C - Chemistry – Metallurgy – 21 – D
Patent
C - Chemistry, Metallurgy
21
D
C21D 9/56 (2006.01) C21D 8/02 (2006.01) C21D 6/00 (2006.01)
Patent
CA 2131282
2131282 9319211 PCTABS00025 The invention concerns a method relating to the manufacturing of steel strips, comprising continuous treatment of the steel strip in an annealing furnace (7) at a temperature exceeding the recrystrallization temperature of the steel. The steel strip (4A) is fed into the annealing furnace at a certain feeding-in rate and is drawn out of the furnace at another, higher feeding-out rate, wherein the steel strip is subjected to a pulling force in the annealing furnace at said temperature exceeding the creep limit of the steel at said temperature, resulting in a permanent stretch (elongation) of the steel strip corresponding to the difference between the feeding-out and feeding-in rates, and in a reduction of the cross section of the strip corresponding to the elongation, including a reduction of the strip thickness as well as of the strip breadth.
Avesta Sheffield Aktiebolag
Borden Ladner Gervais Llp
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