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Method of producing an aluminum alloy brazing sheet

A technology of brazing sheet and manufacturing method, applied in manufacturing tools, chemical instruments and methods, welding medium, etc., can solve problems such as unusability

Inactive Publication Date: 2007-06-20
FURUKAWA SKY ALUMINUM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the pipe is added with Mg in the sacrificial anode material, it can be used as a raw material for welding flat tubes where the sacrificial anode material is not in contact with the joint surface, but it cannot be used for applications where the surface of the sacrificial anode material must be joined by brazing. Raw materials for flat tubes

Method used

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Examples

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Embodiment

[0066] Next, the present invention will be described in more detail based on examples, but the present invention is not limited thereto.

[0067] The core material, the intermediate material and the sacrificial anode material alloy with the metal components and compositions shown in Tables 1, 2, and 3 are respectively cast by mold casting, and after plane cutting is carried out on both sides respectively, finishing machining is carried out. Tables 4 and 5 Homogenization of core material, intermediate material and sacrificial anode material is carried out at the temperatures indicated. 4045 alloy was used as the brazing filler metal, and the brazing filler metal, the intermediate material and the sacrificial anode material were respectively rolled to a thickness of 6 mm by hot rolling. As shown in Tables 4 and 5, these alloy materials are combined on a core material with a thickness of 22mm. At this time, the cladding ratios of the brazing material, intermediate material and sa...

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Abstract

A method of producing an aluminum alloy brazing sheet which has a clad of a sacrificial anode material / a core alloy / an intermediate material / a filler alloy, each of which has a specific composition, wherein number density ratios N 1 / N 2 and N 1 / N 3 each are 1.5 or more, in which a number density ((the number of grains) / [mu]m 3 ) of an intermetallic compound having a sphere-equivalent grain diameter of 0.1 [mu]m or less present in the core alloy, the intermediate material, and the sacrificial anode material, is represented by N 1 , N 2 , and N 3 , respectively.

Description

technical field [0001] The present invention relates to a method for manufacturing an aluminum alloy brazing sheet used in a heat exchanger for automobiles, and in particular, to a method for forming cooling water or refrigerant passages suitable for heat exchangers such as radiators and condensers The manufacturing method of the aluminum alloy brazing sheet used as the material. Background technique [0002] Aluminum alloys are used in automotive heat exchangers such as radiators, condensers, evaporators, heaters, intercoolers, and the like because they are lightweight and have high thermal conductivity. Heat exchangers for automobiles are mainly manufactured by the brazing method. Usually, brazing is performed at a high temperature of about 600° C. using an Al—Si alloy brazing material. Therefore, there is a need for an aluminum alloy brazing sheet that is excellent in brazeability and has high strength and corrosion resistance after brazing. [0003] A heat exchanger m...

Claims

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Application Information

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IPC IPC(8): B32B15/01B23K35/24C22C21/00C22C21/02C22C21/10C22C21/12F28F21/08
CPCC22C21/10B32B15/016C22C21/14B23K35/286C22C21/02C22C21/00C22C21/08C22C21/16B23K35/28
Inventor 福元敦志新仓昭男
Owner FURUKAWA SKY ALUMINUM CORP
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