Conference on Abrasion Wear Resistant Cast Iron And Forged Steel For Rolling and Pulverizing Mills – ABRASION 2024

This work contributes to an understanding of the damage mechanisms of roughing mill work rolls by characterization of the oxidation behavior and thermomechanical fatigue of relevant materials as well as the identification of interactions between mechanical loading and environmental impact. A hot working tool steel, which is commonly used as a roughing mill work roll material, and a variant of it with a higher Cr concentration in its martensitic phase were investigated. Experimental parameters were first determined by simulating a roughing mill rolling process in ABAQUS by use of the finite element method (FEM). Oxidation kinetics were determined by thermogravimetry (TGA) in air and in water vapor containing atmosphere. The fatigue behavior of the alloys was studied by carrying out isothermal and thermo¬mechanical experiments in both air and vacuum. Standard experimental techniques such as X ray diffraction (XRD) and scanning electron microscopy (SEM) were used to characterize post-mortem samples and finally compare the observed experimental damage mechanism with the one on real work rolls.