Metal treatment – Process of modifying or maintaining internal physical... – Heating or cooling of solid metal
Patent
1997-03-11
1998-08-25
Yee, Deborah
Metal treatment
Process of modifying or maintaining internal physical...
Heating or cooling of solid metal
148633, 148634, 266251, C21D 9573, C21D 9667
Patent
active
057980071
ABSTRACT:
Process for the continuous heat treatment of a metal strip, the latter travelling through a furnace, which is thermally insulated, and in a protective atmosphere; the said furnace consisting of at least one section, for heating, for temperature hold and for cooling; the said strip being guide by a plurality of rollers arranged especially in the lower part and in the upper part of the said sections, so as to form a plurality of runs, wherein the strip passes through at least one partial or total isolating device positioned within at least one section or between two sections, so as to ensure different heat transfer properties on the strip compared with at least one other adjacent section having a different atmosphere, by adjusting the composition of the atmosphere consisting of a gas mixture whose hydrogen or helium content exceeds 5% and more particularly 15%, in order to allow differentiation of the thermomechanical properties of the atmosphere.
REFERENCES:
patent: 3950192 (1976-04-01), Golland et al.
2326 HTM Harterei-Technische Mitteilugen 50 (1995).
Boyer Michel
Nozieres Jean-Jacques
Behr Esq. Omri M.
Stein Heurtey
Yee Deborah
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