Aluminum alloy brazing sheet and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-2021394312-A1
Application number	US-201917287267-A
Country	US
Kind code	A1
Filing date	Oct 25, 2019
Priority date	Oct 26, 2018
Publication date	Dec 23, 2021
Grant date	—

Abstract

An aluminum alloy brazing sheet used for brazing of an aluminum material in an inert gas atmosphere or in vacuum is formed of a two-layer material in which a brazing material and a core material are stacked. The core material is formed of an aluminum alloy and has a grain size of 20 to 300 μm, and the aluminum alloy contains Mn of 0.50 to 2.00 mass %, Mg of 0.40 to 2.00 mass %. Si of 1.50 mass % or less, Fe of 1.00 mass % or less, and Ti of 0.10 to 0.30 mass %, with the balance being aluminum and inevitable impurities. The brazing material is formed of an aluminum alloy containing Si of 4.00 to 13.00 mass % with the balance being aluminum and inevitable impurities. In a drop-type fluidity test, a ratio α (α=Ka/Kb) of a fluid coefficient Ka is 0.50 or more.

First claim

1 - 22 . (canceled)

23 . An aluminum alloy brazing sheet used for brazing of an aluminum material in an inert gas atmosphere or in vacuum and formed of a two-layer material in Which a brazing material and a core material are stacked in this order,
the core material being formed of an aluminum alloy and having a grain size of 20 to 300 μm, the aluminum alloy comprising Mn of 0.50 to 2.00 mass %, Mg of 0.40 to 2.00 mass Si of 1.50 mass % or less, Fe of 1.00 mass % or less, and Ti of 0.10 to 0.30 mass %, and optionally one or two or more of Cu of 1.20 mass % or less, Zr of 0.30 mass % or less, and Cr of 0.30 mass % or less, with the balance being aluminum and inevitable impurities, the brazing material being formed of an aluminum alloy comprising Si of 4.00 to 13.00 mass %, and optionally one or two or more of Bi of 1.00 mass or less, Na of 0.050 mass or less, Sr of 0.050 mass % or less, Sb of 0.050 mass or less, Mg of 2.00 mass % or less, Zn of 8.00 mass % or less, Cu of 4.00 mass % or less, In of 0.100 mass % or less, Sit of 0.100 mass % or less, and Fe of 1.00 mass % or less, with the balance being aluminum and inevitable impurities, and in a drop-type fluidity test, a ratio α (α=K a /K b ) of a fluid coefficient K a after a 5% strain is applied to a fluid coefficient K b before the strain is applied being 0.50 or more.

24 . An aluminum alloy brazing sheet used for brazing of an aluminum material in an inert gas atmosphere or in vacuum and formed of a three-layer material in which a brazing material, a core material, and a brazing material are stacked in this order,
the core material being formed of an aluminum alloy and having a grain size of 20 to 300 μm, the aluminum alloy comprising Mn of 0.50 to 2.00 mass %, Mg of 0.40 to 2.00 mass %, Si of 1.50 mass % or less, Fe of 1.00 mass % or less, and Ti of 0.10 to 0.30 mass %, and optionally one or two or more of Cu of 1.20 mass % or less, Zr of 0.30 mass % or less, and Cr of 0.30 mass % or less, with the balance being aluminum and inevitable impurities, each of the brazing materials being formed of an aluminum alloy comprising Si of 4.00 to 13.00 mass % and optionally one or two or more of Bi of 1.00 mass % or less, Na of 0.050 mass % or less, Sr of 0.050 mass % or less, Sb of 0.050 mass % or less, Mg of 2.00 mass % or less, Zn of 8.00 mass % or less, Cu of 4.00 mass % or less, In of 0.100 mass % or less, Sn of 0.100 mass % or less, and Fe of 1.00 mass % or less, with the balance being aluminum and inevitable impurities, and in a drop-type fluidity test, a ratio α (α=K a /K b ) of a fluid coefficient K a after a 5% strain is applied to a fluid coefficient K b before the strain is applied being 0.50 or more.

25 . An aluminum alloy brazing sheet used for brazing of an aluminum Material in an inert gas atmosphere or in vacuum and formed of a three-layer material in which a brazing material, a core material, and a sacrificial anode material are stacked in this order,
the core material being formed of an aluminum alloy and having a grain size of 20 to 300 μm, the aluminum alloy comprising Mn of 0.50 to 2.00 mass %, Mg of 0.40 to 2.00 mass %, Si of 1.50 mass % or less, Fe of 1.00 mass % or less, and Ti of 0.10 to 0.30 mass %, and optionally one or two or more of Cu of 1.20 mass % or less, Zr of 0.30 mass % or less, and Cr of 0.30 mass % or less, with the balance being aluminum and inevitable impurities, the brazing material being formed of an aluminum alloy comprising Si of 4.00 to 13.00 mass and optionally one or two or more of Bi of 1.00 mass or less, Na of 0.050 mass % or less, Sr of 0.050 mass % or less, Sb of 0.050 mass % or less, Mg of 2.00 mass % or less, Zn of 8.00 mass or less, Cu of 4.00 mass % or less, In of 0.100 mass % or less, Sn of 0.100 mass % or less, and Fe of 1.00 mass % or less, with the balance being aluminum and inevitable impurities, the sacrificial anode material being formed of aluminum or an aluminum alloy comprising Zn of 8.00 mass % or less, and optionally one or two or more of Mn of 2.00 mass % or less, Mg of 3.00 mass % or less, Si of 1.50 mass % or less, Fe of 1.00 mass or less, Cu of 1.00 mass % or less, Ti of 0.30 mass % or less, Zr of 0.30 mass % or less, Cr of 0.30 mass % or less, In of 0.100 mass % or less, and Sn of 0.100 mass % or less, with the balance being aluminum and inevitable impurities, and in a drop-type fluidity test, a ratio α (α=K a /K b ) of a fluid coefficient K a after a 5% strain is applied to a fluid coefficient K b before the strain is applied being 0.50 or more.

26 . A method for manufacturing the aluminum alloy brazing sheet according to claim 23 , the method comprising executing at least hot working, cold working, one or more intermediate annealings between rolling passes in the cold working, and final annealing after a last pass of the cold working on a stacked structure acquired by stacking a brazing material ingot and a core material ingot in this order to acquire the aluminum alloy brazing sheet, wherein
the core material ingot is formed of an aluminum alloy comprising Mn of 0.50 to 2.00 mass %, Mg of 0.40 to 2.00 mass %, Si of 1.50 mass % or less, Fe of 1.00 mass % or less, and Ti of 0.10 to 0.30 mass %, and optionally one or two or more of Cu of 1.20 mass % or less, Zr of 0.30 mass % or less, and Cr of 0.30 mass % or less, with the balance being aluminum and inevitable impurities, the brazing material ingot is formed of an aluminum alloy comprising Si of 4.00 to 13.00 mass %, and optionally one or two or more of Bi of 1.00 mass % or less, Na of 0.050 mass % or less, Sr of 0.050 mass % or less, Sb of 0.050 mass % or less, Mg of 2.00 mass % or less, Zn of 8.00 mass % or less, Cu of 4.00 mass % or less, In of 0.100 mass % or less, Sn of 0.100 mass or less, and Fe of 1.00 mass % or less, with the balance being aluminum and inevitable impurities, and a working ratio (working ratio=((t a −t b )/t a )×100) of a thickness t b before the final annealing to a thickness t a after last intermediate annealing among the intermediate annealings is 20 to 70%.

27 . A method for manufacturing the aluminum alloy brazing sheet according to claim 24 , the method comprising executing at least hot working, cold working, one or more intermediate annealings between rolling passes in the cold working, and final annealing after a last pass of the cold working on a stacked structure acquired by stacking a brazing material ingot, a core material ingot, and a brazing material ingot in this order to acquire the aluminum alloy brazing sheet, wherein
the core material ingot is formed of an aluminum alloy comprising Mn of 0.50 to 2.00 mass %, Mg of 0.40 to 2.00 mass %, Si of 1.50 mass % or less, Fe of 1.00 mass % or less, and Ti of 0.10 to 0.30 mass %, and optionally one or two or more of Cu of 1.20 mass % or less, Zr of 0.30 mass % or less, and Cr of 0.30 mass % or less, with the balance being aluminum and inevitable impurities, each of the brazing material ingots is formed of an aluminum alloy comprising Si of 4.00 to 13.00 mass % and optionally one or two or more of Bi of 1.00 mass % or less, Na of 0.050 mass % or less, Sr of 0.050 mass % or less, Sb of 0.050 mass % or less, Mg of 2.00 mass % or less, Zn of 8.00 mass % or less, Cu of 4.00 mass % or less, In of 0.100 mass or less, Sn of 0.100 mass or less, and Fe of 1.00 mass or less, with the balance being aluminum and inevitable impurities, and a working ratio (working ratio=((t a −t b )/t a )×100) of a thickness t b before the final annealing to a thickness t a after last intermediate annealing among the intermediate annealings is 20 to 70%.

28 . A method for manufacturing the aluminum alloy brazing sheet according to claim 25 , the method comprising executing at least hot working, cold working, one or more intermediate annealings between roll

Assignees

• Uacj Corp
• Denso Corp

Inventors

• YAMAYOSHI Tomoki
• Kumagai Hidetoshi
• Tanaka Hirokazu
• Toyama Taketoshi
• Sugimoto Naoki
• Honma Nobuhiro
• Yamada Shogo

Classifications

• B23K35/0238

  layered · CPC title

• B32B15/016

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

• C22C21/08

  with silicon · CPC title

• C22F1/043

  of alloys with silicon as the next major constituent · CPC title

• B23K35/288 Primary

  with Sn or Zn · CPC title