Preparation method for aluminum-based amorphous alloy coating

An amorphous alloy and coating technology, which is applied in metal material coating process, coating, heating inorganic powder coating, etc., can solve poor wear resistance, poor compatibility of surface coating, and difference in corrosion resistance of magnesium alloys, etc. problem, to achieve the effect of increasing corrosion resistance, avoiding shedding, and solving the difference in corrosion resistance

Inactive Publication Date: 2020-03-20
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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Problems solved by technology

[0008] The purpose of the present invention is to overcome the shortcomings of the prior art, to design a method for preparing an aluminum-based amorphous alloy coating, and to solve

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  • Preparation method for aluminum-based amorphous alloy coating
  • Preparation method for aluminum-based amorphous alloy coating
  • Preparation method for aluminum-based amorphous alloy coating

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Example Embodiment

[0024] Example 1:

[0025] The technical process of the preparation method of the aluminum-based amorphous alloy coating involved in this embodiment is to spray 5-15 μm Al 85 Ce 10 Ni 5 The original powder is sprayed on the surface of the substrate under the spraying process conditions of powder feeding rate of 1.5g / s, spraying distance of 25mm, spraying temperature of 520°C, spraying pressure of 2.5MPa and walking speed of 20mm / s to form aluminum-based Crystal alloy coating.

[0026] The main structure of the spraying tooling involved in the present invention includes a spray gun 1, a No. 1 powder feeding pipe 5, a No. 2 powder feeding pipe 6, a needle-shaped obstacle 7 and a connecting rod 8; the spray gun 1 is composed of a nozzle 2 and a spray chamber 3, and the nozzle The connection between 2 and the injection chamber 3 is the throat 4, the No. 1 powder feeding pipe 5 and the No. 2 powder feeding pipe 6 extend into the nozzle 2 respectively, and the needle-shaped obsta...

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Abstract

The invention belongs to the technical field of surface engineering, and relates to a method of preparing an aluminum-based amorphous alloy coating on the surface of a magnesium-lithium alloy in a minimum weight gain mode. A dense aluminum-based amorphous alloy coating with the thickness being 20 mum or below is prepared on a magnesium alloy matrix through a cold spraying process method by using aspraying tool; the medium and the substrate are completely and physically isolated; the corrosion risk of the matrix is reduced by utilizing low pitting corrosion sensitivity of the amorphous coating; the spraying process is correspondingly adjusted according to the surface treatment characteristics of the matrix, the deposition characteristics of the original powder and the powder feeding speed;the original powder is enabled to be deformed into a flat shape under a specified high-temperature condition; consequently, the thickness of the coating is controlled, after original powder enters the throat, the temperature is sharply reduced to 200 DEG C or below, the original powder does not conduct large energy exchange, the loss amount of the amorphous content is smaller than 1%,, and through XRD calculation, the amorphous content of a coating formed by the original powder is increased by 1%-3%, the thinnest coating can reach 10 mum, and penetrating holes do not exist.

Description

Technical field: [0001] The invention belongs to the technical field of surface engineering, and in particular relates to a method for preparing an aluminum-based amorphous alloy coating on the surface of a magnesium-lithium alloy by adopting a minimum weight gain method. Background technique: [0002] Magnesium-lithium alloy is a special type of alloy, which has the lowest density among metal materials used in structures, only 970-1350kg / m 3 , the lightest one can float on the water, and become the "water floating" alloy, which has a significant weight reduction effect when used in the manufacture of aerospace structural parts. The biggest disadvantage of magnesium-lithium alloys is high chemical activity, lower corrosion resistance than conventional magnesium alloys, and severe stress corrosion tendency. It is not feasible to reduce the corrosion rate of magnesium alloys by alloying. Adding alloying elements such as aluminum to magnesium-lithium alloys will further reduce...

Claims

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Application Information

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IPC IPC(8): C23C24/08C22C45/08
CPCC22C45/08C23C24/087
Inventor 黄国胜王治中
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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