Aluminum alloy impeller and manufacturing method of the same

An Al--Fe rapid solidification aluminum alloy, consisting essentially of the composition:

• Fe and Mn in a combined total amount of from about 5% to about 11% by weight, Fe being less than about 8%, Mn being less than about 8%, and the Mn/Fe ratio being greater than 0.2 and less than 4;
• V in an amount of from about 0.2% to about 4% by weight;
• Mo, Zr and Ti in a combined total amount of from about 0.2% to about 4% by weight;
• and
• aluminum and impurities.

An aluminum alloy impeller comprising an Al--Fe rapid solidification aluminum alloy, said alloy consisting essentially of the composition:

• Fe in an amount of from about 4% to about 12% by weight;
• V in an amount of from about 0.5 to about 5% by weight;
• Mo, Zr and Ti in a combined total amount of less than 5% by weight;
• and
• aluminum and impurities;
• wherein said impeller is made by a process comprising the steps of:
• spraying a molten metal comprising said composition with an inert gas by a spray forming process;
• rapidly solidifying said metal at a cooling speed of at least 10.sup.2 .degree. C./sec while simultaneously depositing said metal to form said rapid solidification aluminum alloy;
• extruding the rapid solidification aluminum alloy at a temperature of from about 200.degree. C. to 600.degree. C.;
• and
• forging the extruded alloy at said temperature.

An aluminum alloy impeller comprising of an Al--Fe rapid solidification aluminum alloy, said alloy consisting essentially of the composition:

• Fe and Mn in a combined total amount of from about 5% to about 11% by weight, Fe being less than about 8%, Mn being less than about 8%, and the Mn/Fe ratio being greater than 0.2 and less than 4;
• V in an amount of from about 0.2% to about 4% by weight;
• Mo, Zr and Ti in a combined total amount of from about 0.2% to about 4% by weight;
• and
• aluminum and impurities;
• wherein said impeller is made by a process comprising the steps of:
• spraying a molten metal comprising said composition with an inert gas by a spray forming process;
• rapidly solidifying said metal at a cooling speed of at least 10.sup.2 .degree. C./sec while simultaneously depositing said metal to form said rapid solidification aluminum alloy;
• extruding the alloy at a temperature of from about 200.degree. C. to 600.degree. C.;
• and
• forging the extruded alloy at said temperature.