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Manufacturing method of aluminum alloy brazing sheet

A manufacturing method and technology for aluminum alloys, applied in manufacturing tools, chemical instruments and methods, welding equipment, etc., can solve the problems of reducing the amount of brazing filler metal, insufficient brazing, and increasing the preferential corrosion susceptibility of the joint, achieving light weight. Good quantitative properties, excellent brazing properties, and the effect of inhibiting preferential corrosion

Active Publication Date: 2021-07-27
FURUKAWA SKY ALUMINUM CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this technology, no study has been made on the structure of the solder. For example, when the length of the joint is long, the inflow of the solder required for brazing is insufficient, and the brazing property becomes insufficient, or the joint The problem that the preferential corrosion susceptibility of the part increases
In addition, Zn is only added to the Al-Si alloy brazing filler metal with a reduced amount of brazing filler metal, and there is no consideration for the corrosion resistance of the other side clad with the Al-Si alloy brazing filler metal.

Method used

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  • Manufacturing method of aluminum alloy brazing sheet
  • Manufacturing method of aluminum alloy brazing sheet
  • Manufacturing method of aluminum alloy brazing sheet

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Embodiment

[0159] Next, the present invention will be described in more detail based on examples of the present invention and comparative examples, but the present invention is not limited thereto.

[0160] Cast the 1st solder alloy with the alloy composition shown in Table 1, the core material alloy with the alloy composition shown in Table 2, and the 2nd solder alloy with the alloy composition shown in Table 3 by semi-continuous casting respectively, The homogenization treatment shown in Table 4 was performed after face cutting each of both surfaces. Both the ingots of the core material and the first brazing filler metal were face-cut to have a plate thickness of 400 mm. The cast ingot of the first brazing filler metal was subjected to a heating stage at 450° C. for 3 hours before hot rolling, and hot rolled to a thickness of 50 mm. In addition, in Tables 1 to 3, "-" means less than the measurement limit.

[0161] Table 1

[0162]

[0163] Table 2

[0164]

[0165] table 3

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Abstract

The present invention provides an aluminum alloy brazing sheet, a method for manufacturing the same, and a method for manufacturing a heat exchanger for an automobile. The brazing filler metal and the second brazing filler metal clad on the other surface, the core material, the first brazing filler metal and the second brazing filler metal are made of aluminum alloys with predetermined compositions respectively, and the first brazing filler metal and the second brazing filler metal are made of Composed of an aluminum alloy with sacrificial anode function and brazing function, in the second brazing filler metal, there are 2000 pieces / mm of Al-Si-Fe-based intermetallic compounds with an equivalent circle diameter of 0.5-80.0 μm 2 the following.

Description

technical field [0001] The present invention relates to an aluminum alloy brazing sheet excellent in corrosion resistance and a method for producing the same. Specifically, it relates to an aluminum alloy brazing sheet suitable for constituting a heat exchanger such as an oil cooler and a method for manufacturing the same. Furthermore, the present invention relates to a method of manufacturing an automotive heat exchanger using the aluminum alloy brazing sheet. Background technique [0002] Aluminum alloys are lightweight, have high thermal conductivity, and can achieve high corrosion resistance with proper treatment, so they are used in automotive heat exchangers such as coolers, capacitors, evaporators, heaters, intercoolers, and oil coolers Wait. As the forming part of the flow path of the heat exchanger for automobiles, the core material is made of Al-Mn alloy such as 3003 alloy, and the brazing material of Al-Si alloy or the sacrificial anode material of Al-Zn alloy is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00B23K35/22B23K35/28C22F1/04C22F1/043C22F1/053C22F1/00
CPCB23K35/0238B23K35/286B23K35/3605B32B15/016C22C21/00C22C21/02C22C21/04C22C21/10C22F1/00C22F1/04C22F1/043F28D1/0325F28D1/0391F28F21/084F28F21/089F28F2275/045B23K35/288B23K2101/14
Inventor 金铜俊矢安藤诚小路知浩熊谷英敏
Owner FURUKAWA SKY ALUMINUM CORP
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