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冷喷涂辅助原位合成高铝青铜涂层的组织与性能
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兰州理工大学材料科学与工程学院

基金项目:

国家重点研发计划(2016YFE0111400);甘肃省重点研究项目(17YF1WA159);中国博士后科学(2018-63-200618-34)


The organization and performance of cold spray-assisted in-situ synthesis of high aluminum bronze coatings
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College of Material Science and Technology,Lanzhou University of Technology

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    摘要:

    提出了一种冷喷涂辅助原位合成合高铝青铜合金涂层的方法,使用该方法在45#钢基体上制备了高铝青铜涂层。通过SEM、EDS、XRD分析涂层微观形貌和物相组织;采用销?盘式摩擦磨损试验机测试涂层的摩擦磨损性能;用CHI660D电化学测试系统测合金涂层耐腐蚀性能。结果表明:冷喷涂辅助原位合成高铝青铜合金涂层的组织是以β相、α相、γ2相和k相为主的典型高铝青铜合金组织。原位合成的高铝青铜合金涂层结构致密、孔隙率低,具有良好的机械性能和耐磨、耐腐蚀性能,与铸态块体高铝青铜合金的性能接近。涂层的硬度为357.0HV,与氧化铝的干摩擦系数为0.320。在3.5wt.%NaCl和5.0wt.%H2SO4 腐蚀介质中的稳定电压分别为-366mV和-387mV。

    Abstract:

    In this study, a method of cold-spray-assisted synthesis of high-aluminum bronze alloy coating is proposed, and a high-aluminum bronze coating is prepared on 45 steel matrix. The corrosion resistance of the alloy coating was measured with the CHI660D electrochemical test system by analyzing the micromorphology and phase tissue of the coating by SEM, EDS and XRD. The results show that after induction remelting, the in situ synthesis tissue of cold spray metal mixed coating is a high aluminum bronze alloy coating of beta-phase, alpha-phase, gamma-2-phase and k-phase, with dense coating and low porosity. The high aluminum bronze alloy coating in situ has good mechanical properties and wear resistance, corrosion resistance, and the performance of cast block high aluminum bronze alloy is close. The hardness of the coating is 357.0HV and the dry friction coefficient with alumina is 0.320. The stable voltages in 3.5wt.%NaCl and 5.0wt.%H2SO4 corrosion media were -366mV and -387mV, respectively.

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冯力,王贵平,李洞亭,安国升,李文生.冷喷涂辅助原位合成高铝青铜涂层的组织与性能[J].稀有金属材料与工程,2021,50(5):1720~1726.[Feng Li, Wang Guiping, Li Dongting, An Guosheng, Li Wensheng. The organization and performance of cold spray-assisted in-situ synthesis of high aluminum bronze coatings[J]. Rare Metal Materials and Engineering,2021,50(5):1720~1726.]
DOI:10.12442/j. issn.1002-185X.20200294

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  • 收稿日期:2020-05-04
  • 最后修改日期:2020-06-07
  • 录用日期:2020-06-09
  • 在线发布日期: 2021-06-09
  • 出版日期: 2021-05-25