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Aluminum copper dissimilar metal rotation friction welding method added with middle layer

A technology of rotary friction welding and dissimilar metals, applied in welding equipment, metal processing equipment, welding/welding/cutting items, etc., can solve the problem of low joint strength, achieve short welding time, increase joint strength, and low welding temperature Effect

Inactive Publication Date: 2017-01-25
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiency of low joint strength of the existing aluminum-copper dissimilar metal rotary friction welding method, the present invention provides a method of adding an intermediate layer to the aluminum-copper dissimilar metal rotary friction welding method

Method used

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  • Aluminum copper dissimilar metal rotation friction welding method added with middle layer
  • Aluminum copper dissimilar metal rotation friction welding method added with middle layer

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Embodiment 1

[0019] Embodiment 1: Rotary friction welding of 1100 pure aluminum and T2 red copper with ZAMAK3 zinc alloy intermediate layer.

[0020] Step 1. Spin friction welding of 1100 pure aluminum and ZAMAK3 zinc alloy intermediate layer.

[0021] 1100 pure aluminum 1 is a bar with a diameter of 20mm and a length of 90mm, and ZAMAK3 zinc alloy 2 is a bar with a diameter of 20mm and a length of 60mm. Fine grinding shall be carried out before welding. When welding, first clamp 1100 pure aluminum 1 to the fixed end of the friction welding machine, clamp ZAMAK3 zinc alloy 2 to the rotating end, set the welding parameters as follows: welding speed 1500rpm, welding pressure 60MPa, axial shortening 5mm, top The forging pressure is 100MPa, and the upsetting time is 6s. After welding, wire cutting is used to process the aluminum and zinc joints, retaining the zinc alloy layer 2 with a length of 5 mm, and grinding the zinc alloy end face.

[0022] Step 2. Rotary friction welding of 1100 pure...

Embodiment 2

[0025] Embodiment 2: Spin friction welding of 7050 aluminum alloy and T2 red copper with nickel intermediate layer.

[0026] Step 1. Welding of 7050 aluminum alloy and nickel metal.

[0027] The 7050 aluminum alloy 1 is a bar with a diameter of 20 mm and a length of 90 mm, and the nickel metal 2 is a bar with a diameter of 20 mm and a length of 60 mm. Fine grinding shall be carried out before welding. When welding, first clamp the 7050 aluminum alloy 1 to the fixed end of the friction welding machine, and clamp the nickel metal 2 to the rotating end of the friction welding machine, set the welding parameters as follows: welding speed 1200rpm, welding pressure 80MPa, axial shortening 5mm , upsetting pressure 110MPa, upsetting time 4s. After welding, wire cutting is used to process the joint, and the nickel metal 2 with a length of 5 mm is reserved, and the end face is ground.

[0028] Step 2. Rotary friction welding of 7050 aluminum alloy with intermediate layer and T2 red c...

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Abstract

The invention discloses an aluminum copper dissimilar metal rotation friction welding method added with a middle layer. The method is used for solving the technical problem of low joint intensity of the existing aluminum copper dissimilar metal rotation friction welding method, and has the technical scheme that firstly, aluminum metal and middle layer metal are subjected to rotation friction welding; then, the aluminum metal with the middle layer metal is subjected to rotation friction welding with copper metal; the middle layer metal uses metal with high solid solubility with the aluminum and copper; in the welding process, the middle layer metal is respectively diffused to the two sides of the aluminum and copper to form sosoloids. The aluminum and copper also diffuse to the middle layer, but the rotation friction welding time is short; the welding temperature is low; the diffusion substance concentration of the aluminum and copper towards the middle layer is low; a great number of intermetallic compounds cannot be sufficiently formed. A small number of intermetallic compounds formed by the diffusion of the aluminum and copper towards the middle layer can be extruded out in a flash mode; finally, no aluminum and copper intermetallic compounds are generated in the obtained aluminum copper dissimilar metal rotation friction welding joint; the joint intensity is improved.

Description

technical field [0001] The invention relates to a rotational friction welding method of aluminum-copper dissimilar metals, in particular to a rotational friction welding method of aluminum-copper dissimilar metals with an intermediate layer added. Background technique [0002] Aluminum and copper dissimilar joint structural parts have high electrical conductivity, thermal conductivity, corrosion resistance and good machining performance, so they have an irreplaceable position in the fields of electronic technology and chemical engineering. From the realization of structure and function and economic point of view, the connection of aluminum and copper dissimilar materials has great research value. The density of aluminum is only 1 / 3 of that of copper. The connection between aluminum and copper can significantly reduce the weight of the structure, play their respective advantages, and reduce production costs. However, the surface of aluminum is easily oxidized, and the formed...

Claims

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Application Information

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IPC IPC(8): B23K20/12B23K20/233B23K103/18
CPCB23K20/1225B23K20/2333B23K2103/18B23K20/12B23K20/16B23K2103/10B23K2103/12
Inventor 熊江涛李京龙王桂龙张赋升吕元召
Owner NORTHWESTERN POLYTECHNICAL UNIV
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