Aluminum alloy brazing sheet

Patent metadata

Field	Value
Publication number	US-2018169797-A1
Application number	US-201715834220-A
Country	US
Kind code	A1
Filing date	Dec 7, 2017
Priority date	Dec 16, 2016
Publication date	Jun 21, 2018
Grant date	—

Abstract

The present invention relates to an aluminum alloy brazing sheet including a core material and a brazing filler material provided on one surface of the core material. The core material contains Mn: 0.5 mass % or more and 2.5 mass % or less and Mg: more than 0.5 mass % and 2.5 mass % or less, with the remainder being Al and unavoidable impurities. The brazing filler material contains Si: 3 mass % or more and 13 mass % or less and Bi: 0.01 mass % or more and 1.00 mass % or less, with the remainder being Al and unavoidable impurities.

First claim

1 . An aluminum alloy brazing sheet comprising a core material and a brazing filler material provided on one surface of the core material, wherein:
the core material comprises Mn: 0.5 mass % or more and 2.5 mass % or less and Mg: more than 0.5 mass % and 2.5 mass % or less, with the remainder being Al and unavoidable impurities; and the brazing filler material comprises Si: 3 mass % or more and 13 mass % or less and Bi: 0.01 mass % or more and 1.00 mass % or less, with the remainder being Al and unavoidable impurities.

2 . The aluminum alloy brazing sheet according to claim 1 , wherein the brazing filler material further comprises any one or more of the following (a) to (f):
(a) Mg: 0.10 mass % or less; (b) one or more kinds of Mn: 2.0 mass % or less, Ti: 0.3 mass % or less, Cr: 0.3 mass % or less, and Zr: 0.3 mass % or less; (c) Li: 0.3 mass % or less; (d) Zn: 5.0 mass % or less; (e) one or more kinds of Sr: 0.10 mass % or less, Na: 0.050 mass % or less and Sb: 0.5 mass % or less; and (f) a rare earth element: 1.0 mass % or less.

3 . The aluminum alloy brazing sheet according to claim 1 , wherein the core material further comprises any one or more of the following (a) to (e):
(a) Cu: 1.0 mass % or less; (b) Si: 1.0 mass % or less; (c) Fe: 1.5 mass % or less; (d) one or more kinds of Ti: 0.5 mass % or less, Cr: 0.5 mass % or less and Zr: 0.5 mass % or less; and (e) Li: 0.3 mass % or less.

4 . The aluminum alloy brazing sheet according to claim 2 , wherein the core material further comprises any one or more of the following (a) to (e):
(a) Cu: 1.0 mass % or less; (b) Si: 1.0 mass % or less; (c) Fe: 1.5 mass % or less; (d) one or more kinds of Ti: 0.5 mass % or less, Cr: 0.5 mass % or less and Zr: 0.5 mass % or less; and (e) Li: 0.3 mass % or less.

Assignees

• Kobe Steel Ltd

Inventors

• Izumi Takahiro
• Tsuruno Akihiro
• Kimura Shimpei
• Kobayashi Nobuhiro

Classifications

• C22C21/02

  with silicon as the next major constituent · CPC title

• B32B15/016

  all layers being formed of aluminium or aluminium alloys · CPC title

• B23K35/0238

  layered · CPC title

• B23K35/288 Primary

  with Sn or Zn · CPC title