Metal treatment – Process of modifying or maintaining internal physical... – Magnetic materials
Patent
1986-01-09
1988-02-16
Brody, Christopher W.
Metal treatment
Process of modifying or maintaining internal physical...
Magnetic materials
148156, C21D 1100
Patent
active
047253215
ABSTRACT:
The present invention relates to a method for cooling a steel strip in a continuous-annealing furnace. Conventionally, the steel strip 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 invention attains uniform cooling by means of feedback-feedforward control, in which the blowing width of the gas-jet cooler (21, 53) is controlled by detecting the sheet temperature distribution with thermometers (24, 55, 60).
REFERENCES:
patent: 4415382 (1983-11-01), Gaskey et al.
patent: 4422623 (1983-12-01), Kuroda et al.
Dazai Takeo
Ikegami Hiroshi
Misawa Yasuo
Namba Tadashige
Saitoh Yoshio
Brody Christopher W.
Nippon Steel Corporation
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