Uacj Corporation

Denso Corporation

Takeyoshi Dokou

Shinichi Nakamura

Tomoki Yamayoshi

Naoki Sugimoto

Taketoshi Toyama

Shogo Yamada

Nobuhiro Honma

Takahiro Shinoda

Yoshihiko Sonoda

A brazing sheet () includes a core material () composed of an Al alloy that contains 0.20-3.0 mass % of Mg; and a filler material () layered on the core material and composed of an Al alloy that contains Mg, 6.0-13.0 mass % of Si, and more than 0.050 mass % and 1.0 mass % or less of Bi. The Mg concentration of the filler material becomes continuously lower in a direction from a boundary () with the core material to an outermost surface (). The Mg concentration of the filler material is 0.150 mass % or less at a first depth from the outermost surface that is &#x215b; of a thickness (t) of the filler material and is 5-90% of the amount of Mg in the core material at a second depth from the outermost surface that is &#x215e; of the thickness of the filler material.

Brazing sheet and manufacturing method thereof

A brazing sheet () includes a core material () composed of an Al alloy containing 0.40-2.50 mass % Mg; and a filler material () composed of an Al alloy containing Mg, 6.0-13.0 mass % Si, and 0.010-0.050 mass % Bi. The filler material is layered on a side of the core material and is exposed at an outermost surface (). The Mg concentration in the filler material continuously decreases in a direction from a boundary () with the core material toward the outermost surface. The Mg concentration (c) is 0.080 mass % or less at a depth (position P) from the outermost surface that is &#x215b; of the thickness tof the filler material (). The Mg concentration (c) is 15-45% of the amount of Mg in the core material at a depth (position P) from the outermost surface that is &#x215e; of the thickness tof the filler material.

Aluminum-alloy brazing sheet and manufacturing method thereof

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Aichi, Japan

Takeyoshi Dokou