| 摘要 |
<p>Disclosed is a spool valve (1) which is to be disposed in a hydraulic line (21) and serves to open or close an oil passage (22) when slid in the hydraulic line (21). The spool valve (1) comprises an aluminum alloy containing, in terms of mass%, 3.0-17.0% Si, 0.5-5.0% Cu, up to 0.5% Mn, and 0.02-1.5% Mg, with the remainder being Al and incidental impurities. The spool valve (1) has undergone a T6 treatment or T8 treatment for hardening by accelerated aging, and has undergone no surface treatment.</p> |
