Laser-modified organic glass-based protective coating for magnesium alloy surface and preparation method thereof

A technology of protective coating and plexiglass, which is applied in the coating process of metal materials, devices for coating liquid on the surface, coatings, etc., can solve the problems of processing failure and inability to play an effective protective role, and reduce roughness , Hardness improvement, cost saving effect

Active Publication Date: 2020-11-13
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual processing process, the regulation of the flow rate and airflow direction of the protective gas should match the technical parameters such as laser processing power and moving speed. For example, if the flow rate is too small or too large, it will not be able to play an effective protective role, and may even lead to processing failure.

Method used

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  • Laser-modified organic glass-based protective coating for magnesium alloy surface and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Such as figure 1 As shown, 1 is a laser, 2 is a protective coating, and 3 is a magnesium alloy. The preparation method of the laser-modified plexiglass-based protective coating on the surface of a magnesium alloy in this embodiment is carried out in the following steps:

[0021] (1) Magnesium alloy Mg 67 Zn 28 Ca 5 After cutting, use sandpaper to polish the oxide layer on the surface of the alloy in turn, roughen the surface to be processed, and finally clean it with acetone and deionized water in turn, and dry it for later use;

[0022] (2) After mixing ethyl orthosilicate and ethanol at a volume ratio of 1:0.8, slowly drop them into an aqueous solution of nitric acid with a pH value of 0.5, stir ultrasonically at room temperature for 2 hours, and obtain clear SiO after standing for 8 hours. 2 Sol;

[0023] (3) Weigh 1g of polymethyl methacrylate powder according to every 10ml of organic solvent, add polymethyl methacrylate powder to selected toluene under ultrason...

Embodiment 2

[0029] The preparation method of the magnesium alloy surface laser modified organic glass-based protective coating of the present embodiment adopts the following steps to carry out:

[0030] (1) After cutting the AZ31 magnesium alloy, sandblast the oxide layer on the surface of the alloy in turn, roughen the surface to be processed, and finally clean it with acetone and deionized water in turn, and dry it for later use;

[0031] (2) After mixing ethyl orthosilicate and ethanol at a volume ratio of 1:0.9, slowly drop them into an aqueous solution of nitric acid with a pH value of 2, stir ultrasonically at room temperature for 2 hours, and obtain clear SiO after standing for 8 hours. 2 Sol;

[0032] (3) Weigh 1.1g of polymethyl methacrylate powder according to every 10ml of organic solvent, add polymethyl methacrylate powder to selected xylene under ultrasonic stirring mode, stir until polymethyl methacrylate The ester powder is completely dispersed and dissolved in xylene;

...

Embodiment 3

[0038] The preparation method of the magnesium alloy surface laser modified organic glass-based protective coating of the present embodiment adopts the following steps to carry out:

[0039] (1) After the AZ61 magnesium alloy is cut, the oxide layer on the alloy surface is polished with sandpaper in turn, and the surface to be processed is roughened, and finally cleaned with acetone and deionized water in turn, and dried for later use;

[0040] (2) After mixing ethyl orthosilicate and ethanol at a volume ratio of 1:1, slowly drop them into an aqueous solution of nitric acid with a pH value of 1, stir ultrasonically at room temperature for 2 hours, and obtain clear SiO after standing for 8 hours.2 Sol;

[0041] (3) Weigh 1.2 g of polymethyl methacrylate powder per 10 ml of organic solvent, add polymethyl methacrylate powder to selected chloroform under ultrasonic stirring mode, and stir until polymethyl methacrylate Methyl ester powder is completely dispersed and dissolved in t...

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Abstract

The invention discloses a laser-modified organic glass-based protective coating for a magnesium alloy surface and a preparation method thereof. The protective coating comprises the following components: polymethyl methacrylate and silicon dioxide, wherein the mass percentage of silicon dioxide is 10-16.8%, and silicon dioxide is in an amorphous state. The preparation method of the protective coating comprises the following steps: dissolving ethyl orthosilicate in water to obtain silicon dioxide sol, dissolving polymethyl methacrylate in an organic solvent, adding the silicon dioxide sol into the organic solvent, carrying out standing and aging, coating the surface of a magnesium alloy base material with the silicon dioxide sol, and conducting drying to obtain the protective coating. By means of the protective coating, machining defects such as surface oxidation and ablation in the laser modification machining process of a magnesium alloy can be effectively overcome. Compared with traditional inert gas shielding, the invention has the advantages that cost can be saved, the roughness of the surface of the magnesium alloy after laser processing can be obviously reduced, and process isrelatively simple.

Description

technical field [0001] The invention relates to a laser-modified organic glass-based protective coating on the surface of an alloy and a preparation method thereof, in particular to a laser-modified organic glass-based protective coating on the surface of a magnesium alloy and a preparation method thereof. Background technique [0002] Due to its high specific strength and high specific stiffness, the density of magnesium alloy is very close to that of human bone, and its good biocompatibility makes it have a very good application prospect in medical devices. However, its low corrosion resistance and rapid degradation in the human body limit the application of magnesium alloys. In order to slow down the corrosion progress of magnesium alloys, the main surface modification technologies are: plasma spraying, sol-gel, organic coating and laser modification. In the process of laser processing, in order to prevent the material from reacting with the air in the high temperature p...

Claims

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Application Information

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IPC IPC(8): C09D133/12C09D7/61B05D7/16C23C26/00
CPCC09D133/12C09D7/61B05D7/16C23C26/00C08K2201/011C08K3/36
Inventor 周广宏丁浩丁红燕厉虹夏木建仇安于彦龙
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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