A preparation method of high-density wc-wb-co spherical powder hard surface material

A spherical powder, wc-wb-co technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems that affect the wear resistance and corrosion resistance of the coating, the roughness of the powder surface, and the low bulk density of the powder. , to achieve the effect of improved corrosion resistance, better corrosion resistance, and improved sphericity

Active Publication Date: 2020-07-24
株洲江钨博大硬面材料有限公司
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The microscopic appearance of the tungsten boride thermal spraying powder prepared by this method is hollow spherical, the surface roughness of the powder is relatively large, and the bulk density of the powder is relatively low; in addition, because the powder prepared by this method is hollow spherical, thermal After spraying, the porosity of the coating will be high, which will affect the wear resistance and corrosion resistance of the coating.

Method used

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  • A preparation method of high-density wc-wb-co spherical powder hard surface material
  • A preparation method of high-density wc-wb-co spherical powder hard surface material
  • A preparation method of high-density wc-wb-co spherical powder hard surface material

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preparation example Construction

[0042]A kind of high-density WC-WB-Co spherical powder hard surface material of the present invention, its formula proportion is counted as: WB powder 15%-38%, Co powder 8%-12%, PEG binder 1.0%- 4.0%, WC powder 50%-75%. A kind of preparation method of high density WC-WB-Co spherical powder hard surface material of the present invention comprises the following process steps:

[0043] (1) Ingredients: ingredients are made according to mass percentage, wherein the addition ratio of WC powder is 50%-75%, the addition ratio of WB powder is 15%-38%, and the addition ratio of metal Co powder is 8%-12%. PEG is a binder, and its addition amount is 1.0%-4.0% of the total mass;

[0044] (2) Wet milling: Put the prepared materials in the ball milling tank, use deionized water or edible alcohol as the ball milling medium, control the mass ratio of the ball to material within the range of 2:1-5:1, and the ball milling time is 20h- 72h;

[0045] (3) Spray drying: the wet-milled WC-WB-Co s...

Embodiment 1

[0057] Example 1, figure 1 It is the SEM electron microscope image of 60WC-30WB-10Co spherical powder, taking the addition ratio of WC powder as 60%, the addition ratio of WB powder as 30%, and the addition ratio of metal Co powder as 10% as an example:

[0058] (1) Batching: batching is carried out according to mass percentage, wherein the addition ratio of WC powder is 60%, the addition ratio of WB powder is 30%, the addition ratio of metal Co powder is 10%, selects PEG as binder, and its addition amount 2.0% of the total mass;

[0059] (2) Wet milling: place the prepared materials in a ball milling tank, use deionized water as the ball milling medium, the mass ratio of balls to materials is 4:1, and the ball milling time is 48 hours;

[0060] (3) Spray drying: the wet-milled slurry is spray-dried by a pressure spray drying tower to prepare a standby mixed material;

[0061] (4) Compression: place the spray-dried powder in a powder press, and press it into a block-shaped e...

Embodiment 2

[0067] Example 2, figure 2 It is the SEM electron microscope image of 50WC-38WB-12Co spherical powder, taking the addition ratio of WC powder as 50%, the addition ratio of WB powder as 38%, and the addition ratio of metal Co powder as 12% as an example:

[0068] (1) Batching: batching is carried out according to mass percentage, wherein the addition ratio of WC powder is 50%, the addition ratio of WB powder is 38%, the addition ratio of metal Co powder is 12%, selects PEG as binder, its addition amount 2.2% of the total mass;

[0069] (2) Wet milling: place the prepared materials in a ball milling tank, use deionized water as the ball milling medium, the mass ratio of balls to materials is 3.5:1, and the ball milling time is 60h;

[0070] (3) Spray drying: the wet-milled slurry is spray-dried by a pressure spray drying tower to prepare a standby mixed material;

[0071] (4) Compression: place the spray-dried powder in a powder press, and press it into a block-shaped embryo ...

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Abstract

A high-density WC-WB-Co spherical powder hard surface material of the present invention and its preparation method, its formula ratio is calculated by mass percentage: WC powder 50%-75%; WB powder 15%-38%; Co powder 8% %‑12%; PEG binder 1.0%‑4.0%. Beneficial effects: WB is introduced into the material system design, because WB will react with metal phase Co to form ternary phase CoWB during the powder sintering process, and CoWB has higher microhardness and better corrosion resistance than WC, Therefore, the addition of WB can significantly improve the wear resistance and corrosion resistance of the material, increase the microhardness HV0. The powder is rapidly heated and melted, and the melted powder particles are solidified into a spherical shape in a very short time under the action of surface tension, which can greatly improve the sphericity and solidity of a single powder, and make the bulk density of the final powder product reach 7.5g / cm3 or more , The powder flow rate is less than 10s / 50g, and the porosity of the coating is less than 0.5%.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to a method for preparing a high-density WC-WB-Co spherical powder hard surface material. Background technique [0002] In recent years, with the rapid advancement of science and technology and the continuous improvement of modern industrial technology, modern machinery and equipment have increasingly stringent requirements on the surface properties of important parts. The surface wear and corrosion of the workpiece has always been an important factor restricting the life of modern machinery and equipment, especially under harsh conditions such as high temperature, high pressure, heavy load and corrosion, the entire set of equipment often fails due to the wear and corrosion of the workpiece surface. [0003] The hard surface material is coated on the surface of the workpiece by supersonic flame spraying technology, plasma surfacing technology, laser cladding technology and pla...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C29/02C22C1/05C22C1/10B22F1/00B22F9/04
CPCC22C1/051C22C29/005C22C29/02B22F9/04B22F1/065
Inventor 刘宝刚余晓坤陈彪马遥
Owner 株洲江钨博大硬面材料有限公司
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