Process of obtaining composite brazed seam with ultrasonic brazed aluminium-base composite material

An aluminum matrix composite material, ultrasonic brazing technology, applied in welding/cutting medium/material, welding/welding/cutting item, welding medium, etc., can solve the problem of no reinforcement at joints

Inactive Publication Date: 2007-12-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problem that the joints formed after welding do not have reinforcing phases in the existing methods of welding discont

Method used

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Experimental program
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specific Embodiment approach 1

[0004] Specific Embodiment 1: In this embodiment, the method for brazing aluminum alloys at low temperature to obtain welded joints with high-temperature serviceability is realized through the following steps: 1. The brazing material is made into thin slices of 50-500 μm or rods or wires with a diameter of 2000-5000 μm Put it into the weld gap or the gap port of the two parts to be welded; 2. Under the conditions of ultrasonic frequency of 20-100kHz, amplitude of 1-50μm, and brazing temperature of 380-450℃, perform ultrasonic brazing on the brazing part Weld for 0.1-60s, complete the preliminary brazing and form a welded joint at the weld; 3. Adjust the temperature of the welded joint to 450-550°C and keep it for 1-60 minutes, and then apply a pressure of 10-200N to the welded joint. While applying pressure to the welded joint, ultrasonic vibration is applied to the welded joint with an ultrasonic frequency of 20-100 kHz and an amplitude of 1-50 μm for 0.1-60 s, that is, the al...

specific Embodiment approach 2

[0006] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in step 1, the brazing filler metal is a Zn-Al alloy with a mass percentage of Zn of 50% to 99.99% or pure zinc. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0007] Specific embodiment three: the difference between this embodiment and specific embodiment one is that in step one, the solder is made into a thin sheet of 100-400 μm or a rod or wire with a diameter of 1000-4500 μm is put into the welding of two parts to be welded. slot gap or gap port. Other steps are the same as in the first embodiment.

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Abstract

The present invention relates to relates to welding method, and is especially ultrasonic brazing process of obtain composite brazed seam in aluminum-base composite material. The process includes the following steps: 1. filling brazing alloy; 2. primary brazing; and 3. ultrasonic vibration treatment to obtain composite brazed seam in aluminum-base composite material. The said brazing process can obtain brazed joint with greatly improved mechanical performance and heat expansion performance, low heat expansion coefficient, and high strength near that of the mother material.

Description

technical field [0001] The invention relates to a welding method. Background technique [0002] Aluminum matrix composites are one of the most promising materials among new materials. Due to its high specific strength, high specific modulus, high temperature resistance, corrosion resistance, wear resistance, good electrical and thermal conductivity, and small thermal expansion coefficient, it has broad application prospects in aviation, aerospace, shipbuilding, automobile manufacturing and other fields. Discontinuously reinforced aluminum matrix composites are characterized by simple manufacturing methods, isotropy, and secondary processing, and are considered to be a promising composite material. But when this composite material is processed into components and applied to real life and production, it involves connection problems. Existing methods for welding discontinuously reinforced aluminum matrix composites include fusion welding, diffusion welding, and brazing. Howe...

Claims

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Application Information

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IPC IPC(8): B23K1/06B23K35/14B23K35/28B23K103/10
Inventor 赵维巍闫久春许惠斌张洋李大成杨士勤
Owner HARBIN INST OF TECH
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