Results 111 to 120 of about 284 (161)

A novel duplex plasma treatment combining plasma nitrocarburizing and plasma nitriding

Vacuum, 2016
Abstract In this study, a novel duplex treatment (DT) combining plasma nitrocarburizing (PNC) and plasma nitriding (PN) was primarily developed for AISI 1045 steel. The modified samples were investigated by optical microscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), microhardness test, and pin-on-disk tribotest.
Yating Chai, Kunxia Wei, Jing Hu
exaly   +2 more sources

Plasma and gaseous nitrocarburizing of C60W steel for tribological applications

Vacuum, 2009
Abstract A comparison has been made between plasma and gas nitrocarburizing processes for C60W steel in terms of structural features of the layers and the tribological properties of the specimens. Gaseous treatments were performed in a sealed quench industrial furnace in optimized process cycles.
A Shafyei, F Ashrafizadeh
exaly   +2 more sources

Optimizing the mechanical properties of M50NiL steel by plasma nitrocarburizing

Applied Surface Science, 2014
Abstract In this study, plasma nitrocarburizing at various temperatures in the range of 460–540 °C were carried out on M50NiL steel in order to improve wear properties. The nitrocarburizing temperature was optimized to obtain the best wear properties.
C S Zhang, M F Yan, Z Sun
exaly   +2 more sources

Microstructure of electroplated hard chromium coatings after plasma nitrocarburizing

Surface and Coatings Technology, 2005
Abstract Plasma nitrocarburizing was carried out on the hard chromium coating deposited on SM45C mild carbon steel substrate by electroplating. After plasma nitrocarburizing at 720 °C for 20 h, a 6–7-μm-thick nitride layer consisting of CrN and Cr 2 N was formed on the surface of Cr coating with the microhardness of about 950–1100 HV0.1.
S C Kwon
exaly   +2 more sources

Aging of a Fe-Mn-Al Steel Using Plasma Nitrocarburizing

Materials Performance and Characterization, 2017
Abstract The aeronautics and automotive industries face increasing demands to lower fuel consumption and consequent CO2 emissions. One method of accomplishing this is to use materials with high strength/weight ratio. Alloys of steels using high manganese and aluminum shows promising results, with densities between 10% and 13% lower than ...
G. S. Takeya, F. E. Mariani, L. C. Casteletti, A. N. Lombardi, G. E. Totten   +4 more
openaire   +3 more sources

Surface porosity sealing effect of plasma nitrocarburizing on sintered unalloyed iron

Surface and Coatings Technology, 2001
Abstract The influence of pore size on the sealing of P/M superficial pores as a result of plasma nitrocarburizing has been studied. Samples with different particle size distributions were sintered, resulting in surfaces with different pore sizes. The samples were compacted at 600 MPa and sintered at 1150°C for 1 h.
Aloisio Nelmo Klein
exaly   +2 more sources

Wear behavior of DLC film on plasma nitrocarburized AISI 4140 steel by pulsed DC PACVD: Effect of nitrocarburizing temperature

Diamond and Related Materials, 2015
Abstract DLC films were produced on nitrocarburized AISI 4140 steel at 110 °C by a pulsed DC PACVD method. Plasma nitrocarburizing (PNC) at 500 °C and 550 °C was used as an intermediate layer. SEM, roughness, micro-Raman spectroscopy and XRD analysis were employed to investigate the microstructure, surface roughness, various carbon phases and ...
Mansoureh Ebrahimi, Farzad Mahboubi, M Reza Naimi-Jamal   +2 more
exaly   +2 more sources

Martensite transformation induced by plasma nitrocarburizing on AISI304 austenitic stainless steel

Vacuum, 2014
Abstract In this paper, martensite transformation induced by plasma nitrocarburizing in AISI304 austenitic stainless steel is investigated. The optical micrographs and XRD results indicate the dual-layer structure of the nitrocarburized layer: the outer martensite transformation layer and the inner C supersaturated austenite layer.
H T Chen, M F Yan
exaly   +2 more sources