等离子喷涂与激光重熔复合制备Mo_(2)NiB_(2)涂层的组织和性能研究  

Study on Microstructure and Properties of Mo_(2)NiB_(2)Coating Prepared by Plasma Spraying and Laser Remelting

作　　者：赵远涛 潘正阳 刘明辉 张士陶 刘沈强 赵冬冬 李文戈[1] 刘彦伯 ZHAO Yuantao;PAN Zhengyang;LIU Minghui;ZHANG Shitao;LIU Shenqiang;ZHAO Dongdong;LI Wenge;LIU Yanbo(Shanghai Maritime University,Shanghai 201306,China;Shanghai Nanotechnology Promotion Center,Shanghai 200237,China;Shanghai Songjiang District Landscaping and City Appearance Administrative Bureau,Shanghai 201699,China)

机构地区：[1]上海海事大学,上海201306 [2]上海市纳米科技与产业促进发展中心,上海200237 [3]上海市松江区绿化和市容管理局,上海201699

出　　处：《航空制造技术》2024年第4期64-71,103,共9页Aeronautical Manufacturing Technology

基　　金：国家自然科学基金(52072236);国家自然科学基金青年项目(52002242);国家自然科学基金面上项目(52371069);上海高水平地方高校创新团队(海事安全与保障)。

摘　　要：采用大气等离子喷涂方法在Q235低碳钢表面制备Mo_(2)NiB_(2)基金属陶瓷涂层,选取300 W和500 W功率对其进行激光重熔。结果表明,激光重熔可以显著减少涂层的缺陷,使组织结构变得更加致密,界面处的弱机械结合转变为良好的冶金结合。随着激光功率的提高,涂层的结合强度和耐腐蚀性能提高,最大结合强度为38.08 MPa,最小腐蚀电流为0.033μA/cm^(2),但硬度和耐磨性降低,最小硬度为1781HV0.2,最大体积摩擦率为6.25×10^(-5)mm^(3)/(N·m)。上述等离子喷涂及2种激光重熔的Mo_(2)NiB_(2)基金属陶瓷涂层的硬度、结合强度、耐磨性和耐腐蚀性都明显高于Q235低碳钢基体。Mo_(2)NiB_(2)based cermet coating was prepared on the surface of Q235 low carbon steel by atmospheric plasma spraying,and laser remelting was carried out at 300 W and 500 W power.The results show that the laser remelting method can significantly reduce the defects of the coating,make the microstructure more dense,and the weak mechanical bonding at the interface is transformed into a good metallurgical bonding.With the increase of laser power,the bonding strength and corrosion resistance of the coating are improved,the maximum bonding strength is 38.08 MPa,and the minimum corrosion current is 0.033μA/cm^(2);But the hardness and wear resistance are reduced,the minimum hardness is 1781HV0.2,and the maximum volume friction rate is 6.25×10^(-5)mm^(3)/(N·m).The hardness,bonding strength,wear resistance and corrosion resistance of the above plasma sprayed and two kinds of laser remelted Mo_(2)NiB_(2)based cermet coatings were significantly higher than those of Q235 low carbon steel substrate.

关 键 词：激光重熔 等离子喷涂 Mo_(2)NiB_(2)涂层 结合强度 耐腐蚀性能 

分 类 号：TG174.4[金属学及工艺—金属表面处理]