COMPRESSOR IMPELLER CAST FROM AL ALLOY AND METHOD FOR PRODUCING SAME

• Main Authors: TAKAHASHI, Koichi, ISHIKAWA, Nobuhito, KUBO, Takashi, USHIYAMA, Toshio
• Format: Patent
• Language: English; French; German
• Published: 15.03.2017
• Subjects: ALLOYS; BLASTING; CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS; CHEMISTRY; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; FERROUS OR NON-FERROUS ALLOYS; FOUNDRY MOULDING; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; MECHANICAL ENGINEERING; METALLURGY; NON-POSITIVE DISPLACEMENT PUMPS; PERFORMING OPERATIONS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; POWDER METALLURGY; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WEAPONS

The present invention provides: a compressor impeller that cast from an aluminum alloy, has superior production characteristics, and exhibits stable high-temperature strength when used at temperatures around 200°C; and a method for producing same. The compressor impeller that is cast from an Al alloy is provided with a boss section, a plurality of vane sections and a disc section; the boss section, the plurality of vane sections and the disc section excluding the end section comprise an Al alloy comprising a predetermined metal composition; and at the end section of the disc section, there are at least 10,000/mm 2 of intermetallic compounds having a circle-equivalent diameter of 1-6 µm, and there are no greater than 500/mm 2 of intermetallic compounds having a circle-equivalent diameter exceeding 6µm.