Aluminum alloy clad material and heat exchanger that includes tube obtained by forming the clad material

Patent metadata

Field	Value
Publication number	US-2016290743-A1
Application number	US-201314442520-A
Country	US
Kind code	A1
Filing date	Nov 12, 2013
Priority date	Nov 13, 2012
Publication date	Oct 6, 2016
Grant date	—

Abstract

An aluminum alloy clad material produces a heat exchanger tube that exhibits excellent outer-side corrosion resistance when formed into a tube. The aluminum alloy clad material includes a core material, an inner cladding material, and a sacrificial anode material, one side of the core material being clad with the inner cladding material, the other side of the core material being clad with the sacrificial anode material, the core material being formed of an Al—Mn alloy that includes 0.6 to 2.0 mass % of Mn and 0.4 mass % or less of Cu, with the balance being aluminum and unavoidable impurities, the inner cladding material being formed of an Al—Mn—Cu alloy that includes 0.6 to 2.0 mass % of Mn and 0.2 to 1.5 mass % of Cu, with the balance being aluminum and unavoidable impurities, and the sacrificial anode material being formed of an Al—Zn alloy that includes 0.5 to 10.0 mass % of Zn, with the balance being aluminum and unavoidable impurities.

First claim

1 .- 9 . (canceled)

10 . An aluminum alloy clad material comprising a core material, an inner cladding material, and a sacrificial anode material, one side of the core material being clad with the inner cladding material, the other side of the core material being clad with the sacrificial anode material, the core material being formed of an Al—Mn alloy that comprises 0.6 to 2.0 mass % of Mn and 0.4 mass % or less of Cu, with the balance being aluminum and unavoidable impurities, the inner cladding material being formed of an Al—Mn—Cu alloy that comprises 0.6 to 2.0 mass % of Mn and 0.2 to 1.5 mass % of Cu, with the balance being aluminum and unavoidable impurities, and the sacrificial anode material being formed of an Al—Zn alloy that comprises 0.5 to 10.0 mass % of Zn, with the balance being aluminum and unavoidable impurities.

11 . The aluminum alloy clad material according to claim 10 , wherein the core material further comprises one or more of 0.01 to 0.3 mass % of Ti, 1.5 mass % or less of Si and 0.7 mass % or less of Fe.

12 . The aluminum alloy clad material according to claim 10 , wherein the inner cladding material further comprises one or more of 0.01 to 0.3 mass % of Ti, 1.5 mass % or less of Si and 0.7 mass % or less of Fe.

13 . The aluminum alloy clad material according to claim 10 , wherein the sacrificial anode material further comprises 1.0 to 4.0 mass % of Zn, and one or more of 1.5 mass % or less of Si, 0.7 mass % or less of Fe, and 1.5 mass % or less of Mn.

14 . The aluminum alloy clad material according to claim 10 , wherein the core material comprises 0.4 mass % or less of Cu so that the Cu content in the core material is lower than the Cu content in the inner cladding material by 0.2 mass % or more.

15 . The aluminum alloy clad material according to claim 11 , wherein the inner cladding material further comprises one or more of 0.01 to 0.3 mass % of Ti, 1.5 mass % or less of Si and 0.7 mass % or less of Fe.

16 . The aluminum alloy clad material according to claim 11 , wherein the sacrificial anode material further comprises 1.0 to 4.0 mass % of Zn, and one or more of 1.5 mass % or less of Si, 0.7 mass % or less of Fe, and 1.5 mass % or less of Mn.

17 . The aluminum alloy clad material according to claim 11 , wherein the core material comprises 0.4 mass % or less of Cu so that the Cu content in the core material is lower than the Cu content in the inner cladding material by 0.2 mass % or more.

18 . The aluminum alloy clad material according to claim 12 , wherein the sacrificial anode material further comprises 1.0 to 4.0 mass % of Zn, and one or more of 1.5 mass % or less of Si, 0.7 mass % or less of Fe, and 1.5 mass % or less of Mn.

19 . The aluminum alloy clad material according to claim 12 , wherein the core material comprises 0.4 mass % or less of Cu so that the Cu content in the core material is lower than the Cu content in the inner cladding material by 0.2 mass % or more.

20 . The aluminum alloy clad material according to claim 13 , wherein the core material comprises 0.4 mass % or less of Cu so that the Cu content in the core material is lower than the Cu content in the inner cladding material by 0.2 mass % or more.

21 . The aluminum alloy clad material according to claim 15 , wherein the sacrificial anode material further comprises 1.0 to 4.0 mass % of Zn, and one or more of 1.5 mass % or less of Si, 0.7 mass % or less of Fe, and 1.5 mass % or less of Mn.

22 . The aluminum alloy clad material according to claim 15 , wherein the core material comprises 0.4 mass % or less of Cu so that the Cu content in the core material is lower than the Cu content in the inner cladding material by 0.2 mass % or more.

23 . The aluminum alloy clad material according to claim 16 , wherein the core material comprises 0.4 mass % or less of Cu so that the Cu content in the core material is lower than the Cu content in the inner cladding material by 0.2 mass % or more.

24 . The aluminum alloy clad material according to claim 18 , wherein the core material comprises 0.4 mass % or less of Cu so that the Cu content in the core material is lower than the Cu content in the inner cladding material by 0.2 mass % or more.

25 . The aluminum alloy clad material according to claim 21 , wherein the core material comprises 0.4 mass % or less of Cu so that the Cu content in the core material is lower than the Cu content in the inner cladding material by 0.2 mass % or more.

26 . A heat exchanger produced by forming the aluminum alloy clad material according to claim 10 into a tube so that the inner cladding material defines a refrigerant passage, and the sacrificial anode material comes in contact with the atmosphere, assembling an aluminum fin with the tube, and brazing the aluminum fin and the tube.

Assignees

• Denso Corp
• Uacj Corp

Inventors

• OTSUKI Shusuke
• Teshima Shoei
• NAKASHITA Kouichi
• Hagihara Kouta
• Tanaka Toshikazu
• Fujimura Ryoko
• Yamashita Naoki
• Tanaka Hirokazu

Classifications

• C22C21/10

  with zinc as the next major constituent · CPC title

• B23K35/288

  with Sn or Zn · CPC title

• F28F19/06

  of metal · CPC title

• B32B15/016

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

• F28F21/084

  from aluminium or aluminium alloys · CPC title