| 摘要 |
PURPOSE:To obtain an Al alloy excellent in machinability, wear resistance, and corrosion resistance and having superior forgeability as a material for contact parts for magnetic tape, by providing a composition containing each prescribed amount of Si, Mg and Cu and having the balance consisting of Al and impurities. CONSTITUTION:The Al alloy has a composition consisting consisting of, by weight ratio, 6.0-13.0% Si, 4.0-7.0% Mg, 2.6-4.0% Cu, and the balance Al with impurities. This Al alloy combines wear resistance and machinability which are essentially conflicting with each other in alloy material, and the also has strength characteristics sufficient to be used as contact parts for magnetic tape for V.T.R., etc. Moreover, this Al alloy is excellent in corrosion resistance under high temp. and humidity and is reduced in coefficient of dynamic friction with tape and, moreover, it has a characteristic of forming highly volatile finished parts surface, etc.
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