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A kind of preparation method of novel cu-nanometer wc composite material

A kind of composite material and nanotechnology, which is applied in the field of preparation of new Cu-nano WC composite materials, can solve the problems of high gas content, low density, low electrical conductivity, etc., and achieve the effects of low gas content, increased strength and high electrical conductivity

Active Publication Date: 2021-01-22
SHAANXI SIRUI ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem solved by the present invention is that the Cu-WC composite material prepared by the prior art has low density, high gas content, low electrical conductivity and cannot prepare a composite material with a WC content of less than 50%, which greatly limits the performance of the Cu-WC material. Application field

Method used

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  • A kind of preparation method of novel cu-nanometer wc composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: prepare CuWC4

[0028] Raw material selection copper powder (-200 mesh) purity ≥ 99.7%, WC (<500 nanometers) purity ≥ 99.0%, first mix copper powder and WC by weight Cu powder: WC powder = 75:25, and then use the weight ratio Mixing powder: steel ball = 100:100 for 3 hours; steel ball particle size 5mm, mixing machine speed 10 rpm;

[0029] The uniformly mixed mixed powder is loosely loaded into a graphite crucible, followed by vacuum sintering, when the vacuum degree reaches 5×10 -2 When it is below the pa level, heat it at 950°C for 2 hours to complete the sintering, and obtain a Cu-nano WC blank;

[0030] Proportion the Cu-nanometer WC billet and the oxygen-free copper block according to the weight ratio Cu:WC=96:4;

[0031] Put the prepared Cu-nanometer WC billet and oxygen-free copper block into the ceramic crucible, turn on the vacuum system of the vacuum induction melting equipment, when the vacuum degree reaches 3×10 -1 Gradient heating when pa ...

Embodiment 2

[0033] Embodiment 2: prepare CuWC6

[0034] Raw material selection copper powder (-200 mesh) purity ≥ 99.7%, WC (<500 nanometers) purity ≥ 99.0%, first mix copper powder and WC by weight Cu powder: WC powder = 90: 10, and then use the weight ratio Mixing powder: steel ball = 100:100 for 5 hours of powder mixing; the steel ball particle size is 12mm, and the speed of the powder mixing machine is 13 rpm;

[0035] The uniformly mixed mixed powder is loosely loaded into a graphite crucible, followed by vacuum sintering, when the vacuum degree reaches 5×10 -2 When it is below the pa level, heat it at 980°C for 2 hours to complete the sintering, and obtain a Cu-nanometer WC blank;

[0036] Proportion the Cu-nanometer WC billet and the oxygen-free copper block according to the weight ratio Cu:WC=94:6;

[0037] Put the prepared Cu-nanometer WC billet and oxygen-free copper block into the ceramic crucible, turn on the vacuum system of the vacuum induction melting equipment, when the ...

Embodiment 3

[0039] Embodiment 3: preparation CuWC8

[0040] Raw material selection copper powder (-200 mesh) purity ≥ 99.7%, WC (<500 nanometers) purity ≥ 99.0%, first mix copper powder and WC by weight Cu powder: WC powder = 80: 20, and then use the weight ratio Mixing powder: steel ball = 100:100 for 5 hours of powder mixing; the particle size of the steel ball is 16mm, and the speed of the powder mixing machine is 22 rpm;

[0041] The uniformly mixed mixed powder is loosely loaded into a graphite crucible, followed by vacuum sintering, when the vacuum degree reaches 5×10 -2 When it is below the pa level, heat it at 1000°C for 2 hours to complete the sintering, and obtain a Cu-nanometer WC blank;

[0042] Proportioning the Cu-nanometer WC billet and the oxygen-free copper block according to the weight ratio Cu:WC=92:8;

[0043] Put the prepared Cu-nanometer WC billet and oxygen-free copper block into the ceramic crucible, turn on the vacuum system of the vacuum induction melting equip...

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Abstract

The invention discloses a method for preparing a novel Cu-nano-WC composite material, which belongs to the technical field of Cu-WC composite material preparation. The invention utilizes a vacuum induction smelting method to uniformly mix copper powder and WC in a certain proportion, and then loosen For sintering, the loose-packed and sintered Cu-nanometer WC billet and the oxygen-free copper block are mixed according to the weight ratio Cu:WC=99:1 to 50:50 for vacuum induction melting, and finally cooled. The present invention utilizes vacuum induction melting Cu-WC material is prepared by the method, so the gas content is low, and it is suitable for the preparation of Cu-WC composite material with WC content ≤ 50%, and because it is a cast structure, it has a density close to 100%, and the raw material is nano-scale High-quality WC powder can greatly improve the strength of this material through nano-strengthening.

Description

technical field [0001] The invention relates to the technical field of alloy material preparation, in particular to a method for preparing a novel Cu-nanometer WC composite material. Background technique [0002] Cu-WC materials are limited by the difference in properties such as the melting point of Cu and WC. At present, powder metallurgy is widely used in the industrial field. The Cu-WC composite material prepared by powder metallurgy has low density and gas High content, low electrical conductivity and the inability to prepare composite materials with WC content less than 50%, which greatly limits the application field of Cu-WC materials. [0003] The preparation process of prior art is: [0004] Powder mixing: Mix WC powder and powder mixed with a small amount of Cu powder and other additives through powder mixing equipment; [0005] Pressing: pressing the uniformly mixed powder through pressing equipment to obtain a green body with certain bonding strength and porosi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/00C22C1/03C22C32/00B22F3/10C22C29/08B22D27/04
CPCC22C9/00C22C1/03C22C32/0052B22F3/1007C22C29/08C22C29/067B22D27/04C22C1/1005B22F2998/10C22C1/051C22C1/1084C22C1/1047
Inventor 张石松刘凯王小军李鹏杨斌王文斌师晓云赵俊李刚
Owner SHAANXI SIRUI ADVANCED MATERIALS CO LTD
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