CN102127789A - AM60 magnesium alloy surface heavy-layer treatment method - Google Patents
AM60 magnesium alloy surface heavy-layer treatment method Download PDFInfo
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- CN102127789A CN102127789A CN 201110101490 CN201110101490A CN102127789A CN 102127789 A CN102127789 A CN 102127789A CN 201110101490 CN201110101490 CN 201110101490 CN 201110101490 A CN201110101490 A CN 201110101490A CN 102127789 A CN102127789 A CN 102127789A
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Abstract
The invention discloses an AM60 magnesium alloy surface heavy-layer treatment method, belonging to the research field of AM60 magnesium alloy surface heavy-layer treatment. On the basis of alternating current plasma microarc oxidation treatment method, oxygen gas is sprayed into treatment solution to enhance and improve the sintering effect on a protective layer, and the AM60 magnesium alloy is subjected to alternating current plasma microarc oxidation treatment for 119-149 seconds in the following conditions: potassium fluoride concentration is 406-408 g/L, potassium hydroxide concentration is 188-190 g/L, power frequency alternating voltage is 114-116 V, amount of oxygen gas sprayed per liter treatment solution is 0.01-0.016 L/s, thereby forming an uniform thick protective layer with thickness of 55-65 mum and compact texture on the surface of AM60 magnesium alloy.
Description
Technical field
The present invention relates to a kind of AM60 Mg alloy surface thick-layer treatment process.
Background technology
Publication number: CN1900383A; denomination of invention: on " a kind of AZ91 surface treatment method of Mg alloy "; set forth AZ91 magnesium alloy ac plasma differential arc oxidation treatment method; promptly; employing contains the treatment solution of Potassium monofluoride and potassium hydroxide; power frequency AC by voltate regulator control provides electric energy; in cycle, utilize the yin, yang ion in the treatment solution to carry out the TRANSIENT HIGH TEMPERATURE of plasma micro-arc discharge generation at the AZ91 Mg alloy surface at each power frequency ac voltage at AZ91 Mg alloy surface formation protective layer.Utilize this ac plasma differential arc oxidation treatment method; disclosed Potassium monofluoride concentration is that 500～979g/L, concentration of potassium hydroxide are that 300～349g/L, power frequency ac voltage are under 68～80V condition in patent CN1900383A; can be in 60～90 seconds, make that AZ91 Mg alloy surface growth in situ goes out that 15～30 μ m are thick, homogeneous microstructure and complete protective layer.
The AM60 magnesium alloy is to contain aluminium 6wt%; the magnesium alloy that contains manganese 0.27wt%; under the disclosed treatment condition of CN1900383A patented method; it is thick to make AM60 Mg alloy surface growth in situ go out 15～30 μ m in 80～110 seconds; homogeneous microstructure and complete protective layer; but; the thick-layer of thickness more than 30 μ m that adopts the CN1900383A patented method to form at the AM60 Mg alloy surface; having comparatively serious desertification phenomenon is that the protective layer change is loose; play the phenomenon of pelletizing; the Mg alloy surface thick-layer of this appearance desertification phenomenon does not almost have provide protection to magnesium alloy substrate; that is to say that adopting the CN1900383A patented method is 30 μ m at the maximum ga(u)ge of the protective layer with provide protection of AM60 Mg alloy surface formation.
For the dense structure with provide protection, the uniform protection layer of AM60 Mg alloy surface, its thickness is big more, and is strong more, lasting more to the provide protection of matrix, and therefore, the sealer of AM60 magnesium alloy is the bigger the better at the thickness that occurs before the desertification phenomenon.
Summary of the invention
Technical problem to be solved by this invention is; overcome the deficiency of existing ac plasma differential arc oxidation treatment method " dense structure, the sealer maximum ga(u)ge is little uniformly "; provide a kind of and can further improve the maximum ga(u)ge of AM60 Mg alloy surface thick-layer at the ac plasma differential arc oxidation treatment method of the densification of AM60 Mg alloy surface formative tissue, uniform thick protective layer with provide protection.
The technical solution adopted for the present invention to solve the technical problems is: on ac plasma differential arc oxidation treatment method basis; in treatment solution, spray into oxygen to strengthen and to improve nodulizing to protective layer; and be that 406～408g/L, concentration of potassium hydroxide are that 188～190g/L, power frequency ac voltage are that 114～116V, every liter of treatment solution oxygen straying quatity are under 0.01～0.016L/s condition in Potassium monofluoride concentration, the AM60 magnesium alloy is carried out 119～149 seconds ac plasma Microarc Oxidation Surface Treatment.
The invention has the beneficial effects as follows: when magnesium alloy is carried out surface treatment; sealer for magnesium alloy; after it reaches certain thickness; under ion disruptive discharge in treatment solution is impacted; can produce and become desertification phenomenon loose, that play pelletizing rapidly; the generation of phenomenon of wanting to postpone to desertify promptly further improves the maximum ga(u)ge of the surperficial thick-layer with provide protection, must strengthen and improve the nodulizing to protective layer.If when carrying out surface treatment, in treatment solution, spray into oxygen; then the high temperature that produces during the ion disruptive discharge in the treatment solution can cause the oxygen that sprays in the treatment solution to form a large amount of oxygen plasmas; these oxygen plasmas have the nodulizing of helping to protective layer; can strengthen and improve nodulizing greatly to protective layer; the present invention utilizes the help nodulizing of the oxygen plasma of each surface treatment parameter optimization combination back generation to protective layer; postponed the generation of desertification phenomenon, further increased the maximum ga(u)ge of surperficial thick-layer with provide protection.Utilize the present invention, the AM60 magnesium alloy is carried out surface treatment, can in 119～149 seconds, obtain the thick dense structure of 55～65 μ m, uniform thick protective layer, thickened 83% at least than the maximum ga(u)ge 30 μ m that adopt the CN1900383A patented method to obtain.
Description of drawings
Fig. 1 carries out the front view of surface processing device to the AM60 magnesium alloy for the inventive method.
Among the figure, power frequency AC 1, lead 2, voltate regulator 3, lead 4, AM60 magnesium alloy workpiece 5, treatment solution 6, oxygen jet 7, oxygen pump 8, treatment trough 9.
Fig. 2 is the microtexture at the processing interface of adopting the inventive method that the AM60 magnesium alloy is carried out to obtain after the surface treatment.
Embodiment
It is as follows in conjunction with the accompanying drawings the inventive method to be carried out specifying of surface processing device to the AM60 magnesium alloy:
The AM60 magnesium alloy is carried out surface processing device mainly to be comprised: power frequency AC 1, voltate regulator 3, oxygen jet 7, oxygen pump 8, treatment trough 9.
The input terminus of voltate regulator 3 links to each other by lead 2 with power frequency AC 1, and the output terminal of voltate regulator 2 links to each other by lead 4 with AM60 magnesium alloy workpiece 5.Oxygen jet 7 adopts the teflon seal mode of connection to be fixed on the bottom of treatment trough 9, and the one end stretches in the treatment solution 6, and the other end links to each other with oxygen pump 8.
Power frequency AC 1 is an industry power frequency AC commonly used.Voltate regulator 3 can adopt the Mg alloy surface of buying on the market that can provide to handle the voltate regulator of any model of required electric energy.Oxygen jet 7 is a tetrafluoroethylene with the material of treatment trough 9.AM60 magnesium alloy workpiece 5 need carry out oil removing, polishing and cleaning pre-treatment.
A kind of AM60 Mg alloy surface thick-layer treatment process, adopt the ac plasma differential arc oxidation treatment method that the AM60 magnesium alloy is carried out surface treatment, in treatment solution, spray into oxygen carrying out preceding 1 minute of surface treatment beginning, and be that 406～408g/L, concentration of potassium hydroxide are that 188～190g/L, power frequency ac voltage are that 114～116V, every liter of treatment solution oxygen straying quatity are under 0.01～0.016L/s condition in Potassium monofluoride concentration, the AM60 magnesium alloy is carried out 119～149 seconds ac plasma Microarc Oxidation Surface Treatment.
Embodiment one; in Potassium monofluoride concentration is that 406g/L, concentration of potassium hydroxide are that 188g/L, power frequency ac voltage are that 114V, every liter of treatment solution oxygen straying quatity are under the 0.01L/s condition; after the ac plasma Microarc Oxidation Surface Treatment 119 seconds, can form the thick dense structure of 55 μ m, uniform thick protective layer at the AM60 magnesium alloy work-piece surface.
Embodiment two; in Potassium monofluoride concentration is that 406g/L, concentration of potassium hydroxide are that 188g/L, power frequency ac voltage are that 116V, every liter of treatment solution oxygen straying quatity are under the 0.01L/s condition; after the ac plasma Microarc Oxidation Surface Treatment 119 seconds, can form the thick dense structure of 58 μ m, uniform thick protective layer at the AM60 magnesium alloy work-piece surface.
Embodiment three; in Potassium monofluoride concentration is that 408g/L, concentration of potassium hydroxide are that 188g/L, power frequency ac voltage are that 114V, every liter of treatment solution oxygen straying quatity are under the 0.016L/s condition; after the ac plasma Microarc Oxidation Surface Treatment 149 seconds, can form the thick dense structure of 62 μ m, uniform thick protective layer at the AM60 magnesium alloy work-piece surface.
Embodiment four; in Potassium monofluoride concentration is that 408g/L, concentration of potassium hydroxide are that 190g/L, power frequency ac voltage are that 116V, every liter of treatment solution oxygen straying quatity are under the 0.016L/s condition; after the ac plasma Microarc Oxidation Surface Treatment 149 seconds, can form the thick dense structure of 65 μ m, uniform thick protective layer at the AM60 magnesium alloy work-piece surface.
Embodiment five; in Potassium monofluoride concentration is that 406g/L, concentration of potassium hydroxide are that 190g/L, power frequency ac voltage are that 116V, every liter of treatment solution oxygen straying quatity are under the 0.016L/s condition; after the ac plasma Microarc Oxidation Surface Treatment 119 seconds, can form the thick dense structure of 59 μ m, uniform thick protective layer at the AM60 magnesium alloy work-piece surface.
As seen; in Potassium monofluoride concentration is that 406～408g/L, concentration of potassium hydroxide are that 188～190g/L, power frequency ac voltage are that 114～116V, every liter of treatment solution oxygen straying quatity are under 0.01～0.016L/s condition; the AM60 magnesium alloy is carried out 119～149 seconds ac plasma Microarc Oxidation Surface Treatment, can form thick dense structure, the uniform thick protective layer of 55～65 μ m at the AM60 Mg alloy surface.
Accompanying drawing 2 is the microtexture at the processing interface of adopting the inventive method that the AM60 magnesium alloy is carried out to obtain after the surface treatment.The zone that the figure middle and upper part is light color is a protective layer, and it is the AM60 magnesium alloy substrate that the bottom is dark zone, and as seen, organizing of thick protective layer is very fine and close, even.As seen, the present invention can form the bigger thick protective layer of thickness at the AM60 Mg alloy surface.
Claims (1)
1. AM60 Mg alloy surface thick-layer treatment process, adopt the ac plasma differential arc oxidation treatment method that the AM60 magnesium alloy is carried out surface treatment, it is characterized in that, in treatment solution, spray into oxygen carrying out preceding 1 minute of surface treatment beginning, and be that 406～408g/L, concentration of potassium hydroxide are that 188～190g/L, power frequency ac voltage are that 114～116V, every liter of treatment solution oxygen straying quatity are under 0.01～0.016L/s condition in Potassium monofluoride concentration, the AM60 magnesium alloy is carried out 119～149 seconds ac plasma Microarc Oxidation Surface Treatment.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101014900A CN102127789B (en) | 2011-04-22 | 2011-04-22 | AM60 magnesium alloy surface heavy-layer treatment method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101014900A CN102127789B (en) | 2011-04-22 | 2011-04-22 | AM60 magnesium alloy surface heavy-layer treatment method |
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| CN102127789A true CN102127789A (en) | 2011-07-20 |
| CN102127789B CN102127789B (en) | 2012-06-27 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5554594A (en) * | 1978-10-12 | 1980-04-21 | Tanaka Kenji | Anodic oxidation treating method of magnesium and magnesium alloy |
| WO2001081658A1 (en) * | 2000-04-26 | 2001-11-01 | Jacques Beauvir | Oxidising electrolytic method for obtaining a ceramic coating at the surface of a metal |
| CN1730726A (en) * | 2005-07-01 | 2006-02-08 | 北京交通大学 | Magnesium alloy portable computer external surface treatment method |
| CN1900382A (en) * | 2006-07-05 | 2007-01-24 | 北京交通大学 | MB8 magnesium alloy surface treatment method |
| CN1900383A (en) * | 2006-07-05 | 2007-01-24 | 北京交通大学 | AZ91 magnesium alloy surface treating method |
-
2011
- 2011-04-22 CN CN2011101014900A patent/CN102127789B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5554594A (en) * | 1978-10-12 | 1980-04-21 | Tanaka Kenji | Anodic oxidation treating method of magnesium and magnesium alloy |
| WO2001081658A1 (en) * | 2000-04-26 | 2001-11-01 | Jacques Beauvir | Oxidising electrolytic method for obtaining a ceramic coating at the surface of a metal |
| CN1730726A (en) * | 2005-07-01 | 2006-02-08 | 北京交通大学 | Magnesium alloy portable computer external surface treatment method |
| CN1900382A (en) * | 2006-07-05 | 2007-01-24 | 北京交通大学 | MB8 magnesium alloy surface treatment method |
| CN1900383A (en) * | 2006-07-05 | 2007-01-24 | 北京交通大学 | AZ91 magnesium alloy surface treating method |
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