Damage Behavior Analysis of Railway Freight Car Brake Beam Wear Sleeve
The damage of the wear sleeve of railroad wagon brake beam directly affects the life of the wear sleeve,thus affecting the braking safety of the train.In order to investigate the damage form of the wear sleeve of railroad wagon brake beam,the wear sleeve of brake beam is analyzed and researched on site,and the wear sleeve with typical damage is analyzed by using super-field optical microscope(OM)and scanning electron microscope(SEM)for damage analysis,and the wear surface is analyzed by using EDS Elemental analysis was performed on the wear surface using EDS.The research found that:the damage of the wear sleeve in the field is mainly wear,wear to the limit is the main reason for the wear sleeve elimination,more serious will be a small amount of wear sleeve fracture,affecting the braking performance and driving safety;the typical damage of the wear sleeve for laboratory analysis found that the wear sleeve in the use of the process is easy to produce side wear,and the damage of the wear sleeve in the form of wear,foreign body inlay,material spalling,cracking and fracture,Through elemental analysis of the wear surface,it was found that there were many metal elements and oxidation on the wear surface,and there were impurities on the surface,so the wear mechanism of the wear sleeve was mainly abrasive wear,accompanied by adhesive wear and oxidation wear.