Plasma-nitriding of tool steels for combined percussive impact and rolling fatigue wear applications

Plasma-nitriding of tool steels for combined percussive impact and rolling fatigue wear applications

Plasma-nitriding is a flexible, multifunctional case-hardening technology. In the present investigation, this technique was applied to increase the compound percussive impact and rolling contact fatigue resistance of steel-plant hot-rolling-mill components, made out of AISI H13 and D2 grades of tool...

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Veröffentlicht in:Surface & coatings technology 1998-08, Vol.107 (1), p.55-64
Hauptverfasser: Devi, M.Uma, Mohanty, O.N.
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Exact sciences and technology
Heat treatment
Metals. Metallurgy
Percussive impact
Plasma-nitriding
Production techniques
Rolling fatigue wear
Thermochemical treatment and diffusion treatment
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creator Devi, M.Uma
Mohanty, O.N.
description Plasma-nitriding is a flexible, multifunctional case-hardening technology. In the present investigation, this technique was applied to increase the compound percussive impact and rolling contact fatigue resistance of steel-plant hot-rolling-mill components, made out of AISI H13 and D2 grades of tool steel. Plasma-nitrided layers were characterized by optical and scanning electron microscopy, microhardness measurements, and phase analysis and residual stress determination using X-ray diffraction techniques. The service life of the components was determined in the real plant operation. Plasma-nitriding improved the service life by two- to 3.6-fold, depending upon the type of steel and the components' contact surface geometry. Redesigning of the surface/subsurfaces by plasma-nitriding coupled with appropriate selection of substrate enhanced the service life of the component by up to sevenfold. The service life was examined in relation to nitrided layer characteristics, and the importance of residual stresses and surface microstructure are highlighted.
doi_str_mv 10.1016/S0257-8972(98)00546-5
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source Elsevier ScienceDirect Journals
subjects Applied sciences
Exact sciences and technology
Heat treatment
Metals. Metallurgy
Percussive impact
Plasma-nitriding
Production techniques
Rolling fatigue wear
Thermochemical treatment and diffusion treatment
title Plasma-nitriding of tool steels for combined percussive impact and rolling fatigue wear applications
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