Aluminum alloy bar with high strength and high tenacity and preparation technology thereof

Abstract

The invention provides an aluminum alloy profile with high strength and high tenacity and a preparation technology thereof, and relates to the technical field of metal material smelting. Setting the total weight of the aluminum alloy profile as the base, an aluminum alloy bar with the high strength and the high tenacity includes, by weight, 3.15-5.21% of Zn, 0.35-1.2% of Mn, 0.56-1.28% of Mg, 0.01-0.08% of Sb, 0.08-0.15% of Cu, 0.05-0.12% of Zr, 0.06-0.16% of V, 0.003-0.012% of rare earth elements, the balance Al and unavoidable impurities. The aluminum alloy profile with the high tenacity forms an aluminide dispersed phase in the system through aluminum and other metal, the synergistic effect is generated, the effects of refining casting grains and strengthening pin dislocation are achieved, so that the recrystallization temperature of the aluminum alloy profile is improved dramatically, recrystallization of the grains is reduced, the problem of quenching sensitivity is solved, and the strength, the fracture tenacity and the stress corrosion resistance of the aluminum alloy profile are improved.

Description

[0001] machine technology

[0002] The invention relates to the technical field of metal material smelting, in particular to a preparation process of high-strength and high-toughness aluminum alloy rods. Background technique

[0003] my country is already the world's largest producer, exporter and consumer of aluminum extrusions. At present, my country's aluminum extrusion industry has entered a new stage of scale and technological upgrading, and is in an important period of change and transformation. Now the aluminum alloy industry has been developing in the direction of producing environmentally friendly, low energy consumption, and excellent alloy properties.

[0004] Continuous extrusion is an important process for the production of aluminum alloy profiles. Continuous extrusion rods do not require preheating, but require good toughness, shape and formability for the billet. The aluminum alloys formed by continuous extrusion mainly include: 1 series, 3 series and 6 series...