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Method for preparing metallic matrix composite coating reinforced by alumina ceramics particles

A technology of alumina ceramics and composite materials, applied in metal material coating process, coating, heating inorganic powder coating and other directions, can solve the problems affecting the operation efficiency of thermal power plants, safe operation and power generation costs, and parts wear and ash removal. Technology, difficult to promote and use, etc., to achieve the effect of reducing the cost of coating preparation, high hardness and low price

Inactive Publication Date: 2009-11-18
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the serious wear problem of dry ash removal system components has always been the main obstacle to the wide application of dry ash removal technology in my country, and it is also one of the main problems affecting the operation efficiency, operation safety and power generation cost of thermal power plants
Cobalt-based tungsten carbide coatings are mostly prepared by supersonic flame spraying, but the preparation cost of this coating is relatively high, and it is difficult to popularize and use it in my country

Method used

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  • Method for preparing metallic matrix composite coating reinforced by alumina ceramics particles

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1, adopt 22%Al 2 o 3 +78% NiCrBSi mixed spray powder, plasma spray parameters are: current 440A; voltage 47V; primary gas (Ar) 47L / min; secondary gas (H 2 )3L / min; powder feeding speed 30g / min; spraying distance 80mm; spraying speed 90mm / s, to prepare Al 2 o 3P / NiCrBSi composite coating. Al 2 o 3P The erosion wear resistance rate of / NiCrBSi coating is 6.9×10 -3 mm 3 / g-7.2×10 -3 mm 3 / g; coating / substrate interface bonding strength is 30MPa-34MPa.

Embodiment 2

[0021] Embodiment 2, adopt 20% Al 2 o 3 +80% NiCrBSi mixed spray powder, plasma spray parameters are: current 440A; voltage 47V; primary gas (Ar) 47L / min; secondary gas (H 2 )3L / min; powder feeding speed 30g / min; spraying distance 80mm; spraying speed 90mm / s, to prepare Al 2 o 3P / NiCrBSi composite coating. Al 2 o 3P The erosion wear resistance rate of / NiCrBSi coating is 7.2×10 -3 mm 3 / g-7.5×10 -3 mm 3 / g; coating / substrate interface bonding strength is 31MPa-35MPa.

Embodiment 3

[0022] Embodiment 3, adopt 24% Al 2 o 3 +76% NiCrBSi mixed spray powder, plasma spray parameters are: current 440A; voltage 47V; primary gas (Ar) 47L / min; secondary gas (H 2 )3L / min; powder feeding speed 30g / min; spraying distance 80mm; spraying speed 90mm / s, to prepare Al 2 o 3P / NiCrBSi composite coating. Al 2 o 3P The erosion wear resistance rate of / NiCrBSi coating is 7.0×10 -3 mm 3 / g-7.4×10 -3 mm 3 / g; coating / substrate interface bonding strength is 25MPa-30MPa.

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Abstract

The invention relates to a method for preparing metallic matrix composite coating reinforced with alumina ceramics particles in the technical fields such as materials, electric power, metallurgy, machinery and the like, belonging to surface engineering techniques. The metallic matrix composite coating reinforced by alumina ceramics particles (AL2O3P / NiCrBSi) is prepared on the surface of the mild steel base material based on the characteristics of high wear and erosion resistance, low cost of the alumina materials, fine self-fluxing nature, wettability and plasma spraying technology of the NiCrBSi alloy, and the property of wearing and erosion resistance is improved. The technique process of preparing WCP / NiCrBSi composite material coating is as follows: coating design; sifting dusty spray; mixing the powder according to certain ratio; superficial treatment of base material; controlling plasma spraying parameter; and preparing WCP / NiCrBSi coating.

Description

technical field [0001] The invention relates to a method for preparing an alumina ceramic particle-reinforced metal matrix composite material coating in the technical fields of materials, electric power, metallurgy, machinery, etc., and belongs to surface engineering technology. Background technique [0002] Electric power industry is the pillar industry of national economy. Fly ash and slag produced by coal-fired boilers in thermal power plants account for about 1 / 5 of the coal consumption. The treatment of fly ash and slag has become an important production link of thermal power generation. There are two main methods of ash removal: one is to use a hydraulic ash removal system to clean and transport ash (referred to as water ash removal); the other is to use a pneumatic ash removal system to clean and transport ash (referred to as dry ash removal) . Because the dry ash removal system has the advantages of saving water resources, no pollution to the environment, and reusa...

Claims

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Application Information

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IPC IPC(8): C23C24/08C23C4/12C23C4/06C23C4/134
Inventor 孙大千宫文彪韩耀武王文权宣兆志任振安谷晓燕
Owner JILIN UNIV
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