Evaluation Method of Hot Wear Test of Work Roll Material in Hot Rolling Mill

It is important to clarify the characteristic of wear and surface deterioration of the work roll that affected by severe and complex heat and load cycles in the hot strip rolling. To investigate characteristic of wear twin-disc-type high temperature wear testing machine is used. However, specifications of the testing machine vary each institution. We compared the specifications and designed and fabricated a testing machine. High temperature friction and a wear property of High-nickel grain (HiGr) and high speed steel (HSS) were investigated. The amount of wear loss of HSS was about one third of HiGr. The wear rate is defined as a wear loss per unit sliding distance on test discs. Comparing the wear rates with the past literature, it was confirmed that the influence of the temperature is larger than the contact load and the rolling speed.