Patent ID: 11969830
Assignee: KOBE STEEL, LTD.
Field: Machine tools (Mechanical engineering)
Classification: CPC B  C | IPC B  C

Claim 18:
19. An aluminum alloy brazing sheet comprising:
a core material;
a sacrificial material provided on one surface of the core material;
a brazing filler material provided on the other surface side of the core material; and
an intermediate layer provided between the core material and the brazing filler material,
wherein the core material comprises from 0.40 mass % to 0.80 mass % of Si, from 0.80 mass % to 1.80 mass % of Mn, from 0.80 mass % to 1.10 mass % of Cu, from 0.30 mass % to 0.70 mass % of Mg, and Al,
the sacrificial material comprises from 0.30 mass % to 1.00 mass % of Si, from 3.00 mass % to 6.00 mass % of Zn, from greater than 0 mass % to 0.20 mass % of Mn, and Al,
the intermediate layer comprises from 0.30 mass % to 1.10 mass % of Si, from 0.80 mass % to 1.80 mass % of Mn, from 0.60 mass % to 1.10 mass % of Cu, and Al, and
the brazing filler material comprises from 5 mass % to 15 mass % of Si and Al,
wherein when an Al—Si brazing filler material in an original size of 15 mm×20 mm is placed on the aluminum alloy brazing sheet in a size of 40 mm×70 mm such that the Al—Si brazing filler material contacts the sacrificial material of the aluminum alloy brazing sheet, and heated at a temperature of 577° C. or higher for 2 to 3 minutes in a nitrogen atmosphere, a spreading area of the Al—Si brazing filler material, which is an area of the Al—Si brazing filler material beyond the original size of the Al—Si brazing filler material, is greater than 130 mm2.