The magnetic properties of steel after the gas nitriding process

2017 ◽  
Vol 1 (4) ◽  
pp. 16-22
Author(s):  
Jerzy Michalski
Keyword(s):  
Magnetic Properties ◽  
Nitriding Process ◽  
Gas Nitriding

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

HAYNES NS-163 Alloy: A Novel Nitride Dispersion-Strengthened CO-Base Alloy

2017 ◽  
Vol 139 (7) ◽  
Author(s):  
Michael G. Fahrmann ◽  
Vinay P. Deodeshmukh ◽  
S. Krishna Srivastava
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Oxidation Resistance ◽  
Base Alloy ◽  
Nitriding Process ◽  
Dispersion Strengthening ◽  
Annealed Condition ◽  
Gas Nitriding ◽  
Diffusion Controlled ◽  
Structural Applications

HAYNES® NS-163® alloy was developed by Haynes International Inc., Kokomo, IN, for high-temperature structural applications by pursuing a dual manufacturing approach: the fabrication of components in the readily weldable and formable mill-annealed condition, and their subsequent strengthening by means of a gas nitriding process. The latter process results in dispersion-strengthening by virtue of formation of internal nitrides. Since this process is diffusion-controlled, component section thicknesses are limited to approximately 2.0 mm (0.080 in.). Microstructures and mechanical properties of nitrided sheet samples are presented. Oxidation resistance and the need for coatings at temperatures exceeding 980 °C (1800 °F) are addressed as well.

scholarly journals Analysis and Optimization of Thermodiffusion of an FBG Sensor in the Gas Nitriding Process

Micromachines ◽  
2016 ◽  
Vol 7 (12) ◽  
pp. 227 ◽  
Author(s):  
Tso-Sheng Hsieh ◽  
Yi-Chian Chen ◽  
Chia-Chin Chiang
Keyword(s):  
Nitriding Process ◽  
Gas Nitriding ◽  
Fbg Sensor

Application of technical nitrogen during gas nitriding austenitic steels

2021 ◽  
Vol 26 (2) ◽  
pp. 5-15
Author(s):  
Tadeusz Żółciak ◽  
Paweł Bilski
Keyword(s):  
Mole Fraction ◽  
Oxygen Potential ◽  
Austenitic Steels ◽  
New Method ◽  
Nitriding Process ◽  
Nitriding Temperature ◽  
Safety Control ◽  
Gas Nitriding ◽  
Gas Atmosphere

The possibility of using technical nitrogen including 0,2% O2 for activation austenitic steels surfaces during gas nitriding were investigated. By changing mole fraction of technical nitrogen i NH3 /N2t mixture one can regulate oxygen potential of gas atmosphere during heating the steel to nitriding temperature and sometimes during nitriding process. Four representative austenitic steels were nitrided with good results at 570°C and under 450°C. New method can be alternative to regulating oxygen potential by air and allows avoiding installing of firing mechanism and safety control.

Gas nitriding – process control and nitriding non-ferrous alloys

2001 ◽  
Vol 17 (1) ◽  
pp. 41-54 ◽  
Author(s):  
◽  
B. Reinhold ◽  
K. Wilsdorf
Keyword(s):  
Process Control ◽  
Nitriding Process ◽  
Ferrous Alloys ◽  
Gas Nitriding
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