Friction and wear performance of Titanium alloy against tungsten carbide lubricated with phosphate ester

摘要

The friction and wear performance of titanium alloys against tungsten carbide balls under four kinds of aqueous solutions were investigated. The results showed that triethanolamine borate had no effect on lubricating titanium alloy. The friction coefficient was high and the worn surface was as rough as that lubricated with water. While PPE solutions reduced the friction coefficient and wear volume thus a well finish surface being obtained. It exhibited even better lubricating and anti-wear abilities than the commercial emulsion used for cutting titanium alloys. The adhesive wear was weaken at the same time. The XPS analysis demonstrated that adsorption film formed by P-O-Ti covalent bond on titanium alloy surface avoided the directly contacting with the counter surface. This paper found a new aqueous system to lubricate titanium alloys/tungsten carbide effectively which gave a direction on choosing water-based additives for machining titanium alloys cutting fluid.