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Aluminum alloy brazing sheet and heat exchanger

A technology of heat exchangers and aluminum alloys, applied in heat exchange equipment, heat exchanger shells, indirect heat exchangers, etc., can solve problems such as joint gaps, and achieve good brazing and corrosion resistance effects

Inactive Publication Date: 2011-10-05
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the Si concentration of the brazing filler metal is relatively low and Mn is added, even if it is melted by brazing heating, the fluidity of the molten brazing filler metal is still suppressed, so the molten brazing filler metal that flows to the junction with the pipe and accumulates There is also less material, and there may be gaps at the joints

Method used

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  • Aluminum alloy brazing sheet and heat exchanger
  • Aluminum alloy brazing sheet and heat exchanger
  • Aluminum alloy brazing sheet and heat exchanger

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] As mentioned above, the form for carrying out this invention was demonstrated, and the implementation which confirmed the effect of this invention is compared with the comparative example which does not satisfy the requirement of this invention below, and it demonstrates concretely. In addition, this invention is not limited by this Example.

[0071] (production of test materials)

[0072] Through continuous casting, melting and casting have the aluminum alloys for the core material (C) and the aluminum alloys for the brazing material (F) having the composition shown in Table 1, as well as the sacrificial anode material (S) containing Zn: 3 mass % aluminum alloy to obtain ingots. The surface of the ingot was face-milled, and the ingot for brazing filler metal and sacrificial anode material was cut to a predetermined thickness matching the coating ratio to form a thick plate, and then a homogenization heat treatment was performed for 4 hours. The homogenization heat tr...

Embodiment 2

[0093] (Manufacturing of brazed structures)

[0094] For the test materials No. 1 and 5 (see Table 1) of Example 1, the pipe was roll-formed into a flat pipe shape, and the state of joining (splicing) on ​​both sides was simulated, and a brazed structure with the following structure was produced. For test material No.1-2~1-7, the aluminum alloy brazing plate with the same specifications as test material No.1 of Example 1 is used, and for test material No.5-2, the test material of Example 1 is used Aluminum alloy brazing plate of the same specification as No.5. In addition, for test materials Nos. 1-5 and 5-2, aluminum alloy brazing sheets manufactured by the same method as pipe materials were used for the fin materials. The aluminum alloy brazing sheet for the fin material is made of the same JIS3003 alloy as the aluminum alloy sheet, and the brazing filler metal is the same as that of the test material No. Al-10% Si alloy (see Table 1), the thickness is 0.1mm which is the s...

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Abstract

The present invention provides an aluminum alloy brazing sheet that is applied particularly to a tube material of a heat exchanger and is excellent in brazability and erosion resistance. The aluminum alloy brazing sheet has a core material comprising an Al-Mn system alloy and a brazing filler metal comprising an Al-Si system alloy containing Fe by 0.45 mass % or less on one surface or both the surfaces of the core material and is characterized in that, after subjected to a brazing treatment for 3 minutes at 600 DEG C, the area ratio of eutectic Si that is the flow passage of the brazing filler metal in a cross section of a solidified brazing filler metal is 35% or less; and the grain size in the rolling direction at the center section in the sheet thickness direction of the core material is 80 micrometers m or more.

Description

technical field [0001] The present invention relates to an aluminum alloy brazing plate and a heat exchanger for automobiles using it. Background technique [0002] Heat exchangers such as condensers, evaporators, and intercoolers installed in automobiles are mainly constructed by alternately overlapping and combining flattened tubular tubes constituting fluid passages and fins that corrugate plates. Tubes are fitted and assembled on a plate (header) that is press-formed from a plate so that the fluid passages are assembled (see figure 1 ). These components are brazed and heated in an assembled state, whereby the tubes and fins, and the tubes and plates are respectively joined, and a heat exchanger is manufactured. These tubes, plates and fins are applied with aluminum alloy materials for brazing, or cladding materials with aluminum alloy as the core material and brazing filler metal composed of Al-Si alloy layered on it, that is, aluminum alloy brazing material. Weld pla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/20C22C21/00B23K35/28F28F21/08B23K35/22
CPCC22C21/02F28F21/089F28F9/18F28D1/05366B23K2203/10B23K1/0014B23K35/286B32B15/016B23K1/0012C22F1/04F28F1/126C22C21/00B23K35/0233B23K2103/10
Inventor 泉孝裕植田利树木村申平鹤野招弘
Owner KOBE STEEL LTD
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