Effect Of TiC Addition On Wear, Corrosion And Oxidation Behavior Of High Chromium Cast Iron

The strengthening mechanisms in High Chromium Cast Iron (HCCIs) tends to introduce anisotropic properties in the composite. To address this, the present study employed a vacuum metallurgy furnace with precise temperature control to prepare HCCIs-based composite materials fused with TiC. The resulting composites were then evaluated for their wear resistance and corrosion resistance. Experimental results indicate that incorporating approximately 10%TiC in the wear resistance experiment enhances the wear resistance of as- cast HCCIs by over 60%, reducing the wear rate to 5 cm3/cm 3 /cm x 10-8. - 8 . Among the tested specimens, A3 and R2 exhibit the highest wear resistance under a 10 N load, with scratch widths measuring only 0.13 mm and 0.14 mm, respectively. With a load of 30 N, specimens A3 and R3 display the narrowest and shallowest scratches in terms of both depth and width. Furthermore, the rapid increase in friction coefficient is attributed to the strong adhesion between the contact surface and is closely linked to the hardness and roughness of said surface. During corrosion resistance experiments, specimen A0 demonstrates the largest impedance value at the same frequency, reaching up to 5.8 ohm - cm2. 2 . The degree of oxidation increases with the rise in the number of carbides within the composite, resulting in a significant weight gain over time. In conclusion, increasing the TiC content in HCCIs-based composite materials enhances their wear resistance while reducing their susceptibility to corrosion. Within an acceptable range, these composites hold great potential for applications in friction and wear conditions.