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Preparation method of in-situ synthesis low-pressure cold spraying CuNiCoFeCrAl2.8 high-entropy alloy coating

A high-entropy alloy and in-situ synthesis technology, which is applied in the coating process of metal materials, coating, heating inorganic powder coating, etc., can solve the problems of affecting the quality and service life of the coating, and the decline of the mechanical properties of the coating.

Active Publication Date: 2019-10-18
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Factors such as porosity, oxide impurities, matrix oxidation, and thermal deformation of the matrix will cause the mechanical properties of the coating to decline, affecting the quality and service life of the coating

Method used

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  • Preparation method of in-situ synthesis low-pressure cold spraying CuNiCoFeCrAl2.8 high-entropy alloy coating
  • Preparation method of in-situ synthesis low-pressure cold spraying CuNiCoFeCrAl2.8 high-entropy alloy coating
  • Preparation method of in-situ synthesis low-pressure cold spraying CuNiCoFeCrAl2.8 high-entropy alloy coating

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In-situ synthesis of low pressure cold spray CuNiCoFeCrAl in this example 2.8 A method for preparing a high-entropy alloy coating, the method comprising:

[0030] S1, Cu powder, Ni powder, Co powder, Fe powder, Cr powder and Al powder are mechanically stirred and mixed for 6.8h, and mixed uniformly to obtain a powder for cold spray; the powder for cold spray consists of the following mass fraction Raw materials: 18% Cu powder, 16% Ni powder, 16% Co powder, 15% Fe powder, 14% Cr powder, and the balance is Al powder; The powder of spherical particles; the Ni powder is a powder of irregular shape particles prepared by electrolysis; the Cr powder is a powder of irregular polygon particles prepared by crushing method; The Co powder is a powder whose appearance is an irregular particle prepared by an electrolytic method; the Fe powder is a powder whose appearance is an irregular particle prepared by an electrolytic method; the Cu powder is prepared by an electrolytic method ...

Embodiment 2

[0038] In-situ synthesis of low pressure cold spray CuNiCoFeCrAl in this example 2.8 A method for preparing a high-entropy alloy coating, the method comprising:

[0039] S1, Cu powder, Ni powder, Co powder, Fe powder, Cr powder and Al powder are mechanically stirred and mixed for 6.5h, and mixed uniformly to obtain a powder for cold spray; the powder for cold spray consists of the following mass fraction Raw materials: 15% Cu powder, 13% Ni powder, 13% Co powder, 17% Fe powder, 16% Cr powder, and the balance is Al powder; The powder of spherical particles; the Ni powder is a powder of irregular shape particles prepared by electrolysis; the Cr powder is a powder of irregular polygon particles prepared by crushing method; The Co powder is a powder whose appearance is an irregular particle prepared by an electrolytic method; the Fe powder is a powder whose appearance is an irregular particle prepared by an electrolytic method; the Cu powder is prepared by an electrolytic method ...

Embodiment 3

[0044] In-situ synthesis of low pressure cold spray CuNiCoFeCrAl in this example 2.8 A method for preparing a high-entropy alloy coating, the method comprising:

[0045] S1, Cu powder, Ni powder, Co powder, Fe powder, Cr powder and Al powder are mechanically stirred and mixed for 7 hours, and mixed uniformly to obtain a powder for cold spray; the powder for cold spray is composed of the following mass fraction of raw materials Made: 20% of Cu powder, 18% of Ni powder, 18% of Co powder, 12% of Fe powder, 11% of Cr powder, and the balance is Al powder; the Al powder is prepared by atomization method and its appearance is spherical The powder of particles; the Ni powder is a powder whose appearance is an irregular particle prepared by an electrolytic method; the Cr powder is a powder whose appearance is an irregular polygonal particle prepared by a crushing method; the Co The powder is a powder with irregular shape particles prepared by electrolysis; the Fe powder is a powder wi...

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Abstract

The invention provides a preparation method of an in-situ synthesis low-pressure cold spraying CuNiCoFeCrAl2.8 high-entropy alloy coating. The method comprises the following steps that Cu powder, Ni powder, Co powder, Fe powder, Cr powder and Al powder are uniformly mixed to obtain powder for cold spraying, and then low-pressure cold spraying is carried out on the surface of a metal matrix so as to obtain a mixed powder coating, and then induction remelting in-situ synthesis is carried out to obtain the CuNiCoFeCrAl2.8 high-entropy alloy coating. According to the method, the low-pressure coldspraying technology is used, the cold spraying powder is subjected to low-pressure cold spraying on the matrix, the induction remelting in-situ synthesis is carried out, the CuNiCoFeCrAl2.8 high-entropy alloy coating is obtained, an alloying reaction is sufficient, the microstructure of a mixed powder coating forms a high-entropy alloy structure with a body-centered cubic structure from a pure metal in situ, the high-entropy alloy coating is formed, the structure is compact, the porosity is low, the high-entropy alloy structure is stable in structure, few in impurities, excellent in mechanicalperformance, high in strength and high in hardness, and good in wear resistance and corrosion resistance; and the thickness of the CuNiCoFeCrAl2.8 high-entropy alloy coating is 100 microns-3 millimeter, the preparation equipment is simple, and the process is convenient.

Description

technical field [0001] The invention belongs to the technical field of cold spray coating preparation and alloying, in particular to an in-situ synthesis of low-pressure cold spray CuNiCoFeCrAl 2.8 Preparation method of high entropy alloy coating. Background technique [0002] CuNiCoFeCrAl 2.8 High-entropy alloys have excellent mechanical properties, such as high strength, good corrosion resistance, and excellent wear resistance. Therefore, this new metallic material is suitable for engineering applications in many fields, such as transportation, defense or nuclear and biomedical industries, etc., thereby raising high expectations from the industry. But using CuNiCoFeCrAl 2.8 High-entropy alloys are used to prepare industrial parts, and the material cost is too high. Therefore, people make high-entropy alloy into powder, spray it on the surface of other metal substrates to form a coating, and use its high strength, good wear resistance, and good corrosion resistance to i...

Claims

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Application Information

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IPC IPC(8): C23C24/08C22C30/02
CPCC22C30/02C23C24/085
Inventor 冯力王贵平安国升杨效田李文生李俊琛
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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