Experimental Study On Friction And Wear Characteristics Of Different Tool Materials With Titanium Alloys

In this paper, an intensive study on the friction and wear characteristics of different tool materials with titanium alloys was performed systemically by the friction and wear test device.The friction and wear characteristics of cemented carbides YG6 and ceramic materials with Ti6A14V alloys in different loads and speeds are revealed by ball-on-disc rotation. The results show that the average friction coefficient is reduced with the increase of loads and speeds. When Ti6A14V alloys against AI2O3, Si3N4, ZrO2 pairs, the average friction coefficient is reduced with the increasing of loads and increased with the increasing of speeds. At the same condition the average coefficient of cemented carbides YG6 is lower than the ceramic materials.The friction and wear characteristics of cemented carbides YG6 with Ti6A14V alloys in different loads and speeds are revealed by pin-on-disc rotation. The results show that the variation of friction coefficient is the same as Ti6A14V grinding with YG6 at the condition ball-on-disc rotation when Ti6A14V against YG6, YG8, YG6X and YD201 pairs. At the same condition the average frintion coefficient is reduced with the decrease of grain size and Co content.Wear morphology and wear mechanisms were studied, observed by SEM (scanning electron microscopy) and EDS (energy dispersive analysis system). The results show that the wear mechanism of cemented carbides is abrasive wear and adhesive wear caused by Co binder plastic deformation, WC grain shedding and titanium bonding. The friction and wear surface of ceramic materials grinding with titanium alloy is composed of continuous or discontinuous adhesive material and brittle fracture pits, the wear mechanism is mainly adhesive wear, brittle fracture of ceramic materials and grain pull out.