Effect of Pre-Oxidation on Plasma Nitrided Steel AISI4140

2020 ◽  
Vol 62 (3-4) ◽  
pp. 224-228
Author(s):  
Lei Tang ◽  
Xiaobing Zhao ◽  
Jingcai Li ◽  
Kunxia Wei ◽  
Jing Hu
Keyword(s):  
Nitrided Steel

Nitride width and microhardness in H-12 ion nitrided steel

1992 ◽  
Vol 15 (1-2) ◽  
pp. 68-72 ◽  
Author(s):  
J.L. Albarran ◽  
J.A. Juárez-Islas ◽  
L. Martinez
Keyword(s):  
Nitrided Steel

scholarly journals THE INFLUENCE OF THE SOAKING TEMPERATURE OF NITRIDED WCL TOOL STEEL (EN-X37CrMoV5-1) ON THE MICROHARDNESS AND TRIBOLOGICAL WEAR OF THE SURFACE LAYER

Tribologia ◽  
2016 ◽  
Vol 268 (4) ◽  
pp. 69-78
Author(s):  
Michał DWORAK ◽  
Adrian BARYLSKI ◽  
Krzysztof ANIOŁEK ◽  
Elizaveta STEPANOVA
Keyword(s):  
Surface Layer ◽  
High Temperature ◽  
Low Temperature ◽  
Tool Steel ◽  
Nitrided Layer ◽  
Industrial Furnace ◽  
Tribological Tests ◽  
Nitrided Steel ◽  
Hot Work Tool Steel ◽  
Soaking Temperature

The present paper refers to the evaluation of the influence of soaking temperature of nitrided hot work tool steel, X37CrMoV5-1 (WCL), intended for dies for extruding aluminium profiles, on the structure, microhardness, and tribological wear of the nitrided layer. The research involved nitrided steel specimens (X37CrMoV5-1) soaked for 8 hours in an industrial furnace at temperatures of 450°C, 480°C, 520°C, 560°C, and 600°C. For comparison purposes, a REFERENCES material was used, which was not soaked after nitriding. Initially, as the soaking temperature raised, the microhardness of the nitrided layer increased by ca. 10%; however, a further increase in the soaking temperature to more than 450°C caused a decrease in the microhardness of the nitrided layer. The results of tribological tests showed that soaking nitrided steel at a low temperature (450°C) and high temperature (600°C) caused a decrease in tribological wear. Out of the tested materials, the highest microhardness of the upper layer was observed in the samples soaked at 450°C, while the highest resistance to tribological wear was obtained for the samples soaked at 600°C. The conducted tests indicate the possibility of extending the lifetime of dies made from the investigated nitrided steel.

Development and study of a material for mechanized welding of basic structures from nonmagnetic high-strength nitrided steel

2011 ◽  
Vol 2 (6) ◽  
pp. 612-617
Author(s):  
G. Yu. Kalinin ◽  
R. V. Bishokov ◽  
P. V. Mel’nikov ◽  
L. A. Berezovskaya ◽  
V. A. Mogil’nikov ◽  
...  
Keyword(s):  
High Strength ◽  
Nitrided Steel ◽  
Mechanized Welding

scholarly journals Plasma electrolytic polishing of nitrided steel under force convection condition

2019 ◽  
Vol 672 ◽  
pp. 012020 ◽  
Author(s):  
P N Belkin ◽  
S A Silkin ◽  
I G Dyakov ◽  
I V Tambovskiy ◽  
S S Korableva ◽  
...  
Keyword(s):  
Force Convection ◽  
Convection Condition ◽  
Electrolytic Polishing ◽  
Nitrided Steel ◽  
Plasma Electrolytic

scholarly journals The influence of laser re-melting on microstructure and hardness of gas-nitrided steel

2016 ◽  
Vol 36 (1) ◽  
pp. 18-22 ◽  
Author(s):  
Dominika Panfil ◽  
Piotr Wach ◽  
Michał Kulka ◽  
Jerzy Michalski
Keyword(s):  
Laser Beam ◽  
Laser Treatment ◽  
Diffusion Zone ◽  
Nitrided Layer ◽  
Nitriding Process ◽  
Beam Power ◽  
Gas Nitriding ◽  
Nitrided Steel ◽  
Laser Beam Power ◽  
And Diffusion

Abstract In this paper, modification of nitrided layer by laser re-melting was presented. The nitriding process has many advantageous properties. Controlled gas nitriding was carried out on 42CrMo4 steel. As a consequence of this process, ε+γ’ compound zone and diffusion zone were produced at the surface. Next, the nitrided layer was laser remelted using TRUMPF TLF 2600 Turbo CO2 laser. Laser tracks were arranged as single tracks with the use of various laser beam powers (P), ranging from 0.39 to 1.04 kW. The effects of laser beam power on the microstructure, dimensions of laser tracks and hardness profiles were analyzed. Laser treatment caused the decomposition of continuous compound zone at the surface and an increase in hardness of previously nitrided layer because of the appearance of martensite in re-melted and heat-affected zones

Laser melting of plasma-nitrided steel samples

1991 ◽  
Vol 45 (1-3) ◽  
pp. 399-402 ◽  
Author(s):  
M.B. Karamis ◽  
B.S. Yilbas
Keyword(s):  
Laser Melting ◽  
Nitrided Steel

Plasma Nitrided Type 349 Stainless Steel for Polymer Electrolyte Membrane Fuel Cell Bipolar Plate—Part II: Nitrided in Ammonia Plasma

2010 ◽  
Vol 7 (2) ◽  
Author(s):  
Heli Wang ◽  
Glenn Teeter ◽  
John A. Turner
Keyword(s):  
Stainless Steel ◽  
Fuel Cell ◽  
Mixed Oxides ◽  
Nitrided Layer ◽  
Polymer Electrolyte Membrane ◽  
Bipolar Plate ◽  
Surface Conductivity ◽  
X Ray ◽  
Electrolyte Membrane ◽  
Nitrided Steel

Austenitic 349 stainless steel was nitrided in an NH3 plasma. A low interfacial contact resistance was obtained with the nitrided steel. Glancing angle X-ray diffraction suggests that the nitrided layer is very thin and possibly amorphous. X-ray photoelectron spectroscopy (XPS) studies show that the nitrided layer is composed of mixed oxides and nitrides of Fe3+ and Cr3+. Contaminations of V and Sn were also observed, though their influence on the as-nitrided surface conductivity is not clear. The nitrided samples were investigated in a simulated polymer electrolyte membrane fuel cell (PEMFC) environment, and showed excellent corrosion resistance. The XPS depth profile indicated that the passive film, which formed on the plasma-nitrided steel in the PEMFC anode environment, is composed of mixed oxides and nitrides, in which chromium oxide/nitride dominates the surface chemistry. No V or Sn was detected on the surface after the polarization tests. For the PEMFC bipolar plate application, nitridation in NH3 plasma is a promising surface treatment approach, though more research is needed to investigate the influence of the plasma density and substrate bias on the surface conductivity and performance of the nitrided steel in PEMFC environments.

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