol.
[0038] In an optional embodiment, the preparati...
Embodiment 1
This embodiment provides an adhesive comprising 10 kg of water-based modified acrylic resin and 5 kg of curing agent.
[0048] Wherein, the preparation method of the curing agent includes: mixing 15kg of diethylenetriamine, 10kg of ethylene glycol glycidyl ether, and 35kg of deionized water, then adding 40kg of bisphenol A epoxy resin (E-51), stirring and mixing evenly , formulated as a curing agent.
[0049] The water-based modified acrylic resin and the curing agent are stirred and mixed evenly to prepare a binder.
[0050] This embodiment also provides a preparation method of 5-15 micron tungsten carbide powder, including:
Mix 88kg of tungsten carbide powder, 12kg of cobalt powder, and 35kg of deionized water, and ball-milled in a ball mill for 48 hours;
Add 5.4kg of binder, continue ball milling for 2 hours, and prepare slurry;
[0053] The preparation method of the curing agent includes: mixing 25kg of diethylenetriamine, 15kg of ethylene glycol glycidyl ether, and 35kg of deionized water, then adding 25kg of bisphenol A epoxy resin (E-44), stirring and mixing evenly , formulated as a curing agent.
[0054] The water-based modified acrylic resin and the curing agent are stirred and mixed evenly to prepare a binder.
[0055] This embodiment also provides a preparation method of 5-15 micron tungsten carbide powder, including:
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Abstract
The invention provides a binder, 5-15 micron tungstencarbidepowder and a preparation method of the 5-15 micron tungstencarbidepowder. The binder comprises water-based modified acrylic resin and a curing agent; the curing agent comprises 25%-40% of liquid bisphenol A epoxy resin, 15%-25% of diethylenetriamine or diethylaminopropylamine, 10%-15% of ethylene glycol glycidyl ether and the balance of water; the volume ratio of the water-based modified acrylic resin to the curing agent is 10: (4-6). The preparation method of the 5-15 micron tungstencarbidepowder comprises the following steps: mixing tungsten carbide powder, cobalt powder, a binder and a solvent, and carrying out ball milling to obtain slurry; the slurry is subjected to spray drying to obtain pre-sintered powder, and then the pre-sintered powder is sintered and smashed to obtain tungsten carbide powder of 5-15 micrometers. The invention discloses tungsten carbide powder of 5-15 microns. The tungsten carbide powder of 5-15 microns is prepared by using a preparation method of the tungsten carbide powder of 5-15 microns. According to the binder provided by the invention, the prepared tungsten carbide powder is good in morphology and high in yield.
Description
technical field [0001] The present application relates to the field of materials, in particular to a binder, a 5-15 micron tungsten carbide powder and a preparation method thereof. Background technique [0002] Tungsten carbide / cobalt carbide has the characteristics of high hardness and good toughness. Thermal sprayed tungsten carbide coatings have been widely used in aerospace, metallurgy, petrochemical, machinery and other industries. Common spraying processes include: plasma spraying, flame spraying, and supersonic flame spraying. The supersonic flame spraying process is especially suitable for the spraying of tungsten carbide / cobalt materials, and the powder particle size is generally 22~53 microns, 15~45 microns, 10~38 microns, 5~30 microns. With the development of supersonic flame spraying technology, the thermal spraying industry has more and more demand for ultra-fine particle size tungsten carbide powder, that is, the demand for 5-15 micron powder is gradually incr...
Claims
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