WEAR OF RAILWAY BRAKE BLOCK MATERIALS AT ELEVATED TEMPERATURES - PIN-ON-DISC EXPERIMENTS

摘要

An experimental study on a pin-on-disc rig is presented where the wear of some brake block materials at controlled elevated disc temperatures are reported. It is found for the three studied organic composite materials that the (specific) wear rate increases radically at a temperature of about 500°C. For temperatures below 500°C, the wear rate is found to increase with temperature. The cast iron material shows an increase of the wear rate up to 500°C, after which a transition in the wear mechanism occurs and the wear rate is decreasing with increasing temperature. The studied sinter material shows a weak dependence of the wear rate with temperature.