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Method for preparing amorphous composite coating through laser cladding

A technology of laser cladding and composite coating, which is applied in coating, metal material coating technology, etc., can solve the problem of unclear coexistence form and formation mechanism of amorphous phase and crystal phase, unsatisfactory comprehensive performance of coating, and amorphous Coating composition design and control, unstable process parameters and other problems, to achieve the effect of good macroscopic appearance, tight bonding and low porosity

Inactive Publication Date: 2020-05-12
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the coexistence form and formation mechanism of amorphous and crystalline phases under laser cladding conditions, the composition design and control of amorphous coatings and process parameters are unstable, and the overall performance of the obtained coatings cannot meet the complex service conditions.

Method used

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  • Method for preparing amorphous composite coating through laser cladding
  • Method for preparing amorphous composite coating through laser cladding
  • Method for preparing amorphous composite coating through laser cladding

Examples

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Effect test

Embodiment 1

[0020] A method for preparing an amorphous composite coating by laser cladding, specifically comprising the following steps:

[0021] (1) Grind the TC4 titanium alloy with metallographic sandpaper to remove the surface oxide film, soak the polished TC4 titanium alloy in 4% NaOH aqueous solution for 10 minutes, then rinse with water and put in absolute ethanol Ultrasonic cleaning in medium to remove residual oil and impurities on the surface; after cleaning, dry at 60°C for 1 hour.

[0022] (2) Using Zr powder, Cu powder, Al powder, Ni powder, and nano-SiC powder with a purity of 99.95% as raw materials, the atomic ratio of Zr powder, Cu powder, Al powder, and Ni powder is 55:35:10: 5. Mix, and then mix the uniformly mixed powder and nano-SiC powder according to the ratio of 99.3:0.7 in mass percentage, and mix Zr powder, Cu powder, Al powder, Ni powder and nano-SiC powder uniformly by ball milling to obtain a molten Coating powder, ball milling parameters are ball milling spe...

Embodiment 2

[0026] A method for preparing an amorphous composite coating by laser cladding, specifically comprising the following steps:

[0027] (1) Grind the TC4 titanium alloy with metallographic sandpaper to remove the surface oxide film, soak the polished TC4 titanium alloy in 5% NaOH aqueous solution for 8 minutes, then rinse with water and put in absolute ethanol Ultrasonic cleaning in medium to remove residual oil and impurities on the surface; after cleaning, dry at 80°C for 0.8h.

[0028] (2) Using Zr powder, Cu powder, Al powder, Ni powder, and nano-SiC powder with a purity of 99.95% as raw materials, the atomic ratio of Zr powder, Cu powder, Al powder, and Ni powder is 55:35:10: 5. Mix, and then mix the uniformly mixed powder and nano-SiC powder according to the ratio of 99:1 by mass percentage, and mix Zr powder, Cu powder, Al powder, Ni powder and nano-SiC powder uniformly by ball milling to obtain a molten Coating powder, ball milling parameters are ball milling speed 50r / ...

Embodiment 3

[0031] A method for preparing an amorphous composite coating by laser cladding, specifically comprising the following steps:

[0032] (1) Grind the TC4 titanium alloy with metallographic sandpaper to remove the surface oxide film, soak the polished TC4 titanium alloy in 6% NaOH aqueous solution for 5 minutes, then rinse with water and put in absolute ethanol Ultrasonic cleaning in medium to remove residual oil and impurities on the surface; after cleaning, dry at 70°C for 1 hour.

[0033](2) Using Zr powder, Cu powder, Al powder, Ni powder, and nano-SiC powder with a purity of 99.95% as raw materials, the atomic ratio of Zr powder, Cu powder, Al powder, and Ni powder is 55:35:10: 5. Mix, and then mix the uniformly mixed powder and nano-SiC powder according to the ratio of 99.5:0.5 in mass percentage, and mix Zr powder, Cu powder, Al powder, Ni powder and nano-SiC powder uniformly by ball milling to obtain a molten Coating powder, ball milling parameters are ball milling speed...

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Abstract

The invention discloses a method for preparing an amorphous composite coating through laser cladding, and belongs to the technical field of alloy surface coating modification. The method comprises thesteps that a titanium alloy is pretreated; and Zr powder, Cu powder, Al powder and Ni powder are mixed evenly through ball grinding according to the atom ratio being 55:35:10:5 to be prepared into Zr55Cu35Al10Ni5 mixed powder; and the evenly-mixed powder and nanometer SiC powder are mixed evenly according to the mass percentage being (99-99.5):(0.5-1) to be prepared into cladding powder. The surface of a titanium alloy substrate and preset powder are molten together through laser cladding, and the coating is prepared on the titanium alloy through high-energy laser beams. By means of the method, the nanometer SiC enhanced amorphous composite coating is prepared on the surface of the titanium alloy, and therefore the hardness and wear resistance of the surface of the matrix material are improved.

Description

technical field [0001] The invention relates to a method for preparing an amorphous composite coating by laser cladding, and belongs to the technical field of alloy surface coating modification. Background technique [0002] The research on laser cladding technology has a history of about 45 years. Although there are many theoretical and experimental studies, this technology has not been widely used in actual industrial production. The development of special alloys related to laser cladding is more are getting more and more attention. Amorphous alloys, also known as metallic glasses. The metal atoms of amorphous alloys are arranged in long-range disorder in three-dimensional space, and only maintain short-range order within a certain range. The unique crystal structure of amorphous alloys determines that it has many excellent properties that conventional crystalline alloys do not have, such as high hardness and strength, and excellent wear resistance and corrosion resistan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C45/10C22C16/00C22C32/00
CPCC23C24/103C22C45/10C22C16/00C22C32/0063
Inventor 刘洪喜罗璇张晓伟付艳慧余登得
Owner KUNMING UNIV OF SCI & TECH
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