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Aluminum-copper dissimilar metal pressure deposition welding method

A dissimilar metal, pressure technology, applied in metal processing equipment, welding equipment, non-electric welding equipment and other directions, can solve the problems of affecting joint strength, difficult to weld, limited mutual solubility, etc., to achieve a wide range of applications, good sealing, welding process simple effect

Inactive Publication Date: 2011-12-21
JIANGSU JINXIN ELECTRIC CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, since the melting points of the two materials differ by nearly 400°C, the mutual solubility is very limited. In the conventional fusion welding process, the mass fraction of Cu in the joint is generally about 30%, which inevitably produces brittle intermetallic compounds of aluminum and copper, which seriously affects the joint strength
Therefore, it is not easy to use the traditional fusion welding method for welding

Method used

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  • Aluminum-copper dissimilar metal pressure deposition welding method
  • Aluminum-copper dissimilar metal pressure deposition welding method

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Experimental program
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Embodiment Construction

[0017] step:

[0018] 1. Preparation

[0019] 1. Materials to be welded: two rectangular T2 copper blocks and 2A50 aluminum alloy blocks, respectively make the surfaces to be welded of the two materials flat, and the outer diameter of the T2 copper block to be welded is larger than that of the 2A50 aluminum alloy block to be welded outside diameter.

[0020] 2. Prepare CsF-AIF 3 Type protectant.

[0021] 3. Production process

[0022] 1. Remove the oil stain and oxide film on the outer surface of T2 copper block and 2A50 aluminum alloy block respectively;

[0023] 2. Place the T2 copper block in the mold cavity with the upper indenter in gaps, with the side to be welded facing up, and then evenly spread CsF-AIF on the upper surface of the T2 copper 3 Type protective agent layer, and then put the 2A50 aluminum alloy block on the CsF-AIF with the side to be welded facing down 3 Type protective agent layer;

[0024] 3. Through the heating control system, the mold cavity is...

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Abstract

The invention discloses a pressure cladding welding method for dissimilar metals of aluminum and copper, which belongs to the technical field of dissimilar metal welding. The present invention adopts the protective agent layer to prevent the two metal surfaces from being oxidized again during the heating process; the protective agent layer is heated and melted to remove the oxide film at the interface of the two metal joints, and at the same time, it floats out from around the aluminum alloy material to prevent the interface from being oxidized. It is oxidized again during the welding process, and at the same time improves the spreadability and wettability of the aluminum alloy material on the surface of the copper alloy material. The invention is simple and convenient to operate, not only can prevent interface oxidation, but finally realize high-quality and efficient connection of different metals.

Description

technical field [0001] The invention belongs to the technical field of dissimilar metal welding. Background technique [0002] The dissimilar metal connection structure has the excellent performance of the combination of the two materials, and has been widely used in the fields of national defense and national production, and its application prospects continue to expand. [0003] For example, copper has excellent electrical and thermal conductivity, but because copper is relatively expensive, it brings huge cost pressure to related companies in the field of electrical engineering. Aluminum and its aluminum alloys also have excellent physical and mechanical properties. In order to save production costs, aluminum or copper-aluminum welded parts are used to replace copper for some electrical products or components, which has become a trend in the development of the electrical and electric power industries. [0004] However, since the melting points of the two materials differ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/16B23K20/233B23K103/18
Inventor 汤金根王克鸿张帅周琦张德库尚晶
Owner JIANGSU JINXIN ELECTRIC CO LTD