Method for manufacturing an aluminum alloy fin material for brazing

• Main Authors: DOKO TAKEYOSHI, KAWAHARA AKIRA
• Format: Patent
• Language: English
• Published: 23.01.2003
• Edition: 7
• 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; DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION; FERROUS OR NON-FERROUS ALLOYS; HEAT EXCHANGE IN GENERAL; HEATING; LIGHTING; MECHANICAL ENGINEERING; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; METALLURGY; PERFORMING OPERATIONS; POWDER METALLURGY; PUNCHING METAL; ROLLING OF METAL; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WEAPONS

A method for manufacturing an aluminum alloy fin material for brazing, which has the steps of: forming an ingot sheet, by casting a molten liquid of an aluminum alloy by a twin-roll-type continuous cast-rolling method; and cold-rolling the ingot sheet, to prepare a fin material, with the aluminum alloy containing each prescribed amounts of Mn, Fe, and Si, with the balance being Al and inevitable impurities, wherein the twin-roll-type continuous cast-rolling is applied under each prescribed conditions of a molten liquid temperature, a roll press load, a casting speed, and a thickness of the ingot sheet, and wherein two times or more of intermediate annealing are applied midway in the cold-rolling process, with the intermediate annealing including final intermediate annealing with a batch-type heating furnace in a prescribed temperature range, thereby adjusting the prescribed rolling ratio in the cold-rolling, after the final intermediate annealing.