Aluminum alloy brazing sheet

Patent metadata

Field	Value
Publication number	US-2018141166-A1
Application number	US-201815876859-A
Country	US
Kind code	A1
Filing date	Jan 22, 2018
Priority date	May 7, 2012
Publication date	May 24, 2018
Grant date	—

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.

First claim

What is claimed is:

1 . An aluminum alloy brazing sheet for brazing aluminum in an inert gas atmosphere without using flux, the brazing sheet comprising 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, with the balance being aluminum and unavoidable impurities 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.

2 . The aluminum alloy brazing sheet according to claim 1 , wherein the aluminum alloy that forms the core material includes 0.2 to 1.3 mass % of Mg, and further includes one, or two or more of 0.05 to 1.8 mass % of Mn, 1.0 mass % or less of Si, 1.0 mass % or less of Fe, 0.9 mass % or less of Cu, 6.5 mass % or less of Zn, 0.2 mass % or less of Ti, and 0.5 mass % or less of Zr, with the balance being aluminum and unavoidable impurities.

3 . The aluminum alloy brazing sheet according to claim 1 , wherein the filler metal further includes one or more of 0.004 to 0.2 mass % of Bi, 0.05 to 0.4 mass % of Mg, 0.002 to 0.05 mass % of Sr and 0.003 to 0.07 mass % of Sb, 0.05 to 0.8 mass % of Fe, 0.05 to 0.2 mass % of Mn, and 0.01 to 0.15 mass % of Ti.

4 . An aluminum alloy brazing sheet for brazing aluminum in an inert gas atmosphere without using flux, the brazing sheet comprising a core material, a filler metal, and a sacrificial anode material, wherein one side of the core material is clad with the filler metal, and the other side of the core material is clad with a sacrificial anode material, the core material being formed of an aluminum alloy that includes 0.2 to 1.3 mass % of Mg, with the balance being aluminum and unavoidable impurities, 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, and the sacrificial anode material including 0.9 to 6 mass % of Zn, with the balance being aluminum and unavoidable impurities.

5 . The aluminum alloy brazing sheet according to claim 4 , wherein the aluminum alloy that forms the core material includes 0.2 to 1.3 mass % of Mg, and further includes one, or two or more of 0.05 to 1.8 mass % of Mn, 1.0 mass % or less of Si, 1.0 mass % or less of Fe, 0.9 mass % or less of Cu, 6.5 mass % or less of Zn, 0.2 mass % or less of Ti, and 0.5 mass % or less of Zr, with the balance being aluminum and unavoidable impurities.

6 . The aluminum alloy brazing sheet according to claim 4 , wherein the filler metal further includes one or more of 0.004 to 0.2 mass % of Bi, 0.05 to 0.4 mass % of Mg, 0.002 to 0.05 mass % of Sr and 0.003 to 0.07 mass % of Sb, 0.05 to 0.8 mass % of Fe, 0.05 to 0.2 mass % of Mn, and 0.01 to 0.15 mass % of Ti.

Assignees

• Uacj Corp

Inventors

• Itoh Yasunaga
• YAMAYOSHI Tomoki

Classifications

• C22C21/02

  with silicon as the next major constituent · CPC title

• Y10T428/12764

  Next to Al-base component · CPC title

• B23K35/0233

  Sheets or foils (B23K35/0244 takes precedence) · CPC title

• B23K35/286

  Al as the principal constituent · CPC title

• B23K2203/10

  Operations & Transport · mapped topic