Nickel-based powder core wire and preparation and application of coating

A powder core wire, nickel-based technology, applied in metal material coating process, coating, lighting and heating equipment, etc., can solve the problem of complex preparation of spraying raw material powder, unsuitable for large-area on-site construction, and complex spraying process equipment. and other problems, to achieve the effect of improving service stability, high hardness and good wear resistance

Active Publication Date: 2014-07-16
唐山宝航机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Plasma spraying, supersonic flame spraying and other spraying process equipment are complex and costly, not suitable for in-situ large-scale on-site construction, and the preparation of spraying raw material powder is complicated

Method used

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  • Nickel-based powder core wire and preparation and application of coating
  • Nickel-based powder core wire and preparation and application of coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] According to the mass percentage of powder core wire material: 25% pure metal chromium powder, 2% pure metal tungsten, 27% nickel boron powder, and nickel as the balance. The filling rate is 32%, and the rolled powder core wire. Spraying parameters used for coating preparation: voltage 28-30V, current 160-180A, spraying distance 190mm, compressed air pressure 0.5-0.6MPa.

Embodiment 2

[0028] According to the mass percentage of powder core wire material: 25% pure metal chromium powder, 2% pure metal tungsten, 27% nickel boron powder, and nickel as the balance. The filling rate is 32%, and the rolled powder core wire. Spraying parameters used for coating preparation: voltage 28-30V, current 160-180A, spraying distance 200mm, compressed air pressure 0.5-0.6MPa.

Embodiment 3

[0030] According to the mass percentage of powder core wire material: 25% pure metal chromium powder, 2% pure metal tungsten, 27% nickel boron powder, and nickel as the balance. The filling rate is 32%, and the rolled powder core wire. Spraying parameters used for coating preparation: voltage 28-30V, current 160-180A, spraying distance 210mm, compressed air pressure 0.5-0.6MPa.

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Abstract

The invention relates to a nickel-based powder core wire and preparation and application of a coating and belongs to the thermal spraying field of material processing engineering. The chemical core comprises the following components in percentage by weight: 20-35% of pure metal chromium powder, 1-4% of pure metal tungsten, 1-30% of nickel boron powder and the balance of nickel. The strip for the outer skin of the powder core wire is 80Ni-20Cr strip. The filling rate of the powder core wire is 32%. When a tungsten-nickel-containing coating is prepared by an electric arc spraying method, a base body is pre-treated first and the spraying process is carried out under following conditions: the voltage is 28-34V, the current is 160-220A, the spraying distance is 190-210mm and the pressure of the compressed air is 0.5-0.6MPa. According to the tungsten-containing corrosion-resistant coating obtained by the invention, the high-temperature corrosion resistance of the coating is increased, and the service stability of a water cooling wall pipe and an over-heater pipe in a waste resourceful WTE (Waste-To-Energy) garbage incinerator is improved.

Description

technical field [0001] The invention belongs to the field of thermal spraying in material processing engineering, and relates to a preparation method and application of a powder core wire material and a coating. The invention is mainly used in industrial fields such as heat resistance and corrosion. Background technique [0002] With the large amount of waste generated and the requirements for environmental protection getting higher and higher, waste-to-energy (WTE) waste incineration technology has become the main development trend in the treatment of solid waste. [0003] The main corrosion forms of corrosive parts such as superheater and water wall in WTE waste incinerator are: molten salt corrosion and active oxidation. When the temperature reaches above 450 °C, the oxidation of metal chloride and HCl will produce highly active Cl 2 , it is easy to diffuse into the surface oxide film, and react with Fe or other metal elements at the interface of oxide film / metal matrix ...

Claims

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Application Information

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IPC IPC(8): C23C4/06C23C4/12F23G5/48C23C4/131
Inventor 周正贺定勇王旭王曾洁蒋建敏王智慧王国红赵秋颖
Owner 唐山宝航机械制造有限公司
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