Predicting maintenance for train tracks
Friction modifier on the train wheel/rail interface: what are the effects?
ProRail commissioned DEKRA Rail to conduct laboratory research into the application of friction modifier (a type of lubrication) to the train wheel/rail interface. What effect does this have on rail and wheel wear? And what negative effects can result from applying too much friction modifier to the rail?
DEKRA Rail employees carried out a study using a two-disc testing setup, which allowed them to examine the interaction between the wheels and the rails under realistic conditions. The testing combined high slip with high normal pressure, as occurs when a train travels over a railway switch.
Research results
The study provided a quantitative insight into the effect on wear reduction. Among other things this confirmed that, in reality, under high stress conditions the excessive application of friction modifier can lead to spalling damage of the running surface. This research has helped to further the understanding of the effects of wheel/rail lubrication and also the parameters for the optimal use of the lubrication in practice.
Curious about how our test laboratories provide you with important insights into friction phenomena and wear processes?