| 摘要 |
PROBLEM TO BE SOLVED: To provide an aluminum die-casting alloy which has a new alloy composition capable of providing strength higher than that of the conventional A354 used e.g. for a cast compressor impeller and has excellent seizure resistance and also to provide a cast compressor impeller made of the alloy and its manufacturing method. SOLUTION: This alloy is an aluminum die-casting alloy which has a composition consisting of, by mass, 3.2 to 5.0% Cu, 0.8 to 3.0% Ni, 1.0 to 3.0% Mg, 0.05 to 0.20% Ti,≤1.0% Si, further >0.3 to 1.5% Fe and the balance Al with inevitable impurities and has excellent seizure resistance. The cast compressor impeller can be obtained by die-casting the alloy into an impeller shape comprising: a hub spindle part; a hub disc part extending from the hub spindle part in a radial direction and having a hub face and a disc face; and a plurality of impeller parts provided to the hub face. COPYRIGHT: (C)2009,JPO&INPIT |
