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Aluminum composite material for use in thermal flux-free joining methods and method for producing same

An aluminum composite material and thermal bonding technology, applied in the direction of welding/cutting media/materials, chemical instruments and methods, applications, etc., can solve the problems of incompatible use of flux, high cost, etc.

Active Publication Date: 2018-06-08
HYDRO ALUMINIUM ROLLED PROD GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the two-layer construction of the aluminum solder layer has the disadvantage that higher costs occur in the production of the two-layer aluminum solder layer
Furthermore, an important disadvantage of the usual two-layer construction, for example with the outer cladding of pure aluminum, is that it is not compatible with fluxes
Insufficient brazing results, e.g. due to a temporarily worse furnace atmosphere with too high oxygen partial pressure or too high humidity, cannot be compensated by adding flux

Method used

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  • Aluminum composite material for use in thermal flux-free joining methods and method for producing same
  • Aluminum composite material for use in thermal flux-free joining methods and method for producing same
  • Aluminum composite material for use in thermal flux-free joining methods and method for producing same

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Embodiment Construction

[0138] In order to study the advantages of the aluminum composite material according to the present invention, as figure 1 Multiple tests were performed with a special brazing test configuration shown in perspective. In principle, the brazing test structure consists of three components in total, namely plate 1, angle plate 2 and support plate 3 for angle plate 2. The gusset 2 rests with its closed end 2a on a support plate 3 on the plate 1 . In contrast, the two leg ends 2b are placed on the plate 1, whereby, as figure 2 As shown in the side view, a gradually changing gap appears at the support point on the support plate 3 from the leg end 2b of the gusset 2 to the closed end 2a. The brazing gap 4 gradually increases from the corner end 2b of the gusset 2 to the closed end 2a. This progressively larger brazing gap 4 makes it possible to assess to what extent the brazing properties of the aluminum composite material of the plate 1 vary with different surface treatments.

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Abstract

The invention relates to an aluminum composite material for use in thermal flux-free joining methods, comprising at least one core layer, which consists of an aluminum core alloy, and at least one outer solder layer, which is provided on one side or both sides of the core layer and which consists of an aluminum solder alloy. The aim of proposing an aluminum composite material for use in a thermalflux-free joining method by means of which the soldering properties can be further optimized both in a vacuum and under shielding gas without the use of fluxes while avoiding the disadvantages known from the prior art is achieved in that the aluminum solder alloy has the following composition in wt%: 6.5%<=Si<=13%, Fe<=1%, 90 ppm<=Mg<=300 ppm, Bi<500 ppm, Mn<=0.15%, Cu<=0.3%, Zn<=3%, Ti<=0.3%, theremainder Al and unavoidable impurities of at most 0.05% individually and at most 0.15% in total, and the aluminum solder layer has a surface that has been pickled in an alkaline or acidic manner. The invention further relates to a method for producing an aluminum composite material, in particular an aluminum composite material according to the invention, wherein at least one core layer consisting of an aluminum core alloy is provided and at least one outer solder layer consisting of an aluminum solder alloy is applied to one side or both sides of the core layer. The invention further relatesto a method for thermally joining components and to a thermally joined construction.

Description

technical field [0001] The invention relates to an aluminum composite material for use in a flux-free thermal joining process, comprising at least one core layer consisting of an aluminum core alloy and at least one aluminum solder alloy disposed on one or both sides of the core layer constitute the outer solder layer. Furthermore, the invention relates to a method for producing an aluminum composite material, in particular an aluminum composite material according to the invention, in which method at least one core layer consisting of an aluminum core alloy is produced and on one side of the core layer Or at least one outer solder layer consisting of an aluminum solder alloy is applied on both sides. Furthermore, the invention relates to a method for thermally bonding components and a thermally bonded structure. Background technique [0002] Aluminum composite materials having at least one core layer consisting of an aluminum core alloy and at least one outer solder layer ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/28B23K35/02B32B15/01C22C21/02C22C21/04C22C21/00C22C21/08
CPCB23K35/286B23K35/0222B23K35/0233B32B15/016C22C21/00C22C21/02C22C21/04C22C21/08B23K35/288Y10T428/12764B23K2103/10B23K2101/14B23K1/0012
Inventor 卡特林·埃克哈德奥拉夫·居斯根托尔斯滕·里克特哈特莫特·扬森尼科·艾根
Owner HYDRO ALUMINIUM ROLLED PROD GMBH
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