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Communication Dans Un Congrès Année : 2007

CHARACTERIZATION BY ELECTRON DIFFRACTION OF OXIDE PARTICLES FORMED DURING ANNEALING

Résumé

In hot-dip galvanizing, before immersion in the bath of molten zinc or zinc alloy, steel sheets are annealed in a H2-N2 atmosphere containing traces of water with a controlled frost point. In addition to recrystallization of the steel substrate and reduction of iron oxides, this heat treatment induces segregation to the surface and the selective oxidation of the less noble alloying elements of the steel such as aluminum, manganese and silicon. Selective oxidation of both Fe-Si (0.1 wt.%) alloy and commercial IF Ti steel was studied with different annealing conditions: a long-time annealing at low frost point (approx. -54°C) in order to favor external selective oxidation and a short-time annealing at higher frost point (approx. -40°C) relevant to galvanizing line practice. The oxide particles were extracted from the surface and characterized by Electron Diffraction in the Transmission Electron Microscope.

Domaines

Matériaux
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Dates et versions

hal-00315655 , version 1 (29-08-2008)

Identifiants

  • HAL Id : hal-00315655 , version 1

Citer

A. Ollivier, M.-L. Giorgi, M. Zaïdi, J.-P. Mazellier, P. Haghi-Ashtiani, et al.. CHARACTERIZATION BY ELECTRON DIFFRACTION OF OXIDE PARTICLES FORMED DURING ANNEALING. Galvatech' 07 - 7th International Conference on Zinc and Zinc Alloy Coated Steel Sheet, Nov 2007, Osaka, Japan. ⟨hal-00315655⟩
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