Tribological Performance of Different Concentrations of Al_(2)O_(3)Nanofluids on Minimum Quantity Lubrication Milling  

作　　者：Xiufang Bai Juan Jiang Changhe Li Lan Dong Hafiz Muhammad Ali Shubham Sharma 

机构地区：[1]School of Mechanical and Automotive Engineering,Qingdao University of Technology,Qingdao 266520,China [2]School of Mechanical and Electrical Engineering,Qingdao Binhai University,Qingdao 266555,China [3]Mechanical Engineering Department,King Fahd University of Petroleum and Minerals,Dhahran 31261,Saudi Arabia [4]Department of Mechanical Engineering,IK Gujral Punjab Technical University,Main Campus-Kapurthala,Jalandhar 144603,India

出　　处：《Chinese Journal of Mechanical Engineering》2023年第4期67-78,共12页中国机械工程学报（英文版）

基　　金：Supported by National Natural Science Foundation of China(Grant Nos.51806112,51975305);PhD Research Startup Foundation of Qingdao University of Technology,China(Grant Nos.JC2022-012,20312008).

摘　　要：Nanofluid minimum quantity lubrication(NMQL)is a green processing technology.Cottonseed oil is suitable as base oil because of excellent lubrication performance,low freezing temperature,and high yield.Al_(2)O_(3)nanoparticles improve not only the heat transfer capacity but also the lubrication performance.The physical and chemical proper-ties of nanofluid change when Al_(2)O_(3)nanoparticles are added.However,the effects of the concentration of nanofluid on lubrication performance remain unknown.Furthermore,the mechanisms of interaction between Al_(2)O_(3)nanoparti-cles and cottonseed oil are unclear.In this research,nanofluid is prepared by adding different mass concentrations of Al_(2)O_(3)nanoparticles(0,0.2%,0.5%,1%,1.5%,and 2%wt)to cottonseed oil during minimum quantity lubrication(MQL)milling 45 steel.The tribological properties of nanofluid with different concentrations at the tool/workpiece interface are studied through macro-evaluation parameters(milling force,specific energy)and micro-evaluation parameters(surface roughness,micro morphology,contact angle).The result show that the specific energy is at the minimum(114 J/mm^(3)),and the roughness value is the lowest(1.63μm)when the concentration is 0.5 wt%.The surfaces of the chip and workpiece are the smoothest,and the contact angle is the lowest,indicating that the tribological proper-ties are the best under 0.5 wt%.This research investigates the intercoupling mechanisms of Al_(2)O_(3)nanoparticles and cottonseed base oil,and acquires the optimal Al_(2)O_(3)nanofluid concentration to receive satisfactory tribological properties.

关 键 词：MILLING Al_(2)O_(3)nanofluid Minimum quantity lubrication(MQL) Surface micromorphology 

分 类 号：TH133.3[机械工程—机械制造及自动化]