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High entropy alloy coating as well as preparation method and application thereof

A high-entropy alloy and coating technology, which is applied in the direction of metal material coating technology and coating, can solve the problems of restricting the development of traditional alloy systems and actual production applications, and the deterioration of alloy performance, so as to improve the high-temperature oxidation resistance and improve Wear resistance, effect of improving cladding quality

Inactive Publication Date: 2017-10-27
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Too many components in traditional alloys tend to form complex intermetallic compounds and other complex phase structures, which often lead to deterioration of alloy properties and limit the development and practical production application of traditional alloy systems

Method used

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  • High entropy alloy coating as well as preparation method and application thereof
  • High entropy alloy coating as well as preparation method and application thereof
  • High entropy alloy coating as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A FeCoCrNiSiAl 0.5 Ti 0.2 The preparation process of high-entropy alloy coating is as follows:

[0032] (1) Optional Fe, Co, Cr, Ni, Si, Al, Ti powder with a particle size of 2-30μm and a purity of not less than 99.9%, according to the molar ratio Fe:Co:Cr:Ni:Si:Al:Ti =1:1:1:1:1:0.5:0.2 Weigh and mix, put the mixed powder into a ball mill, and ball mill for 5 hours under the protection of high-purity argon and mix well.

[0033] (2) Select 45# steel base material and carry out surface pretreatment, cut the size by wire cutting method, size 50mm×40mm×8mm (length×width×thickness), polish with sandpaper to remove the oxide film on the surface, clean it with alcohol and bake it dry.

[0034] (3) Mix the mixed powder of each element with the ethanol solution of shellac resin (the volume ratio of shellac resin to ethanol is 1:3) to form a paste and evenly coat it on the surface of the hot work die steel to form a layer of preset powder with a thickness 400μm, dried in a drying box...

Embodiment 2

[0040] A FeCoCrNiSiAlTi 0.5 The preparation process of high-entropy alloy coating is as follows:

[0041] (1) Optional Fe, Co, Cr, Ni, Si, Al, Ti powder with a particle size of 2-30μm and a purity of not less than 99.9%, according to the molar ratio Fe:Co:Cr:Ni:Si:Al:Ti =1:1:1:1:1:1:0.5 Weigh and mix, put the mixed powder into a ball mill, ball mill for 8 hours under the protection of high-purity argon, and mix well.

[0042] (2) Select 45# steel base material and carry out surface pretreatment, cut the size by wire cutting method, size 50mm×40mm×8mm (length×width×thickness), polish with sandpaper to remove the oxide film on the surface, clean it with alcohol and bake it dry.

[0043] (3) Mix the mixed powder with the shellac resin ethanol solution (the volume ratio of shellac resin to ethanol is 1:3) and adjust it into a paste and evenly coat it on the surface of the hot work die steel to form a layer of preset powder with a thickness of 400μm , Drying in the drying box;

[0044] (...

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Abstract

The invention discloses a high entropy alloy coating as well as a preparation method and application thereof. The coating is prepared from Fe, Co, Cr, Ni, Si, Al and Ti according to the mole ratio of 1 to 1 to 1 to 1 to 1 to (0.5 to 1.5) to (0 to 1). The preparation method comprises the following steps: feeding all element powder into a ball mill according to the mole ratio, carrying out ball milling for 5 to 10 hours under the protection of high-purity argon and uniformly mixing; blending uniformly-mixed element powder into a pasty shape by a binding agent, then uniformly coating the surface of a substrate with a pasty material, and drying; putting the substrate with preset powder on a laser equipment worktable, implementing a cladding technology, and forming the high entropy alloy coating on the surface of the substrate. The high entropy alloy coating prepared by the preparation method disclosed by the invention has solid solution tissues with a body-centered cubic (BCC) phase structure and has the advantages of high hardness (the hardness is about 650 to 950HV0.2) and good properties of wear resistance, heat resistance and corrosion resistance.

Description

Technical field [0001] The invention belongs to the field of surface modification of metal materials, and specifically relates to a metal alloy coating, in particular to a high-entropy alloy coating and a preparation method and application thereof. Background technique [0002] Traditional metal alloys are generally single or binary alloys, that is, one or two elements are used as the main components, and other elements are added to improve the structure and properties of the material, such as steel, aluminum alloy, titanium alloy, magnesium alloy, Copper alloy, etc. Too many components in traditional alloys tend to form complex intermetallic compounds and other complex phase structures, which often lead to the deterioration of alloy properties and limit the development and practical production applications of traditional alloy systems. [0003] High-entropy alloy is a new type of alloy. It was proposed by Taiwanese scientist Ye Junwei and other researchers in 2004. The high-entro...

Claims

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Application Information

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IPC IPC(8): C23C24/10C22C30/00
CPCC23C24/103C22C30/00
Inventor 刘英李卫
Owner JINAN UNIVERSITY
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