Brazing sheets, articles formed from brazing sheets, and methods of forming articles

Patent metadata

Field	Value
Publication number	US-2024335911-A1
Application number	US-202218579879-A
Country	US
Kind code	A1
Filing date	Jun 24, 2022
Priority date	Aug 3, 2021
Publication date	Oct 10, 2024
Grant date	—

Abstract

Brazing sheets, articles formed from or including all or a portion of brazing sheets, and methods of forming articles are provided. A brazing sheet comprising a core layer, a brazing layer, and an interliner layer intermediate the core layer and the brazing layer. The core layer comprises a first aluminum alloy having a first recrystallization temperature. The interliner layer comprises a 3XXX series aluminum alloy having a second recrystallization temperature greater than the first recrystallization temperature. The 3XXX series aluminum alloy comprises, in weight percentages based on total weight of the 3XXX series aluminum alloy: 0.01 to 0.2 silicon; 0 to 0.6 copper; 0.8 to 1.9 manganese; 0 to 0.2 chromium; 0 to 0.15 zirconium; 0 to 0.4 iron; 0 to 3 zinc; 0 to 0.2 magnesium; 0 to 0.3 titanium; 0 to 0.1 vanadium; 0 to 0.5 bismuth; aluminum; and impurities.

First claim

What is claimed is:

1 . A brazing sheet comprising:
a core layer comprising a first aluminum alloy having a first recrystallization temperature; a brazing layer comprising a 4XXX series aluminum alloy; and an interliner layer intermediate the core layer and the brazing layer, and comprising a 3XXX series aluminum alloy having a second recrystallization temperature and comprising, in weight percentages based on total weight of the 3XXX series aluminum alloy:
0.01 to 0.2 silicon;
0 to 0.6 copper;
0.8 to 1.9 manganese;
0 to 0.2 chromium;
0 to 0.15 zirconium;
0 to 0.4 iron;
0 to 3 zinc;
0 to 0.2 magnesium;
0 to 0.3 titanium;
0 to 0.1 vanadium;
0 to 0.5 bismuth;
aluminum; and
impurities,
wherein the second recrystallization temperature is greater than the first recrystallization temperature.

2 . The brazing sheet of claim 1 , wherein a sum of the weight percentages of manganese, chromium, titanium, zirconium, and vanadium in the 3XXX series aluminum alloy is at least 2.0.

3 . The brazing sheet of claim 1 , wherein a sum of the weight percentages of manganese, chromium, titanium, zirconium, and vanadium in the 3XXX series aluminum alloy is at least 2.1.

4 . The brazing sheet of claim 1 , wherein the 3XXX series aluminum alloy of the interliner layer comprises, in weight percentages based on total weight of the 3XXX series aluminum alloy:
0.02 to 0.1 silicon; 0.3 to 0.6 copper; 1.75 to 1.9 manganese; 0.1 to 0.2 chromium; 0 to 0.15 zirconium; 0.05 to 0.4 iron; 0 to 1 zinc; 0.01 to 0.1 magnesium; 0 to 0.3 titanium; 0 to 0.1 vanadium; 0 to 0.5 bismuth; aluminum; and impurities.

5 . The brazing sheet of claim 1 , wherein the core layer is at least partially recrystallized and the interliner layer is unrecrystallized.

6 . The brazing sheet of claim 1 , a first sum of the weight percentages of manganese, chromium, and vanadium in the interliner layer is greater than a second sum of the weight percentages of manganese, chromium, and vanadium in the core layer.

7 . The brazing sheet of claim 1 , wherein the core layer, the interliner layer, and the brazing layer are bonded together into the brazing sheet.

8 . The brazing sheet of claim 1 , wherein the first aluminum alloy comprises, in weight percentages based on total weight of the first aluminum alloy:
0 to 1.2 silicon; 0 to 1.0 copper; 0 to 0.25 zirconium; 0 to 0.8 iron; 0 to 2 manganese; 0 to 3 zinc; 0 to 1.5 magnesium; 0 to 0.25 titanium; 0 to 0.3 chromium; 0 to 0.5 bismuth; aluminum; and impurities.

9 . The brazing sheet of claim 1 , wherein:
the interliner layer is a first interliner layer disposed on a first side of the core layer; and a second brazing layer is disposed on a second side of the core layer opposite the first side of the core layer, wherein the second brazing layer comprises a 1XXX series aluminum alloy, a 3XXX series aluminum alloy, a 3XXX series aluminum alloy, a 4XXX series aluminum alloy or a 7XXX series aluminum alloy.

10 . The brazing sheet of claim 1 , wherein:
the brazing layer is a first brazing layer disposed on a first side of the core layer; the interliner layer is a first interliner layer; a second brazing layer is disposed on a second side of the core layer opposite the first side of the core layer, wherein the second brazing layer comprises a 1XXX series aluminum alloy, a 3XXX series aluminum alloy, a 4XXX series aluminum alloy or a 7XXX series aluminum alloy; and a second interliner layer is disposed intermediate the core layer and the second brazing layer.

11 . The brazing sheet of claim 1 , wherein the brazing sheet is suitable for at least one of controlled atmospheric brazing and vacuum brazing.

12 . The brazing sheet of claim 1 , wherein the 4XXX series aluminum alloy of each brazing layer individually comprises, in weight percentages based on total weight of the 4XXX series aluminum alloy:
5 to 15 silicon; 0 to 2.0 magnesium; 0 to 1.0 iron; 0 to 3.0 zinc; 0 to 2.0 copper; 0 to 1.0 manganese; 0 to 0.2 titanium; 0 to 0.3 bismuth; aluminum; and impurities.

13 . The brazing sheet of claim 1 , wherein:
the core layer comprises a first thickness in a range of 60% to 90% of a total thickness of the brazing sheet; each interliner layer comprises a second thickness in a range of 3% to 20% of the total thickness of the brazing sheet; and each brazing layer comprises a third thickness in a range of 3% to 20% of the total thickness of the brazing sheet.

14 . The brazing sheet of claim 1 , wherein the core layer is homogenized.

15 . A method for forming the brazing sheet of claim 1 , the brazing sheet comprising a core layer, at least one brazing layer, and at least one interliner layer, the method comprising:
homogenizing the core layer to form a homogenized core layer; hot working a workpiece comprising the 3XXX series aluminum alloy to form the at least one interliner layer; and hot rolling the at least one brazing layer, the at least one interliner layer, and the homogenized core layer together to form the brazing sheet.

16 . A brazing sheet formed by the method of claim 15 .

17 . A heat exchanger comprising a structural element comprising all or a portion of the brazing sheet of claim 1 .

18 . A method for forming an article, the method comprising:
contacting a first part comprising a first material with a second part comprising all or a portion of the brazing sheet of claim 1 ; and brazing the first part to the second part by a process comprising at least one of controlled atmospheric brazing and vacuum brazing.

19 . The method of claim 18 , wherein the first material comprises aluminum or an aluminum alloy.

20 . The method of claim 18 , wherein the article is a heat exchanger.

Assignees

• Arconic Tech Llc

Inventors

• Zonker Harry R
• Kulovits Andreas K

Classifications

• F28F21/084

  from aluminium or aluminium alloys · CPC title

• F28F21/089

  Coatings, claddings or bonding layers made from metals or metal alloys (F28F19/06 takes precedence) · CPC title

• C22C21/10

  with zinc as the next major constituent · CPC title

• C22C21/02

  with silicon as the next major constituent · CPC title

• B23K35/288

  with Sn or Zn · CPC title