High-strength and high-toughness aluminum alloy ingot

Abstract

The invention discloses a high-strength and high-toughness ADC12-MR aluminum alloy ingot comprising the following chemical components in mass ratio: 1.5-3.5% of copper, 9.6-12.0% of silicon, less than or equal to 0.3% of magnesium, less than or equal to 1.0% of zinc, less than or equal to 0.5% of ferrum, less than or equal to 0.5% of manganum, less than or equal to 0.5% of nickel, less than or equal to 0.3% of stannum, less than or equal to 0.1% of lead and the balance of aluminum. The ADC12-MR aluminum alloy ingot disclosed by the invention contains 1.5-1.9% of copper, 10.5-12.0% of silicon and less than or equal to 0.4% of ferrum; the ranges of the copper and the silicon are effectively controlled, and the content of the ferrum is reduced, so that the a strengthening phase Al2Si is sufficiently composed of Al and Si alloy elements, the mechanical performance index of the aluminum alloy ingot is improved, and the alloy has the tensile strength of over 250MPa and the elongation of over 1.5%.

Description

technical field [0001] The invention relates to a high-strength and high-toughness aluminum alloy ingot, in particular to a high-strength and high-toughness Al-Si-Cu series ADC12-MR aluminum alloy ingot, which belongs to the technical field of recycled alloys. Background technique [0002] Recycled aluminum is an aluminum alloy or aluminum metal obtained by re-melting and refining waste aluminum and aluminum alloy materials or aluminum-containing waste materials. It is an important source of metal aluminum. Secondary aluminum comes mainly in the form of aluminum alloys. Recycled aluminum has the same properties as primary aluminum, and can be remelted, refined and purified with recycled aluminum ingots. After adjusting the chemical composition, it can be made into various cast aluminum alloys and deformed aluminum alloys, and then processed into aluminum castings or plastically processed aluminum materials. [0003] ADC12 is a Japanese aluminum alloy grade, also known as No...

AI Technical Summary

Problems solved by technology

[0004] The research found that the content of impurity Fe in the alloy is too high, so that the toughness and elongation of the aluminum alloy ingot are not high

High iron content will also increase the extrusion force, deteriorate the surface quality of the extruded material, and increase the anodic oxidation color difference, resulting in a dull and dull color of the material. In addition, Fe also reduces the plasticity and corrosion resistance of the alloy.