| 摘要: |
| 针对铝基非晶合金形成能力弱的问题,采用超音速火焰喷涂(HVAF)工艺制备出铝基非晶合金涂层,研究了优化工艺参数对涂层孔隙率和非晶含量的影响,并评价了涂层的耐蚀和耐磨性能。 结果表明:在合适的喷涂厚度下,提高喷枪移动速率及降低送粉速度,可有效提高涂层的致密度与非晶含量,进而明显提升了涂层的耐蚀和耐磨性能。 在优化的工艺参数下得到的铝基非晶涂层孔隙率为 0. 12%,非晶含量为 83. 7%时,点蚀电位可提高到-0. 3 VSCE ,腐蚀电流密度降低一个数量级,磨损速率仅为 5. 6×10 -4 mm 3N -1m -1 。 |
| 关键词: 超音速火焰喷涂 非晶涂层 腐蚀性能 磨损行为 |
| DOI：10.11933/j.issn.1007-9289.20190507003 |
| 分类号:TG174.442 |
| 文章编号:1007-9289(2020)01-0101-09 |
| 文献标识码:A |
| 基金项目:国家重点研发计划(2018YFB1105803) |
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| Effects of HVAF Parameters on Properties of Al-based Amorphous Metallic Coating |
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Qiu Shi1, Wang Haowei1, Wang Xiaoming2, Chang Qing2, Lv Weiyan3, Yang Baijun3
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1.Key Laboratory of Structure Corrosion Protection and Control Aviation Science, China Special Vehicle Research Institute,Jingmen 448035 , China;2.National Key Laboratory for Remanufacturing, Army Academy of Armored Forces, Beijing 100072 ,China;3.Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016 , China
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| Abstract: |
| For the low glass forming ability of aluminum-based amorphous alloys, Aluminum based amorphous coating was prepared by using two different high velocity air fuel (HVAF) spraying processes. The effects of process parameters on the porosity and amorphous content of the coating were studied, and the corrosion resistance and wear resistance of the coating were evaluated. The results show that: Under the proper spraying thickness, increasing the spray gun moving speed and reducing the powder feeding speed can effectively increase the density and amorphous content of the coating,, thereby significantly improving the corrosion and wear resistance. When the porosity was 0. 12 % and the amorphous content was 83. 7 %, the point erosion potential could be increased to -0. 3 VSCE , and the corrosion current density was reduced by an order of magnitude. The wear rate is only 5. 6 × 10 -4 mm 3 N -1m -1 . |
| Key words: high velocity air fuel (HVAF) amorphous coating corrosion property wear behavior |
