| 简介 |
PROBLEM TO BE SOLVED : To propose a method for manufacturing a cold rolled steel sheet, which solves the problem of yellowing in technology of manufacturing the cold rolled steel sheet excellent in chemical conversion properties by performing pickling and re-pickling, and also to provide manufacturing facilities used for the manufacturing method.
SOLUTION : In a method for manufacturing a cold rolled steel sheet, the cold rolled steel sheet is manufactured by performing pickling, re-pickling, rinsing, and drying on a continuously-annealed steel sheet after cold rolling, wherein between the pickling and the re-pickling, and between the re-pickling and the rinsing, preferably water having lower temperature than a pickling solution and a re-pickling solution is sprayed to a steel sheet surface, so that the steel sheet surface is maintained always in wet conditions.
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