Improvement of die life in the hot forging of brass alloys is considered vital from both technical and economical points of view. In this research, pin-ondisc tests were carried out at a range of temperatures to evaluate the influence of plasma nitriding and duplex nitriding-physical vapour deposition (PVD), including TiN-TiAlN and TiN-TiAlN-CrAlN coatings, on the tribological properties of AIS...

The influence of plasma nitriding and gas processes on the change surface roughness dimensional accuracy 42CrMo4 steel was investigated in this paper. Both almost always led to changes texture. After nitriding, clusters nitride ions were formed steel, while very often new creation a formation “plate-like” In both cases these processes, compound layer specific thickness formed, although paramete...

In this work, plasma nitriding treatments were performed on ferritic/martensitic stainless steel type 410S at 400 ºC (Low-temperature Plasma Nitriding - LTPN) and 530 (Conventional CPN). The carried out under a 75% N2 -25% H2 gas mixture for 20 hours. After LTPN, layer composed of expanded ferrite/martensite with minor fraction iron nitrides was obtained. CPN, the nitrided surface consists an ...

The residual stress and hardness generated by the nitriding process are important parameters for increasing bending fatigue strength to Ti-6Al-4V. Therefore, this research is focused on analysis of hardness, including surface morphology microstructure at different times temperatures. plasma temperatures 750 °C 800 with 5 h 10 were selected in research. After nitriding, material would have compr...

We report the template-free synthesis of Ta3N5 nanorod array films grown on Ta foil by a combination of a vapor-phase hydrothermal process and subsequent nitriding. The Ta3N5 nanorod array film modified with Co(OH)x when used as a photoanode in a photoelectrochemical cell for water splitting yields a stable photocurrent density of 2.8 mA cm(-2) at 1.23 VRHE under AM 1.5G simulated sunlight. The...

A systematic study was carried out to investigate the potential of manganese nitride related materials for ammonia production. A-Mn-N (A= Fe, Co, K, Li) materials were synthesised by nitriding their oxide counterparts at low temperature using NaNH2 as a source of reactive nitrogen. The reactivity of lattice nitrogen was assessed using ammonia synthesis as a model reaction. In the case of Mn3N2,...

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...

The precipitation of tungsten nitride upon internal nitriding of ferritic Fe0.5 at.% W alloy was investigated at 610 °C in a flowing NH3/H2 gas mixture. Different tungsten nitrides developed successively; the thermodynamically stable hexagonal δ-WN could not be detected. The state of deformation of the surface plays an important role for the development of tungsten nitride at the surface. The m...

The article presents a selected area of research and development concerning the methods of material analysis based on the automatic image recognition of the investigated metallographic sections. The objectives of the analyses of the materials for gas nitriding technology are described. The methods of the preparation of nitrided layers, the steps of the process and the construction and operation...