| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.27 ( November 1992 ) Hot-Rolled, Cold-Rolled and Surface Coated Steel Sheets and Electronics and Instrumentation ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Development of Self-lubricating Steel Sheet "RIVER ZINCiRj FS" Sachiko Suzuki, Nobuo Totsuka, Takao Kurisu, Toshio Ichida, Taizo Mouri |
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Synopsis : The self-lubricating steel sheet RIVER ZINC(R) FS, which obviates the need for oiling and subsequent degreasing in the forming process, is described. This functional pre-coated material is based on an electrogalvanized sheet, which is under-coated with chromate and top-coated with resin containing an organic lubricant. It was found that the powdering phenomenon, which lowers the formability in practical press forming, could be reproduced by a continuous cup-drawing test at a high drawing speed of 500 mm/s. The test results indicate that antipowdering and deep drawability resistance can be achieved by coating with vinyl-acetate-added polyolefin wax at a coating weight of 0.4 to 1.4 g/m2 and then baking at 120 to 180. The resulting self-lubricating steel sheet has excellent press formability in addition to good corrosion resistance, anti-fingerprint quality and good spot weldability. RIVER ZINC FS is particularly suitable for manufacturing electrical appliances. |
| TextiPDF: 7p./343kbj |