公开(公告)号：US20180200842A1

公开(公告)日：2018-07-19

申请号：US15744205

申请日：2016-06-29

Applicant: UACJ CORPORATION

Inventor： Yasunaga ITOH ,  Tomoki YAMAYOSHI ,  Yutaka YANAGAWA

IPC: B23K35/28 ,  B23K35/02 ,  C22C21/02 ,  B32B15/01

Abstract: An aluminum alloy brazing sheet used for brazing aluminum, without using a flux, in an inert gas atmosphere or vacuum is formed by arranging a brazing material on one side or both sides of a core material made of pure aluminum or aluminum alloy, the brazing material including 6% to 13% by mass of Si and the balance being Al and inevitable impurities, and performing cladding with an intermediate material interposed between the core material and the brazing material, the intermediate material including 0.01% to 1.5% by mass of Bi, 1.5% to 13% by mass of Si, and the balance being Al and inevitable impurities, the intermediate material having a thickness of 2% to 35% of a thickness of the brazing material, wherein one or both of the intermediate material and the core material includes 0.4% to 6% by mass of Mg.

公开(公告)号：US20180133845A1

公开(公告)日：2018-05-17

申请号：US15572945

申请日：2016-05-18

Applicant: UACJ Corporation

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

IPC: B23K35/28 ,  B23P15/26 ,  F28F9/16 ,  B23K1/00 ,  B23K35/38 ,  B23K1/19 ,  C22C21/02 ,  C22C21/08

CPC classification number: B23K35/286 ,  B23K1/00 ,  B23K1/0012 ,  B23K1/19 ,  B23K31/02 ,  B23K35/22 ,  B23K35/28 ,  B23K35/383 ,  B23K2101/14 ,  B23K2103/10 ,  B23P15/26 ,  C22C21/00 ,  C22C21/02 ,  C22C21/08 ,  F28F9/16 ,  F28F2275/04

Abstract: A brazing method includes shaping a clad plate to form a hollow structure. The clad plate has at least one layer containing an element that breaks down an oxide film when heated. 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 filler-material layer. The exterior surface of the tube that opposes the through hole of the hollow structure is composed of aluminum or an aluminum alloy that does not function as a filler when brazed. The assembled aluminum structure is brazed by heating it and then cooling it in an inert-gas atmosphere such that the filler-material layer of the clad plate flows and forms a fillet joining the hollow structure to the tube along the through hole.

公开(公告)号：US20170320170A1

公开(公告)日：2017-11-09

申请号：US15533869

申请日：2015-11-13

Applicant: UACJ Corporation

Inventor： Yutaka YANAGAWA ,  Yasunaga ITOH ,  Tomoki YAMAYOSHI

IPC: B23K35/28 ,  C22C21/00 ,  B23K1/20 ,  B23K1/00 ,  B23K1/19 ,  C22C21/02 ,  B23K35/02

CPC classification number: B23K35/288 ,  B23K1/00 ,  B23K1/0012 ,  B23K1/19 ,  B23K1/20 ,  B23K1/203 ,  B23K1/206 ,  B23K31/02 ,  B23K35/0238 ,  B23K35/22 ,  B23K35/28 ,  B23K35/286 ,  B23K2101/14 ,  C22C21/00 ,  C22C21/02 ,  F28F1/02 ,  F28F3/025 ,  F28F21/084 ,  F28F2275/045

Abstract: A hollow aluminum structure that will be brazed includes at least one brazing sheet having a filler metal layer clad onto a core layer. The core layer is composed of aluminum or an aluminum alloy containing less than 0.2 mass % Mg. The filler metal layer is composed of an aluminum alloy that contains Si: 4.0-13.0 mass % and Bi: 0.01-0.3 mass %, and further contains Li: 0.004-0.08 mass % and/or Be: 0.006-0.12 mass %, the filler metal layer containing less than 0.1 mass % Mg. The hollow aluminum structure is assembled such that the filler metal layer is present at locations that will form both an interior-facing brazed joint and an exterior-facing brazed joint. Then, flux is applied onto the filler metal layer at the location that will form the exterior brazed joint, and the hollow aluminum structure heated in an inert gas atmosphere to form the interior brazed joint and the exterior brazed joint.