Patent ID: 9138833
Filing Date: 2015-09-22
Classification: B23K,B32B,C22C,C22F,F28F

Abstract:
1. An aluminum alloy brazing sheet comprising: a core material comprising Si in a content of 0.5 to 1.1 percent by mass, Mn in a content of 0.6 to 2.0 percent by mass, Cu in a content of 0.5 to 1.1 percent by mass, Mg in a content of 0.05 to 0.45 percent by mass, and Ti in a content of 0.05 to 0.25 percent by mass, with the remainder including aluminum and inevitable impurities; a clad material lying on one side of and in direct contact with the core material, having a thickness of from 25 to 50 μm, and comprising Si in a content of more than 0.5 percent by mass but 1.1 percent by mass or less, Mn in a content of 0.01 to 0.95 percent by mass, and Zn in a content of 3.0 to 6.0 percent by mass, with the remainder including aluminum and inevitable impurities; and a filler material lying on the other side of and in direct contact with the core material, having a thickness of from 36 to 55 μm, and comprising Si in a content of 7.0 to 12 percent by mass, with the remainder including aluminum and inevitable impurities, wherein the core material has a grain size of 50 μm or more but less than 300 μm in a rolling direction after the aluminum alloy brazing sheet is subjected to a heat treatment at a temperature of 380° C. or higher for 20 minutes, which includes brazing at a temperature of 595° C. for 3 minutes, and wherein the aluminum alloy brazing sheet has a tensile strength after the brazing at 595° C. for 3 minutes of at least 170 MPa.