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Method for welding foamed aluminium and aluminium alloy using solder capable of foaming

A foamed aluminum alloy and aluminum alloy technology, applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve problems such as difficult connections, achieve the effects of shortening time, simplifying process steps, and reducing costs

Inactive Publication Date: 2010-01-27
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to complete the connection of foam metal characterized by pores by conventional welding methods, so a new process must be developed for welding

Method used

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  • Method for welding foamed aluminium and aluminium alloy using solder capable of foaming
  • Method for welding foamed aluminium and aluminium alloy using solder capable of foaming
  • Method for welding foamed aluminium and aluminium alloy using solder capable of foaming

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1 A kind of welding of foamed pure aluminum

[0037] The first step: Mix 0.2% calcium and 1% titanium hydride powder equivalent to the weight of aluminum-silicon alloy and stir evenly to make a mixed viscosity-increasing foaming agent, heat the aluminum alloy until it is completely melted, and then mix the mixed viscosity-increasing foaming agent The foaming agent is added to the aluminum-silicon alloy melt at 670°C, and the viscosity is increased and foamed at 600rpm by the stirring blade for 6 minutes, and the undecomposed titanium hydride powder is evenly distributed in the melt, and it is water-cooled, and cooled to room temperature within 40s To obtain a foamable solder with a porosity of 35-70% and a mass fraction of undecomposed titanium hydride of 0.1%.

[0038] The second step: use wire cutting to process the foamed aluminum with a porosity of 67.8% and a pore diameter of 2.1mm to produce two round rods of foamed aluminum with a diameter of 6cm. Conce...

Embodiment 2

[0043] Embodiment 2 A kind of welding of aluminum-silicon foam alloy

[0044] The first step: mix 9% calcium and 6% titanium hydride powder equivalent to the weight of the aluminum-silicon alloy and stir evenly to make a mixed viscosity-increasing foaming agent, heat the aluminum alloy until it is completely melted, and then mix the mixed viscosity-increasing foaming agent The foaming agent is added to the aluminum-copper alloy melt at 720 ° C, and the viscosity is increased and foamed at 1200 rpm for 15 minutes by the stirring blade, and the undecomposed titanium hydride powder is evenly distributed in the melt, and it is water-cooled and cooled to room temperature within 40 seconds To obtain a foamable solder with a porosity of 35-70% and a mass fraction of undecomposed titanium hydride of 1%.

[0045] Step 2: Process two foamed aluminum-silicon alloy cuboids with a cross-section of 5×5cm from the foamed aluminum-silicon alloy with a porosity of 77.6% and a pore diameter of ...

Embodiment 3

[0050] Embodiment 3 Welding of a foamed aluminum-magnesium alloy plate

[0051] The first step: Mix 3.2% calcium and 3% titanium hydride powder equivalent to the weight of the aluminum-zinc alloy and stir evenly to make a mixed viscosity-increasing foaming agent, heat the aluminum alloy until it is completely melted, and then mix the mixed viscosity-increasing foaming agent The foaming agent is added to the aluminum-silicon alloy melt at 700 °C, and the viscosity is increased and foamed at 1000 rpm for 10 minutes by the stirring blade, and the undecomposed titanium hydride powder is evenly distributed in the melt, and it is water-cooled and cooled to room temperature within 40 seconds To obtain a foamable solder with a porosity of 35-70% and a mass fraction of undecomposed titanium hydride of 0.6%.

[0052] Step 2: Use wire cutting to process two foamed aluminum-magnesium alloy plates with a cross-section of 3×20cm from the foamed aluminum-magnesium alloy with a porosity of 80...

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Abstract

The invention discloses a welding method for welding foamed aluminium and aluminium alloy by using foaming solder, which belongs to the welding field of foamed metal. The steps are that 1. spherical pore foamed aluminium alloy blank is prepared as foaming welding solder by the melt foaming process; 2. the foamed aluminium and the aluminium alloy to be weld are selected and manufactured into the material with suitable size, then purified and dried; 3 a steel sealed mould is designed according to the outline dimension of the foamed aluminium and the aluminium alloy to be weld; 4. the solder with the thickness of 3 to 10mm is cut, as well as put and fixed in the solder together with the foamed aluminium and aluminium alloy joint into the sealed mould, and 0.5 to 4 Mpa of pressure is applied on both ends; 5. the solder in the foaming solder layer between the foamed aluminium and the aluminium alloy in the sealed mould is heated, and the second foaming procedure is started, the solder and base metal are infiltrated and diffused, and connected with each other by occlusal holes; 6. the steel mould is demolished and the overflow foaming solder is cleaned, and a welded framing member of the foamed aluminium and the aluminium alloy is obtained.

Description

technical field [0001] The invention relates to the welding field of foamed aluminum and aluminum alloys, in particular to a method for welding foamed aluminum and aluminum alloys by using a foamable solder. Background technique [0002] Aluminum foam is a new type of ultra-light porous metal with aluminum or aluminum alloy as the matrix and contains a large number of pores. The structure (pore size, porosity, matrix alloy) is adjustable, and the porosity of closed-cell aluminum foam can range from 50% to 95%. Variations over a wide range. , has outstanding properties such as light weight ρ<1, high specific strength, high damping and high energy absorption, and also has various characteristics such as sound insulation, heat insulation, flame retardancy, damping, impact energy absorption and electromagnetic shielding, realizing the structure The material is lightweight and multifunctional, so it has a wide range of application prospects. Especially in high-tech fields su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K1/00B23K1/19B23K1/20B23K103/10
Inventor 何德坪褚旭明何思渊王辉
Owner SOUTHEAST UNIV
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