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：US20170282271A1

公开(公告)日：2017-10-05

申请号：US15509303

申请日：2015-07-17

Applicant: UACJ Corporation

Inventor： Yasunaga ITOH ,  Yutaka YANAGAWA ,  Shoichi SAKODA

IPC: B23K1/008 ,  F27D13/00 ,  F27D7/06 ,  B23K1/19 ,  B23K31/02

Abstract: A brazing furnace (1) includes a preheating chamber (2) and a brazing chamber (3). The preheating chamber (2) includes: a vacuum pump (21) for reducing the pressure inside the preheating chamber (2) while a material to be processed (100) is housed therein; a preheating apparatus (22), which preheats the material to be processed (100) in a reduced-pressure atmosphere; and a gas introducing apparatus (23), which introduces inert gas into the preheating chamber (2) to restore the pressure inside the preheating chamber (2) after the preheating. The brazing chamber (3) includes: a gas-replacing apparatus (31), which introduces inert gas into the brazing chamber (3); and a main heating apparatus (32), which heats the material to be processed (100) to a brazing temperature while it is housed in the brazing chamber (3).

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.