Tribological Behavior of Reinforced and Unreinforced High Chromium Cast Iron

In this paper, the metal matrix composites containing ۲۲ wt % Cr, ۲.۵ wt % C and ۲ to ۱۶  volume percent TiC were processed by solidifying Fe-Cr-Ti-C in which precipitation of titaniumcarbide and chromium carbide occurred. The microstructure and abrasion resistance of in-situ synthesized composites were compared with the unreinforced high chromium white cast iron (HCWCI) containing ۲۲ w. t. % Cr and ۲.۵ w. t. % C. SEM, OM as well as abrasion machine test methods which were used for microstructure and wear evaluation of the matrix and reinforcement. As a result, an increase in Ti content, increased the hard TiC volume percent besides the coarse(Fe,Cr)۷C۳ in the ferrous matrix. The increase of the TiC content led to an increase in wear resistance,without any considerable increase in macro hardness.

Keywords:

High Chromium White Cast Iron (HCWCI) , Composite , Abrasion resistance , Titanium Carbide