| Issue |
Rev. Met. Paris
Volume 93, Number 7-8, Juillet-Août 1996
|
|
|---|---|---|
| Page(s) | 923 - 934 | |
| DOI | https://doi.org/10.1051/metal/199693070923 | |
| Published online | 18 January 2017 | |
Possibilities and limits of the 100 % H2 annealing process*
Possibilités et limites du recuit sous hydrogène pur
New developments in batch-annealing technology in terms of thermal heat exchanges have improved the performances of bell type annealing furnaces.
By adjusting the composition of the protective atmosphere and the efficiency of the thermal flow in the cover, it is possible to improve the temperature homogeneity inside the coil and so the consistency of the mechanical properties. The use of pure hydrogen as protective atmosphere gives also the possibility to increase the surface cleanliness of the steel strips by improving the removal of the rolling oil residue during annealing.
Based on industrial trials carried out on instrumented coil annealed in different protective atmospheres, the present paper is mainly aimed at analyzing the gas metal reactions occurring during batch annealing with a special emphasis to the surface depollution reactions.
© La Revue de Métallurgie 1996
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