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Plasma spraying high-temperature-erosion-resistant high-entropy amorphous powder and coating thereof, coating preparation method and application

A technology of amorphous powder and amorphous coating, which is applied in the direction of coating, metal material coating process, fusion spraying, etc., can solve the problems of low bonding strength, poor high temperature erosion resistance, low fracture toughness, etc., and achieve Excellent high temperature erosion and corrosion resistance, broad application prospects

Inactive Publication Date: 2020-01-17
HOHAI UNIV +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: in order to overcome the defects of the prior art, the present invention provides Plasma spraying high-temperature erosion-resistant high-entropy amorphous powder and its coating, coating preparation method and application, the high-entropy amorphous coating prepared by plasma spraying technology has a relatively high amorphous content (≥98%) and dimension Hardness (>900Hv), lower porosity (<1%), the coating can be widely used in harsh service environments such as high temperature erosion and corrosion of key components such as power plant boilers, petrochemical pipelines, and flue gas turbine blades

Method used

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  • Plasma spraying high-temperature-erosion-resistant high-entropy amorphous powder and coating thereof, coating preparation method and application
  • Plasma spraying high-temperature-erosion-resistant high-entropy amorphous powder and coating thereof, coating preparation method and application
  • Plasma spraying high-temperature-erosion-resistant high-entropy amorphous powder and coating thereof, coating preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0027] According to the atomic percentage of the powder composition: Fe 20%, Co 20%, Ni 20%, Cr 20%, B 10% and Si 10%, the ingredients are weighed. Put it into a magnesia crucible that is vacuumed and filled with high-purity argon, and is prepared into a high-entropy amorphous alloy powder by vacuum induction gas atomization. After screening, the particle size of the powder is 300-400 mesh. The steps of the high-entropy amorphous coating preparation method are as follows:

[0028] a) Workpiece pre-treatment: Use sandblasting equipment to select white corundum sand with a particle size of 36 mesh to perform sandblasting on the surface of the workpiece to be prepared. The sandblasting gas pressure is 0.6MPa. After sandblasting, the surface of the workpiece is placed in acetone solution and cleaned by ultrasonic waves. And be dried in the drying box that temperature is 50 ℃, standby;

[0029] b) Prepare high-entropy amorphous spray coating material: place the prepared high-entro...

Embodiment 2

[0033]According to the atomic percentage of the powder composition: Fe 20%, Co 20%, Ni 20%, Cr 20%, B 12% and Si 8%, the ingredients are weighed. Put it into a magnesia crucible that is vacuumed and filled with high-purity argon, and is prepared into a high-entropy amorphous alloy powder by vacuum induction gas atomization. After screening, the particle size of the powder is 300-400 mesh. The steps of the high-entropy amorphous coating preparation method are as follows:

[0034] a) Workpiece pre-treatment: Use sandblasting equipment to select white corundum sand with a particle size of 36 mesh to perform sandblasting on the surface of the workpiece to be prepared. The sandblasting gas pressure is 0.6MPa. After sandblasting, the surface of the workpiece is placed in acetone solution and cleaned by ultrasonic waves. And be dried in the drying box that temperature is 50 ℃, standby;

[0035] b) Prepare high-entropy amorphous spray coating material: place the prepared high-entropy...

Embodiment 3

[0039] According to the atomic percentage of the powder composition: Fe 20%, Co 20%, Ni 20%, Cr 20%, B 14% and Si 6%, the ingredients are weighed. Put it into a magnesia crucible that is vacuumed and filled with high-purity argon, and is prepared into a high-entropy amorphous alloy powder by vacuum induction gas atomization. After screening, the particle size of the powder is 300-400 mesh. The steps of the high-entropy amorphous coating preparation method are as follows:

[0040] a) Workpiece pre-treatment: Use sandblasting equipment to select white corundum sand with a particle size of 36 mesh to perform sandblasting on the surface of the workpiece to be prepared. The sandblasting gas pressure is 0.6MPa. After sandblasting, the surface of the workpiece is placed in acetone solution and cleaned by ultrasonic waves. And be dried in the drying box that temperature is 50 ℃, standby;

[0041] b) Prepare high-entropy amorphous spray coating material: place the prepared high-entrop...

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Abstract

The invention discloses plasma spraying high-temperature-erosion-resistant high-entropy amorphous powder and a coating thereof, a coating preparation method and application. The high-entropy amorphouspowder is prepared through a vacuum induction gas atomization method. The powder comprises, by atomic percent, 20% of Fe, 20% of Co, 20% of Ni, 20% of Cr, 10% -16% of B and 4% -10% of Si; the particle size of the powder obtained after screening is 300-400 meshes. The preparation method of the high-entropy amorphous coating comprises the steps that (a) a workpiece is pretreated; (B) a high-entropyamorphous powder material is prepared; and (c) the high-entropy amorphous coating is prepared through a plasma spraying technology. The amorphous content of the high-entropy amorphous coating is morethan or equal to 98%, the porosity is smaller than 1%, the bonding strength is more than 50MPa, the Vickers hardness is more than 900Hv, and the excellent high-temperature-erosion-resistant performance is achieved. The plasma spraying high-temperature-erosion-resistant high-entropy amorphous powder can be widely applied to high-temperature-erosion-resistant and corrosion-resistant protection of key components such as power plant boilers, petrochemical engineering pipelines and smoke turbine blades, and the service life of mechanical engineering equipment can be remarkably prolonged.

Description

technical field [0001] The invention belongs to the field of material surface engineering, and relates to a high-entropy high-entropy amorphous coating resistant to high-temperature erosion and corrosion protection for key components such as power plant boilers, petrochemical pipelines, and flue gas turbine blades. Crystal powder and its coating, coating preparation method and application. Background technique [0002] The phenomenon of erosion and wear widely exists in many industrial departments such as machinery, metallurgy, aerospace, energy, metallurgy and mining, petrochemical industry, construction, etc., accounting for about 8% of the total number of various types of wear and tear, and it causes great harm to industrial production, such as: Dust and sand in the air can reduce the service life of helicopter engines by 90%; the erosion of coal injection and slag discharge pipeline elbows in thermal power plants and thermal power plants is more than 50 times more seriou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/134C23C4/02C23C4/067C22C45/00B22F9/08
CPCB22F9/082B22F2009/0824B22F2009/0836C22C45/008C23C4/02C23C4/067C23C4/134
Inventor 程江波张显程葛云云张保森梁秀兵
Owner HOHAI UNIV
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