A comprehensive study of pulsed nitriding in AISI H13 tool steel at low temperature (400°C) is reported for several durations. X-ray diffraction results reveal that a nitrogen enriched compound (-Fe2-3N, iron nitride) builds up on the surface within the first process hour despite the low process temperature. Beneath the surface, X-ray Wavelength Dispersive Spectroscopy (WDS) in a Scanning Elec...

The surface modification processes such as hard facing, case carburizing, thermal spraying, ion nitriding, tough nitriding, and others, are some of the important techniques being adopted for providing enhanced life for parts and components, in service. Among them, plasma spray and High Velocity Oxy Fuel (HVOF) spray coatings are popular and widely used. In this investigation, plasma & High Velo...

In this paper active screen plasma nitriding (ASPN) is used to chemically modify the surface of UHMWPE. This is an unexplored and new area of research. ASPN allows the homogeneous treatment of any shape or surface at low temperature; therefore, it was thought that ASPN would be an effective technique to modify organic polymer surfaces. ASPN experiments were carried out at 120 °C using a dc plas...

An alternative, subcritical-temperature austenitic nitriding process is evaluated in this paper with the purpose of accelerating the treatment cycle, optimizing the hardness gradient in nitrided layers and seeking improved process control. Comparing to the conventional nitriding processed at ferritic temperature and followed by slow cooling, the alternative process includes nitriding at elevate...

Abstract This article presents the effect of an Indirect Plasma Nitriding process on microstructure and properties Titanium Grade- 2 samples manufactured by Direct Metal Laser Sintering Method (DMLS). It was determined, based morphological analysis that physical chemical phenomena occurring at surface during nitriding has a decisive roughening. Phase stress shown nitrided layer produced in pure...

H-13 steel surface was duplex-treated using Plasma Nitriding (PN) and PVD coatings to solve the thermal fatigue problem faced in die-casting applications. Chromium-based multilayer CrN/Cr (m-CrN) multi-component aluminium–titanium-based AlTiN (m-AlTiN) were deposited a cathodic arc deposition technique after plasma nitriding with different case-depths of 50 µm 200 µm. The structural, tribologic...