A New Type of High Scandium Aluminum Alloy Welding Wire

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...

AI Technical Summary

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 play to the role of Sc in Al-Mg welding wire and improve the performance of such welding wire to the greatest extent.