CN107262916B - The nanosecond laser rescan preparation method of aluminum alloy surface superhydrophobic microstructure - Google Patents
The nanosecond laser rescan preparation method of aluminum alloy surface superhydrophobic microstructure Download PDFInfo
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- CN107262916B CN107262916B CN201710470109.5A CN201710470109A CN107262916B CN 107262916 B CN107262916 B CN 107262916B CN 201710470109 A CN201710470109 A CN 201710470109A CN 107262916 B CN107262916 B CN 107262916B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/352—Working by laser beam, e.g. welding, cutting or boring for surface treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/361—Removing material for deburring or mechanical trimming
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/60—Preliminary treatment
Abstract
The nanosecond laser rescan preparation method of aluminum alloy surface superhydrophobic microstructure belongs to material surface technical field, solves the problems, such as using valuableness and have pollution chemical reagent to carry out modification of surfaces to reduce material surface energy.The present invention is the following steps are included: aluminum alloy specimen polish and be cleaned by ultrasonic using deionized water；It is placed in the machine table of nanosecond laser equipment again；The focal plane and aluminum alloy specimen upper surface of adjustment nanosecond laser equipment processing are in same plane；Equidistant straight line is drawn at nanosecond laser equipment operation interface, straight line spacing is set as 50~100 microns, adjusts power, pulse number and the scanning speed numerical value to needed for testing of nanosecond laser equipment, carries out first time nanosecond laser scanning machining；It adjusts scanning speed and carries out second of nanosecond laser scanning machining；Laser ablation aluminum alloy specimen is cleaned by ultrasonic with deionized water；The laser ablation aluminum alloy specimen of cleaning is placed in and is air-dried at room temperature.
Description
Technical field
The invention belongs to material surface technical fields, are the improving technologies in terms of aluminum alloy material surface wetability, specifically
It is related to a kind of method of super-hydrophobic micro-nano structure that aluminum alloy material surface is constructed by nanosecond laser rescan.
Background technique
In recent years aluminum alloy materials because intensity with higher and it is light the advantages that, in Aeronautics and Astronautics, automobile, machinery
It has been widely used in manufacture, ship and chemical industry.By constructing micro-structure and low-surface-energy in aluminum alloy surface
The method of substance modification can prepare super hydrophobic surface, in antifog, waterproof, snow defence, anti-oxidant, anti-pollution, anticorrosion and from clear
It is clean etc. that there is great application prospect.The machinings such as laser ablation method, low speed Wire EDM and high-speed milling
Method is largely applied in the processing of micro-structure.
Laser technology has been quickly grown since appearance, because the excellent properties such as it is efficient, stable, length of reliable and service life are extensive
Microfabrication applied to surface.However the higher cost of the most excellent femtosecond laser of properties is used, therefore study and add
Application of the lower-cost nanosecond laser of work in terms of microfabrication just has highly important realistic meaning.When laser and aluminium close
When gold surface interacts, it may occur that material is heated part after absorbing light, and is possible to the light of further occurrence complexity
Phenomena such as causing chemical reaction and ablation, the generation of plasma, the environment of the characteristic and ablation of laser and aluminium alloy all can shadow
Ring this phenomenon.
Summary of the invention
It is an object of the invention to propose a kind of nanosecond laser rescan preparation of aluminum alloy surface superhydrophobic microstructure
Laser is utilized to the mechanism of action of aluminum alloy materials in method, and the superficial layer containing hydrophobic elements is formd on material, solves
Using valuableness and there is the problem of pollution chemical reagent carrys out modification of surfaces to reduce material surface energy, while its distinctive rule
Then micro-structure enables aluminum alloy to surface and has ultra-hydrophobicity.
To achieve the above object, the nanosecond laser rescan preparation side of aluminum alloy surface superhydrophobic microstructure of the invention
Method the following steps are included:
Step 1: pretreatment polishes aluminum alloy specimen on polishing machine using sand paper, and super using deionized water
Sound cleaning, removes remained on surface clast, is placed in and air-dries at room temperature；
Step 2: carrying out nanosecond laser etching processing for the aluminum alloy specimen being cleaned by ultrasonic in step 1, specifically:
1) aluminum alloy specimen being cleaned by ultrasonic in step 1 is placed in the machine table of nanosecond laser equipment；
2) focal plane of adjustment nanosecond laser equipment processing makes the focal plane of processing and aluminum alloy specimen upper surface be in same
One plane；
3) equidistant straight line is drawn at nanosecond laser equipment operation interface, straight line spacing is set as 50~100 microns, adjusts
Power, pulse number and the scanning speed of whole nanosecond laser equipment numerical value to needed for testing, carry out the scanning of first time nanosecond laser
Processing；
4) adjustment scanning speed carries out second of nanosecond laser scanning machining；
5) process finishing；
Step 3: laser ablation aluminum alloy specimen obtained in step 2 is cleaned by ultrasonic with deionized water, is gone by post-processing
Except surface residual debris；
Step 4: the laser ablation aluminum alloy specimen cleaned through step 3 is placed in and is air-dried at room temperature, is obtained with micro-nano
The super-hydrophobic aluminum alloy surface of compound double mesostructures.
It is described in step 1 to polish aluminum alloy specimen using sand paper on polishing machine specifically: aluminum alloy specimen
It is successively polished using the sand paper of model 400#, 600#, 1000# and 2000# on polishing machine.
It is described in step 1 to polish aluminum alloy specimen using sand paper on polishing machine, the surface of test piece after polishing
Roughness Ra < 0.22 μm.
The time for using deionized water to be cleaned by ultrasonic in step 1 is 5min.
Numerical value needed for test described in step 2 specifically: power 16W, pulse number 3, scanning speed 500mm/
s。
Second of nanosecond laser scanning machining scanning speed is adjusted to 1000mm/s in step 2.
The time for using deionized water to be cleaned by ultrasonic in step 3 is 5min.
Drawing the straight line spacing of equidistant straight line in step 2 at nanosecond laser equipment operation interface is 50 microns.
The invention has the benefit that the nanosecond laser rescan system of aluminum alloy surface superhydrophobic microstructure of the invention
Preparation Method is micro- by the bullet that the method for nanosecond laser rescan prepares class Egg tray and array in aluminum alloy surface
Structure enables aluminum alloy to specimen surface and is provided with ultra-hydrophobicity.Use cost of the present invention is lower and processing performance lasting stability
Nanosecond laser equipment, compared with existing preparation process, the method and process of nanosecond laser rescan is simple, it is at low cost, do not make
The compound double mesostructures of micro-nano can be prepared with costly and hazardous chemical substance, and make table not through chemical modification
There is hydrophobic element in face.Compared with existing machinery processing technology, preparation method operation of the invention is simpler, processes work
Skill is more stable, and the better mechanical property of micro-structure surface, the process-cycle is short, and does not use costly, hazardous chemical reagent.
Detailed description of the invention
Fig. 1 is the nanosecond laser rescan preparation method flow chart of aluminum alloy surface superhydrophobic microstructure of the invention；
Fig. 2 is the image after preparation method of the present invention processing, under the scanning electron microscope on aluminum alloy specimen surface；
Fig. 3 is the static contact angle of unprocessed aluminium alloy surface of test piece；
Fig. 4 is the static contact angle using aluminum alloy surface prepared by the present invention.
Specific embodiment
Embodiments of the present invention are described further with reference to the accompanying drawing.
Referring to attached drawing 1, the nanosecond laser rescan preparation method packet of aluminum alloy surface superhydrophobic microstructure of the invention
Include following steps:
Step 1: pretreatment, by aluminum alloy specimen on polishing machine successively using model 400#, 600#, 1000# and
The sand paper of 2000# is polished, surface roughness Ra < 0.22 μm after polishing；And it is cleaned by ultrasonic using deionized water
5min removes remained on surface clast, is placed in and air-dries at room temperature；
Step 2: carrying out nanosecond laser etching processing for the aluminum alloy specimen being cleaned by ultrasonic in step 1, specifically:
1) aluminum alloy specimen being cleaned by ultrasonic in step 1 is placed in the machine table of nanosecond laser equipment；
2) focal plane of adjustment nanosecond laser equipment processing makes the focal plane of processing and aluminum alloy specimen upper surface be in same
One plane；
3) equidistant straight line is drawn at nanosecond laser equipment operation interface, straight line spacing is set as 50~100 microns, mesh
Be that contact angle is uniform in size consistent everywhere for morphological rules that equidistant straight line makes micro-structure and material surface, adjust nanosecond
The power of laser equipment is 16W, pulse number is 3 and scanning speed is 500mm/s, carries out the scanning of first time nanosecond laser and adds
Work；
4) nanosecond laser equipment other parameters are constant, and adjustment scanning speed is 1000mm/s, carry out second of nanosecond laser
Scanning machining；
5) process finishing；
Step 3: laser ablation aluminum alloy specimen obtained in step 2 is cleaned by ultrasonic by post-processing with deionized water
5min removes surface residual debris；
Step 4: the laser ablation aluminum alloy specimen cleaned through step 3 is placed in and is air-dried at room temperature, is obtained with micro-nano
The super-hydrophobic aluminum alloy surface of compound double mesostructures.
The size of sample for the aluminium alloy that the present invention uses is 20 × 20 × 2mm.
Drawing the straight line spacing of equidistant straight line in step 2 at nanosecond laser equipment operation interface is 50 microns.
Referring to attached drawing 2, specimen surface micro-structure is observed using electronic scanner microscope.
Referring to attached drawing 3 and attached drawing 4, surface of test piece wetability is observed using deionized water, present invention system will be used
The static contact angle of standby aluminum alloy surface and the static contact angle of unprocessed aluminium alloy surface of test piece compare:
7075 aluminium alloy test specimens after polishing on polishing machine are taken, parallel samples are 5, and the droplet size of deionized water is
4 μ l are measured using video optics static contact angle measuring instrument, and measurement result is averaged, and obtains 7075 aluminum alloy surfaces
Static contact angle be 76.4 °.
Test specimen after taking nanosecond laser to process carries out Static Contact angular measurement, and parallel samples are 5, micro-structure longitudinal direction depth
Range is between 25-35 μm, and for the width of recess between 34-36 μm, static contact angle has been up to 154.36 °.
Claims (8)
1. the nanosecond laser rescan preparation method of aluminum alloy surface superhydrophobic microstructure, which is characterized in that including following step
It is rapid:
Step 1: pretreatment polishes aluminum alloy specimen on polishing machine using sand paper, and clear using deionized water ultrasound
It washes, removes remained on surface clast, be placed in and air-dry at room temperature；
Step 2: carrying out nanosecond laser etching processing for the aluminum alloy specimen being cleaned by ultrasonic in step 1, specifically:
1) aluminum alloy specimen being cleaned by ultrasonic in step 1 is placed in the machine table of nanosecond laser equipment；
2) focal plane of adjustment nanosecond laser equipment processing makes the focal plane of processing and aluminum alloy specimen upper surface be in same flat
Face；
3) equidistant straight line is drawn at nanosecond laser equipment operation interface, straight line spacing is set as 50~100 microns, and adjustment is received
Power, pulse number and the scanning speed of second laser equipment numerical value to needed for testing, carry out first time nanosecond laser scanning machining；
4) adjustment scanning speed carries out second of nanosecond laser scanning machining；
5) process finishing；
Step 3: laser ablation aluminum alloy specimen obtained in step 2 is cleaned by ultrasonic by post-processing with deionized water, removes table
Face residue；
Step 4: the laser ablation aluminum alloy specimen cleaned through step 3 is placed in and is air-dried at room temperature, is obtained compound with micro-nano
Double mesostructures super-hydrophobic aluminum alloy surface.
2. the nanosecond laser rescan preparation method of aluminum alloy surface superhydrophobic microstructure according to claim 1,
It is characterized in that, it is described in step 1 to polish aluminum alloy specimen using sand paper on polishing machine specifically: aluminium alloy examination
Sample is successively polished using the sand paper of model 400#, 600#, 1000# and 2000# on polishing machine.
3. the nanosecond laser rescan preparation method of aluminum alloy surface superhydrophobic microstructure according to claim 1 or 2,
It is characterized in that, described in step 1 polish aluminum alloy specimen on polishing machine using sand paper, the test specimen after polishing
Surface roughness Ra < 0.22 μm.
4. the nanosecond laser rescan preparation method of aluminum alloy surface superhydrophobic microstructure according to claim 1,
It is characterized in that, the time for using deionized water to be cleaned by ultrasonic in step 1 is 5min.
5. the nanosecond laser rescan preparation method of aluminum alloy surface superhydrophobic microstructure according to claim 1,
It is characterized in that, numerical value needed for test described in step 2 specifically: power 16W, pulse number 3, scanning speed
500mm/s。
6. the nanosecond laser rescan preparation method of aluminum alloy surface superhydrophobic microstructure according to claim 1,
It is characterized in that, second of nanosecond laser scanning machining scanning speed is adjusted to 1000mm/s in step 2.
7. the nanosecond laser rescan preparation method of aluminum alloy surface superhydrophobic microstructure according to claim 1,
It is characterized in that, the time for using deionized water to be cleaned by ultrasonic in step 3 is 5min.
8. the nanosecond laser rescan preparation method of aluminum alloy surface superhydrophobic microstructure according to claim 1,
It is characterized in that, drawing the straight line spacing of equidistant straight line in step 2 at nanosecond laser equipment operation interface is 50 microns.
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| CN109279571A (en) * | 2018-09-19 | 2019-01-29 | 山东大学 | A kind of hydrophobic surface micro-structure and preparation method |
| CN111468831A (en) * | 2019-01-23 | 2020-07-31 | 中国科学院长春光学精密机械与物理研究所 | Self-cleaning metal surface, preparation method thereof and processing device |
| CN109881192A (en) * | 2019-01-25 | 2019-06-14 | 华南理工大学 | A kind of bionical adherent surfaces and preparation method thereof |
| CN109865949B (en) * | 2019-04-04 | 2021-11-16 | 重庆新西亚铝业(集团)股份有限公司 | Aluminum alloy surface hydrophobic treatment process |
| CN110607492A (en) * | 2019-10-29 | 2019-12-24 | 江苏理工学院 | Method for improving super-hydrophobic performance of aluminum alloy |
| CN110653493B (en) * | 2019-10-31 | 2020-08-14 | 山东大学 | Preparation method of super-hydrophobic micro-nano structure on surface of stainless steel |
| CN112536205A (en) * | 2020-12-03 | 2021-03-23 | 长春理工大学 | Low-cost ultrasonic-assisted conversion method for converting underwater super oleophilic property into super oleophobic property |
| CN112975134A (en) * | 2021-02-09 | 2021-06-18 | 中国科学院上海光学精密机械研究所 | Method for reducing metal pollutant generation induced by laser irradiation |
| CN113146051B (en) * | 2021-04-23 | 2022-05-13 | 吉林大学 | High-flexibility preparation method of large-area microstructure on surface of amorphous alloy |
| CN113579480B (en) * | 2021-07-29 | 2023-06-16 | 湖北工业大学 | Preparation method of composite structure for reducing light reflectivity of titanium alloy surface |
| CN113732512B (en) * | 2021-09-14 | 2023-11-28 | 武汉锐科光纤激光技术股份有限公司 | Method and device for manufacturing anti-reflection material |
| CN114178795B (en) * | 2021-12-16 | 2023-05-23 | 常州大学 | Preparation method of anisotropic super-hydrophobic surface of metal material |
| CN114682922B (en) * | 2022-03-08 | 2023-03-21 | 江苏大学 | Method for regulating and controlling super-hydrophobic surface stress and texture morphology of aluminum alloy prepared by laser etching |
| CN114769623B (en) * | 2022-06-20 | 2022-09-02 | 吉林大学 | Preparation method for manufacturing NiTi alloy super-hydrophilic surface by additive manufacturing |
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