| 摘要 |
PROBLEM TO BE SOLVED: To provide a cold rolling method for a strip, enabling a dull steel plate to be manufactured that excels in clarity and slidability at machining as compared with a conventional product. SOLUTION: Dull rolls 8, 7 are set in the last stand 6 and in a stand 5 immediately before the last stand respectively in a tandem rolling mill, dull rolling is performed in these two stands. The surface roughness of the dull roll 8 in the last stand 6 is desirably made smaller than that of the dull roll 7. As a result, PPI is made larger while the height of the ruggedness formed on the steel plate surface is maintained at a required level, thereby the dull steel plate can be obtained that excels in the clarity and the slidability at the machining. COPYRIGHT: (C)2004,JPO
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