An investigation of friction characteristic of steels under rolling–sliding condition

A reciprocating rolling–sliding test apparatus was developed based on a tension–compression hydraulic machine with a high precision, and a number of tests have been carried out using the new test apparatus. Through the tests and the test result analysis, interesting conclusions were obtained. The friction coefficient varies when a test element begins to roll from rest. The wear mechanisms were changed with an increase in the number of the tangential friction force or an increase of cycles in rolling contact.