公开(公告)号：US11780034B2

公开(公告)日：2023-10-10

申请号：US17279873

申请日：2019-09-27

Applicant: UACJ Corporation ,  DENSO CORPORATION

Inventor： Shinichi Nakamura ,  Tomoki Yamayoshi ,  Takeyoshi Dokou ,  Takahiro Shinoda ,  Shogo Yamada ,  Yoshihiko Sonoda ,  Naoki Sugimoto ,  Nobuhiro Honma ,  Taketoshi Toyama

IPC: B23K35/28 ,  B23K20/04 ,  B23K35/02 ,  C22C21/02 ,  C22C21/08 ,  C23F1/20 ,  F28F3/02 ,  B23K103/10 ,  B23K101/14

CPC classification number: B23K35/286 ,  B23K20/04 ,  B23K35/0238 ,  C22C21/02 ,  C22C21/08 ,  C23F1/20 ,  F28F3/025 ,  B23K2101/14 ,  B23K2103/10 ,  F28F2275/04

Abstract: A brazing sheet (1) includes a core material (11) composed of an Al alloy that contains 0.20-3.0 mass % of Mg; and a filler material (12) 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 (122) with the core material to an outermost surface (121). The Mg concentration of the filler material is 0.150 mass % or less at a first depth from the outermost surface that is ⅛ of a thickness (tf) 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 ⅞ of the thickness of the filler material.

公开(公告)号：US11772205B2

公开(公告)日：2023-10-03

申请号：US17794809

申请日：2020-03-30

Applicant: UACJ Corporation

Inventor： Shinichi Nakamura ,  Tomoki Yamayoshi ,  Takeyoshi Dokou

IPC: B23K35/28 ,  B23K35/02 ,  C21D8/02 ,  C22C21/02 ,  C22C21/06 ,  B23K103/10

CPC classification number: B23K35/286 ,  B23K35/0238 ,  C21D8/0226 ,  C22C21/02 ,  C22C21/06 ,  B23K2103/10

Abstract: A brazing sheet (1) includes a core material (11) composed of an Al alloy containing 0.40-2.50 mass % Mg; and a filler material (12) 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 (121). The Mg concentration in the filler material continuously decreases in a direction from a boundary (122) with the core material toward the outermost surface. The Mg concentration (c1/8) is 0.080 mass % or less at a depth (position P1/8) from the outermost surface that is ⅛ of the thickness tf of the filler material (12). The Mg concentration (c7/8) is 15-45% of the amount of Mg in the core material at a depth (position P7/8) from the outermost surface that is ⅞ of the thickness tf of the filler material.