| 摘要 |
PURPOSE:To obtain titled copper and copper alloy which decreases the generation of flow marks and earing as far as possible by roughening the surface of the copper (alloy) with a rolling roll having the roughened surface. CONSTITUTION:The copper or copper alloy is rolled by, for example, a steel roll of which the surface is roughened by a means such as shot blasting and the surface thereof is roughened in the following manner: The surface roughness of the rolling plate is so adjusted that the maximum peak-to-valley height Rmax of 1 inch length in at least the direction parallel and perpendicular to the rolling plate is 2mum or above and that the number of peaks and valleys having >=25mu inch height within 1 inch length is >=25 pieces. As a result, the flow marks are hardly generated in the stage of deep drawing and therefore the copper and copper alloy for deep drawing which eliminate the need for polishing and improve productivity are obtd. |
