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Title:
ALUMINUM ALLOY CLAD PLATE FOR HEAT EXCHANGER HAVING EXCELLENT EROSION RESISTANCE AND FORMABILITY
Document Type and Number:
Japanese Patent JP2003027166
Kind Code:
A
Abstract:

To provide an aluminum alloy clad plate which prevents the occurrence of erosion in the boundaries between a core material and brazing filler metals and has excellent formability.

The clad plate 1 is obtained by cladding a brazing filler metal 4 of an Al-Si alloy to one side of a core material 2 of an Al-Mn alloy, and cladding a brazing filler metal 3 of an Al-Si alloy to the other side of the core material 2 via an intermediate layer 5. The 0.2% proof stress of the clad plate 1 is controlled to 120 to 290% to that of a stock material. The core material 2 has a composition containing, by mass, 0.05 to 0.3% Cu, and the balance Al with inevitable impurities. The brazing filler metal 3 has a composition containing 7 to 13% Si and ≤5% Zn, and the balance Al with inevitable impurities, the intermediate layer 5 has a composition containing Al with inevitable impurities, or containing ≤7% Zn, and the balance Al with inevitable impurities, or containing one or more kinds selected from 0.1 to 2% Fe, 0.05 to 0.3% Zr and 0.1 to 0.3% Ti, and ≤7% Zn, and the balance Al with inevitable impurities, and its thickness is controlled to 30 to 80 μm as well.


Inventors:
UEDA TOSHIKI
TAKEZOE OSAMU
Application Number:
JP2001216194A
Publication Date:
January 29, 2003
Filing Date:
July 17, 2001
Export Citation:
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Assignee:
KOBE STEEL LTD
SHINKO ALCOA YUSO KIZAI KK
International Classes:
B23K35/28; C22C21/00; (IPC1-7): C22C21/00; B23K35/28
Attorney, Agent or Firm:
Dozo Isono