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Welding wire matched with corrosion-resistant aluminum-magnesium-scandium alloy and preparation method thereof

A technology of alloy and welding wire, which is applied in the field of aluminum-magnesium-scandium alloy welding wire and its preparation. The alloy provides welding compatibility and other issues to achieve the effect of ensuring the control accuracy of chemical composition, high comprehensive mechanical properties of joints, and low hot cracking sensitivity

Active Publication Date: 2012-08-08
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The application of aluminum-magnesium-scandium alloys on large structural parts is inseparable from welding technology. Aluminum-magnesium-scandium alloys are basically developed on the basis of the original 5-series alloy 5A06, so ER5356, ER5556 and 5B06 aluminum-magnesium welding wires can be used for welding. Although a certain quality of joints can be obtained by welding similar welding wires, they cannot meet the design requirements in terms of crack resistance, stress corrosion resistance and comprehensive mechanical properties of the joints; -Sc welding wire is specially used for welding Al-Zn-Mg 7-series aluminum alloys (such as 7A52, 7005). The high Zn content (1%) of the welding wire will enhance the brittleness of joints for welding 5-series aluminum-magnesium-scandium alloys and crack sensitivity
[0004] Therefore, the existing welding wires cannot maximize the advantages of aluminum-magnesium-scandium alloys; it is urgent to develop high-strength aluminum welding wires with better thermal cracking and stress corrosion resistance, especially welding wires that can improve the overall performance of joints. In order to maximize the performance and scope of use of the new corrosion-resistant aluminum-magnesium-scandium alloy
[0005] Due to the high comprehensive performance of corrosion-resistant aluminum-magnesium-scandium alloys, its requirements for welding quality have also increased simultaneously, especially for joint mechanical properties and stress corrosion performance. The current aluminum-magnesium welding wire is not enough to support new corrosion-resistant aluminum alloys. The comprehensive performance advantages of magnesium-scandium alloy cannot provide good welding matching for the alloy, which affects the engineering application of the alloy. Therefore, the development of high-performance matching welding wire is very urgent.

Method used

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  • Welding wire matched with corrosion-resistant aluminum-magnesium-scandium alloy and preparation method thereof
  • Welding wire matched with corrosion-resistant aluminum-magnesium-scandium alloy and preparation method thereof
  • Welding wire matched with corrosion-resistant aluminum-magnesium-scandium alloy and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0030] A welding wire for corrosion-resistant aluminum-magnesium-scandium alloy. The aluminum ingot is refined by smelting process according to the following formula, and then extruded and drawn into φ2mm and φ3mm welding wire. The formula of the welding wire is as follows:

[0031] Mg, its weight percentage is 4.5%;

[0032]Zr, its percentage by weight is 0.16%;

[0033] Sc, its weight percentage is 0.16%;

[0034] Mn, its weight percentage is 0.25%;

[0035] Ti, its weight percentage is 0.08%;

[0036] Cr, its weight percentage is 0.17%;

[0037] Ce, its weight percentage is 0.02%;

[0038] Y, its weight percentage is 0.02%;

[0039] The balance is Al;

[0040] The preparation of the above-mentioned corrosion-resistant aluminum-magnesium-scandium alloy matching welding wire can specifically adopt the following steps:

[0041] (1) Preparation of aluminum-based master alloy:

[0042] Al-10Mn alloy, wherein the weight percentage of Mn is 10%, and the balance is Al;

[...

Embodiment 2

[0060] A multi-element micro-alloyed scandium-containing aluminum-magnesium welding wire. According to the formula, aluminum ingots are refined by smelting process, and then extruded and drawn into φ2mm and φ3mm welding wires. The formula of the welding wire is as follows:

[0061] Mg, its weight percentage is 4.0%;

[0062] Zr, its percentage by weight is 0.13%;

[0063] Sc, its weight percentage is 0.14%;

[0064] Mn, its weight percentage is 0.28%;

[0065] Ti, its weight percentage is 0.07%;

[0066] Cr, its weight percentage is 0.16%;

[0067] Ce, its weight percentage is 0.02%;

[0068] Y, its weight percentage is 0.02%;

[0069] The balance is Al;

[0070] The preparation of the above-mentioned corrosion-resistant aluminum-magnesium-scandium alloy matching welding wire can specifically adopt the following steps:

[0071] (1) Preparation of aluminum-based master alloy:

[0072] Al-10Mn alloy, wherein the weight percentage of Mn is 10%, and the balance is Al;

[...

Embodiment 3

[0090] A multi-element micro-alloyed scandium-containing aluminum-magnesium welding wire. According to the formula, aluminum ingots are refined by smelting process, and then extruded and drawn into φ2mm and φ3mm welding wires. The formula of the welding wire is as follows:

[0091] Mg, its weight percentage is 4.0%;

[0092] Zr, its weight percentage is 0.14%;

[0093] Sc, its weight percentage is 0.14%;

[0094] Mn, its weight percentage is 0.3%;

[0095] Ti, its weight percentage is 0.09%;

[0096] Cr, its weight percentage is 0.15%;

[0097] Ce, its weight percentage is 0.02%;

[0098] Y, its weight percentage is 0.02%;

[0099] The balance is Al;

[0100] The preparation of the above-mentioned corrosion-resistant aluminum-magnesium-scandium alloy matching welding wire can specifically adopt the following steps:

[0101] (1) Preparation of aluminum-based master alloy:

[0102] Al-10Mn alloy, wherein the weight percentage of Mn is 10%, and the balance is Al;

[0103] ...

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Abstract

The invention provides a welding wire matched with a corrosion-resistant aluminum-magnesium-scandium alloy and a preparation method thereof. The welding wire comprises the following components: 3.0-5.0wt% of Mg, 0.1-0.2wt% of Zr, 0.1-0.2wt% of Sc, 0.2-0.3wt% of Mn, 0.05-0.15wt% of Ti, 0.05-0.25wt% of Cr, 0.01-0.05wt% of Ce, 0.01-0.05wt% of Y and the balance of Al. The preparation method of the welding wire matched with the corrosion-resistant aluminum-magnesium-scandium alloy comprises the following steps: (1) preparing an aluminum-based master alloy; (2) preparing alloy raw materials; (3) refining the alloy; (4) measuring hydrogen content; (5) ingot casting; and (6) extruding and drawing for molding. The invention meets the need for welding production of an aircraft fuel tank and a rocket tank, and welding seams can obtain higher comprehensive mechanical property of joints.

Description

technical field [0001] The invention relates to welding technology, in particular to a welding wire suitable for aluminum-magnesium-scandium alloy and a preparation method thereof. Background technique [0002] Corrosion-resistant aluminum-magnesium-scandium alloy has high specific strength, good plasticity and toughness, excellent corrosion resistance and welding performance. It is another reserve material for aerospace and aviation large-scale structural parts after Al-Li alloy. Corrosion-resistant aluminum-scandium alloy has high yield strength and tensile strength, and is the preferred material for aircraft fuel tanks and rocket storage tanks. In recent years, with the development of the aerospace industry, the application of corrosion-resistant aluminum-magnesium-scandium alloys has been put on the agenda. [0003] The application of aluminum-magnesium-scandium alloys on large structural parts is inseparable from welding technology. Aluminum-magnesium-scandium alloys a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/28B23K35/40
Inventor 雷学锋张凌云张志勇戴志锋
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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