Evaluation of in-service behaviour of different types of ultra-hard rails

The phenomena related to the maintenance in efficiency of the railway infrastructure are subject to continuous studies and investigations as the related actions have an important role from both a security and an economic point of view. In the present work an activity of inspection and monitoring of the tracks of a main railway line characterized by low radius curves is shown, in order to find a correlation between measurements of rail gauge face wear obtained automatically and a set of parameters including the PK, the curve radius, the gauge, the application of ultra-hard rails (obtained with naturally cooled alloy steel or with thermally treated railhead), the use of trackside lubricators, the data of traffic (cant excess or deficiency), any other critical points in the track or layout geometry.