Improved Wear and Corrosion Resistance in TiC-Reinforced SUS304 Stainless Steel

Herein, the vacuum arc-melting process is applied to incorporate various amounts of Ti and C into SUS304 austenitic stainless steel based on high-entropy alloy concept obtain wear- corrosion-resistant alloys with in situ carbide reinforcements. Five compositions containing equivalent 5, 10, 15, 20, 25 volume percentages TiC steel, named A1, A2, A3, A4, A5, respectively, were designed, melted, solidified by method. Microstructural analyses, hardness measurements, immersion tests four corrosive solutions, electrochemical measurements a 3.5 wt % NaCl(aq) solution, tribological conducted determine properties explain relevant mechanisms. A1 exhibited eutectic structure between FCC dendrites, while A5 possessed proeutectic dendritic TiC, dendrites enveloping structure. represents optimal composition. Its hardness, wear resistance, corrosion resistance are 2, 14, 4 times higher than those SUS304, respectively. Additionally, its 2.5 that high-chromium cast iron. Consequently, could have 2.5-fold longer lifetime operation. Therefore, be potentially abrasive environments, such as rotary shafts, rotors, bearings, structural parts food, chemical, optoelectronic industries.