Year
2019
Degree Name
Doctor of Philosophy
Department
School of Mechanical, Materials, Mechatronic and Biomedical Engineering
Abstract
Like any other metalworking processes, lubrication plays a crucial role in hot metal forming (e.g. hot rolling). An effective lubrication ensures high energy efficiency, low material loss and optimal product quality. The current study investigates potential lubrication properties of alkaline borates at elevated temperature by extensive experimental work. Advanced microscopy analysis allows insights into working mechanics of the lubricants at different scales which help addressing some fundamental questions arise from the past literatures.
Tribological behaviors of sodium borate were thoroughly studied by pin-on-disc testing. With a transition point around 525oC, the material exhibits exceptional lubrication performance over the range of 600oC-800oC on sliding steel pair (GCr15/mild steel). This is demonstrated by remarkable reduction in friction coefficient and wear loss volume on both contact surfaces lubricated by sodium borate compared to the unlubricated case...
Recommended Citation
Tran, Bach, High-temperature lubrication mechanism of alkaline borates, Doctor of Philosophy thesis, School of Mechanical, Materials, Mechatronic and Biomedical Engineering, University of Wollongong, 2019. https://ro.uow.edu.au/theses1/700
FoR codes (2008)
0910 MANUFACTURING ENGINEERING, 0912 MATERIALS ENGINEERING
Unless otherwise indicated, the views expressed in this thesis are those of the author and do not necessarily represent the views of the University of Wollongong.