Paper Title:
Influence of Hydrogen on the Plasmas Nitriding Process of 35CrMo Steel
  Abstract

The mechanism of the formation of active nitrogen atoms and the function of hydrogen molecules for the dissociation of the mixture of nitrogen and hydrogen in the plasma nitriding process are discussed in this paper. The results show that the nitrided case thickness of nitrided samples become thinner and the surface hardness decreases with the increase of cathode voltage. Active nitrogen atoms mainly result from non-elastic collision between positive ions H2+ and neutral particles N2 for N2-H2 mixture plasma nitriding at 550V cathode voltage, the volume percent of e-Fe3N and the superficial nitrogen concentration of plasma nitrided case decrease with the increase of the mixture ratio of N2/H2. However, active nitrogen atoms mainly result from non-elastic collision between energetic positive ions H2+, N2+and neutral particles N2 for N2-H2 mixture plasma nitriding at 650V cathode voltage. The existence of a few of nitrogen molecules makes critical energy of positive ions H2+ dissociating neutral N2 molecules drop to 26.06eV and the cathode voltage threshold value become 490V.

  Info
Periodical
Advanced Materials Research (Volumes 295-297)
Chapter
Chapter 1: Materials Properties
Edited by
Pengcheng Wang, Liqun Ai, Yungang Li, Xiaoming Sang and Jinglong Bu
Pages
1004-1009
DOI
10.4028/www.scientific.net/AMR.295-297.1004
Citation
L. Zhong, X. Han, "Influence of Hydrogen on the Plasmas Nitriding Process of 35CrMo Steel", Advanced Materials Research, Vols. 295-297, pp. 1004-1009, 2011
Online since
July 2011
Authors
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Tadeusz Frączek, Michał Olejnik
Abstract:This work presents the results of investigations of unconventionally glow-discharge nitrided 316L austenitic steel. The process of nitriding...
882
Authors: Feng Tang, Jin Yong Xu, Yan Tang, Cheng Gao, Peng Gao, Bo Gao, Wei Heng Mo, Yuan Ming Li
Chapter 2: Surface Engineering/Coatings
Abstract:The Cu-Ce infiltration layer was formed on 304 Stainless Steel surface by double glow plasma surface metallurgy technology. The effects of...
298
Authors: Keila Christina Kleinjohann, Bruno Borges Ramos, Euclides Alexandre Bernardelli, Ana Maria Maliska
Chapter 6: Coatings and Surface Engineering
Abstract:Aiming to produce a pattern on the surface of austenitic stainless steel, AISI 316L, cylindrical samples were plasma nitrided with copper...
675