BRAZING SHEET FOR HEAT EXCHANGER, AND METHOD FOR MANUFACTURING SAID SHEET

An aluminum alloy brazing sheet for heat exchangers, the brazing sheet having, as a core alloy, an Al alloy containing Mn 0.6 to 2.0 mass%, Fe 0.05 to 0.5 mass%, Si 0.4 to 0.9 mass%, and Zn 0.02 to 4.0 mass%, with the balance being Al and unavoidable impurities; and as a skin alloy disposed on each...

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Bibliographische Detailangaben
Hauptverfasser:	KANNO, Yoshimasa, TERAYAMA, Kazuko, TANAKA, Satoshi
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ALLOYS BLASTING CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS CHEMISTRY CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION FERROUS OR NON-FERROUS ALLOYS HEAT EXCHANGE IN GENERAL HEATING LIGHTING MACHINE TOOLS MECHANICAL ENGINEERING METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY PERFORMING OPERATIONS SOLDERING OR UNSOLDERING TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS WEAPONS WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	An aluminum alloy brazing sheet for heat exchangers, the brazing sheet having, as a core alloy, an Al alloy containing Mn 0.6 to 2.0 mass%, Fe 0.05 to 0.5 mass%, Si 0.4 to 0.9 mass%, and Zn 0.02 to 4.0 mass%, with the balance being Al and unavoidable impurities; and as a skin alloy disposed on each surface of the core alloy, an Al alloy containing Si 6.0 to 13.0 mass%, Fe 0.05 to 0.80 mass%, and Cu 0.05 to 0.45 mass%, with the balance being Al and unavoidable impurities, wherein a ratio A/B of a number density A (particles/mm 2 ) of Al-Mn-Fe-based or Al-Mn-Si-based precipitates having a particle size of 0.1 µm or more but less than 3.0 µm, and a number density B (particles/mm 2 ) of precipitates having a particle size of 3.0 µm or more in the core alloy, satisfies a relationship: 50 ¤ A/B ¤ 500, and wherein an average grain size of the core alloy in a longitudinal cross-section of a fin after braze-heating is 100 µm or more; and a method of producing the same.