ALUMINUM-ALLOY SPRING MATERIALS, LEAF SPRINGS MADE OF THE MATERIALS FOR MAGNETIC RECORDING TAPE CASSETTES, TAPE CASSETTES PROVIDED WITH THE LEAF SPRINGS AND PROCESS FOR THE PRODUCTION OF THE MATERIALS

摘要

Aluminum-alloy spring materials which each contain 0.3 to 2.0 wt.% (exclusive of 2.0 wt.%) of Mg, 0.1 to 1.5 wt.% of Si, 0.1 to 3.0 wt.% of Cu and, if necessary, 0.01 to 1.5 wt.% of Mn, and, if necessary as further additional component(s), 0.01 to 0.5 wt.% of Cr, 0.01 to 0.2 wt.% of Zr, 0.01 to 0.2 wt.% of V, 0.01 to 0.2 of Sc, 0.001 to 0.2 wt.% of Ti and/or 0.0001 to 0.05 wt.% of B, with the balance being composed of Al and unavoidable impurities.