Zn-Al-Ni热浸镀液中Ni含量对镀层形貌、硬度及耐磨性的影响  

Effect of Nickel Content in Hot-Dip Galvanizing Solution on Morphology as well as Hardness and Wear Resistance of Zinc-Aluminum-Nickel Coating

作　　者：邵大伟[1] 贺志荣[1] 张永宏[1] 

机构地区：[1]陕西理工学院材料科学与工程学院,陕西汉中723003

出　　处：《材料保护》2013年第2期4-6,66,共3页Materials Protection

基　　金：陕西省科技统筹创新工程计划项目(2011KTDZ01-03-06);汉中锌业有限责任公司科研基金项目(HZXY2011003)资助

摘　　要：为了提高热浸镀锌层表面的光洁度、硬度和耐磨性,在Zn-0.01%Al镀液中添加少量Ni,制备了Zn-0.01%Al-(0.02～0.12)%Ni镀层。利用金相显微镜、维氏硬度计和摩擦磨损试验机对镀层的表面形貌和性能进行了表征。结果表明,随Ni含量增加,Zn-0.01%Al-xNi镀层的晶粒先减小后增大,硬度先增大后减小;当Ni含量为0.05%时镀层的晶粒最小,硬度最大,摩擦系数最小,耐磨时间较长;Ni含量为0.12%的镀层的耐磨时间虽然最长,但摩擦系数较大。A small amount of Ni was introduced into hotdip galvanizing solution(Zn0.01%Al bath) to prepare ZnAlNi coating [Al content 0.01%(mass fraction;the same hereafter);Ni content 0.02%～0.12%] so as to reduce the surface roughness and increase the hardness and wear resistance of hotdip galvanizing coating.The morphology of asprepared ZnAlNi coating was observed with a metallurgical microscope,while the hardness and wear resistance of the coating were evaluated with a Vickers hardness meter and a friction and wear tester as well.It was found that,with increasing Ni content in the hotdip galvanizing solution,the grain size of ZnAlNi coating initially tended to decline but later to rise;and the hardness initially tended to rise but later to decline therewith.The ZnAlNi coating prepared from the hotdip galvanizing solution containing 0.05% Ni had the smallest grain size,the highest hardness and extended antiwear lifetime.Moreover,though the ZnAlNi obtained from the galvanizing bath containing 0.12% Ni had the longest antiwear lifetime,it possessed a relatively high friction coefficient.

关 键 词：热浸镀锌 Ni含量 表面形貌 硬度 摩擦学性能 

分 类 号：TG174.443[金属学及工艺—金属表面处理]