Effect of Nitriding Process on Wear Behavior of Dual Phase (Ferrite+Martensite) Ductile Cast Iron

In this study, it was aimed to improve the surface hardness by applying gas nitriding treatment dual-phase ductile cast iron and produce irons with a good strength-ductility combination. Thus, has been tried develop high wear resistance, strength, ductility. Ductile specimens microstructure consisting of ferrite + martensite were produced oil quenching at 70 °C after intercritical austenitizing 800 ⁰C in austenite zone. Instead tempering process, applied 560 for 540 minutes. The process required be martensitic structure also performed hard 10 µm thick nitride layer obtained on surface. Optical microscope XRD analysis microstructural characterization nitrided specimens. properties tested tribometer. For comparison reasons, tests non-nitrided iron. iron, microstructures consist (10 white layer) tempered (43% volume fraction) center can from treatment. Surface 510 HV 193 353 austempered KGDD obtained. lowest weight loss coefficient friction highest values resistance is 2 times higher than that