| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.20 ( June 1989 ) Information Systems ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Development of High Image Clarity Steel Sheet LASERMIRROR Kusuo Furukawa, Kozo Tsunoyama, Makoto Imanaka, Akira Kishida, Yasuhiro Yamada, Hiroshi Tsunekawa |
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Synopsis : Controlling surface roughness of cold-rolled steel sheets as well as the paint coating technique itself is quite important in obtaining high image clarity of car outer panels. Surface roughness of cold-rolled steel sheets is usually produced by temper rolling using roughened dull rolls which is conducted by the shot-blasting or electrodischarge texturing technique. It is however, found that roughness patterns by these methods are substantially random and leaves behind waviness which deteriorates image clarity even after paint coating. By the application of laser textured roll which consists of numerous micro-craters formed by chopped laser beams, distinctness of image is much improved through elimination of waviness and providing a flat area on the steel surface. Based on this understanding, high image-clarity cold-rolled steel sheet LASERMIRROR has been developed and already applied to many passenger car outer panels. |
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