A kind of cu-based amorphous powder for cold spraying and its preparation method and application

A technology of amorphous powder and cold spraying, applied in the direction of pressure inorganic powder plating, coating, metal material coating process, etc., can solve the problems of low deposition temperature, oxidation, high particle speed, etc., and achieve high coating density, The effect of increasing the degree of mismatch and improving the configuration entropy value

Active Publication Date: 2022-07-29
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few studies on Cu-based amorphous coatings at present, and most of the amorphous alloy coating techniques (such as thermal spraying technology) have serious oxidation phenomenon when depositing Cu-based amorphous alloy coatings, while cold The spraying technology has the characteristics of low deposition temperature, high particle velocity, and no use of fuel gas, etc., which can effectively solve the oxidation problem in the deposition process of Cu-based amorphous alloy coating and significantly improve the coating deposition quality

Method used

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  • A kind of cu-based amorphous powder for cold spraying and its preparation method and application
  • A kind of cu-based amorphous powder for cold spraying and its preparation method and application
  • A kind of cu-based amorphous powder for cold spraying and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0026] A Cu-based amorphous powder for cold spraying is composed of the following elements, and the atomic percentage of each element is as follows: 13.0at% Zr, 27.7wt% Ti, 5.0at% Ni, 4.0at% Al, 0.5at% Sn, and the rest The amount is Cu, the powder is nearly spherical, and the particle size is 10-45 μm.

[0027] The above-mentioned preparation method of Cu-based amorphous powder for cold spraying comprises the following steps:

[0028] 1)Accurately calculate and weigh CuZr alloy, pure Cu, Ti powder, pure Ni, pure Al, pure Sn according to the composition ratio of 6 elements;

[0029] 2) Add pure Ti powder, pure Ni, CuZr alloy, pure Cu, pure Al and pure Sn into the vacuum induction induction furnace in order of melting point from high to low, then heat up to 1670±5°C at 50°C / s and keep warm 30min to make it all melted. During the heat preservation period, argon gas was continuously introduced into the vacuum furnace, and the metal liquid was continuously stirred by the electrom...

Embodiment 2

[0034] A Cu-based amorphous powder for cold spraying is composed of the following elements, and the atomic percentage of each element is as follows: 14.2at% Zr, 25.7at% Ti, 5.4at% Ni, 4.5at% Al, 0.7at% Sn, and the rest The amount is Cu, the powder is nearly spherical, and the particle size is 10-45 μm.

[0035] The preparation method and the steps of preparing the protective coating are the same as those in Example 1.

Embodiment 3

[0037] A Cu-based amorphous powder for cold spraying is composed of the following elements, and the atomic percentages of each element are as follows: 15.5at% Zr, 25.3at% Ti, 6.2at% Ni, 5.4at% Al, 1.2at% Sn, and the rest The amount is Cu, the powder is nearly spherical, and the particle size is 10-45 μm.

[0038] In the preparation method, except that the drying temperature in step 2) was changed to 80° C. and the drying time was 2 h, the rest were the same as those in Example 1.

[0039] In the step of preparing the protective coating, except that the carrier gas preheating temperature is 800°C, the spraying pressure is 6MPa, the spray gun moving speed is 0.20m / s, the spraying distance is 30mm, the powder feeder rotation speed is 5rpm, and the spraying thickness is 250μm, the rest are the same as in Example 1.

[0040] Depend on figure 1 It can be seen that both the prepared Cu-based amorphous powder and coating have only one broadened steamed bread peak, showing a typical a...

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Abstract

The invention discloses a Cu-based amorphous powder for cold spraying and a preparation method and application thereof. The powder contains: 13.0-17.4at% Zr, 23.5-27.7at%Ti, 5.0-7.2at%Ni, 4.0-6.4at%Al, 0.5-1.5at%Sn, the balance is Cu, and the powder is 10-45μm spherical powder. The raw materials are added into a vacuum induction induction furnace and heated to be completely melted, and argon gas is used for vacuum air atomization treatment, and the atomized powder is dried and classified to obtain Cu-based amorphous powder. The powder can be deposited using a supersonic cold spray system to form a Cu-based amorphous protective coating. The present invention can obtain Cu-based amorphous powder with all-amorphous structure. The Cu-based amorphous coating prepared by using this powder also has a fully amorphous structure, with high coating density, no oxide inclusions, porosity <1%, and microhardness >600HV 0.1 .

Description

technical field [0001] The invention belongs to the field of cold spraying of material processing engineering, and particularly relates to a Cu-based amorphous powder for cold spraying and a preparation method and application thereof. technical background [0002] Amorphous alloys, also known as metallic glasses, are different from general crystalline alloys in that their atoms have the structural characteristics of long-range disorder and short-range order, and there are no crystal defects such as dislocations and grain boundaries. This characteristic makes amorphous alloys have more excellent properties than crystalline alloys of the same composition, such as high strength, high elastic modulus, high hardness, high corrosion resistance, high wear resistance and fatigue resistance. [0003] At present, researchers have developed Fe-based, Al-based, Cu-based, Ni-based, Co-based, Ti-based, Zr-based and other series of amorphous alloys. It is worth noting that, compared with ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C45/00B22F9/08C23C24/04
CPCC22C45/001B22F9/082C23C24/045B22F2009/0824B22F2009/0848
Inventor 吴玉萍汪煜钧程杰乔磊洪晟
Owner HOHAI UNIV
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