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Method for welding copper alloy and aluminum matrix composite

An aluminum-based composite material and copper alloy technology, applied in welding equipment, welding equipment, auxiliary welding equipment, etc., can solve the problems of metal burning and interface reaction, improve weld formation, increase welding temperature and holding time, weaken burn effect

Inactive Publication Date: 2014-11-12
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problems of severe metal burning and interface reaction caused by the traditional fusion welding technology of aluminum-based composite materials, and provides a method for welding copper alloy and aluminum-based composite materials

Method used

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  • Method for welding copper alloy and aluminum matrix composite
  • Method for welding copper alloy and aluminum matrix composite
  • Method for welding copper alloy and aluminum matrix composite

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Experimental program
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specific Embodiment approach 1

[0021] Embodiment 1: A method for welding copper alloys and aluminum-based composite materials in this embodiment is implemented in the following steps:

[0022] 1. Pretreatment of copper alloy and aluminum matrix composite to be welded;

[0023] 2. Put the copper alloy and the aluminum-based composite material into the welding fixture, adjust the relative position of the copper alloy and the aluminum-based composite material, and apply a contact pressure of 1 to 5 MPa on the contact surface; wherein, the copper alloy and the aluminum-based composite material The relative position of the copper alloy and the aluminum matrix composite material is that the wrong side of the butt joint surface is 0-0.2mm, and the gap between the butt joint surfaces is 0-0.1mm;

[0024] 3. Put the fixed copper alloy and aluminum matrix composite material into the vacuum chamber, and then evacuate to a vacuum degree of 5×10 -4 Pa~5×10 -2 Pa;

[0025] 4. Then use the upper defocus mode to hit the...

specific Embodiment approach 2

[0033] Embodiment 2: This embodiment differs from Embodiment 1 in that the pretreatment method in step 1 is to perform mechanical grinding and chemical cleaning on the butt joint surface of the copper alloy and the aluminum-based composite material to be welded and its vicinity. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0034] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the aluminum-based composite material described in step 1 is a particle-reinforced aluminum-based composite material consisting of two parts: a 2A12 aluminum matrix and a SiC ceramic particle-reinforced phase, wherein , wherein the composition of the 2A12 aluminum matrix is ​​Cu: 4.4%, Mg: 1.5%, Mn: 0.6%, impurity ≤ 0.15%, and the balance is Al. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention relates to an electron beam welding method for copper alloy and an aluminum matrix composite, which aims at solving the problems of serious metal loss, interfacial reaction and the like caused by the conventional fusion welding technology of the aluminum matrix composite. The method comprises the following steps of: carrying out pretreatment on two base materials to be welded; extruding the two base materials in a welding clamp by pressure; vacuumizing the base materials; welding the base materials for the first time in a defocusing mode; welding the base materials for the second time; and cooling the base materials in vacuum so as to implement the method for welding the copper alloy and the aluminum matrix composite. The method belongs to the field of pressurized auxiliary electron beam diffusion welding.

Description

technical field [0001] The invention relates to an electron beam welding method for a copper alloy and an aluminum-based composite material, and belongs to the field of pressure-assisted electron beam diffusion welding. Background technique [0002] Copper alloy is cheap, has high strength, electrical conductivity and thermal conductivity, excellent processing performance, brazing and corrosion resistance, and its performance can be controlled in a wide range through alloying, which can better meet the needs of the electrical and electronic industries. It has become an important material in this field, and its application in the latest technology field of semiconductor integrated circuits has created a new situation. Aluminum-based composite materials, especially SiC-reinforced aluminum-based composite materials, have very important application values ​​in the electrical and electronic fields due to their small thermal expansion coefficient, low density, and good thermal con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K15/06B23K37/04B23K103/18
Inventor 张秉刚陈国庆王廷冯吉才甄公博
Owner HARBIN INST OF TECH
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