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Graphene modified laser absorption layer coating and coating method thereof

A graphene modification and laser absorption technology, which is applied in the field of surface treatment of parts, can solve problems such as low efficiency, poor quality uniformity, and poor coating quality of laser absorption layers, so as to reduce damage rate and improve laser burn resistance Erosion ability, the effect of improving the utilization rate of laser energy

Active Publication Date: 2021-07-09
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Application Information

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Problems solved by technology

[0003] The purpose of the invention is: to propose a graphene-modified laser absorbing layer coating and its coating method, which can solve the difficult problems of poor coating quality, low efficiency, and poor quality uniformity of the laser absorbing layer of complex parts, and reduce the The probability of damage to the laser absorbing layer improves the surface quality of laser shock strengthening of complex parts and meets the needs of high-quality complex parts for anti-fatigue

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  • Graphene modified laser absorption layer coating and coating method thereof
  • Graphene modified laser absorption layer coating and coating method thereof

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Embodiment 1

[0037] The invention discloses a graphene-modified laser absorbing layer coating, which is mainly composed of polyurethane resin, black auxiliary material, functional auxiliary agent and deionized water. Wherein, polyurethane resin (50%), black auxiliary material (20%), functional auxiliary agent (10%) and deionized water (20%) are all percentages by mass; polyurethane resin is an aqueous emulsion with a solid content of 10% (mass percentage); black auxiliary material is the carbon black that comprises graphene powder, and the content of graphene is 1.0% (mass percentage); Functional auxiliary agent is sodium stearate.

[0038] The coating method of the laser absorbing layer coating of this graphene modification, the step of coating is as follows:

[0039] (1) Part surface cleaning: use alcohol ultrasonic cleaning to clean the surface of the part to be strengthened by laser shock;

[0040] (2) Coating preparation: Add graphene powder into deionized water to form graphene slur...

Embodiment 2

[0044] The contents of polyurethane resin, black auxiliary material, functional auxiliary agent and deionized water of the coating are X, Y, Z and R respectively, wherein X=70%, Y=15%, Z=10%, R=5% , both are mass percentages. In addition, the polyurethane resin is an aqueous emulsion with a solid content of 60% (mass percentage); the black auxiliary material is black iron oxide containing water-based graphene slurry, and the content of graphene is 5.0% (mass percentage);

[0045] The coating method of the laser absorbing layer coating of this graphene modification, the step of coating is as follows:

[0046] (1) Part surface cleaning: Use alcohol dipped in gauze to wipe the surface of the part to be laser shock strengthened;

[0047] (2) Coating preparation: add the water-based graphene slurry into deionized water to form a graphene slurry, then ultrasonically disperse iron oxide black in the graphene slurry, and then add the mixed slurry into the water-based polyurethane res...

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Abstract

The invention belongs to the technical field of part surface treatment, and relates to a graphene modified laser absorption layer coating and a coating method thereof. The coating is mainly composed of polyurethane resin, a black auxiliary material, a functional auxiliary agent and deionized water. After graphene modification, higher amplitude and deeper surface residual compressive stress distribution are generated on the surface of the part. The laser absorption layer coating is coated on the surface of a part in a high-pressure gas driven spraying mode, a coating with uniform thickness is obtained on the surface of a complex part after drying, the binding force between the coating and the part is good, and the coating can be removed through manual stripping after laser shock is completed. The method has the advantages of being high in coating efficiency, good in quality reliability, high in removal efficiency and the like, and machining and mass production of complex parts are facilitated.

Description

technical field [0001] The invention belongs to the technical field of parts surface treatment, and relates to a graphene-modified laser absorbing layer coating and a coating method thereof. Background technique [0002] Laser shock strengthening is an advanced surface strengthening technology, which uses the mechanical effect of high-energy plasma shock waves induced by lasers to generate plastic deformation layers and residual compressive stress layers on the surface of parts, thereby improving the fatigue performance of parts. Laser pulses are not directly irradiated on the surface of the part, but indirectly irradiated on the laser absorbing layer on the surface of the part. The absorbing layer has high laser energy absorption rate, heat insulation and excellent comprehensive mechanical properties. At present, the commonly used laser absorbing layer is black tape or aluminum foil, which is manually pasted on the surface of the part. This method has the advantages of sim...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D7/61B05D1/02B05D7/24
CPCC09D175/04C09D7/61B05D7/24B05D1/02B05D2503/00B05D2301/00C08K2003/2275C08K3/042C08K3/04C08K3/22
Inventor 罗学昆杨瑞王欣王强马世成许春玲宇波于洋
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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