纳米镍粉在液压油中的分散及其摩擦学性能研究  

Dispersion and Tribological Properties of Nano-nickel Powder in Hydraulic Oil

作　　者：黄俊杰[1] 张振忠[1] 赵芳霞[1] 武黎明 HUANG Junjie;ZHANG Zhenzhong;ZHAO Fangxia;WU Liming(College of Materials Science ＆ Engineering,Nanjing University of Technology,Nanjing 210009,China)

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009

出　　处：《铸造技术》2018年第7期1516-1519,共4页Foundry Technology

基　　金：江苏高校优势学科建设工程项目(苏政办发2011-6);广西科技成果转化与推广计划项目(1298009-15)资助

摘　　要：在研究了不同粘度等级传统液压油摩擦学性能及其载荷特性的基础上,采用高速剪切和纳米镍粉表面修饰相结合的分散方式,制备了含纳米镍粉的液压油,研究了超声时间、分散剂种类及加入量、高速剪切转速和时间对80 nm镍粉在液压油中分散性能的影响,并采用四球试验机研究了纳米镍粉加入量对46号及68号液压油摩擦学性能的影响。结果表明,添加8%的硅烷偶联剂KH-560+甲基硅油,先超声15 min,然后以3 000 r/min转速、高速剪切20 min时,纳米镍粉在液压油中的分散效果最好,稳定性最高,摩檫学性能最优;在392 N的载荷下,在粘度等级为46和68的液压油中分别加入0.25%和0.05%镍粉时综合摩擦学性能较好,摩擦系数和磨斑直径较基础液压油分别降低了29.3%、9.4%和30.8%、22.9%。Based on the study of tribological properties and loading characteristics of traditional hydraulic oil with different viscosity grades,the hydraulic oil containing nanometer nickel powder was prepared by high speed shear and nanometer nickel powder surface modification.The effect of ultrasonic time,dispersant type and dosage,high speed shear speed and time on the dispersion performance of 80 nm nickel powder in hydraulic oil was studied.The effect of nanometer nickel powder on tribological properties of No.46 and No.68 hydraulic oil was studied by four-ball tester.The results show that adding of 8 wt% silane coupling agent KH-560 and methyl silicone oil,ultrasonic for 15 min,and then to 3 000 rpm speed,high speed shearing for 20 min,nano-nickel powder in the hydraulic oil and dispersing effect is best,the best stability,friction optimal learning performance;Under the load of 392 N,the comprehensive tribological performance is better when0.25% and 0.05% nickel powder are respectively added into the hydraulic oil with viscosity grade No.46 and No.68.Compared with the basic hydraulic oil,the friction coefficient and wear scar diameter are 29.3%,9.4%,30.8% and22.9%,respectively.

关 键 词：液压油 纳米镍粉 分散 摩擦学性能 

分 类 号：TG146.15[一般工业技术—材料科学与工程] TE626.38[金属学及工艺—金属材料]