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A kind of industrial preparation method of nano w/wc composite powder

A composite powder, nanotechnology, applied in nanotechnology, nanotechnology, metal processing equipment and other directions, can solve problems such as immaturity, and achieve the effect of promoting reduction reaction and uniform powder particle size distribution

Active Publication Date: 2019-01-22
XIAMEN TUNGSTEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the technology for batch production of nano-tungsten powder in my country is still immature, and only a few foreign companies can produce nano-tungsten powder

Method used

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  • A kind of industrial preparation method of nano w/wc composite powder
  • A kind of industrial preparation method of nano w/wc composite powder
  • A kind of industrial preparation method of nano w/wc composite powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 1 kg WO 3 , 0.012 kg Co 3 o 4 and 0.43 kg of glucose (C 6 h 12 o 6 ), first put WO 2.9 、Co 3 o 4 Ball milling and mixing with absolute ethanol, the mass ratio of balls to powder is 10:1, the volume ratio of absolute ethanol to material is 1:1, the speed of the ball mill is 100r / min, and the milling time is 60 hours. Glucose powder was added to the mixed oxide powder, and anhydrous ethanol having an equal volume ratio to the glucose powder was added for secondary ball milling. The ball milling speed was 70r / min, and the ball milling time was 15h. Place the above powder in a vacuum furnace for reaction with a vacuum degree of 10 Pa. First, heat it to 160°C and keep it for 30 minutes, then raise the temperature to 400°C and keep it for 3 hours, and finally raise the temperature to 950°C and keep it for 3 hours to prepare a nanocomposite with WC distributed on the W matrix. Powder, wherein the mass ratio of WC is 10%. In this embodiment, the morphology of the...

Embodiment 2

[0022] Weigh 1 kg WO 3 , 0.05 kg Co 3 o 4 and 0.45 kg glucose (C 6 h 12 o 6 ), first put WO 3 、Co 3 o 4 Mixed ball milling with absolute ethanol, the mass ratio of balls to powder is 5:1, the volume ratio of absolute ethanol to material is 1:1, the rotational speed of the ball mill is 300r / min, and the ball milling time is 70 hours. Glucose powder was added to the mixed oxide powder, and anhydrous ethanol with an equal volume ratio to the glucose powder was added to carry out secondary ball milling. The ball milling speed was 80r / min, and the ball milling time was 10h. Put the above powder in a vacuum furnace for reaction with a vacuum degree of 0.1 Pa. First, heat it to 180°C and keep it for 15 minutes, then raise the temperature to 500°C and keep it for 2 hours, and finally raise the temperature to 1100°C and keep it for 2 hours to prepare WC nano Composite powder, wherein the mass ratio of WC is 15%. The morphology and particle size distribution of the tungsten-bas...

Embodiment 3

[0024] Weigh 1 kg WO 2.9 , 0.1 kg Co 3 o 4 and 0.5 kg glucose (C 6 h 12 o 6 ), first put WO 2.9 、Co 3 o 4 The powder and absolute ethanol are mixed for ball milling, the mass ratio of balls to powder is 3:1, the volume ratio of absolute ethanol to material is 1:1, the rotational speed of the ball mill is 500r / min, and the ball milling time is 80 hours. Glucose powder was added to the mixed oxide powder, and anhydrous ethanol having an equal volume ratio to the glucose powder was added for secondary ball milling. The ball milling speed was 50 r / min, and the ball milling time was 20 h. Put the above powder in a vacuum furnace for reaction with a vacuum degree of 0.02 Pa. First, heat it to 150°C and keep it for 60 minutes, then raise the temperature to 350°C and keep it for 4 hours, and finally raise the temperature to 850°C and keep it for 5 hours. Composite powder, wherein the mass ratio of WC is 20%. The phase detection results of the tungsten-based composite powder p...

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Abstract

The invention discloses an industrial preparation method of nanometer W / WC composite powder, which belongs to the technical field of refractory metal and powder metallurgy. Using tungsten oxide, cobalt oxide and glucose as raw materials, the mass ratio of cobalt oxide: tungsten oxide: glucose is 1: (10-85): (4.5-43). The oxide is subjected to high-energy ball milling; then glucose powder and absolute ethanol are added for secondary ball milling; the reaction is carried out in a vacuum furnace, the vacuum degree in the furnace is less than 10Pa, firstly heated to 150-180°C and kept for 15-60min, and then heated to 350°C Heat at ~500°C for 2-4 hours, and finally raise the temperature to 850-1100°C for 2-5 hours. Finally, a nanocomposite powder in which tungsten carbide powder is distributed on the tungsten powder matrix is ​​obtained. The average particle size of the generated tungsten powder can reach less than tens of nanometers, and the particle size distribution of the powder is uniform.

Description

technical field [0001] The invention relates to an industrialized preparation method for rapidly preparing W / WC composite powder in which nanoscale W powder is used as a matrix and a small amount of WC powder is dispersedly distributed, and belongs to the technical field of refractory metals and powder metallurgy. Background technique [0002] Tungsten is widely used in industrial fields due to its high density, high melting point, low thermal expansion coefficient, excellent electrical and thermal conductivity, and good corrosion resistance. Composite materials based on tungsten or its carbides, such as: WC-Co cemented carbide, W-Ni-Fe high specific gravity alloy, W-Cu alloy, etc. have become indispensable and important materials in many high-tech fields, such as micro Electronic industry, fine chemical industry, surface technology, aerospace, etc. The properties of tungsten-based alloys are closely related to those of W powder. When the particle size of tungsten powder i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/20B22F1/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00B22F9/20B22F1/054
Inventor 宋晓艳刘兴伟侯超刘雪梅王海滨李昱嵘
Owner XIAMEN TUNGSTEN