Abstract
The article presents the results of a study on the effect of isothermal holding of indefinite chill cast iron used for the working layer of double-layer rolling mill rolls. It is shown that isothermal holding at high temperatures, which occurs during the manufacture of a rolling mill roll, particularly during the pouring of the core metal, affects the abrasive wear resistance of the alloy. The effect of the final heat treatment—tempering—on the abrasive wear resistance coefficient of the investigated alloys was also studied. Mottled chromium-nickel cast iron additionally alloyed with vanadium, including nitrided vanadium, at concentrations of up to 0.5% was selected as the material for the study.
Keywords:
rolling mill roll, working layer, graphitization, tempering, abrasive wear resistance.