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Aluminum alloy-brazing sheet for heat exchanger

A technology of aluminum alloy and brazing, applied in the direction of welding/cutting medium/material, welding medium, welding equipment, etc., can solve the problem of insufficient corrosion protection, and achieve the effect of excellent corrosion resistance

Active Publication Date: 2020-04-24
FURUKAWA SKY ALUMINUM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Aluminum alloy-brazing sheet for heat exchanger
  • Aluminum alloy-brazing sheet for heat exchanger
  • Aluminum alloy-brazing sheet for heat exchanger

Examples

Experimental program
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Embodiment

[0093] In order to manufacture the pipe material 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 brazing layer shown in Table 3 were cast. 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.

[0094] Then, face milling was performed on the surface of any aluminum alloy ingot, 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 plate thickness to obtain the 3 ingots shown in Table 4. Combine them separately by layer composite materials for hot rolling composite.

[0095] Thereafter, cold rolling was performed to a plate thickness of 0.3 mm without intermediate annealing, and recrystallization w...

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Abstract

Provided is an aluminum alloy-brazing sheet for a heat exchanger, the aluminum alloy-brazing sheet being a three-layered material in which a brazing material layer, an intermediate layer, and a core material are clad and laminated, wherein the intermediate layer is an aluminum alloy containing at least 0.2 mass% and less than 0.35 mass% of Mn, at most 0.6 mass% of Si, at most 0.7 mass% of Fe, andat most 0.1 mass% of Cu, with the remainder comprising Al and inevitable impurities, the core material is an aluminum alloy containing at most 1.2 mass% of Si, at most 1.0 mass% of Fe, 0.3-1.0 mass% of Cu, and 0.5-2.0 mass% of Mn, with the remainder comprising Al and inevitable impurities, and the brazing material layer is an aluminum alloy containing 4-13 mass% of Si, with the remainder comprising Al and inevitable impurities. According to the present invention, an aluminum alloy-brazing sheet for manufacturing a heat exchanger member having excellent corrosion resistance can be provided.

Description

technical field [0001] The present invention relates to an aluminum alloy brazing sheet for a heat exchanger, and relates to an aluminum alloy brazing sheet for making parts that must have a closed space inside a tube, header, box, etc. of a heat exchanger. 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 improve t...

Claims

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Application Information

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IPC IPC(8): C22C21/00B23K35/14B23K35/22B23K35/28F28F21/08C22F1/00C22F1/04
CPCB23K35/28C22F1/04F28F21/08B23K35/286B32B15/016C22C21/02C22C21/08C22C21/10C22C21/14C22C21/16C22F1/047C22F1/05C22F1/053C22F1/043B23K35/0233F28F21/084F28F21/089Y10T428/12764
Inventor 北田有希绘山下尚希
Owner FURUKAWA SKY ALUMINUM CORP