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AssigneeJfe Steel Corporation
InventorsYukihiro SHINGAKI, Junichi TORIU, Ayaka YOSHIKAWA
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Provided is an annealing facility that contributes to further improvement of magnetic properties by more active control of carbon in steel. An annealing facility includes a heating zone, a soaking zone, and a cooling zone on a conveyance line for a steel strip. The conveyance line is capable of passing a steel strip with a thickness of 2.8 mm or more, the soaking zone has means for maintaining an ambient temperature at 900° C. or higher, the cooling zone has means for supplying a refrigerant to the steel strip and maintaining an average cooling rate of 50° C./s or higher in a temperature region of 750° C. or lower and 120° C. or higher, and the annealing facility includes removal means for removing the refrigerant on an exit side of the cooling zone.
An annealing facility comprising a heating zone, a soaking zone, and a cooling zone on a conveyance line for a steel strip, wherein the conveyance line is capable of passing a steel strip with a thickness of 2.8 mm or more, the soaking zone has means for maintaining an ambient temperature at 900° C. or higher, the cooling zone has means for supplying a refrigerant to the steel strip and maintaining an average cooling rate of 50° C./s or higher in a temperature region of 750° C. or lower and 120° C. or higher, and the annealing facility comprises removal means to remove the refrigerant on an exit side of the cooling zone.
Dependencies are inferred from the claim text.