Plasma nitriding is widely used, because it allows controlling the surface microstructure, regarding compound layer formation. Duplex surface treatments are new solutions for tools, combining the advantages of plasma nitriding and PVD coatings looking for a still better performance in service.
Jun 26, 2019 · In the present study, electroless nickelboron coating was deposited on AISI 4140 steel and post-treated under two different conditions. One of the treatments was carried out under a vacuum condition at 400 °C for 4 h, and the other post-treatment was plasma nitriding in an atmosphere comprising 25% N275% H2, at 400 °C, for 4 h. The coated samples were Effect of different nitriding processes on the friction The purpose of this paper is to present the results of a study on friction characteristics of plasma, saltbath and gas nitrided layers produced in AISI 304 type austenitic and AISI 420 type martensitic stainless steels., Plasma nitriding processes were carried out with DCpulsed plasma in 80% N2+20% H2 atmosphere at 450°C and 520°C for 8 h at a pressure of 2 mbar.
However, nitriding is a very promising way to enhance the mechanical and magnetic properties. After low-temperature nitriding at 400 °C it is clear that both - and '-martensite are present in the deformed microstructure, indicating the simultaneous stress-induced and strain-induced transformations of the austenite. Influence of plasma nitriding on fretting wear behaviour Jan 01, 2010 · Plasma nitriding is used to improve hardness and sliding wear resistance of Ti6Al4V , , , , , , . The following parameters influence the plasma nitriding:temperature of nitriding, treatment time, gas mixture in the vessel, gas flow through the vessel, pressure in the vacuum vessel, applied plasma voltage and plasma current density.
In the present study, the austenitic stainless steels AISI 304L and AISI 316L with different microstructures and surface modifications were used to examine the influence of the steel microstructure on the plasma nitriding behavior and corrosion properties. Microstructure Characterization and Corrosion Properties Plasma nitrocarburizing treatments of AISI 4140 low alloy steel have been carried out in a gas mixture of 85% N2-12% H2-3% CO2. All treatments were performed for 5 h at a chamber pressure of 4 mbar. Different treatment temperatures varying from 520 to 620 °C have been used to investigate the effect of treatment temperature on the corrosion and hardness properties and also microstructure
Jan 10, 2020 · Plasma nitriding is a surface treatment process, which can be applied on steel substrates with a wide variety of industrial applications. This study focuses on the properties of plasma nitrided low alloy steel of relatively long-small Plasma Nitriding of ium Alloys IntechOpenMay 20, 2015 · The plasma-nitrided microstructure is strongly correlated with the composition of titanium substrate and the nitriding process parameters such as duration, temperature, pressure, and composition of the nitriding medium, among which temperature has the most significant influence [12, 1517].
May 20, 2015 · The plasma-nitrided microstructure is strongly correlated with the composition of titanium substrate and the nitriding process parameters such as duration, temperature, pressure, and composition of the nitriding medium, among which temperature has the most significant influence [12, 1517]. The Effect of the Plasma-Nitriding Process on the Oct 22, 2018 · After plasma nitriding, the shape and nature of the formed layers in the microstructure of the powders were surveyed by the optical microscope, XRD and EDS, as well as SEM. Also, the wear behavior of the samples under the applied load of
18Ni-300 maraging steel manufactured by selective laser melting was plasma nitrided to improve its wear and corrosion resistance. The effects of a prior solution treatment, aging and the combination of both on the microstructure and the properties after nitriding were investigated. Wear mechanisms and microstructure of pulsed plasma Jul 19, 2010 · On the contrary, plasma nitriding treatments at low temperatures (400 °C) allow to maintain the nano and microstructure on surface and bulk of metallic carbides obtained by the previous heat treatment . Moreover, thinner nitrided layers are specified for duplex processes such as in aluminum injection molds.
Influence of nitriding time on microstructure and properties of AlN nitriding layer formed on 2024 aluminum alloy by plasma-enhanced nitriding have been investigated. Nitriding process can be divided into three stages of incubation period, growth period and stable period. AlN nodules and islands were formed on the surface of aluminum alloy in incubation period. Wear resistance and microstructure of the nitriding layer Request PDF Wear resistance and microstructure of the nitriding layer formed on 2024 aluminum alloy by plasma-enhanced nitriding at different nitriding times Influence of nitriding
Jul 01, 2013 · The oil-quenched 30CrMnSiA steel specimens have been pulse plasma-nitrided for 4 h using a constant 25% N 2 -75% H 2 gaseous mixture. Different nitriding temperatures varying from 400 to 560 °C have been used to investigate the effects of treatment temperature on the microstructure, microhardness, wear, and corrosion resistances of the surface layers of the