Mitsubishi Heavy Industries Limited

Kouichiro Imakiire

Keiichi Shiraishi

Nozomu Kawasetsu

Masanori Kimura

Kazuhisa Shibue

Naoki Tokizane

Yoshimasa Okubo

Masayuki Hayakawa

Masatomo Shinohara

There is disclosed a high heat resistant aluminum alloy impeller, which is suitably used as an impeller, especially for a centrifugal compressor, and for the rotor and the blade of a turbo molecular pump or the scroll of a scroll compressor. Also, a method for manufacturing this aluminum alloy impeller is disclosed. The impeller is composed of an Al--Fe rapid solidification aluminum alloy, which is produced by a spray forming process for spraying a molten metal with inert gas and rapidly solidifying the metal at a cooling speed of 10.sup.2 .degree. C./sec. or higher while simultaneously deposing the metal. The rapid solidification aluminum alloy is subjected to hot extrusion processing within a temperature range of 200.degree. C. to 600.degree. C. and further subjected to hot forging.

Aluminum alloy impeller and manufacturing method of the same

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Nagasaki-ken, Japan

Kouichiro Imakiire