Paper Title:
Structural Characterization of Titanium Nitride Coatings on AISI M2 Steel
  Abstract

In this work, some surface properties of AISI M2 steel were improved by a thermoreactive deposition process. Gas nitriding was realized on AISI M2 steel at 550°C for 2 h in an ammoniac atmosphere and then, titanizing treatment performed on pre-nitrided steel in the powder mixture consisting of ferro-titanium, ammonium chloride and alumina at 1000°C for 1-4 h. Structural characterization of titanium nitride layer formed on the surface of AISI M2 steel was carried out by using optical microscopy, scanning electron microscopy, electron microprobe and Xray diffraction (XRD) analysis. The hardness measurements of titanium nitride layer were conducted under 10 g loads by using Vickers microhardness indenter. Structural analysis studies showed that titanium nitride layers formed on the AISI M2 steel samples were smooth, compact and homogeneous. XRD analysis show that the coating layer formed on the steel samples includes TiN, Fe6Mo7N2, C0.7N0.3Ti, C0.3N0.7Ti and V2N phases. The hardness of titanium nitride layers formed on the steel samples is between 2040±186 and 2418±291 HV0.01. The thickness of titanium nitride layer formed on the steel samples ranged from 3.86±0.43 9m to 6.13±0.47 9m, depending on treatment time.

  Info
Periodical
Edited by
Hasan Mandal
Pages
219-224
DOI
10.4028/www.scientific.net/MSF.554.219
Citation
G. Deniz, S. Sen, U. Sen, "Structural Characterization of Titanium Nitride Coatings on AISI M2 Steel", Materials Science Forum, Vol. 554, pp. 219-224, 2007
Online since
August 2007
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$32.00
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Authors: Hai Zhi Li, Wei Ping Tong, Liang Zuo
Chapter 2: Contributed Papers
Abstract:A composite surface layer was fabricated on a high-vanadium alloy steel (HVAS) plate by means of a surface gas nitriding at 550°C for 70h....
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