EXTRUDED PERFORATED ALUMINUM ALLOY TUBE FOR HEAT EXCHANGERS, AND METHOD FOR PRODUCING SAME

An aluminum alloy extruded multi-hole tube for a heat exchanger is formed of an aluminum alloy comprising Mn of 0.60 to 1.80 mass % and Si of 0.20 to 0.70 mass %, with the balance being Al and inevitable impurities. The aluminum alloy has a ratio (Mn/Si) of the Mn content to the Si content being 2.6...

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Bibliographische Detailangaben
Hauptverfasser:	SUZUKI, Taichi, KUMAGAI, Hidetoshi, TOMORI, Ryo
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ALLOYS AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL BLASTING CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS CHEMISTRY DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION FERROUS OR NON-FERROUS ALLOYS HEAT EXCHANGE IN GENERAL HEATING LIGHTING MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING MECHANICAL ENGINEERING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METALLURGY PERFORMING OPERATIONS PUNCHING METAL TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS WEAPONS
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Beschreibung
Zusammenfassung:	An aluminum alloy extruded multi-hole tube for a heat exchanger is formed of an aluminum alloy comprising Mn of 0.60 to 1.80 mass % and Si of 0.20 to 0.70 mass %, with the balance being Al and inevitable impurities. The aluminum alloy has a ratio (Mn/Si) of the Mn content to the Si content being 2.6 to 4.0. Strength change (tensile strength (A) of the aluminum alloy after heating test - tensile strength (B) of the aluminum alloy before heating test) thereof in a heating test at 600°C±10°C for 3 minutes is -5 MPa or more. The present invention can provide an aluminum alloy extruded multi-hole tube for a heat exchanger having excellent extrudability and high strength after brazing, and a method for manufacturing the same.