Al-Mg-Zn-Mn aluminum alloy welding wire and preparation method thereof

An al-mg-zn-mn, aluminum alloy welding wire technology, applied in the field of aluminum alloys, can solve the problems of unfavorable thermal deformation and cold deformation processing, affecting the arc stability in the welding process, and the spheroidization of excess crystal phase, so as to improve the finished product The effect of solving the low joint strength and strengthening the weld metal

Pending Publication Date: 2018-06-15
NORTHEASTERN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the homogenization process is the most energy-consuming and time-consuming link in the production process of high-quality welding wire except alloy melting. It is worth noting that the spheroidization and growth of excess crystal phases will also occur during the homogenization process, which is not conducive to subsequent Hot deformation and cold deformation processing will also affect arc stability during welding

Method used

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  • Al-Mg-Zn-Mn aluminum alloy welding wire and preparation method thereof

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Effect test

Embodiment 1

[0047] An Al-Mg-Zn-Mn aluminum alloy welding wire, which contains the following components and mass percentages: Zn: 2.99%, Mg: 5.45%, Mn: 0.98%, Ti≤0.15%, Cr≤0.15%, Fe≤ 0.25%, Si≤0.25%, the total amount of other impurity elements≤0.15%, the content of a single impurity element≤0.05%, and the balance is Al. The diameter of the Al-Mg-Zn-Mn aluminum alloy welding wire is 1.2mm.

[0048] A preparation method of Al-Mg-Zn-Mn aluminum alloy welding wire, comprising the following steps:

[0049] (1) Alloy smelting: use graphite clay crucible to smelt in a resistance furnace, first add industrial pure aluminum, and add industrial pure zinc when the aluminum is semi-melted; when Al+Zn is completely melted and the melt temperature reaches 750°C, add Al-Mn Master alloy, and add a small amount of covering agent, when the master alloy is completely melted, stir the melt, when the melt temperature reaches 730°C, add industrial pure magnesium, and fully stir; then slagging, degassing and ref...

Embodiment 2

[0075] An Al-Mg-Zn-Mn aluminum alloy welding wire, which contains the following components and mass percentages: Zn: 2.99%, Mg: 5.45%, Mn: 0.98%, Ti≤0.15%, Cr≤0.15%, Fe≤ 0.25%, Si≤0.25%, the total amount of other impurity elements≤0.15%, the content of a single impurity element≤0.05%, and the balance is Al. The diameter of the Al-Mg-Zn-Mn aluminum alloy welding wire is 1.2mm.

[0076] A preparation method of Al-Mg-Zn-Mn aluminum alloy welding wire, comprising the following steps:

[0077](1) Alloy smelting: smelting in a resistance furnace through a graphite clay crucible, first add industrial pure aluminum, and add industrial pure zinc when the aluminum is half-melted; when Al+Zn is completely melted, and the melt temperature reaches 755°C, add Al-Mn Master alloy, and add a small amount of covering agent, when the master alloy is completely melted, stir the melt, when the melt temperature reaches 725°C, add industrial pure magnesium, and fully stir; then slagging, degassing a...

Embodiment 3

[0087] An Al-Mg-Zn-Mn aluminum alloy welding wire, which contains the following components and mass percentages: Zn: 1.91%, Mg: 5.39%, Mn: 1.01%, Ti≤0.15%, Cr≤0.15%, Fe≤ 0.25%, Si≤0.25%, the total amount of other impurity elements≤0.15%, the content of a single impurity element≤0.05%, and the balance is Al. The diameter of the Al-Mg-Zn-Mn aluminum alloy welding wire is 1.2mm.

[0088] A preparation method of Al-Mg-Zn-Mn aluminum alloy welding wire, comprising the following steps:

[0089] (1) Alloy smelting: use graphite clay crucible to smelt in a resistance furnace, first add industrial pure aluminum, add industrial pure zinc when the aluminum is semi-melted, add Al-Mn when the melt temperature reaches 760°C when Al+Zn is completely melted Master alloy, and add a small amount of covering agent, when the master alloy is completely melted, stir the melt, when the melt temperature reaches 720°C, add industrial pure magnesium, and fully stir; then slagging, degassing and refinin...

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Abstract

Disclosed are an Al-Mg-Zn-Mn aluminum alloy welding wire and a preparation method thereof. The welding wire and the method belong to the technical field of aluminum alloys. The welding wire comprises,by mass, 0.5-3.0% of Zn, 4.5-5.5% of Mg, 0.4-1.0% of Mn, 0-0.15% of Ti, 0-0.15% of Cr, 0-0.25% of Fe, 0-0.25% of Si, 0-0.15% of the total amount of other impurity elements, 0-0.05% of single impurityelement and the balance Al. The preparation method comprises the steps of smelting, casting, preprocessing after heating to 200-400 DEG C and performing heat preserving for 2-6 hours, extruding afterperforming heat preserving under the temperature of 440-470 DEG C for 2-4 hours, rolling after heating to 480-550 DEG C and performing heat preserving for 2-4 hours, in-process annealing and bright-cold drawing. According to the method, high-temperature and long-duration uniform processing is not needed, energy is saved, processing procedures of welding wire are shortened, wire braking during drawing is reduced, yield of drawing is improved, production cost is reduced, and metal microstructure can be refined, so that weld metal has natural aging strengthening capability to improve the performance of weld joints.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloys, and in particular relates to an Al-Mg-Zn-Mn aluminum alloy welding wire and a preparation method thereof. Background technique [0002] Many aluminum alloy components are welded in practical applications, and the welded aluminum alloy structural parts are generally used directly without heat treatment. Can have high strength, plasticity and corrosion resistance. At present, the welding wire widely used in aluminum alloy welding is mainly 5356 aluminum alloy welding wire. There are problems that the weld metal has no natural aging ability, low strength, and a large difference in strength from the base material, which cannot meet the requirements for using aluminum alloy welded components. Therefore, in the field of modern aluminum alloy welding, there is an urgent need to develop new aluminum alloy welding wire components that can match the strength, plasticity and corrosion resistance o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/28B23K35/40
CPCB23K35/288B23K35/40
Inventor 田妮吉猛周轶然李崇何长树赵刚赵骧
Owner NORTHEASTERN UNIV
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