The Effect Of Quenching Media On Surface Treatment Process On The Rel UIC R42 (Union Internasionale Des Chemins De Fer-42) Endurance

Abstract

This study aims to find out the use of quenching media during the surface treatment of the UIC R42 railroad. The surface treatment was used to improve the hardness and endurance of the railroad surface to give it better performance. The surface treatment process was done using an automatic flame hardening method with neutral oxy-acetylene for 30 minutes. After heated, the quenching process was carried out to the rail material using various cooling methods; air, water, diesel, oil. The hardness, wear, and microstructure tests were then performed. From the test results, it is known that there is an increase in the hardness level with the highest score of 52,667 HRC in water media. The higher the hardness on the rail surface, the smaller the wear rate is which reached 0.000320642 gr/m. The observation of the microstructure shows there is a change from austenite into martensite.