磁流体极性对钛合金表面织构的摩擦学性能研究  

Effect of Ferrofluid Polarity on Tribological Properties of Titanium Alloy Durface Texture

作　　者：莫君 王优强 左名玉 胡宇 房玉鑫 MO Jun;WANG You-qiang;ZUO Ming-yu;HU Yu;FANG Yu-xin(School of Mechanical and Automotive Engineering,Qingdao University of Technology,Shandong Qingdao 266520,China;Key Lab of Industrial Fluid Energy Conservation and Pollution Control,Ministry of Education,Shandong Qingdao 266520,China)

机构地区：[1]青岛理工大学机械与汽车工程学院,山东青岛266520 [2]工业流体节能与污染控制教育部重点实验室,山东青岛266520

出　　处：《表面技术》2022年第8期252-261,共10页Surface Technology

基　　金：国家自然科学基金(51575289);山东省自然科学基金(ZR2021ME063)。

摘　　要：目的 研究磁流体的极性对钛合金光滑表面和织构表面摩擦学性能的影响。方法 以水基磁流体、煤油基磁流体、去离子水和煤油为润滑剂,在UMT-3摩擦磨损试验机上分别进行钛合金光滑表面和织构表面的摩擦磨损实验,得到极性不同的磁性颗粒对不同表面的摩擦因数、磨损量和磨损形貌的影响规律。结果 在光滑钛合金表面,极性磁性颗粒使得摩擦因数下降了8.42%,磨痕宽度下降了8.47%,磨损方式由严重的磨粒磨损和黏着磨损转变为轻微的磨粒磨损。非极性磁性颗粒使得摩擦因数上升了33.94%,磨痕宽度上升了42.20%,磨损方式由轻微的黏着磨损转变为严重的磨粒磨损。在织构表面,极性磁性颗粒的减摩作用进一步增强,而非极性磁性颗粒并没有明显的减摩作用。结论 采用不同极性磁流体润滑时,极性磁性颗粒更容易吸附在钛合金表面,从而增加油膜的厚度和刚度,减小其摩擦因数。The paper aims to study the effect of magnetic fluid polarity on the tribological properties of smooth and textured surface of titanium alloy.The friction and wear experiments of smooth and textured surfaces of titanium alloy are carried out on UMT-3 friction and wear tester with water-based ferrofluid,kerosene-based ferrofluid,deionized water and kerosene as lubricants.The effects of magnetic particles with different polarity on friction coefficient,wear amount and wear morphology of different surfaces are obtained.The results show that:on the smooth surface of titanium alloy,the friction coefficient decreases by 8.42%and the wear scar width decreases by 8.47%.The non-polar magnetic particles increase the friction coefficient by 33.94%and the wear scar width by 42.20%.The wear mode changes from slight adhesive wear to severe abrasive wear.On the textured surface,the friction reducing effect of polar magnetic particles is further enhanced,while that of non-polar magnetic particles is not obvious.When lubricated by different polarity magnetic fluid,the polar magnetic particles will be more easily adsorbed on the surface of titanium alloy,thus increasing the thickness and stiffness of oil film and reducing the friction coefficient.

关 键 词：磁流体 钛合金光滑表面 织构表面 极性磁性颗粒 摩擦学性能 

分 类 号：TH117.1[机械工程—机械设计及理论]