Aluminum alloy brazing sheet for heat exchanger
An aluminum alloy, brazing technology, applied in the direction of heat exchanger fixing, welding/cutting medium/material, application, etc., can solve the problems of insufficient corrosion protection and achieve excellent corrosion resistance
Active Publication Date: 2020-04-10
FURUKAWA SKY ALUMINUM CORP
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Problems solved by technology
However, in this case, after the fins are consumed by corrosion, when the fins are detached from the tubes due to the corrosion of the junction of the fins and the tubes, even if the fins are normally joined and remain, the distance from the fins Corrosion protection is not sufficient for remote locations
Method used
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[0094] In order to manufacture the tubes constituting the refrigerant flow path of the heat exchanger, the aluminum alloys for the intermediate layer shown in Table 1, the aluminum alloys for the core material shown in Table 2, and the aluminum alloys for the air-side brazing layer shown in Table 3 were cast. Alloy, alloy for inner solder layer. The aluminum alloy ingot for the intermediate layer and the aluminum alloy ingot for the core material were subjected to a homogenization treatment at 600° C. for 10 hours.
[0095] Then, the surface of any aluminum alloy ingot was face-milled, and the aluminum alloy ingot for the brazing material layer and the aluminum alloy ingot for the intermediate layer were hot-rolled to a predetermined thickness to obtain the ingots shown in Table 4. 4-layer composite material method, which is combined separately and hot-rolled.
[0096]Thereafter, cold rolling was performed to a plate thickness of 0.3 mm without intermediate annealing, and rec...
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An aluminum alloy brazing sheet for a heat exchanger is characterized by comprising a four-layer material in which an air-side brazing filler layer, an intermediate layer, a core material and an innerbrazing filler layer are cladded and laminated, wherein: the intermediate layer is composed of an aluminum alloy containing 0.2-0.35 mass% of Mn (exclusive of 0.35), at most 0.6 mass% of Si, at most0.7 mass% of Fe, at most 0.1 mass% of Cu, and the remainder comprising Al and inevitable impurities; the core material is composed of an aluminum alloy containing at most 1.2 mass% of Si, at most 1.0mass% of Fe,0.3-1.0 mass% of Cu, 0.5-2.0 mass% of Mn, and the remainder comprising Al and inevitable impurities; and the air-side brazing filler layer and the inner brazing filler layer are composed of an aluminum alloy containing 4-13 mass% of Si, and the remainder comprising Al and inevitable impurities. The present invention can provide an aluminum alloy brazing sheet for producing a member ofa heat exchanger with excellent corrosion resistance.
Description
technical field [0001] The invention relates to an aluminum alloy brazing sheet for a heat exchanger, and relates to an aluminum alloy brazing sheet used for making parts such as tubes, headers, and boxes of heat exchangers that must have a closed space inside. Background technique [0002] Aluminum alloys that are lightweight and have good thermal conductivity are generally used in automotive heat exchangers such as evaporators, condensers, radiators, and heaters. In these heat exchangers, for example, the refrigerant passage is formed by processing the aluminum alloy plate into a predetermined shape, and the fluoride-based flux is adhered to the surface and the joint part, and the fin material and other parts are assembled into a predetermined structure. , A method of brazing joints performed in a furnace with an inert gas atmosphere. [0003] In recent years, from the viewpoint of reducing environmental loads, heat exchangers have been reduced in weight in order to impro...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C22C21/00B23K35/14B23K35/22B23K35/28F28F21/08C22F1/00C22F1/04
CPCB23K35/28C22F1/04B23K35/286B32B15/016C22C21/02B23K2101/14C22C21/00C22F1/043B23K35/0238F28F21/08B23K2103/10C22C21/14F28F21/084F28F2275/04
Inventor 北田有希绘山下尚希
Owner FURUKAWA SKY ALUMINUM CORP