Abstract
Ion nitriding is one of the surface modification processes to obtain better wear resistance of the component. Maraging steel (250 Grade) is used to manufacture a critical component in the control surface of a combat aircraft. This part requires high strength and good wear resistance. Maraging steels belong to a new class of high strength steels with the combination of strength and toughness that are among the highest attainable in general engineering alloys. Good wear resistance is achieved by ion-nitriding (also called as plasma nitriding or glow discharge nitriding) process of case nitriding. Ion-nitriding is a method of surface hardening using glow discharge technology to introduce nascent (elemental) nitrogen to the surface of a metal part for subsequent diffusion into the material. In the present investigation, ion-nitriding of Maraging steel (250 grade) is carried out at 450°C and its effect on microstructure and various properties is discussed.
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