Aluminum alloy brazing sheet

Patent metadata

Field	Value
Publication number	US-11969830-B2
Application number	US-202117759889-A
Country	US
Kind code	B2
Filing date	Jan 29, 2021
Priority date	Feb 4, 2020
Publication date	Apr 30, 2024
Grant date	Apr 30, 2024

Abstract

An aluminum alloy brazing sheet including a core material, a sacrificial material provided on one surface of the core material, a brazing filler material provided on the other surface side of the core material, and an intermediate layer provided between the core material and the brazing filler material. The core material contains Si: 0.30 to 1.00 mass %, Mn: 0.50 to 2.00 mass %, Cu: 0.60 to 1.20 mass %, Mg: 0.05 to 0.80 mass %, and Al. The sacrificial material contains Si: 0.10 to 1.20 mass %, Zn: 2.00 to 7.00 mass %, Mn: 0.40 mass % or less, and Al. The intermediate layer contains Si: 0.05 to 1.20 mass %, Mn: 0.50 to 2.00 mass %, Cu: 0.10 to 1.20 mass %, and Al.

First claim

The invention claimed is:

1. An aluminum alloy brazing sheet comprising:
a core material;
a sacrificial material provided on one surface of the core material;
a brazing filler material provided on the other surface side of the core material; and
an intermediate layer provided between the core material and the brazing filler material,
wherein the core material comprises from 0.30 mass % to 1.00 mass % of Si, from 0.50 mass % to 2.00 mass % of Mn, from 0.60 mass % to 1.20 mass % of Cu, from 0.05 mass % to 0.80 mass % of Mg, and Al,
the sacrificial material comprises from 0.10 mass % to 1.20 mass % of Si, from 2.00 mass % to 7.00 mass % of Zn, from greater than 0 mass % to 0.20 mass % of Mn, and Al, and
the intermediate layer comprises from 0.05 mass % to 1.20 mass % of Si, from 0.50 mass % to 2.00 mass % of Mn, from 0.10 mass % to 1.20 mass % of Cu, and Al,
wherein when an Al—Si brazing filler material in an original size of 15 mm×20 mm is placed on the aluminum alloy brazing sheet in a size of 40 mm×70 mm such that the Al—Si brazing filler material contacts the sacrificial material of the aluminum alloy brazing sheet, and heated at a temperature of 577° C. or higher for 2 to 3 minutes in a nitrogen atmosphere, a spreading area of the Al—Si brazing filler material, which is an area of the Al—Si brazing filler material beyond the original size of the Al—Si brazing filler material, is greater than 130 mm 2 .

2. The aluminum, alloy brazing sheet according to claim 1 , wherein the intermediate layer further comprises 0.20 mass % or less of Mg.

3. The aluminum alloy brazing sheet according to claim 1 , wherein the core material comprises at least 0.30 mass % of Mg.

4. The aluminum alloy brazing sheet according to claim 1 , wherein the intermediate layer further comprises at least one selected from the group consisting of 0.30 mass % or less of Ti, 0.30 mass % or less of Cr, and 0.30 mass % or less of Zr.

5. The aluminum alloy brazing sheet according to claim 1 , wherein the core material further comprises at least one selected from the group consisting of 0.30 mass % or less of Ti, 0.30 mass % or less of Cr, and 0.30 mass % or less of Zr.

6. The aluminum alloy brazing sheet according to claim 1 , wherein the sacrificial material further comprises at least one selected from the group consisting of 0.30 mass % or less of Ti, 0.30 mass % or less of Cr, and 0.30 mass % or less of Zr.

7. The aluminum alloy brazing sheet according to claim 2 , wherein the core material comprises at least 0.03 mass % of Mg.

8. The aluminum, alloy brazing sheet according to claim 2 , wherein the intermediate layer further comprises at least one selected from the group consisting of 0.30 mass % or less of Ti, 0.30 mass % or less of Cr, and 0.30 mass % or less of Zr.

9. The aluminum alloy brazing sheet according to claim 2 , wherein the core material further comprises at least one selected from the group consisting of 0.30 mass % or less of Ti, 0.30 mass % or less of Cr, and 0.30 mass % or less of Zr.

10. The aluminum alloy brazing sheet according to claim 2 , wherein the sacrificial material further comprises at least one selected from the group consisting of 0.30 mass % or less of Ti, 0.30 mass % or less of Cr, and 0.30 mass % or less of Zr.

11. The aluminum alloy brazing sheet according to claim 1 , wherein the brazing filler material comprises Si.

12. The aluminum alloy brazing sheet according to claim 1 , wherein the brazing filler material comprises from 5 mass % to 15 mass % of Si, and Al.

13. The aluminum alloy brazing sheet according to claim 1 , wherein the core material comprises from 0.40 mass % to 0.80 mass % of Si, from 0.80 mass % to 1.80 mass % of Mn, from 0.80 mass % to 1.10 mass % of Cu, from 0.30 mass % to 0.70 mass % of Mg, and Al,
the sacrificial material comprises from 0.30 mass % to 1.00 mass % of Si, from 3.00 mass % to 6.00 mass % of Zn, from greater than 0 mass % to 0.20 mass % of Mn, and Al,
the intermediate layer comprises from 0.30 mass % to 1.10 mass % of Si, from 0.80 mass % to 1.80 mass % of Mn, from 0.60 mass % to 1.10 mass % of Cu, and Al, and
the brazing filler material comprises from 5 mass % to 15 mass % of Si, and Al.

14. The aluminum alloy brazing sheet according to claim 1 ,
wherein the core material comprises from 0.50 mass % to 0.70 mass % of Si, from 1.20 mass % to 1.60 mass % of Mn, from 0.90 mass % to 1.10 mass % of Cu, from 0.40 mass % to 0.70 mass % of Mg, and Al,
the sacrificial material comprises from 0.40 mass % to 0.90 mass % of Si, from 4.00 mass % to 5.00 mass % of Zn, from greater than 0 mass % to 0.10 mass % of Mn, and Al,
the intermediate layer comprises from 0.50 mass % to 1.00 mass % of Si, from 1.20 mass % to 1.60 mass % of Mn, from 0.80 mass % to 1.00 mass of Cu, and Al, and
the brazing filler material comprises from 5 mass % to 15 mass % of Si, and Al.

15. The aluminum alloy brazing sheet according to claim 1 , wherein the sacrificial material comprises from 0.59 mass % to 0.78 mass % of Si; and from 4.00 mass % to 5.47 mass % of Zn.

16. The aluminum alloy brazing sheet according to claim 1 , wherein the sacrificial material comprises from greater than 0 mass % to 0.03 mass % of Mn.

17. The aluminum alloy brazing sheet according to claim 1 , wherein the aluminum alloy brazing sheet has a post-brazing strength of at least 190 MPa, the post-brazing strength being a tensile strength of the aluminum alloy brazing sheet after being heated at a temperature of 577° C. or higher for 7 to 8 minutes in a nitrogen atmosphere and then held at room temperature for 7 days.

18. The aluminum alloy brazing sheet according to claim 1 , wherein when a fluoride-based flux is applied to a surface of the brazing filler material of the aluminum alloy brazing sheet in a size of 25 mm×55 mm, an aluminum alloy plate having a thickness of 1 mm is placed on the surface of the brazing filler material via a stainless steel spacer having a diameter of 2 mm and fixed by a wire such that a clearance is formed between the aluminum alloy plate and the aluminum alloy brazing sheet, and the aluminum alloy brazing sheet, the aluminum alloy plate, and the stainless steel spacer fixed by the wire are heated at a temperature of 577° C. or higher for 3 to 4 minutes in a nitrogen atmosphere, the clearance is filled at a length of at least 15 mm.

19. An aluminum alloy brazing sheet comprising:
a core material;
a sacrificial material provided on one surface of the core material;
a brazing filler material provided on the other surface side of the core material; and
an intermediate layer provided between the core material and the brazing filler material,
wherein the core material comprises from 0.40 mass % to 0.80 mass % of Si, from 0.80 mass % to 1.80 mass % of Mn, from 0.80 mass % to 1.10 mass % of Cu, from 0.30 mass % to 0.70 mass % of Mg, and Al,
the sacrificial material comprises from 0.30 mass % to 1.00 mass % of Si, from 3.00 mass % to 6.00 mass % of Zn, from greater than 0 mass % to 0.20 mass % of Mn, and Al,
the intermediate layer comprises from 0.30 mass % to 1.10 mass % of Si, from 0.80 mass % to 1.80 mass % of Mn, from 0.60 mass % to 1.10 mass % of Cu, and Al, and
the brazing filler material comprises from 5 mass % to 15 mass % of Si and Al,
wherein when an Al—Si brazing filler material in an original size of 15 mm×20 mm is placed on the aluminum alloy brazing sheet in a size of 40 mm×70 mm such that the Al—Si brazing filler material contacts the sacrificial material of the aluminum alloy brazing sheet, and heated at a temp

Assignees

• Kobe Steel Ltd

Inventors

• Hashimoto Tatsuki
• Yoshida Kenichiro
• Shibuya Yuji
• Tsuruno Akihiro
• Miyano Yoshikazu
• Sugito Hajime
• Yamamoto Michiyasu
• Makita Masayuki
• FUJII Arisu
• Takewaka Shin
• Teramoto Hayaki
• Yamamoto Koichi
• Ninagawa Toshihide

Classifications

• B23K35/0238 Primary

  layered · CPC title

• B23K1/0012

  Brazing of heat exchangers · CPC title

• B23K35/288

  with Sn or Zn · CPC title

• C22C21/10

  with zinc as the next major constituent · CPC title

• B23K2101/14

  Heat exchangers · CPC title