| abstract |
In an aluminum alloy brazing sheet using a 6XXX series alloy as a core material, excellent brazing is realized by suppressing brazing diffusion during brazing and performing appropriate aging treatment after brazing. An aluminum alloy brazing sheet having the above and a method for producing the same. One or both surfaces of a core material are clad with an Al—Si brazing material, and the core material is composed of Si: 0.2 to 1.0% (mass%, hereinafter the same), Fe: 0.03 to 0. 4%, Mg: 0.1 to 0.5%, Cu: 0.05 to 1.0%, and X value determined by Si content Sic and Cu content Cuc: X = 6 × Sic + 2. 5 × Cuc is a composition satisfying the relationship of 2.0 ≦ X ≦ 6.0, and Mn: 0.05 to 0.3%, Zr: 0.05 to 0.3%, Cr: 0.00. It is an aluminum alloy containing at least one of 05 to 0.3% and the balance being Al and inevitable impurities. The metal structure after the final cold rolling is 0.05 μm or more and 1 μm or less in the observation of the cross-sectional structure aluminum alloy brake and the intermetallic compound to contain 1 [mu] m 2 per 5 or more 50 or less Constitute the Ngushito. [Selection figure] None |