B - Operations – Transporting – 21 – C
Patent
B - Operations, Transporting
21
C
29/51, 149/9
B21C 43/00 (2006.01) B21B 45/06 (2006.01) B21B 1/28 (2006.01)
Patent
CA 1268932
ABSTRACT OF THE DISCLOSURE A cold-rolled strip manufacturing apparatus, in which a continuous cold reduction mill and a continuous annealing furnace are directly linked together, has a tension-leveller-type scale breaker for elongating hot- rolled breakdown by not more than 7 percent, a scale scrubbing brush unit and an immersion-type continuous pickling tank installed upstream of the continuous cold reduction mill. Descaling of the hot-rolled breakdown is carries out by breaking the mill scale formed on its surface by causing the running breakdown to elongate and then removing the broken scale from the surface. Percent elongation is feedforward controlled on the basis of the manufacturing conditions of the hot-rolled breakdown and/or the properties and quantity of the mill scale formed. In another descaling method, percent elongation is feedback controlled on the basis of the condition of scale breaking and removing that is detected during the period in which the mill scale is broken and removed.
504111
Chikazawa Bunichiro
Hioki Yoshihiro
Ichida Kozaburo
Kawasaki Yoshiki
Ohno Yuichi
Fetherstonhaugh & Co.
Nippon Steel Corporation
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