Effects of Cr 3 C 2 addition on the erosion–corrosion behavior of Ti(C,N)-based cermets

Abstract

The effect of Cr3C2 addition on the erosion–corrosion behavior of Ti(C,N)-based cermets was investigated. The results indicate that the erosion–corrosion resistance of cermets is significantly enhanced by Cr3C2 addition due to corrosion resistance and mechanical property improvement. Strengthening of Ni binder phase by Cr atoms dissolution also contributes to the improvement in erosion–corrosion resistance of cermets. With the increase of Cr3C2 content, the erosion–corrosion behavior of cermets is classified to corrosion regime, erosion affected corrosion regime, corrosion affected erosion regime and erosion regime. The corrosion resistance of binder plays an important role in the erosion–corrosion degradation of cermets. Erosion damage is covered by severe corrosion of binder phase for the cermets with low Cr3C2 addition, while for the cermets containing high Cr3C2 content, the material deterioration is governed by the mechanical impingement of solid erodents.