颗粒复合电沉积对材料表面粗糙度的影响  

Effect of Grain Composite Electrodeposition on Roughness of Metal Surface

作　　者：谭勇[1] 刘常升[2] 于晓中[2] 

机构地区：[1]沈阳理工大学环境与化工学院,辽宁沈阳110168 [2]东北大学材料各向异性与织构教育部重点实验室,辽宁沈阳110004

出　　处：《钢铁钒钛》2012年第1期87-90,共4页Iron Steel Vanadium Titanium

基　　金：国家自然科学基金资助项目(50674022);长江学者和创新团队发展计划资助(IRT0713)

摘　　要：以镍和高硬度微粒的复合沉积电镀层作为中间层,然后对中间层进行镀铬。电沉积后的材料表面凹坑呈随机分布,峰值密度很高,保持性、再现性优异,不受轧辊材质、硬度影响。试验结果表明:复合电沉积工艺中,镀液温度对试验结果的影响最大,电流密度对试验结果的影响次之。电流密度为5 A/dm2、镀液温度为50℃、镀液的pH值为4.8时,可以获得较大粗糙度。粗糙度Ra的范围为1.95～6.98μm。从电子扫描显微照片上可以看出,电镀微粒分布均匀。电沉积铬以后粗糙度主要集中在2～4μm,金属表面在镀铬后表面具有较好的硬度和比较理想的粗糙度。In this paper,the intermediate layer prepared with electrodepositing of nickel and super hard particles was then chromed.Parameters,including current density and temperature,were studied in the experiments.Surface roughmeter and SEM were used to obtain the roughness data and micrograph of the surface.The experimental results showed that preferable roughness could be achieved with temperature of 50 ℃,current density of 5 A/dm2 and pH of 4.8.From the SEM micrograph,it could be seen that the particles on the surface were uniformly distributed.Difference in electrodepositing time induced different nickel content which affected the binding force.The chromed metal surface showed preferable hardness and roughness（2~4 μm）.

关 键 词：复合电沉积 微粒 表面毛化 冷轧辊 粗糙度 

分 类 号：TQ153.1[化学工程—电化学工业]