Ni-P/nano-Al_2O_3复合镀层的制备及性能  

Preparation and Properties of Ni-P/nano-Al_2O_3 Composite Coating

作　　者：姚建安 YAO Jianan(Pukou School,Jiangsu Union Technical Institute,Nanjing 211800,China)

机构地区：[1]江苏省联合职业技术学院浦口办学点,江苏南京211800

出　　处：《电镀与精饰》2018年第8期38-41,共4页Plating & Finishing

基　　金：江苏省职业技术教育学会课题项目(2013191)

摘　　要：以汽车模具配件—导柱常用的20Cr钢为基材,在其表面制备Ni-P/nano-Al_2O_3复合镀层及普通Ni-P镀层。对Ni-P/nano-Al_2O_3复合镀层的微观形貌、晶相结构、显微硬度和摩擦磨损性能进行了测试与分析,并与Ni-P镀层和基材进行了对比。结果表明,Ni-P/nano-Al_2O_3复合镀层的晶粒细小,结构更加致密,显微硬度平均值可达到436.4 HV,高于Ni-P镀层的357.3 HV和基材的190HV;与Ni-P镀层相比,Ni-P/nano-Al_2O_3复合镀层能更有效地改善基材的摩擦磨损性能。NanoAl_2O_3颗粒复合量对Ni-P/nano-Al_2O_3复合镀层的显微硬度和摩擦磨损质量损失率有一定影响,增加颗粒复合量可以提高复合镀层的显微硬度,改善其摩擦磨损性能。Ni-P/nano-Al2O3 composite coating and Ni-P coating were prepared on base material(20Cr steel)of guide pillar which was used as automobile mould fittings.The micromorphology,crystal struc?ture,microhardness and friction and wear property of Ni-P/nano-Al2O3 composite coating were tested and analyzed,and were compared with those of Ni-P coating and base material.The results showed that Ni-P/nano-Al2O3 composite coating possessed refined grains and denser structure,the average microhardness value was 436.4 HV,which was higher than that of Ni-P coating(357.3 HV)and base materi?al(190 HV).Ni-P/nano-Al2O3 composite coating can effectively improve the friction and wear property of base material as compared with Ni-P coating.Nano-Al2O3 content has certain influence on the microhardness and friction and wear property of Ni-P/nano-Al2O3 composite coating,higher nano-Al2O3 con?tent increases the micro-hardness of Ni-P/nano-Al2O3 composite coating and improves its friction and wear property.

关 键 词：Ni-P/nano-Al2O3复合镀层 汽车模具配件 微观形貌 显微硬度 摩擦磨损性能 

分 类 号：TQ153.2[化学工程—电化学工业]