Preparation method of an erosion-resistant and wear-resistant iron-based composite coating

A composite coating and erosion-resistant technology, which is applied in coatings, metal material coating processes, manufacturing tools, etc., can solve problems such as poor bonding between coatings and substrates, easy failure of substrates, and easy peeling, etc., to achieve Good protective effect, good coating density and oxidation resistance, and the effect of increasing deformation resistance

Active Publication Date: 2018-08-17
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the main problem faced by thermal spraying technology is that the coating is poorly bonded to the substrate, which is basically mechanical fitting, and the bonding force is poor. Substrates more prone to failure in harsh operating environments

Method used

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  • Preparation method of an erosion-resistant and wear-resistant iron-based composite coating
  • Preparation method of an erosion-resistant and wear-resistant iron-based composite coating
  • Preparation method of an erosion-resistant and wear-resistant iron-based composite coating

Examples

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Effect test

Embodiment 1

[0026] A preparation method of an erosion-resistant and wear-resistant iron-based composite coating, comprising the following steps:

[0027] 1. Substrate surface treatment: select 20 steel as the substrate, and its size specification is 100mm×100mm×10mm; successively use 200#, 500# and 800# sandpaper to polish off the oxide layer and rust stains on the surface of the substrate, and then use Clean the surface with acetone to remove dust and dry it;

[0028] 2. Grid division: use a cutting machine to cut a V-shaped groove every 20mm on the surface of the substrate, divide the surface of the substrate into 25 small squares of 20×20mm, the depth of the groove is 0.5-1mm, and the width of the notch is 0.5-0.8 mm;

[0029] 3. Prepare the mesh cladding layer: Use non-melting tungsten argon arc welding equipment to clad the welding wire in the V-shaped groove, the melting width is 1-1.5mm, and the cladding height is 1-2mm to prepare the mesh cladding layer; The welding parameters a...

Embodiment 2

[0033] A preparation method of an erosion-resistant and wear-resistant iron-based composite coating, comprising the following steps:

[0034] 1. Substrate surface treatment: select 20 steel as the substrate, and its size specification is 100mm×100mm×10mm; successively use 200#, 500# and 800# sandpaper to polish off the oxide layer and rust stains on the surface of the substrate, and then use Clean the surface with acetone to remove dust and dry it;

[0035] 2. Grid division: use a cutting machine to cut a V-shaped groove every 20mm on the surface of the substrate, divide the surface of the substrate into 25 small squares of 20×20mm, the depth of the groove is 0.5-1mm, and the width of the notch is 0.5-0.8 mm;

[0036] 3. Prepare the mesh cladding layer: Use non-melting tungsten argon arc welding equipment to clad the welding wire in the V-shaped groove, the melting width is 1-1.5mm, and the cladding height is 1-2mm to prepare the mesh cladding layer; The welding parameters a...

Embodiment 3

[0040] A preparation method of an erosion-resistant and wear-resistant iron-based composite coating, comprising the following steps:

[0041] 1. Substrate surface treatment: select 20 steel as the substrate, and its size specification is 100mm×100mm×10mm; successively use 200#, 500# and 800# sandpaper to polish off the oxide layer and rust stains on the surface of the substrate, and then use Clean the surface with acetone to remove dust and dry it;

[0042] 2. Grid division: use a cutting machine to cut a V-shaped groove every 20mm on the surface of the substrate, divide the surface of the substrate into 25 small squares of 20×20mm, the depth of the groove is 0.5-1mm, and the width of the notch is 0.5-0.8 mm;

[0043] 3. Prepare the mesh cladding layer: Use non-melting tungsten argon arc welding equipment to clad the welding wire in the V-shaped groove, the melting width is 1-1.5mm, and the cladding height is 1-2mm to prepare the mesh cladding layer; The welding parameters a...

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Abstract

The invention discloses a preparation method of an erosive wear resistant iron-based composite coating. The method is characterized in that a non-melting argon tungsten-arc welding device and a supersonic arc spray painting device are utilized; the erosive wear resistant iron-based composite coating is prepared on the surface of a base material by first treatment of the surface of the base material, dividing of grids, preparing of a net-shaped cladding layer, secondary treatment of the surface of the base material, preparation of the composite coating, and other technological steps. The composite coating is high in capacity of combining with the base material, is high in density and oxidation resistance, and can bear high impact load, so that the base material can be protected; the composite coating can be used in severe environments such as high temperature environment or hot corrosion environment, and thus the service life of the base material can be prolonged.

Description

technical field [0001] The invention belongs to the field of material surface coating preparation and protection, in particular to a preparation method of an erosion-resistant and wear-resistant iron-based composite coating. Background technique [0002] A major problem of boiler pipes in the electric power industry is high-temperature corrosion and wear, because boiler pipes often work in high-temperature, high-pressure corrosion environments, resulting in thinning of boiler pipes, which threatens the safety and stability of power plants to a large extent, and also causes Big loss. Among the accidents caused by all power stations, boiler accidents accounted for 56% of all power generation accidents. The heating surface pipes of boilers include four pipes including superheater pipes, water wall pipes, economizer pipes, and reheater pipes. Blasting accidents due to pipe thickness reduction accounted for about 64.2% of the total boiler accidents. In order to reduce losses, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/131C23C4/06B23K9/04B23K9/167
CPCB23K9/044B23K9/167C23C4/06
Inventor 梁天权李玉杰敖润蔺宇航梁艳芬李伟洲曾建民
Owner GUANGXI UNIV
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