公开(公告)号：US20250083205A1

公开(公告)日：2025-03-13

申请号：US18024987

申请日：2021-09-22

Applicant: UACJ Corporation

Inventor： Yutaka YANAGAWA ,  Taichi SUZUKI ,  Tomoki YAMAYOSHI ,  Tatsuya IDE

IPC: B21B1/22 ,  B23K35/02 ,  B23K35/28

Abstract: A method of manufacturing a brazing sheet includes layering at least a core-material slab composed of an aluminum material and a filler-material slab composed of an Al—Si series alloy to prepare a clad slab. At least one aluminum slab in the clad slab, which is disposed in a range from the core-material slab to the filler-material slab inclusive, contains a metal element that oxidizes more readily than Al. The clad slab is hot rolled to prepare a clad sheet that includes a core material composed of the core-material slab and a filler material composed of the filler-material slab. Then, one or more passes of cold rolling is performed on the clad sheet. Between passes of cold rolling or after completion of the cold rolling, at least one surface of the clad sheet is etched using an alkaline etching solution having a sodium hydroxide concentration of 0.05-1.0 mass %.

公开(公告)号：US20180141166A1

公开(公告)日：2018-05-24

申请号：US15876859

申请日：2018-01-22

Applicant: UACJ Corporation

Inventor： Yasunaga ITOH ,  Tomoki YAMAYOSHI

IPC: B23K35/02 ,  F28F21/08 ,  B23K1/00 ,  C22C21/10 ,  C22C21/06 ,  C22C21/04 ,  C22C21/02 ,  C22C21/00 ,  B32B15/01 ,  B23K35/28 ,  B23K1/012 ,  B23K1/008 ,  B23K103/10

CPC classification number: B23K35/0238 ,  B23K1/0012 ,  B23K1/008 ,  B23K1/012 ,  B23K35/0233 ,  B23K35/286 ,  B23K35/288 ,  B23K2101/14 ,  B23K2103/10 ,  B32B15/01 ,  B32B15/016 ,  C22C21/00 ,  C22C21/02 ,  C22C21/04 ,  C22C21/06 ,  C22C21/10 ,  F28F21/084 ,  F28F21/089 ,  Y10T428/12764

Abstract: An aluminum alloy brazing sheet makes it possible to inexpensively braze aluminum in a nitrogen gas furnace without using flux and a toxic element. The aluminum alloy brazing sheet is used for brazing aluminum in an inert gas atmosphere without using flux, and includes a core material and a filler metal, one side or each side of the core material being clad with the filler metal, the core material being formed of an aluminum alloy that includes 0.2 to 1.3 mass % of Mg, and the filler metal including 6 to 13 mass % of Si and 0.004 to 0.1 mass % of Li, with the balance being aluminum and unavoidable impurities.

公开(公告)号：US20230158613A1

公开(公告)日：2023-05-25

申请号：US17905423

申请日：2021-03-22

Applicant: UACJ Corporation

Inventor： Yutaka YANAGAWA ,  Tomoki YAMAYOSHI ,  Tatsuya IDE ,  Taichi SUZUKI

IPC: B23K35/28 ,  B23K35/02 ,  C22C21/02 ,  C22F1/043 ,  C22F1/05 ,  B32B15/01 ,  C23F1/20

CPC classification number: B23K35/286 ,  B23K35/0238 ,  C22C21/02 ,  C22F1/043 ,  C22F1/05 ,  B32B15/016 ,  C23F1/20 ,  B23K2103/10

Abstract: A brazing-sheet manufacturing method includes superposing a core-material slab on or adjacent to at least one surface of a filler-material slab to form a clad slab, the core-material slab being composed of an aluminum material and the filler-material slab being composed of an Al—Si—Mg series alloy. Then, the clad slab is hot rolled to form a clad sheet having a core material layer composed of the aluminum material of the core-material slab and a filler material layer composed of the Al—Si—Mg series alloy of the filler-material slab. Then, the clad sheet is subjected to one or more passes of cold rolling. Either between cold-rolling passes or after the completion of the cold rolling, a surface of the clad sheet is etched using a liquid etchant that includes one or more inorganic acids. The liquid etchant does not contain fluorine atoms.

公开(公告)号：US20230082095A1

公开(公告)日：2023-03-16

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 ,  C22C21/02 ,  C22C21/06 ,  C21D8/02

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.

公开(公告)号：US20170151638A1

公开(公告)日：2017-06-01

申请号：US15428775

申请日：2017-02-09

Applicant: UACJ CORPORATION

Inventor： Yasunaga ITOH ,  Tomoki YAMAYOSHI

IPC: B23K35/28 ,  B23K35/02 ,  B23K1/00 ,  F28F21/08 ,  B23K35/38 ,  C22C21/02 ,  C22C21/06 ,  C22C21/00 ,  B32B15/01 ,  B23K1/20

CPC classification number: B23K35/286 ,  B23K1/00 ,  B23K1/0012 ,  B23K1/20 ,  B23K1/206 ,  B23K35/00 ,  B23K35/0238 ,  B23K35/38 ,  B23K2101/14 ,  B32B15/016 ,  C22C21/00 ,  C22C21/02 ,  C22C21/06 ,  F28F21/084 ,  F28F21/089 ,  Y10T428/12764

Abstract: An aluminum alloy brazing sheet achieves a stable brazability equal to by brazing using a flux, even if an etching treatment is not performed on the brazing site. The aluminum alloy brazing sheet is used to braze aluminum in an inert gas atmosphere without using a flux and includes a core material and a filler metal, one side or each side of the core material being clad with the filler metal, the core material being formed of an aluminum alloy that includes 0.2 to 1.3 mass % of Mg, the filler metal including 6 to 13 mass % of Si and 0.004 to 0.1 mass % of Li, with the balance being aluminum and unavoidable impurities, a surface oxide film having been removed from the brazing sheet, and an oil solution that decomposes when heated at 380° C. or less in an inert gas having been applied to the brazing sheet.

公开(公告)号：US20210394311A1

公开(公告)日：2021-12-23

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 ,  B23K35/02 ,  C22C21/08 ,  C22C21/02 ,  C23F1/20 ,  B23K20/04 ,  F28F3/02

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：US20200061758A1

公开(公告)日：2020-02-27

申请号：US16463187

申请日：2017-07-24

Applicant: UACJ Corporation

Inventor： Yasunaga ITOH ,  Tomoki YAMAYOSHI

IPC: B23K35/28

Abstract: A brazing sheet brazing suitable for brazing performed in an inert gas atmosphere or in a vacuum without using a flux includes a filler layered on a core. The core is composed of an aluminum alloy containing 0.20-1.3 mass % Mg. The filler is composed of an aluminum alloy containing Si: 6.0-13.0 mass % Si, 0.0040-0.070 mass % Bi, and 0.051-0.10 mass % Mg.

公开(公告)号：US20180214964A1

公开(公告)日：2018-08-02

申请号：US15747609

申请日：2016-05-18

Applicant: UACJ Corporation

Inventor： Yasunaga ITOH ,  Yutaka YANAGAWA ,  Tomoki YAMAYOSHI ,  Junji NINOMIYA ,  Tsubasa YANAGIMOTO

IPC: B23K1/19 ,  B23K1/20 ,  B23K35/28

CPC classification number: B23K1/19 ,  B23K1/0012 ,  B23K1/20 ,  B23K31/02 ,  B23K35/0222 ,  B23K35/0238 ,  B23K35/286 ,  B23K2101/14 ,  B23K2103/10 ,  B32B15/016 ,  C22C21/02

Abstract: A brazing method includes shaping a clad sheet to form a hollow structure. A tube is then partially inserted into a through hole in the hollow structure, thereby forming an assembled aluminum structure. The exterior surface of the hollow structure adjacent the through hole is composed of an Al—Si alloy that serves as a first filler material. The interior surface of the hollow structure adjacent the through hole is composed of an Al—Si alloy containing at least one of Cu and Zn and having a solidus temperature of 570° C. or less that serves as a second filler material. The assembled aluminum structure is brazed by heating it in an inert-gas atmosphere such that fillets joining the hollow structure to the tube along the through hole are formed first on the interior surface of the hollow structure and then on the exterior surface of the hollow structure.

公开(公告)号：US20170151637A1

公开(公告)日：2017-06-01

申请号：US15325530

申请日：2015-07-29

Applicant: UACJ Corporation

Inventor： Junichi ICHIKAWA ,  Tomoki YAMAYOSHI ,  Yasunaga ITOH ,  Yutaka YANAGAWA

IPC: B23K35/28 ,  C22C21/06 ,  B23K35/02 ,  C22C21/02 ,  B23K1/00 ,  B23K1/008

Abstract: A brazing sheet for brazing in an inert-gas atmosphere without using a flux has a core and a filler material clad to one side or both sides of the core. The core has a chemical composition that contains Mg: 0.35-0.8% (mass %; likewise hereinbelow), the remainder being composed of Al and unavoidable impurities. The filler material has a chemical composition that contains Si: 6-13% and Bi: 0.001-0.05% and Mg: limited less than 0.05%, the remainder being composed of Al and unavoidable impurities.

公开(公告)号：US20210213568A1

公开(公告)日：2021-07-15

申请号：US17268283

申请日：2019-09-05

Applicant: UACJ Corporation

Inventor： Yutaka YANAGAWA ,  Tatsuya IDE ,  Taichi SUZUKI ,  Tomoki YAMAYOSHI

IPC: B23K35/02 ,  B32B15/01 ,  B23K35/28 ,  B23K20/02 ,  C23F1/20 ,  C22C21/02

Abstract: In a brazing sheet manufacturing method, a cladding slab is prepared by overlaying at least a core-material slab composed of an aluminum material and a filler-material slab composed of an Al—Si series alloy, in which a metal element that oxidizes more readily than Al is included in at least one of the slabs. A clad sheet is prepared by hot rolling this cladding slab, which then has at least a core material layer composed of the core-material slab and a filler material layer composed of the filler-material slab and disposed on at least one side of the core material. Then, a surface of the clad sheet is etched using a liquid etchant that contains an acid. Subsequently, the clad sheet is cold rolled to a desired thickness. In flux-free brazing, such a brazing sheet is capable of curtailing degradation in brazeability caused by fluctuations in dew point and oxygen concentration.