| 摘要 |
PURPOSE:To attain labor and energy savings by producing a steel foil by a rapid solidification process, subjecting the foil to solution heat treatment according to the ratio of columnar crystals in a solidified structure to the foil thickness, and then applying cold rolling and final annealing to the above. CONSTITUTION:An austenitic stainless steel is subjected continuously to rapid solidification on the surface of a rotating roll, by which a foil is producing. In the above foil, columnar crystals are developed in a direction perpendicular to the normal line of the foil plane. When the proportion of the columnar crystals in the solidified structure to the foil thickness is >=75%, solution heat treatment is applied to the above foil at 1050-1150 deg.C for 2-10min. When the proportion is <75%, the above foil is held in the as-solidified state or is subjected to the above solution heat treatment. Then, the foil is subjected to cold rolling at 50-80% draft and further to final annealing at 1000-1150 deg.C for 0.5-10min. By this method, the austenitic stainless steel foil reduced in anisotropy and excellent in mechanical properties can be produced with high efficiency. |
