Effects of Micro - Arc Oxidation on Dimensional Accuracy and Properties of 6061 Aluminum Alloy Bush
At present, there are few studies on the film structure of micro-arc oxidation film on aluminum alloy and the dimensional accuracy change of precision thin wall parts before and after micro-arc oxidation.The samples of 6061 aluminum alloy bushing(precision thin wall parts), used for the aircraft eng...
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| Format: | Article |
| Language: | zho |
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Editorial Department of Materials Protection
2021-06-01
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| Series: | Cailiao Baohu |
| Subjects: | |
| Online Access: | http://www.mat-pro.com/fileup/1001-1560/PDF/20210619.pdf |
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| Summary: | At present, there are few studies on the film structure of micro-arc oxidation film on aluminum alloy and the dimensional accuracy change of precision thin wall parts before and after micro-arc oxidation.The samples of 6061 aluminum alloy bushing(precision thin wall parts), used for the aircraft engine fuel control system accessory，were treated by four different micro-arc oxidation processes(A, B, C and D).The microstructure，composition and micro-hardness of micro-arc oxidation ceramic layer were detected and analyzed.Besides, the inner diameter，the cylindricity and the surface roughness of the inner hole before and after MAO were tested.Results showed that the micro-arc oxidation ceramic layer obtained by C and D processing parameters with special auxiliary equipment had excellent properties.The surface hardness could reach 900 HV，which was 6 times of that of 6061 aluminum alloy matrix material.The micro-arc oxidation ceramic layer significantly improved the wear resistance and service life of parts, at the same time met the strict requirement of dimensional precision.This study laid a foundation for the engineering application of aluminum alloy micro-arc oxidation process. |
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| ISSN: | 1001-1560 |