| 摘要 |
<p>PURPOSE:To manufacture a cold rolled steel strip not having recessed parts without causing holes and reduction at the time of cold rolling by executing lubricated cold rolling after executing non-lubricated cold rolling on a hot rolled steel strip. CONSTITUTION:After grinding surface flaw, the hot rolled strip 11 on which a part of the surface flaw remains as the residual flaw of recessed parts 13, 14 is cold rolled using a cold rolling roll 12. Then, after applying one pass or plural passes of non-lubricated cold rolling to the hot rolled strip 11, one pass or plural passes of lubricated cold rolling is executed. Only the part where the surface flaw is produced of a 3.2mm thick stainless steel strip, for example, is partially ground with the surface grinding line and lubricated cold rolling is executed by a required rolling reduction after executing non-lubricated rolling by a required rolling reduction. In this way, a 0.8mm thick stainless steel strip on which the recessed parts are not present is manufactured without generating the pinching and holes.</p> |
