Novel high-scandium aluminum alloy welding wire

A technology of aluminum alloy welding wire and high scandium, which is applied in welding medium, welding equipment, metal processing equipment and other directions to achieve the effect of improving alloy strength, electrical conductivity and weld strength.

Active Publication Date: 2013-09-11
NORTHEASTERN UNIV +1
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  • Abstract
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Problems solved by technology

However, people have not yet developed Al-Mg-Sc welding wire with Sc as the main additive element, so as to give full

Method used

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Embodiment 1

[0012] The chemical composition of the new high scandium aluminum alloy welding wire of the present invention is calculated by mass percentage: magnesium Mg: 5.05, manganese Mn: 0.13, titanium Ti: 0.25, zinc Zn: 0.37, chromium Cr: 0.14, zirconium Zr: 0.30, scandium Sc: 1.41, iron Fe: 0.118, silicon Si: 0.147, copper Cu: 0.031, beryllium Be: 0.0003, other single impurity elements ≤ 0.1, other impurity elements total ≤ 0.15, and the balance is aluminum Al. The tensile strength of the high scandium aluminum alloy welding wire in this embodiment is 512 MPa, and the elongation is 17%.

[0013] The aluminum alloy welding wire prepared in this embodiment was used as a filler material, and a 10 mm thick 5083 O state plate was welded by MIG welding at room temperature. Metallographic observation shows that there is a fine equiaxed grain structure in the center of the weld and near the fusion zone, and Al3(Sc, Zr) composite particles are precipitated in the weld during cooling, which ar...

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Abstract

The invention relates to the field of welding materials, in particular to a novel high-scandium aluminum alloy welding wire. The novel high-scandium aluminum alloy welding wire chemically comprises, by mass, 4.5-6.0% of Mg, 0.10-0.20% of Mn, 0.20-0.30% of Ti, 0.30-0.50% of Zn, 0.10-0.20% of Cr, 0.25-0.35% of Zr, 1.20-1.60% of Sc, not more than 0.20% of Fe, not more than 0.20% of Si, not more than 0.05% of Cu, not more than 0.0005% of Be, not more than 0.1% of other single impurity elements, not more than 0.15% of other impurity elements and the balance Al. The novel high-scandium aluminum alloy welding wire has the advantages of uniformity in texture, tiny grains, good electrical conductivity, excellent welding performance, high weld strength, good ductility and toughness, excellent mechanical property, low hot-cracking susceptibility and excellent corrosion resistance.

Description

technical field [0001] The invention relates to the field of welding materials, in particular to a novel high scandium aluminum alloy welding wire. Background technique [0002] Al-Mg-Sc alloy is a new generation of structural materials for aerospace, nuclear energy and ships. It has the advantages of high strength, good corrosion resistance, good welding performance, and low sensitivity to welding hot cracks. There have been some studies on Al alloys containing Sc. In recent decades, a lot of research and development work has been carried out in the international materials industry, especially in the former Soviet Union, and Al-Mg-Sc alloys containing Sc such as 01575, 01571, 01570, 01545, 01535, 01523, and 01515 have been developed. In addition, Japan, the United States and my country have also carried out research work in recent years and made great progress. For example, in "The Effect of Sc on the Microstructure and Properties of Al-Mg Alloy" (Material Science and Tec...

Claims

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Application Information

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IPC IPC(8): B23K35/24
Inventor 顾惠敏顾江龙翟玉春王伟
Owner NORTHEASTERN UNIV
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