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.
CN110344047AActive Publication Date: 2019-10-18LANZHOU UNIVERSITY OF TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
LANZHOU UNIVERSITY OF TECHNOLOGY
Publication Date
2019-10-18

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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.
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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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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