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Method for stripping and removing coating on surface of base body

A surface coating and coating technology, applied in the direction of cleaning methods and utensils, chemical instruments and methods, etc., can solve problems such as substrate damage, achieve the effects of ensuring service life, improving stripping efficiency, and prolonging action time

Pending Publication Date: 2021-08-27
GUANGDONG INST OF NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the deficiencies in the prior art, the purpose of the embodiment of the present application includes providing a method for stripping and removing the surface coating of the substrate, so as to improve the technical problem of damage to the substrate caused by mechanical grinding coating

Method used

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  • Method for stripping and removing coating on surface of base body
  • Method for stripping and removing coating on surface of base body
  • Method for stripping and removing coating on surface of base body

Examples

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preparation example Construction

[0039] The peeled coating of the present application is prepared by cold spraying method. The preparation method of the coating includes: using inert gas as the accelerating gas, the gas pressure is 0.5-5MPa, the gas temperature is 100-1000°C, and the moving speed of the spray gun is 10-1000mm / s, the sprayed powder particle size is 10-70μm. In some embodiments of the present application, the accelerating gas is nitrogen or helium. The coating prepared by the preparation method is well bonded to the metal substrate and is not easily peeled off by mechanical means. Therefore, the coating is more suitable for removing the coating on the surface of the substrate by the stripping method provided in the present application. It should be noted that the method for stripping and removing the coating on the surface of the substrate provided in this application is also applicable to coatings prepared by other preparation methods, not limited to the cold spray preparation process.

[0...

Embodiment 1

[0050] The present embodiment provides a method for stripping and removing the substrate surface coating, including:

[0051] Select the IN718 substrate with IN718 coating, the coating is made by cold spraying, and the thickness of the coating is 1.5mm. A black adhesive tape is set on the surface of the coating as a protective layer, and K9 glass is set on the surface of the protective layer as a constraining layer.

[0052] A laser is used to align the coating, wherein the distance between the source of the laser beam and the coating is 0.2 mm. The laser beam is irradiated vertically on the surface of the coating.

[0053] Turn on the laser and scan the surface of the coating with laser irradiation. Among them, the energy of the laser beam is 10J, the frequency is 10Hz, and the energy density is 8GW / cm 2 . The spot of the laser beam used in the embodiment of the present application is circular, and the laser beam scans row by row or column by row. In order to make the las...

Embodiment 2

[0057] The present embodiment provides a method for stripping and removing the substrate surface coating, comprising:

[0058] Select with Ti 6 Al 4 V-coated Ti 6 Al 4 V substrate, the coating is made by cold spraying, the thickness of the coating is 0.5mm. A black adhesive tape is set on the surface of the coating as a protective layer, and a transparent water layer is set on the surface of the protective layer as a constraint layer.

[0059] A laser is used to align the coating, wherein the distance between the source of the laser beam and the coating is 0.2 mm. The laser beam is irradiated vertically on the surface of the coating.

[0060] Turn on the laser and scan the surface of the coating with laser irradiation. Among them, the energy of the laser beam is 10J, the frequency is 4Hz, and the energy density is 4.43Gw / cm 2 . The spot of the laser beam used in the embodiment of the present application is circular, and the laser beam scans row by row or column by row....

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Abstract

The invention relates to a method for stripping and removing a coating on the surface of a base body, and belongs to the technical field of base body coating separation. The method for stripping and removing the coating on the surface of the base body comprises the steps that laser irradiation is performed on the coating attached to the surface of a metal base body, laser irradiates from the side, away from the metal base body, of the coating, the energy of a laser beam is 5-30 J, and the frequency of the laser beam is 4-20 Hz. According to the method, the laser beam with certain energy and frequency is used for irradiating the base body, and certain impact is generated in the base body, so that vibration is generated at the interface of the coating and the base body. Besides, the impact wave can cause the reduction of the binding force between the coating and the base body, so that the coating is peeled off. Therefore, the method can be effectively used as a coating and base body separation technology.

Description

technical field [0001] The present application relates to the technical field of substrate coating separation, and in particular to a method for stripping and removing a substrate surface coating. Background technique [0002] In the process of repairing and remanufacturing the surface of parts by cold spraying and thermal spraying, the existing metal or ceramic or metal matrix composite coating on the surface of the part often needs to be peeled off and removed, and then the coating is re-deposited. The traditional method of stripping and removing the coating is mainly mechanical grinding. However, for parts with complex shapes or thick coatings, mechanical grinding has great difficulties and will cause a certain degree of damage and damage to the parts themselves. destroy. Contents of the invention [0003] In view of the deficiencies in the prior art, the purpose of the embodiments of the present application includes providing a method for stripping and removing the co...

Claims

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Application Information

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IPC IPC(8): B08B7/00B08B13/00
CPCB08B7/0042B08B13/00
Inventor 孙文孙训东黄仁忠谢迎春褚欣兰海明张科杰王高民
Owner GUANGDONG INST OF NEW MATERIALS
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