MANUFACTURE OF SEMIFINISHED PRODUCT AND FINISHED PRODUCT OF HEAT TREATMENT-TYPE ALUMINUM ALLOY EXCELLENT IN STRENGTH

PURPOSE:To manufacture a heat treatment-type Al-alloy product excellent in strength by applying solution heat treatment to a semifinished product of Al alloy and then subjecting the above to ageing treatment in which ageing applying specific stress is combined with free ageing. CONSTITUTION:The pres...

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Hauptverfasser:	ETO TAKEHIKO, USUI HIDEYOSHI
Format:	Patent
Sprache:	eng
Schlagworte:	CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS METALLURGY TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	PURPOSE:To manufacture a heat treatment-type Al-alloy product excellent in strength by applying solution heat treatment to a semifinished product of Al alloy and then subjecting the above to ageing treatment in which ageing applying specific stress is combined with free ageing. CONSTITUTION:The prescribed solution heat treatment is applied to a semifinished product of heat treatment-type Al alloy, e.g., at 495 deg.C for 30min. subsequently, the above semifinished product is subjected to ageing treatment in which stress ageing applying a stress of 30-95% of the elastic limit of the material is combined with tree ageing performing ageing without the application of stress. Further, straightening is applied after solution heat treatment. By this method, the semifinished product and finished product of heat treatment-type Al alloy excellent in strength can be manufactured.