Abrasion Wear Resistance of Ni - Mo Alloyed High-Chromium Cast Iron

Abstract

The paper presents the results of research on the high-chromium cast irons of chemical composition (in wt. %) 2-4 C, 21-22 Cr, 1-2 Mo, 5-6 Ni, 1 Mn with the trace amount of Ti and. The cast irons were examined in the as-cast state and after heat treatment which comprised the austenitizing at temperature of 900°C for 1 hour and cooling to room temperature in air, followed by tempering at 450 or 600°C for 6 hours and cooling in air. The abrasion resistance of cast irons was evaluated using the pin-on-disk method under the dry abrasion conditions. Tests showed the as-cast chromium cast irons with mostly austenitic matrix have proven the higher abrasion resistance than those after destabilization treatment and tempering.