Patent ID: 8932728
Filing Date: 2015-01-13
Classification: B23K,B32B,C22C,F28F,Y10S,Y10T

Abstract:
1. An aluminum-alloy clad sheet to be formed into a heat exchanger by brazing, the aluminum-alloy clad sheet including at least a core aluminum alloy sheet and an aluminum-alloy sacrificial anti-corrosive material cladded with each other, wherein the aluminum-alloy clad sheet has an aluminum alloy composition containing, in percent by mass, 0.5 to 1.8% Mn, 0.2 to 1.5% Si, 0.05 to 1.2% Cu, and 0.03 to 0.3% Ti, containing Fe controlled to be 1.0% or less (including 0%), and containing one or more of 0.02 to 0.4% Cr, 0.02 to 0.4% Zr, and 0.02 to 0.4% Ni, with the remainder including Al and inevitable impurities, and precipitates each having a circle-equivalent diameter of 100 nm or less, the precipitates being observed by a transmission electron microscope (TEM) at 10,000 power on a rolling plane in the central part in the thickness of the core aluminum alloy sheet, have a grain size distribution wherein