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High-speed electric-arc-spraying liquid metal ceramic coating and preparation method thereof

An arc spraying and liquid metal technology, applied in metal material coating process, coating, melting spraying and other directions, can solve the problems of high cost, unstable performance of new coatings, complex process performance, etc., and achieve low cost and high performance. Good hardness and deposition efficiency

Active Publication Date: 2017-01-04
郑州华电能源科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, to provide a high-speed arc spraying liquid cermet coating and its preparation method with the characteristics of high spraying efficiency, good deposition efficiency, high deposition quality and good arc stability. Solve the technical problems of high cost, unstable performance of new coatings and complicated process performance in the existing technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0021] A preparation method for high-velocity electric arc spraying liquid cermet coating, comprising the following preparation steps:

[0022] 1) Preparation of tubular powder core wire material: Mix ferroboron, ferrosilicon, nickel powder, aluminum powder, chromium powder, graphite and arc stabilizer evenly, and then wrap the mixture with a steel belt, in order to be able to coat well The powder core wire material is stretched evenly, the mixture and the steel strip are covered by a wire wrapping machine, and then the steel strip covered with the mixture is closed, and the closed steel strip is subjected to a wire drawing die diameter reduction treatment through a wire drawing machine to obtain Tubular powder core wire; in order to increase the hardness and electrical conductivity of the powder core wire, the steel strip is H08A low-carbon steel strip. In order to melt the tubular powder core wire quickly and spray evenly, the tubular powder core wire The diameter is 1-4mm. ...

Embodiment 1

[0025] A high-speed electric arc spraying liquid cermet coating is prepared from the following raw materials in parts by weight: 64 parts of ferroboron; 4 parts of ferrosilicon; 2 parts of nickel powder; 3 parts of aluminum powder; 5 parts of graphite; 10 parts of chromium powder 12 parts of arc stabilizing agent; ferroboron, ferrosilicon, nickel powder, aluminum powder, chromium powder and graphite mesh are all 1200 orders, wherein the content of boron in ferroboron is 15-25%, and the content of silicon in ferrosilicon is 40-50%.

[0026] A preparation method for high-velocity electric arc spraying liquid cermet coating, comprising the following preparation steps:

[0027] 1) Preparation of tubular powder core wire material: Mix ferroboron, ferrosilicon, nickel powder, aluminum powder, chromium powder, graphite and arc stabilizer evenly, and then wrap the mixture with H08A low carbon steel belt through a wire wrapping machine , closing, the closed steel strip is subjected to...

Embodiment 2

[0031] A high-speed electric arc spraying liquid cermet coating is prepared from the following raw materials in parts by weight: 80 parts of ferroboron; 3 parts of ferrosilicon; 5 parts of nickel powder; 4 parts of aluminum powder; 10 parts of graphite; 7 parts of chromium powder 10 parts of arc stabilizing agent; The preparation method of the coating is the same as in Example 1.

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Abstract

The invention discloses a high-speed electric-arc-spraying liquid metal ceramic coating and a preparation method thereof. The liquid metal ceramic coating is prepared from the following raw materials in parts by weight: 60-80 parts of boron iron, 3-6 parts of silicon iron, 2-5 parts of buckle powder, 3-5 parts of aluminium powder, 5-20 parts of graphite, 5-10 parts of chromium powder and 5-15 parts of an arc stabilizing agent. The liquid metal ceramic coating prepared by mixing tubular powder cores is high in amorphous content (more than or equal to 85%) and hardness (HV0.1 is more than or equal to 10000), wear resistance, corrosion resistance and the like; and compared with the prior art, the liquid metal ceramic coating has the characteristics of low cost, high spraying efficiency, good deposition efficiency, high deposition quality, good arc stability and the like.

Description

technical field [0001] The invention belongs to the field of high-speed electric arc spraying, in particular to a high-speed electric arc spraying liquid metal ceramic coating for coal-fired boiler pipes and a preparation method thereof. Background technique [0002] The high-speed arc spraying technology is based on the principle of gas dynamics, based on the traditional arc spraying technology, using a new type of Laval nozzle to design and improve the spray gun. It improves the stability of the arc, increases the speed of the sprayed particles, reduces the flight time of the atomized particles in the air, reduces the degree of oxidation of the coating, and then improves the quality of the coating. Compared with traditional arc spraying technology, high-speed arc spraying mainly lies in increasing the pressure and flow rate of atomizing gas. At present, the improvement of the spraying process mainly depends on the optimization of the spraying materials. Although the arc s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/06C23C4/131
CPCC23C4/06
Inventor 卞海兵周民刘春山王海涛
Owner 郑州华电能源科技有限公司
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