| 摘要 |
PROBLEM TO BE SOLVED: To obtain a thin rolled product and an extremely thin rolled product having very high reference surfaces and inside quality by allowing at least a part of a finishing pass to occur in ferrite step or austenite step as necessary. SOLUTION: In a finishing line 10, a finishing row 19 which is composed of blocks 19a and 19b, is provided, and a temperature adjusting and adjusting device 24 is provided between them. In the production of the product 1.0 to 1.5 mm in thickness or over, the finished product goes out from the first block 19a, is cooled in the temperature adjusting and adjusting device 24, and next, is wound on a coil. For the extremely thin product 0.6 to 0.7 mm in thickness, the product 1.0 to 1.4 mm in thickness goes out from the first block 19a, and next, after it has been cooled in the temperature adjusting and adjusting device 24 by which an allotropic transformation from phaseγto phaseαoccurs, it is rolled to a desired thickness in the second block 19b. Since the pass of a final rolling down is applied to the product which is in the ferrite stateα, a pickling treatment is performed to the product.
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