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Method fr preparing electric arc spraying fiber material containing core of nano material

A nano-material and arc spraying technology, which is applied in arc spraying, welding/cutting media/materials, manufacturing tools, etc., can solve problems such as tube explosion, affecting thermal efficiency, and reducing tube wall thickness, achieving high coating bonding strength, Wide application prospects and the effect of improving anti-oxidation performance

Inactive Publication Date: 2005-01-12
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Due to high-temperature erosion and wear of fly ash and high-temperature corrosion of flue gas, the boiler pipes of coal-fired power plants have reduced the wall thickness of the "four pipes" (water wall pipes, superheater pipes, reheater pipes, and economizer pipes). Small, a pipe burst accident occurred, causing huge losses to the power plant
Traditional methods, such as adding welding angle iron, anti-wear tile protection or directly replacing the pipe, not only seriously affect the thermal efficiency, but also uneconomical, and the effect of anti-wear and anti-corrosion is not good
Spraying common drug core wire, the effect is not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The sprayed coating formed by the supersonic arc spraying of the core wire made according to the above specifications on the steel substrate workpiece has the following characteristic effects:

[0026] 1. The weight ratio of drug core powder to the forming wire is 38%.

[0027] 2. The bonding strength is above 48MPa.

[0028] 3. HRC is greater than 55.

[0029] 4. With high hardness and good wear resistance, it is mainly suitable for the "four tubes" of coal-fired power plant boilers to resist high temperature erosion and wear.

Embodiment 2

[0032] The sprayed coating formed by the supersonic arc spraying of the core wire made according to the above specifications on the steel substrate workpiece has the following characteristic effects:

[0033] 1. The weight ratio of drug core powder to forming wire is 40%.

[0034] 2. The bonding strength is above 50MPa.

[0035] 3. HRC is greater than 45.

[0036] 4. High-temperature corrosion resistance and high-temperature oxidation resistance are strong, and it is mainly suitable for the "four tubes" of coal-fired power plant boilers to prevent high-temperature corrosion and oxidation.

Embodiment 3

[0039] The sprayed coating formed by the supersonic arc spraying of the core wire made according to the above specifications on the steel substrate workpiece has the following characteristic effects:

[0040] 1. The weight ratio of drug core powder to the forming wire is 42%.

[0041] 2. The bonding strength is above 50MPa.

[0042] 3. HRC is greater than 52.

[0043] 4. It has high hardness, certain wear resistance, high temperature corrosion resistance and high temperature oxidation resistance. It is mainly suitable for anti-wear, corrosion and oxidation of the "four tubes" of coal-fired power plant boilers.

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Abstract

An arc-spraying wire with the core containing nano material features that its core is a composite powder containing nano material and its jacket layer is chosen from carbon steel band, chromium steel band, stainless steel band, nickel band and aluminium band. Its sprayed layer has high adhesion and resistance to abrasion, crossion and oxidization.

Description

Technical field [0001] The invention relates to the processing or treatment of wires, in particular to a method for preparing electric arc spraying wires containing nanomaterial drug cores. Background technique [0002] Due to high-temperature erosion and wear of fly ash and high-temperature corrosion of flue gas, the boiler pipes of coal-fired power plants have reduced the wall thickness of the "four pipes" (water wall pipes, superheater pipes, reheater pipes, and economizer pipes). Small, a pipe burst accident occurred, causing huge losses to the power plant. Traditional methods, such as adding welding angle iron, anti-wear tile protection or directly replacing the pipe, not only seriously affect the thermal efficiency, but also uneconomical, and the anti-wear and anti-corrosion effect is not good. Spraying common drug core wire material, the effect is also unsatisfactory. Contents of the invention [0003] The purpose of the present invention is to provide a method fo...

Claims

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Application Information

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IPC IPC(8): B05B5/06B23K35/22B23K35/40
Inventor 刘少光温黎张升才李志章
Owner ZHEJIANG UNIV
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