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A method for controlling the wettability of stainless steel surface based on femtosecond laser direct writing scanning

A femtosecond laser and surface infiltration technology, applied in the field of femtosecond laser applications, can solve the problems of complicated steps, low processing quality, time-consuming and laborious, etc., and achieve the effect of improving processing quality, high uniformity and high processing efficiency.

Active Publication Date: 2022-06-24
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of complex steps, time-consuming and laborious, and low processing quality existing in the microstructure of the surface processing and control of wettability of stainless steel materials, and to provide a method based on femtosecond laser direct writing scanning to control the surface of stainless steel. invasive method

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  • A method for controlling the wettability of stainless steel surface based on femtosecond laser direct writing scanning

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Embodiment 1

[0028] A method for controlling the wettability of stainless steel surface based on femtosecond laser direct writing scanning, the specific steps are as follows:

[0029] (1) By adjusting the pulse energy of the femtosecond laser, the scanning speed of the laser beam on the sample surface, and the scanning spacing of the lines, the pulse energy is 5 μJ, the scanning speed is 500 μm / s, and the line spacing is 30 μm. The laser beam is focused on the surface of the stainless steel material, and is scanned horizontally and then vertically by means of direct writing scanning to process a grid-like micron-scale structure.

[0030](2) Adjust the pulse energy of the femtosecond laser and the scanning speed of the laser beam on the surface of the sample again, so that the pulse energy is 0.20 μJ and the scanning speed is 300 μm / s, and the adjusted femtosecond laser beam is focused on the step (1) After processing the surface of the stainless steel material, by means of direct writing s...

Embodiment 2

[0042] A method for controlling the wettability of stainless steel surface based on femtosecond laser direct writing scanning, the specific steps are as follows:

[0043] (1) By adjusting the pulse energy of the femtosecond laser, the scanning speed of the laser beam on the sample surface, and the scanning spacing of the lines, the pulse energy is 10 μJ, the scanning speed is 700 μm / s, and the line spacing is 30 μm. The laser beam is focused on the surface of the stainless steel material, and is scanned horizontally and then vertically by means of direct writing scanning to process a grid-like micron-scale structure.

[0044] (2) Adjust the pulse energy of the femtosecond laser and the scanning speed of the laser beam on the sample surface again, so that the pulse energy is 0.14 μJ and the scanning speed is 100 μm / s. After processing the surface of the stainless steel material, by means of direct writing scanning, the central blank area of ​​the grid-like micro-scale structure...

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Abstract

The invention relates to a method for controlling the wettability of stainless steel surface based on femtosecond laser direct writing scanning, and belongs to the technical field of femtosecond laser application. By changing the pulse energy of the femtosecond laser, the scanning speed of the laser beam on the sample surface, and the scanning spacing of the lines, the present invention performs direct writing scanning on the surface of the stainless steel sample to obtain a grid-like micron-scale structure; again changing the pulse of the femtosecond laser The energy and the scanning speed of the laser beam on the sample surface are directly scanned in the central unprocessed area of ​​the resulting grid-like structure to obtain a nanoscale structure to form a multi-level structure; immerse it in a solution with a concentration of 1%-2% In the ethanol solution of perfluorooctyltriethoxysilane, fluorine-containing functional groups are formed on the surface of the sample, and then dried. The invention improves the processing efficiency and processing quality, and the processed micron-scale structure and nano-scale structure have high uniformity and neat morphology, and the surface wettability of the stainless steel is obviously regulated.

Description

Technical field [0001] The invention relates to a method for controlling the wettability of stainless steel surface based on femtosecond laser direct writing scanning, and belongs to the technical field of femtosecond laser application. Background technique [0002] In nature, many organisms have evolved properties that help them survive in specific environments. For example, lotus leaves can make water droplets fall off the surface, rose petals can absorb water droplets sticking to the surface, and some species Sharks have skin with ultra-low water resistance...and these properties are related to surface wettability. Surface wettability is divided into hydrophilicity and hydrophobicity. The measurement index is the static contact angle exhibited by water droplets when they stand on the surface. A surface with a contact angle less than 90° is a hydrophilic surface, while a surface with a contact angle greater than 90° is a surface. Hydrophobic surface. Research shows that ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/352B23K26/064B23K26/03
CPCB23K26/3584B23K26/064B23K26/032B23K26/0648
Inventor 姜澜李抑非胡洁
Owner BEIJING INSTITUTE OF TECHNOLOGYGY