Preparation method of strengthened coating

A coating and coating technology, applied in the direction of coating, metal material coating process, etc., can solve the problems of unsatisfactory wear and corrosion resistance, poor compactness of composite steel pipe reinforced coating, etc., to achieve low cost and dense Excellent performance, strong wear and corrosion resistance

Inactive Publication Date: 2013-05-15
KING STRONG MATERIAL ENG LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When there are inclusions in the metal, the air bubbles are easy to concentrate on the inner surface of the casting, so the casting has high density and good mechanical properties, and it can also solve the segregation of the casting. The high temperature generated when the wave passes through the sample can remove volatile impurities and improve the purity of the product; ⑤It is easy to use a cheaper raw material to produce another high value-added product to achieve the economic purpose of low cost and considerable benefits, so the more It is more and more favored by the industry, but the reinforced coating density of the existing prepared composite steel pipe is not good, and the wear resistance and corrosion resistance are not ideal

Method used

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Examples

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Comparison scheme
Effect test

preparation example Construction

[0012] The preparation method of the reinforced coating that the present invention proposes comprises the following steps:

[0013] S1. Prepare a first self-fluxing alloy powder coating on the surface of the substrate, wherein the first self-fluxing alloy powder coating includes nickel-based alloy powder and / or iron-based alloy powder. Among them, the nickel-based alloy powder and the iron-based alloy powder are self-fluxing alloy powders with a preferential melting point of 850-1150°C. Preferably, the particle diameter of the nickel-based alloy powder and the iron-based alloy powder is 15-50 μm. The method for preparing the first self-fluxing alloy powder coating is not limited in the present invention, and methods commonly used by those skilled in the art can be used, such as the method of spraying dry powder, etc., and the first self-fluxing alloy powder coating of the present invention preferably includes The first binder, the nickel-based alloy powder and / or the iron-bas...

Embodiment 1

[0028] Weigh 150g of tungsten powder, 90g of titanium powder, and 300g of graphite powder, put them into a ball mill jar, add 2000g of steel balls, and use a rolling ball mill for ball milling and mixing. The ball mill speed is 50rpm, the charging coefficient is 0.7, and the ball milling time is 3h to obtain a mixed powder. Weigh 1080g of nickel-based self-fluxing alloy powder Ni60A and divide it into two parts, each part is 540g. Add the above mixed powder and two parts of nickel-based self-fluxing alloy powder with 30ml of organic binder polyvinyl alcohol solution (concentration: 2%), Stir and mix for 15 minutes to make a slurry. First, put a portion of Ni60A slurry under a centrifuge with a rotating speed of 120 rpm for coating. After drying, place the prepared tungsten-titanium-carbon mixed slurry under a centrifuge with the same rotating speed for coating. After drying, put another part of Ni60A slurry under the centrifuge at the same speed for coating, and after drying, p...

Embodiment 2

[0030] Weigh 100g of tungsten powder, 60g of titanium powder, and 200g of graphite powder, put them into a ball mill jar, add 1500g of steel balls, and use a rolling ball mill for ball mill mixing. The ball mill speed is 60rpm, the charging coefficient is 0.6, and the ball milling time is 4h to obtain a mixed powder. Weigh 20g of nickel-based self-fluxing alloy powder Ni60A720g and divide it into two parts, 360g each, add the above-mentioned mixed powder and two parts of nickel-based self-fluxing alloy powder with 25ml of organic binder rosin alcohol solution (concentration: 6%), stir Mix for 15 minutes to make a slurry. First, put a portion of Ni60A slurry under a centrifuge with a rotating speed of 100 rpm for coating. After drying, place the prepared tungsten-titanium-carbon mixed slurry under a centrifuge with the same rotating speed for coating. , after drying, put another part of Ni60A slurry under the centrifuge at the same speed for coating, and after drying, put SiO 2...

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Abstract

The invention discloses a preparation method of a strengthened coating. The preparation method comprises the following steps of: S1, preparing a first self-fluxing alloy powder coating on the surface of a substrate, wherein the first self-fluxing alloy powder coating comprises nickel-based alloy powder and / or iron-based alloy powder; S2, preparing a mixed powder coating on the surface of the first self-fluxing alloy powder coating obtained in the step S1, wherein the mixed powder coating comprises mixed powder, and the mixed powder comprises tungsten powder, titanium powder and graphite powder; S3, preparing a second self-fluxing alloy powder coating on the surface of the mixed powder coating obtained in the step S2, wherein the second self-fluxing alloy powder coating comprises nickel-based alloy powder and / or iron-based alloy powder; and S4, putting a product obtained in the step 3 in an induction field, centrifuging the product and preparing the strengthened coating on the surface of the substrate by adopting a self-propagating-centrifuge method under inductive heating. The strengthened coating prepared by using the preparation method is better in compactness, stronger in wear resistance and corrosion resistance and better in binding property between the coating and the substrate; and the preparation method is simple in process and low in cost and has a wide application prospect.

Description

technical field [0001] The invention relates to the field of composite steel pipe manufacturing, in particular to a method for preparing a strengthening coating. technical background [0002] At present, there are not many production methods for composite pipes, mainly including nesting method, centrifugal casting, bimetallic centrifugal casting, composite material welding, SHS-centrifugal method (self-propagating-centrifugal method), etc. The study found that the centrifugal force has a great influence on the combustion process of the self-propagating reaction, and the combustion process can be controlled by the centrifugal force. The SHS-centrifugal method can well solve the problem of interface bonding between the strengthening phase and the matrix alloy. Compared with other processes, it is characterized by : ①The process is short, the operation is simple, and it is convenient to manufacture bimetal or multi-layer metal castings such as barrels, sleeves, pipes, and rolle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10
Inventor 王刚罗骥郭志猛王振明屈彦杰吴清军张存广张福绪廖应峰谢时强
Owner KING STRONG MATERIAL ENG LTD
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