High-elongation aluminum alloy section bar and making method thereof

Abstract

The invention discloses a high-elongation aluminum alloy section bar and a making method thereof. The high-elongation aluminum alloy section bar comprises, by mass, 0.15-0.35% of Si, 0.04-0.08% of Cu, 1.8-2.6% of Mg, 0.10% or less of Zn, 0.5-0.9% of Mn, 0.45-0.65% of Li, 0.1-0.3% of Cr, 0.25% or less of Fe, 0.05% or less of Ti, 0.15-0.25% of Ta, 0.1-0.2% of Be, 0.03-0.06% of Y, 0.02-0.04% of Lu, and the balance Al. The aluminum alloy section bar has a high elongation reaching above 15%, also has a high tensile strength and a high yield strength, and completely meets performance demands of bridges, thin walls and complex section industrial section bars.

Description

technical field [0001] The invention relates to a high-elongation aluminum alloy profile and a preparation method thereof, belonging to the field of aluminum alloy materials. Background technique [0002] Aluminum alloy has low density, but relatively high strength, close to or exceeding high-quality steel, good plasticity, easy to process, can be made into various profiles, and has excellent mechanical properties, physical properties and corrosion resistance. Aluminum alloy profiles are widely used in aerospace, transportation, machinery manufacturing, building decoration, chemical industry, etc., and are an important non-ferrous metal structural material. With the rapid development of science and technology and industrial economy, the requirements for the elongation of aluminum alloys such as bridges, thin walls, and complex sections are increasing. However, the elongation rate of aluminum alloy profiles on the existing market is generally only about 10%, which is increa...

AI Technical Summary

Problems solved by technology

However, the elongation rate of aluminum alloy profiles in the existing market is generally only about 10%, which is increasingly unable to meet the needs of special industries.