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

CN101941122BActive Publication Date: 2012-08-08AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2012-08-08

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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.
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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...

Examples

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] ...