冷喷涂辅助原位合成高铝青铜涂层的组织与性能  

Microstructure and Performance of Cold Spray-assisted In-situ Synthesized High Aluminum Bronze Coatings

作　　者：冯力[1,2] 王贵平 李洞亭 安国升 李文生[1,2] Feng Li;Wang Guiping;Li Dongting;An Guosheng;Li Wensheng(College of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,China;State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals,Lanzhou 730050,China)

机构地区：[1]兰州理工大学材料科学与工程学院,甘肃兰州730050 [2]有色金属先进加工与再利用国家重点实验室,甘肃兰州730050

出　　处：《稀有金属材料与工程》2021年第5期1720-1726,共7页Rare Metal Materials and Engineering

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

摘　　要：提出了一种冷喷涂辅助原位合成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(HV)为3570 MPa,与氧化铝的干摩擦系数为0.320。在3.5%Na Cl和5.0%H_(2)SO_(4)(质量分数)腐蚀介质中的稳定电压分别为-366和-387mV。A method of cold-spray-assisted synthesis of high-aluminum bronze alloy coating was proposed,and a high-aluminum bronze coating was prepared on 45 steel matrix.The corrosion resistance of the alloy coating was measured with the CHI660 D 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 ofβ-phase,α-phase,γ2-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 HV of the coating is 3570 MPa and the dry friction coefficient with alumina is 0.320.The stable voltages in 3.5 wt%NaCl and 5.0 wt%H_(2)SO_(4) corrosion media are-366 and-387 mV,respectively.

关 键 词：冷喷涂 原位合成 高铝青铜 摩擦 

分 类 号：TG174.4[金属学及工艺—金属表面处理]