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Highly corrosion-resistant aluminum alloy brazing sheet, process for production of the brazing sheet, and highly corrosion-resistant heat exchanger equipped with the brazing sheet

A technology of brazing sheet and manufacturing method, which is applied in the field of heat exchangers with high corrosion resistance, can solve problems such as difficulty in obtaining corrosion resistance, and achieve the effects of excellent brazing performance, high corrosion resistance, and light-weight thermal conductivity

Active Publication Date: 2012-05-23
FURUKAWA SKY ALUMINUM CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the past technology, it is difficult to obtain the corrosion resistance that can withstand the use in this corrosive environment

Method used

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  • Highly corrosion-resistant aluminum alloy brazing sheet, process for production of the brazing sheet, and highly corrosion-resistant heat exchanger equipped with the brazing sheet
  • Highly corrosion-resistant aluminum alloy brazing sheet, process for production of the brazing sheet, and highly corrosion-resistant heat exchanger equipped with the brazing sheet
  • Highly corrosion-resistant aluminum alloy brazing sheet, process for production of the brazing sheet, and highly corrosion-resistant heat exchanger equipped with the brazing sheet

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Embodiment

[0122] Hereinafter, the present invention will be described in further detail based on examples, but the present invention is not limited by the following examples.

[0123] The sacrificial anode material with the alloy composition shown in Table 1 and the heart material alloy with the alloy composition shown in Table 2 were respectively cast by DC casting method, and plane cutting was performed on both sides respectively. The thickness of the ingot of the heart material and the sacrificial anode material at this time was both 500 mm. Table 1 shows the cooling rate of the sacrificial anode material in the casting process and the value of Sic / 5. Also, unlike the sacrificial anode material, JIS 4045 alloy was used as the brazing material, and the sacrificial anode material and the 4045 alloy brazing material were subjected to a heating process and a hot rolling process, respectively, and were rolled to desired thicknesses. Table 3 shows the conditions of the heating step and th...

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Abstract

Disclosed are: an aluminum alloy brazing sheet which does not undergo the diffusion of a molten brazing filler material into a core material during brazing and therefore has good brazing properties, and has excellent corrosion resistance against an exhaust gas condensate after brazing; a process for producing the aluminum alloy brazing sheet; and a highly corrosion-resistant heat exchanger utilizing the aluminum alloy brazing sheet. Specifically disclosed is a highly corrosion-resistant aluminum alloy brazing sheet which comprises: an aluminum alloy core material; a galvanic anode material that is cladded on one surface of the core material; and an Al-Si-based alloy brazing filler material that is cladded on the other surface of the core material.; The brazing sheet is characterized in that the galvanic anode material contains 2.5-7.0 mass% of Si, 1.0-5.5 mass% of Zn and 0.05-1.0 mass% of Fe, with the remainder being Al and unavoidable impurities. The brazing sheet is also characterized in that the clad thickness of the galvanic anode material is 25-80 [mu]m.

Description

technical field [0001] The present invention relates to high-corrosion-resistant aluminum alloy brazing sheets and their manufacturing methods, and high-corrosion-resistant heat exchangers using the same, in particular, to high-temperature compressed air or refrigerants used as heat exchangers such as intercoolers A highly corrosion-resistant aluminum alloy brazing sheet material used as a passage constituting material, a manufacturing method thereof, and a highly corrosion-resistant heat exchanger using the same. Background technique [0002] Aluminum alloy has light weight and high thermal conductivity, and can achieve high corrosion resistance by proper treatment, so it is used in heat exchangers for automobiles, such as radiators, condensers, evaporators, heaters, intercoolers, etc. As a tube material for heat exchangers for automobiles, a two-layer cladding of Al-Mn-based alloy such as 3003 alloy as the core material and a sacrificial anode material of Al-Si-based alloy...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22F1/04C22F1/043C22F1/053C22F1/00C22F1/047
Inventor 神谷定行原田真树斋藤莊史外山猛敏安藤诚大谷良行新仓昭男兒岛洋一
Owner FURUKAWA SKY ALUMINUM CORP
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