| 摘要 |
PURPOSE:To produce steel foil having excellent workability, corrosion resistance, paintability, adhesiveness of an adhesive agent, etc., by heating and annealing the steel foil produced by cold rolling to the recrystallization temp. or above then subjecting the steel foil to liquid honing and dry shot peening and forming further a chemical conversion treatment film thereto. CONSTITUTION:The steel foil rolled by cold rolling to 10-100mum thickness is held intact or the surface thereof is cleaned by a method such as electrolytic cleaning. Such steel foil is continuously heated and annealed to the recrystallization temp. or above by direct conduction of electricity thereto or electric induction heating, etc. to improve deep drawability. The steel foil is then subjected to the liquid honing or dry shot peening by a chemical conversion treating liquid of phosphate and chromic acid, etc. contg. SiC, SiO2 and other polishing agents so that adequate tension is added to the surface. The steel foil is successively electrolytically treated in the liquid honing liquid or is subjected to the chemical conversion treatment to form a chemical conversion film thereon after the dry shot peening, by which the corrosion resistance and the adhesiveness to the paint and adhesive agent are improved as well.
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