Enhancing tribological performance of cemented carbide (WC-12Co) by pulsed magnetic field treatment and magnetofluid

Pulsed magnetic field treatment was applied to the cemented carbide (WC-12Co) for enhancing its friction-reducing and anti-wear effect under different friction conditions , including dry, distilled water and nano-Fe 3 O 4 particles additive friction. The results show that the friction reduction and anti-wear effect could be enhanced with pulsed magnetic field applied . Especially, with nano-Fe 3 O 4 magnetofluid lubrication , the wear volume of workpiece is reduced by 26.8% and the average friction coefficient is reduced by 12.4%. The effect of the pulsed magnetic field on tribological properties is closely related to the oxidation and remanence. It can promote oxidation and forms a protective layer on the friction pair . Furthermore, it can make magnetofluid gather and amplify the lubrication.