CN109702346A - A kind of laser surface pre-treating method improving interface bond strength - Google Patents
A kind of laser surface pre-treating method improving interface bond strength Download PDFInfo
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- CN109702346A CN109702346A CN201910017092.7A CN201910017092A CN109702346A CN 109702346 A CN109702346 A CN 109702346A CN 201910017092 A CN201910017092 A CN 201910017092A CN 109702346 A CN109702346 A CN 109702346A
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- microvia
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- interface bond
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Abstract
The invention discloses a kind of laser surface pre-treating methods for improving interface bond strength, key step includes: workpiece after over cleaning, workpiece surface to be processed is scanned by certain direction using pulsed light beam, forms inclined Microvia array different from plummet angular separation and with certain depth in workpiece surface.The beneficial effects of the invention are as follows process a series of mutually different inclination Microvia of angles in workpiece surface with pulse laser, penetrate into subsequent coating material inside Microvia, since there is Microvia certain depth and inclination angle constantly to change, coating material can be prevented to remove from workpiece surface in a plurality of directions, to increase substantially the interface bond strength of coating and workpiece surface.
Description
Technical field
The present invention relates to technical field of laser processing, especially a kind of laser surface pre-treatment for improving interface bond strength
Method.
Background technique
In order to improve the wear-resisting of product, high temperature resistant, corrosion-resistant finishes and the Interface adhesive strength of matrix, it will usually coat
Texturing is carried out to matrix surface before functional coating, by changing surface topography and roughness etc. to improve functional coating with
The interface bond strength of matrix, thus the service life of extension function coating.Current manual polishing and mechanical rubbing method exists
The texturing effect that matrix surface obtains is limited, is extremely difficult to the higher and higher requirement of coating.The micro- texture conduct of laser surface
A kind of novel process for treating surface has contactless, excellent Surface Texture control ability etc., is highly suitable as a kind of hair
Change technology is applied to produce.However, the micro- texture technology in present laser surface still has the promotion effect of interface bond strength
Limit, needs further to improve texturing technique, to improve the interface bond strength between coating and matrix.
Summary of the invention
Frosting treatment is carried out to work surface using pulse laser the technical problem to be solved in the present invention is to provide a kind of
Raising interface bond strength laser surface pre-treating method.
In order to solve the above technical problems, the present invention is achieved by the following technical solutions: a kind of raising interface cohesion is strong
The laser surface pre-treating method of degree, comprising the following steps:
Step 1, clean workpiece to be processed, remove workpiece surface dirt and oxide layer, if workpiece it is to be processed region it is long
Degree is w, width h；
Step 2, it is different to process angle to workpiece surface to be processed for the pulsed laser irradiation issued with laser
Inclination Microvia；
If the square area that the scanning work range that pulse laser reaches workpiece surface through galvanometer system is l × l, laser
The diameter of hot spot is D, and lateral distance is a1 between laser spot center, fore-and-aft distance a2, the coke of focus lamp in galvanometer system
Away from for f；
The scanning work range of galvanometer system is divided into the identical small square region of 9 areas of side length d=l/3
Domain, wherein the small square on four angles is respectively top left region s1, right regions s2, lower left region s3 and lower right area s4；
Laser facula is respectively 10~60 μm in s1, s2, s3 and s4 scanned in regions formation diameter and depth is 20~100
μm Microvia array, the column pitch of Microvia is a1, line space a2, and the axis of Microvia is also angled with plummet direction to be
θ, θ are acute angle；
Step 3, the region translation distance d for scanning workpiece not to pulse laser along the direction w by numerical control table, NC table, after
Continuous scanning top left region s1, right regions s2, lower left region s3 and lower right area s4, repetitive operation are made until scanning along the direction w
Standby Microvia；
Step 4, the region translation distance d not scanned workpiece to pulse laser along the direction h by numerical control table, NC table, then
It is carried out according to the scanning mode in step 3 until workpiece whole surface completes the preparation of inclination Microvia.
Be further arranged to: the column pitch a1 between Microvia described in step 2 is 20~150 μm, and line space a2 is 20
~150 μm.
It is further arranged to: the angle of the axis and workpiece surface of top left region s1 and the Microvia in the lower left region region s3
The variation range of θ isThe axis of right regions s1 and the Microvia in the region lower right area s3
The variation range of the angle, θ of line and workpiece surface is
Be further arranged to: the scanning work range of galvanometer system is 3cm × 3cm~15cm × 15cm.
The beneficial effects of the invention are as follows process a series of mutually different inclination of angles in workpiece surface with pulse laser
Microvia penetrates into subsequent coating material inside Microvia, due to Microvia have certain depth and inclination angle it is continuous
Variation can prevent coating material from removing from workpiece surface, to increase substantially coating and workpiece surface in a plurality of directions
Interface bond strength, extend the service life of coating；It is the method simple process, easy to operate, high-efficient, environmentally protective,
And technological parameter is easy to control, it is easy to accomplish industrial application.
Detailed description of the invention
Fig. 1 is the laser surface pre-treating technology schematic device for improving interface bond strength；
Fig. 2 is Microvia surface distribution map；
Fig. 3 is single laser scanning area；
Fig. 4 is entire workpiece surface Laser Scanning schematic diagram；
Fig. 5 is surface coating coating effect；
In figure, 1, laser；2, pulse laser；3, galvanometer system；4, workpiece；41, Microvia；5, numerical control table, NC table；6,
Coating.
Specific embodiment
In order to which technical solution of the present invention is more clearly understood, with reference to the accompanying drawings and embodiments, to the present invention make into
One step is described in detail.It should be appreciated that described herein, specific examples are only used to explain the present invention, is not used to limit this hair
It is bright.
Referring to figs. 1 to Fig. 5, the present invention provides a kind of laser surface pre-treating method for improving interface bond strength, below
The illustration present invention.
Laser can use femtosecond pulse laser, picosecond pulse laser or nanosecoud pulse laser.This implementation
Workpiece material to be processed is high-temperature nickel-base alloy, coating material ZrO in example2。
The machined parameters of the laser of use are as follows: pulsewidth 100fs, repetition rate 100KHZ, wavelength 1064nm, single pulse energy
Measure 1mj, 15 μm of spot diameter after focusing.Region to be processed is the square area of 4cm × 4cm, galvanometer system scanning range
For 3cm × 3cm, the focal length of focus lamp is 10cm in galvanometer system.
Including following operating procedure:
Step 1, first pickling workpiece to be processed, then it is cleaned by ultrasonic workpiece to be processed, remove workpiece surface dirt and oxygen
Change layer；
Step 2, it is well placed workpiece, the pulsed light beam that laser issues is scanned since the lower right corner of workpiece.Pulsed light beam
Top left region s1, right regions s2, lower left region s3 and lower right area s4 are scanned, each region is 1cm × 1cm, and forming diameter is
The Microvia array that 10~60 μm and depth are 20~100 μm, column pitch and line space are 50 μm, axis horizontal by
67 °~82 ° and 98 °~113 ° of Microvia array.
Step 3, workpiece translation distance 1cm to the left is made by numerical control table, NC table, continues to scan on top left region s1, right regions
S2, lower left region s3 and lower right area s4, repetitive operation until transversely scanning prepare Microvia.
Step 4, workpiece is translated up by distance 1cm by numerical control table, NC table, continues to scan on top left region s1, right regions
S2, lower left region s3 and lower right area s4 continue to scan on top left region according still further to the scanning mode in step 3 to right translation 1cm
S1, right regions s2, lower left region s3 and lower right area s4, until workpiece whole surface completes the preparation of inclination Microvia.
After laser surface pre-treatment, use supersonic flame spraying method in workpiece surface coating thickness for 180 μm
ZrO2Coating, the parameter of supersonic flame spraying are as follows: powder sending quantity 30g/min, particle rapidity 560m/s.Through detecting, identical
Use condition under, using laser surface pre-treating method of the present invention and the coating of supersonic flame spraying, than using conventional hair
After chemical industry skill and the service life of the coating of supersonic flame spraying improves 3.3 times, can effectively improve laser treatment interface
Bond strength.
Above embodiments are only explanation of the invention, are not limitation of the present invention, for the general of this field
For logical technical staff, without departing from the principle of the present invention, various modifications and improvements can be made, these are belonged to
Protection scope of the present invention, therefore the scope of protection of the patent of the present invention should be subject to the claims.
Claims (4)
1. a kind of laser surface pre-treating method for improving interface bond strength, it is characterised in that the following steps are included:
Step 1, it cleans workpiece to be processed, removes workpiece surface dirt and oxide layer, if workpiece zone length to be processed is
W, width h；
Step 2, the pulsed laser irradiation issued with laser processes that angle is mutually different to incline to workpiece surface to be processed
Oblique Microvia；
If the square area that the scanning work range that pulse laser reaches workpiece surface through galvanometer system is l × l, laser facula
Diameter be D, lateral distance is a1 between laser spot center, fore-and-aft distance a2, and the focal length of focus lamp is in galvanometer system
f；
The scanning work range of galvanometer system is divided into the identical small square area of 9 areas of side length d=l/3,
Wherein the small square on four angles is respectively top left region s1, right regions s2, lower left region s3 and lower right area s4；
Laser facula is respectively 10~60 μm in s1, s2, s3 and s4 scanned in regions formation diameter and depth is 20~100 μm
Microvia array, the column pitch of Microvia are a1, and line space a2, it is θ, θ that the axis of Microvia is also angled with plummet direction
For acute angle；
Step 3, the region translation distance d for scanning workpiece not to pulse laser along the direction w by numerical control table, NC table, continues to sweep
Top left region s1, right regions s2, lower left region s3 and lower right area s4 are retouched, repetitive operation along the scanning of the direction w until prepare micro-
Blind hole；
Step 4, the region translation distance d not scanned workpiece to pulse laser along the direction h by numerical control table, NC table, according still further to
Scanning mode in step 3 carries out until workpiece whole surface completes the preparation of inclination Microvia.
2. a kind of laser surface pre-treating method for improving interface bond strength according to claim 1, it is characterised in that:
Column pitch a1 between Microvia described in step 2 is 20~150 μm, and line space a2 is 20~150 μm.
3. a kind of laser surface pre-treating method for improving interface bond strength according to claim 1, it is characterised in that:
The variation range of the angle, θ of the axis and workpiece surface of top left region s1 and the Microvia in the lower left region region s3 isThe axis and workpiece surface of right regions s1 and the Microvia in the region lower right area s3
The variation range of angle, θ is
4. a kind of laser surface pre-treating method for improving interface bond strength according to claim 1, it is characterised in that:
The scanning work range of galvanometer system is 3cm × 3cm~15cm × 15cm.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113667922A (en) * | 2021-07-12 | 2021-11-19 | 吉林大学 | Plasma spraying Al/Al on magnesium alloy surface2O3Method for producing a coating |
| CN114603259A (en) * | 2022-01-20 | 2022-06-10 | 维达力实业（赤壁）有限公司 | Method for treating surface of curtain coating cover plate |
| CN114939727A (en) * | 2022-05-23 | 2022-08-26 | 蔚来汽车科技(安徽)有限公司 | Laser surface treatment method and laser surface treatment station |
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| CN113667922A (en) * | 2021-07-12 | 2021-11-19 | 吉林大学 | Plasma spraying Al/Al on magnesium alloy surface2O3Method for producing a coating |
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Application publication date: 20190503 |
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