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Copper-aluminum connecting piece face-face penetrating fusion welding technique and preparation method

A connector, copper-aluminum technology, which is applied in the surface-surface infiltration and welding process and preparation field of copper-aluminum connectors, can solve the problem of coarse grains of substrates, affecting the physical properties, mechanical properties and electrochemical and chemical indicators of substrates and bonding surfaces, The copper-aluminum joint surface cannot form a continuous and firm joint surface, etc., so as to achieve the effect of high mechanical strength and high density

Active Publication Date: 2017-04-26
ZHEJIANG KANGSHENG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the following problems in the prior art: the copper-aluminum joint surface cannot form a continuous solid joint surface, or due to the limitation of the processing principle, in order to form a liquid-phase molten amorphous structure, the base material is subjected to high-temperature treatment , resulting in coarse grains of the base material, seriously affecting the physical properties, mechanical properties, and electrochemical and chemical indicators of the base material and the joint surface, thereby providing a surface-to-surface infiltration welding process and preparation method for copper-aluminum connectors

Method used

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Embodiment Construction

[0029] The technical solutions of the present invention will be further specifically described below through the embodiments and in conjunction with the accompanying drawings.

[0030] In this embodiment, a copper-aluminum connector surface-surface infiltration welding process is used. On the joint surface of the lead-aluminum connector, its main microstructure is a solid solution structure formed during the physical preparation process, which is provided by low-temperature friction and ultra-high pressure. Energy, so that the solid-phase aluminum and solid-phase copper atoms or molecules deviate from the equilibrium position for long-distance migration, thereby forming a solid-phase connection surface with physical connection properties. The result is that the total amount of solid solution in the bonding surface is > 95% or the total amount of compound + oxide + mixture in the firmly bonding surface is ≤ 5%.

[0031] The ultra-high pressure applied to the joint surface of th...

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Abstract

The invention discloses a copper-aluminum connecting piece face-face penetrating fusion welding technique and a preparation method. The problems that in the prior art, firm joint surfaces of copper-aluminum joint surfaces cannot be continuously generated, or base material crystal grains become thick and big, so that the physical property, the mechanical property and the electrical and chemical index of base materials and the joint surfaces are influenced are solved. The copper-aluminum connecting piece face-face penetrating fusion welding technology is characterized in that the main microstructures of the copper-aluminum connecting piece joint surfaces are dissolved solid matter organizations generated in the physical preparing process in a connecting mode; after the base materials are preheated, energy is supplied through low-temperature friction and extra-high voltage, so that atoms or molecules of solid phase aluminum materials and solid phase copper materials deviate from the equilibrium position to conduct long-distance migration, and a solid phase connecting face with physical connecting characteristics is formed; the total quantity of the dissolved solid matter in the joint surfaces is more than 95%, or the total quantity of compounds, oxides and mixtures in the firm joint surfaces is equal to or less than 5%, so that the mechanical properties of original base materials are basically retained, and the original base materials have the characteristic that the physical properties are higher than the physical properties of parent materials of the base materials; and density and mechanical strength are higher than those of base materials.

Description

technical field [0001] The invention relates to the technical field of copper-aluminum connection, in particular to a surface-to-surface infiltration welding process and a preparation method of a copper-aluminum connection piece. Background technique [0002] Copper-aluminum welding is to join the copper material and the aluminum material into one body through the welding process. Because both copper and aluminum are easy-to-oxidize metals, the welding of copper and aluminum has always been an international welding problem. The existing welding methods are traditionally used to weld copper and aluminum by hanging tin and melting tin. This method is not ideal for forming and does not have high strength. Due to the low melting point of tin, it cannot be welded to workpieces under high temperature work, so This process is only suitable for use on small workpieces under low temperature conditions. There are fusion welding, friction welding, cold pressure welding, explosive wel...

Claims

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Application Information

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IPC IPC(8): B23K20/12B23K20/22B23K20/24
CPCB23K20/122B23K20/22B23K20/24B23K2103/18
Inventor 周景春占利华滕世政凌斌南蒙永云冯卫明
Owner ZHEJIANG KANGSHENG CO LTD
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