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Self-cleaning metal surface and preparation method and machining device of self-cleaning metal surface

A metal surface, self-cleaning technology, used in metal processing equipment, manufacturing tools, welding equipment, etc., can solve the problems of long processing time, not meeting the goals of the manufacturing industry, etc., to achieve low cost, efficiency, green environmental protection, and simple equipment Effect

Inactive Publication Date: 2020-07-31
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This post-processing process takes too long and the technique does not meet the manufacturing goals

Method used

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  • Self-cleaning metal surface and preparation method and machining device of self-cleaning metal surface
  • Self-cleaning metal surface and preparation method and machining device of self-cleaning metal surface
  • Self-cleaning metal surface and preparation method and machining device of self-cleaning metal surface

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preparation example Construction

[0035] The preparation method provided by the invention can prepare a self-cleaning metal surface in one step by using a nanosecond pulsed laser, does not require a subsequent treatment process, and can be placed directly in a natural environment after irradiation. The process is simple, efficient and environmentally friendly.

[0036] Another aspect of the present invention provides a device for implementing the above method, please refer to figure 1 An embodiment of a device is shown, the device includes a nanosecond laser 100, a controller 110, an optical lens 120, and a translation stage 130. In this embodiment, the translation stage 130 is a two-dimensional translation stage, which can realize two-dimensional The metal 140 is fixed on the translation stage 130 during the movement on the plate. In the present invention, the nanosecond laser 100 outputs a single beam of laser light, and the device only needs to guide and irradiate the single beam of laser light on the metal...

Embodiment 1

[0041] Put the cleaned aluminum on the translation stage, adjust the working parameters of the Nd:YAG nanosecond pulse laser source: a single nanosecond laser pulse with a wavelength of 1064nm, a pulse width of 6ns, and an energy of 192mJ is irradiated to obtain a self-cleaning aluminum surface, and Wettability tests, microstructure observations and Fourier transform infrared spectroscopy tests were carried out on the aluminum surface respectively. The test results are shown in image 3 , Figure 4 , Figure 5 .

[0042] see image 3 As shown, before the nanosecond pulse laser processing, the contact angle between the water droplet and the aluminum surface 150 was measured by using 5 microliters of water droplets, and the contact angle between the water droplet and the aluminum surface 150 was measured to be 80°, showing hydrophilic characteristics, which is a typical metal surface characteristic . After laser irradiation, the contact angle between the water droplet and th...

Embodiment 2

[0047] Place the cleaned stainless steel on the translation stage, adjust the working parameters of the Nd:YAG nanosecond pulse laser source: irradiate with a single nanosecond laser pulse with a wavelength of 1064nm, a pulse width of 6ns, and an energy of 390mJ to obtain a self-cleaning stainless steel surface. Wettability tests and microstructure observations were carried out on the stainless steel surface respectively, and the test results are shown in Figure 7 and Figure 8 .

[0048] see Figure 7 As shown, before the nanosecond pulse laser processing, the contact angle between the water droplet and the stainless steel surface 160 was measured by using 5 microliters of water droplets, and the contact angle between the water droplet and the stainless steel surface 160 was measured to be 51°, showing hydrophilic characteristics, which is a typical metal surface characteristic . After laser irradiation, the contact angle between the water droplet and the stainless steel ...

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Abstract

The invention relates to the technical field of laser machining, and provides a method for preparing a self-cleaning metal surface based on nanosecond pulse laser, a device applying the method and theself-cleaning metal surface manufactured through the method or the device. The method comprises the steps that the surface of metal to be processed is washed; and the self-cleaning metal surface is obtained after the metal surface is radiated through the nanosecond pulse laser. The self-cleaning metal surface can be prepared through one step, following treatment process is not needed, the self-cleaning metal surface is put in a natural environment after being radiated, the process is simple, the efficiency is high, and the process is environmental-friendly. The device comprises a laser used for outputting single-beam nanosecond pulse laser, a controller, a horizontal moving platform and an optical module used for guiding the laser to the metal surface. According to the device, only the nanosecond laser is needed, focusing components are not needed, the equipment is simple, and compared with a picosecond laser and a femtosecond laser, the nanosecond laser is low in cost and more suitable for industrialized application. The self-cleaning metal surface manufactured through the method or device is hydrophobic and durable in hydrophobic property.

Description

technical field [0001] The present invention relates to the technical field of laser processing, and more specifically, relates to a method for preparing a self-cleaning metal surface based on nanosecond pulsed laser, a processing device for implementing the method, and a self-cleaning metal surface prepared by the method or device. Background technique [0002] When a water droplet comes into contact with a solid surface, its contact angle is measured to define the wetting properties of that surface. When the contact angle is in the range of 90°-150°, it is defined as having hydrophobic properties; when the contact angle is about 150°, it is defined as having super-hydrophobic properties. Superhydrophobic surfaces have low surface energy molecules. However, only low surface energy molecules are not enough to form superhydrophobic surfaces, and additional micro-nanostructures are required. On the other hand, superhydrophobic surfaces exist in nature, such as lotus leaves, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/352
Inventor 吴志荣杨建军郭春雷赵波
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI