C - Chemistry – Metallurgy – 21 – D
Patent
C - Chemistry, Metallurgy
21
D
148/54
C21D 11/00 (2006.01) C21D 9/573 (2006.01)
Patent
CA 1224122
- 22 - METHOD FOR COOLING A STEEL STRIP IN A CONTINUOUS-ANNEALING FURNACE ABSTRACT OF THE DISCLOSURE The present invention relates to a method for cooling a steel strip (1) in a continuous-annealig furnace. Conventionally, the steel strip (1) is cooled by a water medium and, thus, oxidation is inevitable. Recently developed roll cooling methods can prevent oxidation but are disadvantageous in that the steel strip (1) is nonuniformly cooled as seen in its short width direction. The present invetion attains uniform cooling by means of feedback control and feedback-feedforward control, in which the blowing width of the gas-jet cooler (21, 53) is controlled by detecting the sheet temperature distribution with a thermometer(s) (24, 55, 60).
456250
Dazai Takeo
Haeno Tsutomu
Ikegami Hiroshi
Misawa Yasuo
Namba Tadashige
Goudreau Gage Dubuc
Nippon Steel Corporation
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