Patent ID: 8524377
Filing Date: 2013-09-03
Classification: B23K,C22C,F28F,Y10T

Abstract:
1. An aluminum alloy clad sheet, comprising: (i) a core layer; (ii) a sacrificial layer disposed on one side of the core layer; and (iii) a brazing layer comprising an Al—Si alloy disposed on the other side of the core layer, wherein the core layer (i) comprises Al and, by mass, Si: 0.15% to 1.6%, Mn: 0.3% to 2.0%, Cu: 0.1% to 1.0%, and Ti: 0.02% to 0.30%, wherein the sacrificial layer (ii) comprises Al and, by mass, Zn: 4.0% to 10.0%, Cr: 0.01% to 0.5%, Si: 1.0% or less, excluding 0%, Mn: 2.0% or less excluding 0%, wherein a maximum size of Al—Mn, Al—Mn—Si, and Al—Cu intermetallic compounds precipitated in the sacrificial layer (ii) after brazing heating at 595° C. for 3 minutes in an electron micrograph of a cross section of the sacrificial layer (ii) vertical to a rolling direction of the sacrificial layer (ii) ranges from 10 nm to 1 μm in terms of equivalent circular diameter, wherein a number density of Al—Mn, Al—Mn—Si, and Al—Cu intermetallic compounds having an equivalent circular diameter in a range of 10 nm to 1 μm is 1×10 wherein an area percentage of Al—Mn, Al—Mn—Si, and Al—Cu intermetallic compounds having an equivalent circular diameter in the range of 10 nm to 1 μm is 4% or less.