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.

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：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 %.