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

Claim 17:
18. The aluminum alloy brazing sheet according to claim 1, wherein when a fluoride-based flux is applied to a surface of the brazing filler material of the aluminum alloy brazing sheet in a size of 25 mm×55 mm, an aluminum alloy plate having a thickness of 1 mm is placed on the surface of the brazing filler material via a stainless steel spacer having a diameter of 2 mm and fixed by a wire such that a clearance is formed between the aluminum alloy plate and the aluminum alloy brazing sheet, and the aluminum alloy brazing sheet, the aluminum alloy plate, and the stainless steel spacer fixed by the wire are heated at a temperature of 577° C. or higher for 3 to 4 minutes in a nitrogen atmosphere, the clearance is filled at a length of at least 15 mm.