蔡明伟,曲寿江,魏先顺,沈军.喷涂工艺对超音速火焰喷涂 Al-Cu-Fe-Si 准晶合金涂层性能的影响[J].表面技术,2016,45(2):73-78.
CAI Ming-wei,QU Shou-jiang,WEI Xian-shun,SHEN Jun.Effect of Spraying Technology on the Properties of AC-HVAF Sprayed Al-Cu-Fe-Si Quasicrystalline Alloy Coating[J].Surface Technology,2016,45(2):73-78 |
| 喷涂工艺对超音速火焰喷涂 Al-Cu-Fe-Si 准晶合金涂层性能的影响 |
| Effect of Spraying Technology on the Properties of AC-HVAF Sprayed Al-Cu-Fe-Si Quasicrystalline Alloy Coating |
| 投稿时间：2016-01-05 修订日期：2016-02-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2016.02.011 |
| 中文关键词: Al-Cu-Fe-Si 准晶涂层 超音速火焰喷涂 显微硬度 耐腐蚀性能 抗粘性 |
| 英文关键词:Al-Cu-Fe-Si quasicrystalline coating AC-HVAF microhardness corrosion resistance anti-adhesive |
| 基金项目:国家自然科学基金项目(51274151) |
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| Author | Institution |
| CAI Ming-wei | School of Material Science and Engineering, Tongji University, Shanghai 201804, China |
| QU Shou-jiang | School of Material Science and Engineering, Tongji University, Shanghai 201804, China |
| WEI Xian-shun | School of Material Science and Engineering, Tongji University, Shanghai 201804, China |
| SHEN Jun | School of Material Science and Engineering, Tongji University, Shanghai 201804, China |
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| 中文摘要: |
| 目的 使用活性燃烧高速燃气喷涂(AC-HVAF)方法制备高质量的 Al-Cu-Fe-Si 准晶涂层,研究喷涂工艺对涂层性能的影响。 方法 采用气雾化 Al-Cu-Fe-Si 准晶合金粉末,利用 AK02T 型 AC-HVAF喷涂系统制备 Al-Cu-Fe-Si 准晶涂层材料。 通过 X 射线衍射及扫描电镜?旆治鲎季Ш辖鸱勰┖屯坎愕淖橹虢峁?通过电化学工作站、显微硬度计和接触角测试仪等手段分析准晶合金涂层的耐蚀性、显微硬度及抗粘性能。 结果 对气雾化准晶 Al-Cu-Fe-Si 合金粉末的研究发现,冷却速率显著影响准晶合金粉末的组织,在冷却速率较快的粉末中形成胞状晶组织,准晶 I 相含量较高。 对准晶合金涂层进行热处理,高温退火显著提高了涂层的硬度,950 ℃退火 12 h 后,硬度值达到(724±153)HV0. 1。 分别对准晶合金涂层和基体 45#钢的接触角进行测量,准晶合金涂层的接触角最大为 95°,而 45#钢的仅为 79°。 通过电化学工作站测试比较涂层的耐蚀性,发现在 3. 5% (质量分数)的 NaCl 溶液中,喷涂在 45#钢和 5052 铝合金基体上的涂层腐蚀电流密度 Jcorr分别为 6. 8×10-6,2. 0×10-7 A/ cm2。 结论 不同粒径的气雾化准晶合金粉末的相组成不同,选择合适的粒径是保证铝基准晶合金涂层质量的前提。 对涂层进行合适的热处理可以有效地提高涂层的显微硬度,铝基准晶合金涂层的接触角较 45#钢的高,提高了基体的抗粘性。 不同基体上制备的准晶合金涂层的耐蚀性有很大差异,5052 铝合金基体上的准晶涂层耐蚀性优于喷涂在 45#钢基体上的涂层。 |
| 英文摘要: |
| Objective To prepare Al-Cu-Fe-Si quasicrystalline alloy coatings with high quality by AC-HVAF and investigate the effect of spraying parameters on the coating properties. Methods Al-Cu-Fe-Si quasicrystalline alloy coatings were prepared by AK02T AC-HVAF spraying system using gas-atomized Al-Cu-Fe-Si quasicrystalline alloy powders. The phase and microstructures of gas-atomized alloy powders and coating were analyzed by XRD and SEM. Other properties, such as corrosion resistance, microhardness and anti-adhesive, were studied by electrochemical workstation, microhardness tester and contact angle instrument. Results The study on gas-atomized Al-Cu-Fe-Si quasicrystalline alloy powders found that cooling rate had significant influence on the structure of powers and the cellular structure was founded in the finer powder particles with higher cooling rate and the quasic-rystalline content of finer powder particles was higher than that of coarser particles. The microhardness of sprayed quasicrystalline coating increased after annealing at higher temperature during heat treatment. The microhardness reached up to (724±153)HV0. 1 after annealing at 950 ℃ for 12 h. The contact angle between quasicrystalline coating and distilled water at RT reached up to 95°, which was higher than that of 45# steel (79°). The comparison of the corrosion current density for coating by the electrochemical workstation test showed the corrosion current density for coating sprayed on 5052 aluminum substrates was 2. 0×10 -7 A / cm2 and for 6. 8×10 -6 A / cm2 on 45# steel substrates in 3. 5% NaCl solution. Conclusion Gas-atomized quasicrystalline alloy powders with different sizes contain different phases. Selection of proper size of quasicrystalline alloy powders is very important for high quality coatings. Annealing process can effectively increase the coating hardness. The contact angle of Al-based quasicrystalline alloy coating is higher than that of 45# steel substrate, which indicates the improvement of anti-adhesive property of substrate. The corrosion resistance of coating varies significantly for different coating substrate materials, the coating sprayed on 5052 aluminums substrate has a better corrosion resistance than that on 45# steels substrate. |
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