Surface Durability of Tufftrided Steel Roller

Abstract

In this report, tufftrided steel rollers having four kinds of hardened depths are tested under two kinds of relative radii of curvature using sliding rolling contact fatigue testing machines, and effects of tufftrided depth and relative radius of curvature on surface durability and surface failure of these rollers are experimentally made clear. These experimental results are discussed in terms of amplitude of ratio of stress to hardness, and it is confirmed from the calculation of this amplitude that the dominant mode in the surface failures of the tufftrided rollers is spalling and the surface durability tends to increase as the tufftrided depth increases and as the relative radius of curvature decreases.