ALUMINUM ALLOY CASTING AND ITS MANUFACTURING METHOD

PROBLEM TO BE SOLVED: To provide an aluminum alloy casting having excellent tensile strength and fatigue strength and suitably used e.g. as a cylinder head for internal-combustion engines and its manufacturing method and further to provide a cylinder head for internal-combustion engines made of the...

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Hauptverfasser:	SASAKI SOJI, AKIYAMA KOICHI
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES 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 CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES FERROUS OR NON-FERROUS ALLOYS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MECHANICAL ENGINEERING METALLURGY PERFORMING OPERATIONS POWDER METALLURGY TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide an aluminum alloy casting having excellent tensile strength and fatigue strength and suitably used e.g. as a cylinder head for internal-combustion engines and its manufacturing method and further to provide a cylinder head for internal-combustion engines made of the aluminum alloy casting and a cylinder head for internal-combustion engines obtained using the manufacturing method. SOLUTION: In the aluminum alloy casting which has a composition consisting of, by mass, 4.0 to 10.0%, preferably 4.0 to 7.0%, Si, 2.0 to 4.5% Cu, ≤0.5%, preferably 0.25 to 0.45%, Mg, 35 to 200 ppm, preferably >50 to 200 ppm Sr and the balance Al with inevitable impurities, Fe content is reduced to ≤0.25% and the amount of porosity is set to ≤0.3% by area ratio. COPYRIGHT: (C)2007,JPO&INPIT