In order to clarify the effect of contact load and lubrication conditions on wear amount and plastic flow in the subsurface layer of a contact rotating roll, the experiments for contact rotating of two disks were made under the lubrication condition of water and 5% solution of lubricant. As a result, it has been found that the wear amount of a roll disk decreases with the increase of contact load, and that the engineering shear strain on the surface of the roll disk under the condition of water is about one and a half times larger than that under the condition of 5% solution of lubricant in the case of 12.5kN contact load.
