Nitriding of nanocrystalline iron and reduction nitride with gaseous mixtures hydrogen ammonia were studied at 375 °C atmospheric pressure using the chemical potential programmed reaction (CPPR) method coupled in situ XRD. In this paper, a series phase transitions occurring during processes is shown, detailed analysis composition structure material given. The influence variable nitriding on lat...

AISI 304 SS has good corrosion resistance in a variety of environments but does not have to wear. Aggressive marine require materials that can withstand both the biocorrosion and wear associated with impact waves, ocean currents suspended particles. Oxy-nitriding stainless steels be used increase their hardness resistance. The conventional oxy-nitriding process is lengthy, temperature involved ...

The pure elements Ti, Zr, Cr, Nb were selected to produce an TiCrZrNb alloy target and deposited thin films thereof by a reactive high vacuum DC sputtering process. Nitrogen was used as the reactive gas to deposit the nitride thin films. The effect of nitriding on the properties of the TiCrZrNbNx film was tested by changing the nitrogen ratio of the atmosphere. All of the as-deposited TiCrZrNbN...

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 ...

This work concerns two stages of research into plasma nitriding (change steel and modification parameters). In the first stage, pins obtained from currently used were compared with made an alternative material available on market, using same process parameters. As a result metallographic tests carried out, in case, presence thin, porous, heterogeneous nitrided layer or its absence was found, co...