CN102513913A - Post treatment method for micro-arc oxidation of aluminum alloy - Google Patents
Post treatment method for micro-arc oxidation of aluminum alloy Download PDFInfo
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- CN102513913A CN102513913A CN201110376952XA CN201110376952A CN102513913A CN 102513913 A CN102513913 A CN 102513913A CN 201110376952X A CN201110376952X A CN 201110376952XA CN 201110376952 A CN201110376952 A CN 201110376952A CN 102513913 A CN102513913 A CN 102513913A
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Abstract
The invention belongs to the technical field of surface treatment, and relates to a post treatment method for micro-arc oxidation of aluminum alloy surface. The post treatment method comprises the steps of: filling grinding materials in the charging basket of a vibrating burnisher or a spiral-flow type burnisher, wherein the loading dosage of the grinding materials accounts for 1/2 to 3/4 of the volume of the charging basket, and the sizes of the grinding materials are 0.1-30 mm; and adding water to submerge 0-20 mm of grinding materials, and adding a grinding agent, a cleaning agent and a brightening agent, wherein the adding dosages are respectively 0.05-10% of the adding dosage of water, and the burnish processing duration is 0.5-100 h. The post treatment method of the invention has the advantages of combining the micro-arc oxidation technology with the traditional burnishing technology to prepare smooth micro-arc oxidation ceramic coating with high surface hardness and high quality while having no loose layer. Meanwhile, the burnishing technology has a low demand on the shapes of the to-be-treated parts and elements, so that the post treatment method of the invention can be used for treating aluminum alloy parts and elements with complex shapes.
Description
Technical field: the invention belongs to technical field of surface, relate to a kind of post-processing approach of aluminum alloy surface differential arc oxidation.
Background technology:
Aluminium alloy is because of its specific strength is high, specific stiffness is high and the aluminium element aboundresources becomes the second largest engineering material that current consumption is only second to steel.Because its excellent mechanical performance and physical property, aluminium alloy has been widely used for fields such as Aero-Space, machinery, electronics, automobile.But aluminum alloy hardness is low, and anti-wear performance is poor, and the characteristics such as poor corrosion resistance under severe environmental conditions are so the large-scale application of aluminium alloy be unable to do without corresponding process for treating surface.At present, the surface treatment method of aluminium alloy has chemical oxidation, anodic oxidation, plating, thermal spraying and differential arc oxidation, and wherein differential arc oxidization technique is at present to the most effective process for treating surface of aluminum metal.
Differential arc oxidization technique (Micro-arc Oxidation; MAO), be called again the plasma electrolysis liquid oxidation (Plasma electrolyte Oxidation, PEO); Broken through the limitation of anodic oxidation on voltage parameter; The plasma fortified effect that utilizes electrion to produce obtains hardness at matrix surface and reaches as high as 3000HV, maximum ga(u)ge 200 μ m～300 μ m; Insulaion resistance＞100M Ω; With the ceramic layer of matrix formation metallurgical binding, also have advantages such as electrical insulation capability is good, firm with matrix bond, less relatively to matrix influence fatigue life, environmentally safe, can increase substantially performance indications such as aluminium alloy, titanium alloy etc materials case hardness, corrosion resistance.Can be used for the surface treatment of aluminum alloy parts such as piston, motor, bearing; Utilize the good characteristics of corrosion resistance, can be used for aluminium alloy cylinder, impeller under the corrosive atmosphere, the preservative treatment of pipe fitting, connector part.The development of differential arc oxidization technique application facet Russia is very fast; Utilize differential arc oxidization technique to prepare wear-resisting, heat-resisting, anti-corrosion, hot erosion resistant coating; And initial success be applied to industry such as oil, weaving, Aero-Space, weapons, boats and ships; The surface modification that is used for some friction pairs that rotate at a high speed, pump housing seal face, plastic foil die mould, blast-furnace tuyere, gas nozzle, internal combustion engine part, blade of gas turbine etc. increases substantially their serviceability and life-span.But because the three-decker that existing differential arc oxidation film layer all is made up of bottom transition zone, middle compacted zone, outside weaker zone.And in practical application, use be in the middle of compacted zone; Outside weaker zone is because characteristics such as loose porous, compactness and hardness is all poor; Make the differential arc oxidation coating surface porosity, roughness is big, coefficient of friction is high, seriously hampers the practical engineering application process of differential arc oxidization technique.At present; The method of removing arc differential oxide ceramic layer surface porosity layer has the common sand paper of employing or the polishing of diamond sand paper and adopts grinding machine to grind; But these two kinds of methods are only applicable to the workpiece of simple shape such as dull and stereotyped and cylinder, can't handle for complex-shaped workpiece.
Summary of the invention
The objective of the invention is to propose a kind of post-processing approach of aluminum alloy differential arc oxidation that can carry out the post processing of differential arc oxidation to complex-shaped surface of the work.Technical solution of the present invention is, abrasive material is packed in the charging basket of oscillatory type light polishing machine or spiral-flow type light polishing machine, and media charges accounts for 1/2～3/4 of charging basket volume, and abrasive material is of a size of 0.1mm～30mm; Add entry and make the water surface flood abrasive material 0～20mm, add grinding agent, cleaning agent and brightener again, the addition of grinding agent, cleaning agent and brightener is respectively and adds 0.05%～10% of entry, light decorations process time: 0.5h～100h; Wherein, the vibration frequency of oscillatory type light polishing machine is 10～100Hz, and the rotating speed of spiral-flow type light polishing machine is 50～300r/min.
Described abrasive material comprises natural stone abrasive material, corundum, zirconia, zirconium silicate, carborundum, alumina porcelain, diamond or cubic boron nitride; The abrasive material shape comprises sphere, positive tetrahedron, regular triangular prism shaped, tiltedly triangular prism shaped, cylindrical, oblique circular cylinder shape, cube or other complicated shapes and irregularly shaped.
The addition of water is for flooding abrasive material 0～10mm in the described charging basket, and the addition of grinding agent, cleaning agent and brightener is to add 0.1%～1% of entry, light decorations process time: 0.5h～50h.
The solution that described water, grinding agent, cleaning agent and brightener are formed, life cycle is 6h～500h.
Advantage that the present invention has and beneficial effect,
The present invention combines differential arc oxidization technique and surface light decorations technology, obtains case hardness height, smooth no weaker zone arc differential oxide ceramic coating.
Tradition differential arc oxidation coating top layer is a weaker zone, and the characteristics of this weaker zone are exactly: loose porous, hardness is low, compactness is poor, thus cause that coating surface is loose porous, hardness is low, roughness is high, coefficient of friction is high.Therefore; Light polishing machine is put in workpiece behind the differential arc oxidation, abrasive material and the corresponding mixing mutually of preparing burden carried out the processing of light decorations; Under the effect of mechanical force; Produce relative displacement, collision between ceramic coating and abrasive material, in being in contact with one another of abrasive material and workpiece, friction process, abrasive particle is done micro-cutting processing to the ceramic coating surface.The effect of this micro-cutting, the weaker zone of ceramic coating outside will be ground away, thus compacted zone replacement becoming coating outer surface.Simultaneously, reduce the roughness on surface.So the arc differential oxide ceramic coating surface that obtains behind the light decorations is fine and close, hardness is high, roughness is low, coefficient of friction is low.The present invention carries out subsequent treatment through light decorations technology to the aluminum alloy differential arc oxidation coating, removes the surface porosity layer, obtains the ceramic coating of fine and close no weaker zone, and case hardness, roughness, coefficient of friction have obtained good improvement.Also be applicable to the different shape complex parts with time decorations process technology.
Description of drawings:
Fig. 1 wherein, (a) is the surface without coating surface, the cross section microphoto of light decorations; (b) be the cross section.
Fig. 2 uses different abrasive material oscillatory type light decorations back coating surface, cross section microphoto, wherein, and (a) ball surface; (b) ball cross section; (c) oblique three angle surfaces; (d) oblique triangle section; (e) oblique circular cylinder surface; (f) oblique circular cylinder cross section.。
Fig. 3 spiral-flow type light decorations back coating surface, cross section microphoto, (a) surface; (b) cross section.
The specific embodiment
Abrasive material is packed in the charging basket of oscillatory type light polishing machine or spiral-flow type light polishing machine; Media charges accounts for 1/2～3/4 of charging basket volume; Abrasive material is of a size of 0.1mm～30mm and adds entry and make the water surface flood abrasive material 0～20mm; Add grinding agent, cleaning agent and brightener again, the addition of grinding agent, cleaning agent and brightener is respectively and adds 0.05%～10% of entry, light decorations process time: 0.5h～100h; Wherein, the vibration frequency of oscillatory type light polishing machine is 10～100Hz, and the rotating speed of spiral-flow type light polishing machine is 50～300r/min.
The kind of the abrasive material that light decorations process according to the invention is selected for use is also varied, comprises natural stone abrasive material (river sand, quartz sand, cobblestone, dolomite), corundum (white fused alumina, brown corundum), zirconia, zirconium silicate, carborundum, alumina porcelain, diamond, cubic boron nitride etc.
The abrasive material that light decorations process according to the invention is selected for use is except that the material difference, and its shape is also varied.Comprise sphere, positive tetrahedron, regular triangular prism shaped, tiltedly triangular prism shaped, cylindrical, oblique circular cylinder shape, cube, other complicated shapes and irregularly shaped etc.
The batching of light decorations according to the invention processing mainly contains water, grinding agent, cleaning agent, brightener etc.
Light decorations process according to the invention according to unlike material, coating characteristic and final coating requirement, is selected the abrasive material and the relevant batching of suitable material and shape.The media charges optimum range is 1/2～3/4; Abrasive material optimum size scope is that 0.1mm～30mm adds entry and makes the water surface flood abrasive material 0～20mm for best; The optimum value of grinding agent, cleaning agent, brightener addition is to add 0.05%～10% of entry, and the replacement cycle of solution is 6～50h; Light decorations process time: 0.5h～100h.For the oscillatory type light polishing machine, optimum vibration frequency is 10～100Hz, and for the spiral-flow type light polishing machine, optimum speed is 50～300r/min.
Embodiment
Test material is selected LY12 for use, and its composition is seen table 1.
Table 1LY12 al alloy component
Embodiment 1
1, differential arc oxidation
To immerse in the electrolyte through the aluminum alloy specimen of ultrasonic cleaning and carry out differential arc oxidation.Oxidizing process adopts constant current anodizing process, and positive negative sense current density is 15A/dm
2/ 15A/dm
2, positive negative sense dutycycle is 20%/20%, and frequency is 300Hz, and oxidization time is 60min.This differential arc oxidation electrolyte is the potassium hydroxide that contains 2g/L, and the aqueous solution of the sodium metasilicate of 9g/L, electrolyte temperature are controlled between 20～60 ℃.
2, oscillatory type light polishing machine light decorations post processing
To place the oscillatory type light polishing machine to carry out the post processing of light decorations through the sample of differential arc oxidation.Abrasive material is selected white fused alumina for use, and the abrasive material shape is selected sphere, oblique triangle, three kinds of different shapes of oblique circular cylinder for use, and the abrasive material of three kinds of shapes is of a size of 3～5mm, and media charges is 2/3, and the water surface floods abrasive material 1mm, and grinding agent, cleaning agent, brightener addition are 0.1%.Vibration frequency is 50Hz.It is 8h that light is adornd process time.
Fig. 1 is coating surface and the section S EM photo of adoring without light behind the differential arc oxidation, and Fig. 2 is the surface and the section S EM photo of difform abrasive material light decorations back sample.As can be seen from Figure 2, coating surface becomes more smooth, fine and close after the light decorations are handled.Also there is the part weaker zone in sample coating after spherical abrasive material is handled; And there has not been weaker zone in the sample coating after tiltedly the trigonometric sum oblique circular cylinder is handled, only remaining compacted zone.
Table 2 is the variation of sample before and after the difform abrasive material light decorations.Can find out that therefrom sample weight and thicknesses of layers have all reduced, the light decorations are handled and have been removed surface porosity layer, especially oblique circular cylinder type abrasive material well, and the coating surface roughness has had tangible reduction, and skin-friction coefficient has also had significant reduction.
Variation before and after the table 2LY12 aluminum alloy differential arc oxidation sample vibration finishing
Embodiment 2
1, differential arc oxidation
With embodiment 1.
2, spiral-flow type light polishing machine light decorations post processing
To place the spiral-flow type light polishing machine to carry out the post processing of light decorations through the sample of differential arc oxidation.Select the white fused alumina abrasive material of oblique circular cylinder shape for use, abrasive material is of a size of 3～5mm, and media charges is 2/3, and the water surface just in time floods abrasive material, and grinding agent, cleaning agent, brightener addition are 0.1%.Rotating speed is 180r/min.It is 8h that light is adornd process time.
Fig. 3 is the surface and the section S EM photo of spiral-flow type light polishing machine light decorations back sample.As can be seen from Figure 3, coating surface planarization and compactness are greatly improved after the light decorations are handled.There has not been weaker zone in sample coating after the light decorations are handled, only remaining compacted zone.
Table 3 is the variation of sample before and after the difform abrasive material light decorations.Can find out that therefrom vibration finishing is handled and removed the surface porosity layer, sample weight and thicknesses of layers have all reduced, and the coating surface roughness has had reduction clearly, and the coating surface coefficient of friction has also had tangible reduction.
Variation before and after the table 3LY12 aluminum alloy differential arc oxidation sample spiral-flow type light decorations
Claims (4)
1. the post-processing approach of an aluminum alloy differential arc oxidation is characterized in that: abrasive material is packed in the charging basket of oscillatory type light polishing machine or spiral-flow type light polishing machine, and media charges accounts for 1/2～3/4 of charging basket volume, and abrasive material is of a size of 0.1mm～30mm; Add entry and make the water surface flood abrasive material 0～20mm, add grinding agent, cleaning agent and brightener again, the addition of grinding agent, cleaning agent and brightener is respectively and adds 0.05%～10% of entry, light decorations process time: 0.5h～100h; Wherein, the vibration frequency of oscillatory type light polishing machine is 10～100Hz, and the rotating speed of spiral-flow type light polishing machine is 50～300r/min.
2. the post-processing approach of a kind of aluminum alloy differential arc oxidation according to claim 1 is characterized in that, described abrasive material comprises natural stone abrasive material, corundum, zirconia, zirconium silicate, carborundum, alumina porcelain, diamond or cubic boron nitride; The abrasive material shape comprises sphere, positive tetrahedron, regular triangular prism shaped, tiltedly triangular prism shaped, cylindrical, oblique circular cylinder shape, cube or other complicated shape and irregularly shaped.
3. the post-processing approach of a kind of aluminum alloy differential arc oxidation according to claim 1; It is characterized in that: the addition of water is for flooding abrasive material 0～5mm in the described charging basket; The addition of grinding agent, cleaning agent and brightener is to add 0.1%～1% of entry, light decorations process time: 0.5h～20h.
4. the post-processing approach of a kind of aluminum alloy differential arc oxidation according to claim 1 is characterized in that: the solution that described water, grinding agent, cleaning agent and brightener are formed, life cycle is 10h～500h.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103624635A (en) * | 2013-11-27 | 2014-03-12 | 常熟市劲力工具有限公司 | Cutter surface processing technology |
| CN103962930A (en) * | 2014-05-20 | 2014-08-06 | 浙江湖磨抛光磨具制造有限公司 | Horizontal cylindrical vibration polishing method and polishing machine |
| CN103991024A (en) * | 2014-06-06 | 2014-08-20 | 深圳市欣天科技股份有限公司 | Tuning self-locking screw manufacturing process |
| CN104589196A (en) * | 2014-12-22 | 2015-05-06 | 贵州振华群英电器有限公司（国营第八九一厂） | Method for removing oxide at bottom of miniature electric device shell |
| CN104708525A (en) * | 2015-03-26 | 2015-06-17 | 蓝思科技股份有限公司 | Polishing method for tiny ceramic product |
| CN106080001A (en) * | 2016-06-20 | 2016-11-09 | 浙江工业大学 | The method of wheel grinding schemochrome based on plane reflection optical grating construction metal surface |
| CN107030584A (en) * | 2017-04-27 | 2017-08-11 | 安庆瑞钼特金属新材料有限公司 | Tungsten copper, molybdenum-copper alloy thin plate, the surface treatment method of foil part |
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| CN110524316A (en) * | 2019-08-29 | 2019-12-03 | 沈阳理工大学 | A kind of grinding method of the SiCp/Al composite material based on surface oxidation |
| US10871256B2 (en) | 2015-07-27 | 2020-12-22 | Schlumberger Technology Corporation | Property enhancement of surfaces by electrolytic micro arc oxidation |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103624635A (en) * | 2013-11-27 | 2014-03-12 | 常熟市劲力工具有限公司 | Cutter surface processing technology |
| CN103962930A (en) * | 2014-05-20 | 2014-08-06 | 浙江湖磨抛光磨具制造有限公司 | Horizontal cylindrical vibration polishing method and polishing machine |
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| CN104708525A (en) * | 2015-03-26 | 2015-06-17 | 蓝思科技股份有限公司 | Polishing method for tiny ceramic product |
| US10871256B2 (en) | 2015-07-27 | 2020-12-22 | Schlumberger Technology Corporation | Property enhancement of surfaces by electrolytic micro arc oxidation |
| CN106080001A (en) * | 2016-06-20 | 2016-11-09 | 浙江工业大学 | The method of wheel grinding schemochrome based on plane reflection optical grating construction metal surface |
| CN110214238A (en) * | 2017-01-30 | 2019-09-06 | Ｋｙｂ株式会社 | The manufacturing method of buffer and slide unit |
| CN107030584A (en) * | 2017-04-27 | 2017-08-11 | 安庆瑞钼特金属新材料有限公司 | Tungsten copper, molybdenum-copper alloy thin plate, the surface treatment method of foil part |
| CN109280951A (en) * | 2018-09-19 | 2019-01-29 | 贵州航天电子科技有限公司 | A kind of safe executive device mechanical caging panel processing method |
| CN109015329A (en) * | 2018-09-28 | 2018-12-18 | 湖南南方通用航空发动机有限公司 | A kind of method of moving turbine blade removal surface attachments |
| CN110524316A (en) * | 2019-08-29 | 2019-12-03 | 沈阳理工大学 | A kind of grinding method of the SiCp/Al composite material based on surface oxidation |
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Application publication date: 20120627 |