CN107164711A - A kind of method that short-pulse laser improves Mg alloy surface corrosion resistance - Google Patents
A kind of method that short-pulse laser improves Mg alloy surface corrosion resistance Download PDFInfo
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- CN107164711A CN107164711A CN201710244068.8A CN201710244068A CN107164711A CN 107164711 A CN107164711 A CN 107164711A CN 201710244068 A CN201710244068 A CN 201710244068A CN 107164711 A CN107164711 A CN 107164711A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/06—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon
Abstract
The present invention relates to a kind of method that short-pulse laser improves Mg alloy surface corrosion resistance：Step (1), magnesium alloy materials are carried out with sand paper polishing remove removing oxide layer, it is rear to carry out acetone cleaning and deoils；Step (2), the magnesium alloy materials after cleaning are placed on the workbench of nanosecond laser system of processing, set laser parameter, start laser-processing system, laser is strafed on magnesium alloy materials surface with certain speed using vibration mirror scanning, finally obtain remelted layer on surface；Step (3), to after processing metal material carry out easy clean.The inventive method utilizes laser direct writing system, metal surface consolidation depth, area etc. can accurately be controlled by changing laser parameter such as frequency, sweep speed, power；Chemical reagent, environmental protection need not additionally be added；Any setting of machining area can be realized；Process velocity faster, improves production efficiency；Using the short-pulse laser of smaller power, metallic matrix performance is helped to maintain constant.
Description
Technical field
The present invention relates to a kind of method that short-pulse laser improves Mg alloy surface corrosion resistance.This method extensively can should
For the surface treatment of magnesium alloy materials, the quick metal surface for obtaining more preferably corrosion resistance is handled using laser remolten.
Background technology
Magnesium alloy has the advantages that small density, specific strength and specific stiffness is high, easy to process, aboundresources, in automobile, electronics
And the field such as Aero-Space has broad application prospects.But, the electrode potential of magnesium alloy is low, easily corrosion, corrosion resistance
Difference is to hinder one of main bottleneck of magnesium alloy popularization and application.The conjunction for effectively improving corrosion resistance of magnesium alloy energy is not yet found at present
Aurification method, improves its corrosion resistance and mainly uses at the surfaces such as chemical composition coating, anodic oxidation, plating, differential arc oxidation, thermal spraying
Reason technology.In the chemical pretreatment solution that chemical composition coating is often used containing Cr VI etc. it is harmful and pollution environment element,
The Chrome-free chemical composition coating technique of magnesium alloy is still in conceptual phase.Anode oxidation process process water, electric consumption are very big, simultaneously
Sulfuric acid and other liguid organic solvents have larger pollution to water and air.Plating is because magnesium electrode current potential is very low, pre-treating method
Requirement it is high, and contain heavy metal in plating solution, influence the recycling of magnesium alloy, add the difficulty and cost of recovery.
Micro-arc oxidation device voltage request is higher, and safety precautions is carried out during operation；And electrolyte temperature rises comparatively fast, need to match somebody with somebody
The refrigeration and heat-exchange apparatus of standby larger capacity.The combination of hot-spraying technique floating coat and matrix is mainly physical mechanical combination,
Bond strength is not high, the problems such as the causing utilization efficiency of coatings decline and dust while spraying is dispersed.
And laser remolten processing is as a kind of increasingly mature novel surface treatment technology, with operate it is flexible, pollution-free,
The features such as selectively being modified to parts locally surface, this technique inward nature is the thermal effect of laser scanning process
Material surface remelting should be caused.In laser re-melting process, constituent selective evaporation because of boiling point difference in molten metal,
Other elements relative amount is caused in magnesium alloy to improve, and material skin temperature in laser processing procedure rises sharply rapid drawdown, gold
Grain structure is refined after category material solidification, and the component segregation of alloy is also reduced, and which thereby enhances Mg alloy surface
Decay resistance.In addition the high controllability of laser is had benefited from, by accurately adjusting laser output parameter, laser remolten technique can be with
Adapt to different magnesium alloy materials and process and control material character change caused by technique.But existing laser melts processing again
Technology, it is big to the matrix material heat affecting outside remelted layer metal, influence metallic matrix performance.
The content of the invention
It is an object of the invention to provide a kind of method that short-pulse laser improves Mg alloy surface corrosion resistance.This method
The surface treatment of all kinds of magnesium alloy parts is can be widely applied to, part is obtained more preferable decay resistance feature.
The method that a kind of short-pulse laser of the present invention improves Mg alloy surface corrosion resistance, its flow are as shown in figure 1, main
Comprise the following steps：
(1) magnesium alloy materials are carried out with sand paper polishing and removes removing oxide layer, rear progress acetone cleaning is deoiled.
(2) magnesium alloy materials after step (1) is cleaned are placed on the workbench of nanosecond laser system of processing, set laser
Parameter, is started laser-processing system, laser is strafed on magnesium alloy materials surface with certain speed using vibration mirror scanning, finally
Remelted layer is obtained on surface；
(3) easy clean is carried out to the metal material after processing.
Wherein, the laser parameter set in step (2) as：Optical maser wavelength is 193nm~1070nm, and laser pulse width is 50ns
~100 μ s, laser power is 10W~500W, and laser pulse frequency is 1kHz~1MHz, and beam spot scans Duplication is 20%-
80%；
Wherein, laser is made to be strafed on magnesium alloy materials surface with certain speed using vibration mirror scanning in step (2), its speed
For 20mm/s~3m/s.
The method that a kind of short-pulse laser disclosed by the invention improves Mg alloy surface corrosion resistance, is opened a kind of new
Metal surface corrosion resistance method is improved, metal surface regional area is heated at a relatively high temperature in moment using laser
And melt, heat absorption and conduction subsequently, by means of cold conditions metallic matrix, make the very thin coating metal rapid solidification melted,
Produce new superficial layer.Compared to existing relative to tradition such as chemical composition coating, anodic oxidation, plating, differential arc oxidation, thermal sprayings
Process of surface treatment and existing laser remolten technique, the advantage of the invention is that：
(1)：This method utilizes laser direct writing system, can be by changing laser parameter such as frequency, sweep speed, power pair
Metal surface consolidation depth, area etc. are accurately controlled, and can obtain machining accuracy and the range of work is much larger than existing reinforcing
Technique.
(2)：This method utilizes laser direct writing system, and working process is based on melt material and solidification, it is not necessary to extra addition
Chemical change does not occur in itself for chemical reagent, environmental protection, processed material, can be applied to various metals material.
(3)：This method can realize any setting of machining area, compared to chemical composition coating, anodic oxidation, plating,
Differential arc oxidation, thermal spraying etc. integral processing are more flexible.
(4)：This method process velocity faster, is expected in actual production improve production efficiency.
(5)：Relative to existing laser remolten method, the present invention uses the short-pulse laser of smaller power, to remelted layer
Matrix material heat affecting very little outside metal, helps to maintain metallic matrix performance constant.
Brief description of the drawings：
Fig. 1 show the inventive method flow chart.
Fig. 2 show the laser-processing system schematic diagram that the embodiment of the present invention is applied.
Fig. 3 show Mg alloy surface longitudinal section after embodiment 1 is laser machined.
Fig. 4 show embodiment 1 and laser machines front and rear magnesium alloy Electrochemical results.
Fig. 5 show embodiment 2 and laser machines front and rear magnesium alloy Electrochemical results.
Fig. 6 show embodiment 3 and laser machines front and rear magnesium alloy Electrochemical results.
Label is as follows in figure：
1st, laser 2, X galvanometers 3, Y galvanometers 4, computer
5th, focus lamp 6, protection gas 7, workbench
Embodiment：
Below in conjunction with the accompanying drawings and specific embodiment, the invention will be further described.
The flow of the present invention " a kind of method that short-pulse laser improves Mg alloy surface corrosion resistance " is as shown in figure 1, main
Comprise the following steps：
(1) magnesium alloy materials are carried out with sand paper polishing successively and removes removing oxide layer, rear progress acetone cleaning is deoiled.
(2) magnesium alloy materials after step (1) is cleaned are placed on the workbench of nanosecond laser system of processing, set laser
Parameter, is started laser-processing system, laser is strafed on magnesium alloy materials surface with certain speed using vibration mirror scanning, finally
Remelted layer is obtained on surface；
(3) easy clean is carried out to the metal material after processing.
Wherein, the laser parameter set in step (2) as：Optical maser wavelength is 193nm~1070nm, and laser pulse width is 50ns
~100 μ s, laser power is 10W~500W, and laser pulse frequency is 1kHz~1MHz；
Wherein, laser is made to be strafed on magnesium alloy materials surface with certain speed using vibration mirror scanning in step (2), its speed
For 20mm/s~3m/s, beam spot scans Duplication is 20%~80%.
The equipment that the embodiment of the present invention is applied is the nanosecond laser system of processing of SPI companies, and it includes：Laser 1, X
Galvanometer 2, Y galvanometers 3, computer 4, focus lamp 5, protection gas 6 and workbench.As shown in Figure 2.
Embodiment 1：
(1) the Mg-Gd-Ca magnesium alloy blocks of 5mm thickness are taken, is polished with sand paper and removes the oxide-film of finished surface, be placed in nothing
Cleaned in water acetone.
(2) sample is placed in the nanosecond laser system of processing of SPI companies as shown in Figure 2 (using the CO of 1060nm wavelength2
Laser) workbench on, setting laser power be 70W, frequency is 500kHz, and sweep speed is 200mm/s, set scanning area
Domain size is 10mm × 10mm, and adjustment hot spot coincidence factor to 20% starts laser-processing system and starts processing.
(3) magnesium alloy block after processing is removed from workbench, is wiped and cleared up with absolute alcohol.
The longitudinal section metallographic of gained Mg-Gd-Ca magnesium alloy near surfaces after embodiment 1 is processed is illustrated in figure 3, by scheming institute
Show, there is the remelted layer of about 20 μm of thickness metal surface after being handled through short-pulse laser, and remelted layer shows different in matrix
Metallographic form.The electrode polarization for being illustrated in figure 4 gained Mg-Gd-Ca magnesium alloys and untreated samples after embodiment 1 is processed is bent
Line, shown in figure, alloy corrosion potential is increased relative to untreated samples after remelting, and decay resistance has been lifted.
Embodiment 2：
(1) the Mg-Gd-Ca magnesium alloy blocks of 5mm thickness are taken, sand paper polishing removes the oxide-film of finished surface, is placed in anhydrous
Cleaned in acetone.
(2) sample is placed in the nanosecond laser system of processing of SPI companies as shown in Figure 2 (using the CO2 of 1060nm wavelength
Laser) workbench on, setting laser power be 80W, frequency is 500kHz, and sweep speed is 50mm/s, set scanning area
Domain size is 10mm × 10mm, and hot spot coincidence factor is adjusted to 40%, starts laser-processing system and starts processing.
(3) magnesium alloy block after processing is removed from workbench, is wiped and cleared up with absolute alcohol.
Gained Mg-Gd-Ca magnesium alloys and the electrode polarization curve of untreated samples after embodiment 2 is processed are illustrated in figure 5,
Shown in figure, alloy corrosion potential is increased relative to untreated samples after remelting, and decay resistance has been lifted.
Embodiment 3：
(1) the ZK60 magnesium alloy blocks of 5mm thickness are taken, sand paper polishing removes the oxide-film of finished surface, is placed in anhydrous propanone
Middle cleaning.
(2) sample is placed in the nanosecond laser system of processing of SPI companies as shown in Figure 2 (using the CO2 of 1060nm wavelength
Laser) workbench on, setting laser power be 120W, frequency is 20kHz, and sweep speed is 50mm/s, set scanning area
Domain size is 10mm × 10mm, and hot spot coincidence factor is adjusted to 50%, starts laser-processing system and starts processing.
(3) magnesium alloy block after processing is removed from workbench, is wiped and cleared up with absolute alcohol.
Gained ZK60 magnesium alloys and the electrode polarization curve of untreated samples after embodiment 3 is processed are illustrated in figure 6, by scheming
Shown, alloy corrosion potential is increased relative to untreated samples after remelting, and decay resistance has been lifted.
Embodiment 4：
(1) the ZK60 magnesium alloy blocks of 5mm thickness are taken, sand paper polishing removes the oxide-film of finished surface, is placed in anhydrous propanone
Middle cleaning.
(2) sample is placed in the nanosecond laser system of processing of SPI companies as shown in Figure 2 (using the CO2 of 1060nm wavelength
Laser) workbench on, setting laser power be 150W, frequency is 800kHz, and sweep speed is 500mm/s, set scanning
Area size is 10mm × 10mm, and hot spot coincidence factor is adjusted to 60%, starts laser-processing system and starts processing.
(3) magnesium alloy block after processing is removed from workbench, is wiped and cleared up with absolute alcohol.
Embodiment 5：
(1) the AZ31 magnesium alloy blocks of 5mm thickness are taken, sand paper polishing removes the oxide-film of finished surface, is placed in anhydrous propanone
Middle cleaning.
(2) sample is placed in the nanosecond laser system of processing of SPI companies as shown in Figure 2 (using the CO2 of 1060nm wavelength
Laser) workbench on, setting laser power be 70W, frequency is 100kHz, and sweep speed is 20mm/s, set scanning area
Domain size is 10mm × 10mm, and hot spot coincidence factor is adjusted to 20%, starts laser-processing system and starts processing.
(3) magnesium alloy block after processing is removed from workbench, is wiped and cleared up with absolute alcohol.
Technological means disclosed in the present invention program is not limited only to the technological means disclosed in above-mentioned technological means, in addition to
Constituted technical scheme is combined by above technical characteristic.The scope of protection of present invention is defined with claims
Scope is defined.
Claims (1)
1. a kind of method that short-pulse laser improves Mg alloy surface corrosion resistance, is characterised by：This method mainly includes following
Step：
Step (1), magnesium alloy materials are carried out with sand paper polishing remove removing oxide layer, it is rear to carry out acetone cleaning and deoils；
Step (2), by step (1) clean after magnesium alloy materials be placed on the workbench of nanosecond laser system of processing, setting swash
Optical parameter, is started laser-processing system, laser is strafed on magnesium alloy materials surface with certain speed using vibration mirror scanning, most
Eventually remelted layer is obtained on surface；
Step (3), to after processing metal material carry out easy clean；
Wherein, the laser parameter set in step (2) as：Optical maser wavelength be 193nm~1070nm, laser pulse width be 50ns~
100 μ s, laser power is 10W~500W, and laser pulse frequency is 1kHz~1MHz, and beam spot scans Duplication is 20%-80%；
Wherein, laser is made to be strafed on magnesium alloy materials surface with certain speed using vibration mirror scanning in step (2), its speed is
20mm/s~3m/s.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108555437A (en) * | 2018-05-09 | 2018-09-21 | 北京航空航天大学 | A kind of laser processing of orientation regulation and control biomedical metal material superficial cell growth |
| CN108754372A (en) * | 2018-06-13 | 2018-11-06 | 北京航空航天大学 | A kind of laser processing method improving magnesium alloy biocompatibility |
| CN109811285A (en) * | 2019-01-21 | 2019-05-28 | 西安交通大学 | A method of improving Mg-10Li-3Al-3Zn magnesium lithium alloy corrosion resistance of surface |
| RU2691154C1 (en) * | 2018-11-08 | 2019-06-11 | Федеральное государственное автономное образовательное учреждение высшего образования "Белгородский государственный национальный исследовательский университет" (НИУ "БелГУ") | Method of forming a corrosion-resistant layer on the surface of magnesium deformable alloys |
| CN114774815A (en) * | 2022-05-10 | 2022-07-22 | 西南交通大学 | Laser melting process beneficial to improving wear resistance of alloy |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1986841A (en) * | 2006-11-03 | 2007-06-27 | 江苏大学 | Method of raising corrosion resistance of magnesium alloy based on reiforcing laser impact technology |
| CN104907699A (en) * | 2015-05-28 | 2015-09-16 | 湖北工业大学 | Method for preparing cast iron super-hydrophobic corrosion-resistant surface with short pulse laser light |
| CN104947016A (en) * | 2015-05-28 | 2015-09-30 | 湖北工业大学 | Method for preparing zinc alloy super-hydrophobic and self-cleaning surface by using ultra-short pulse laser |
| CN106148644A (en) * | 2016-08-24 | 2016-11-23 | 北京航空航天大学 | A kind of metallic hardfacing method of short-pulse laser |
-
2017
- 2017-04-14 CN CN201710244068.8A patent/CN107164711A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1986841A (en) * | 2006-11-03 | 2007-06-27 | 江苏大学 | Method of raising corrosion resistance of magnesium alloy based on reiforcing laser impact technology |
| CN104907699A (en) * | 2015-05-28 | 2015-09-16 | 湖北工业大学 | Method for preparing cast iron super-hydrophobic corrosion-resistant surface with short pulse laser light |
| CN104947016A (en) * | 2015-05-28 | 2015-09-30 | 湖北工业大学 | Method for preparing zinc alloy super-hydrophobic and self-cleaning surface by using ultra-short pulse laser |
| CN106148644A (en) * | 2016-08-24 | 2016-11-23 | 北京航空航天大学 | A kind of metallic hardfacing method of short-pulse laser |
Non-Patent Citations (1)
| Title |
|---|
| 何耀华等: "《汽车制造工艺》", 30 April 2012, 北京：机械工业出版社 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108555437A (en) * | 2018-05-09 | 2018-09-21 | 北京航空航天大学 | A kind of laser processing of orientation regulation and control biomedical metal material superficial cell growth |
| CN108754372A (en) * | 2018-06-13 | 2018-11-06 | 北京航空航天大学 | A kind of laser processing method improving magnesium alloy biocompatibility |
| RU2691154C1 (en) * | 2018-11-08 | 2019-06-11 | Федеральное государственное автономное образовательное учреждение высшего образования "Белгородский государственный национальный исследовательский университет" (НИУ "БелГУ") | Method of forming a corrosion-resistant layer on the surface of magnesium deformable alloys |
| CN109811285A (en) * | 2019-01-21 | 2019-05-28 | 西安交通大学 | A method of improving Mg-10Li-3Al-3Zn magnesium lithium alloy corrosion resistance of surface |
| CN114774815A (en) * | 2022-05-10 | 2022-07-22 | 西南交通大学 | Laser melting process beneficial to improving wear resistance of alloy |
| CN114774815B (en) * | 2022-05-10 | 2023-04-11 | 西南交通大学 | Laser melting process beneficial to improving wear resistance of alloy |
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Application publication date: 20170915 |