| 摘要 |
<p>An Al alloy for head drum is characterized by its composition of 6-14 wt.% Si, 1.5-2.5 wt.% Cu, 0.5-1.0 wt.% Mg, 0.1-0.3 wt.% Ti, 0.04- 0.1 wt.% Sr, 0.01-0.1 wt.% Fe, and balance Al. In methods for the fabrication of Al alloy for head drum of DAT, a method is characterized by (1) melting mother alloy with some alloying elements at 700-800 deg.C; (2) casting it at 700 deg.C and cooling down at a speed of 30 deg.C/sec; (3) cold-forging it; (4) after solid solution treatmenr at 500-520 deg.C for 1hr, aging it at 165-175 deg.C for 8 hrs. It has advantages of grain refinging of Si and enhancing wear resistance property and glassy machinability. It is applied for head drum of DAT recorder operated under severe condiutions.</p> |
