A high-strength, high-toughness, impact-resistant, energy-absorbing al-mg-si alloy

Abstract

The invention belongs to the technical field of aluminum alloy materials, in particular to a high-strength, high-toughness, impact-resistant, energy-absorbing Al-Mg-Si alloy. The Al-Mg-Si alloy of the present invention comprises Mg0.40-1.00%, Si0.50-0.90%, Mn≤0.60%, Cr≤0.30%, Fe≤0.25%, Al 96.8-99.1% in mass percentage, wherein, Si free =Si‑0.3×(Mn+Fe+Cr), Mg / Si free The mass ratio is 0.72‑1.40, and Mg+2Si free The mass percentage is 1.40% to 2.40%. The aluminum alloy provided by the invention not only has excellent conventional mechanical properties, but also has good bending toughness, and also has outstanding crushing and impact resistance energy absorption properties.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy materials, in particular to a high-strength, high-toughness, impact-resistant, energy-absorbing Al-Mg-Si alloy. Background technique [0002] With the continuous and rapid development of human economy and society, energy and environmental problems continue to emerge, and green, low-carbon, environmentally friendly and sustainable development has become the development direction of today's society. The fuel consumption of motor vehicles accounts for a considerable proportion of the total consumption of crude oil. The rapidly developing automobile industry not only poses a huge challenge to my country's oil supply, but also brings unprecedented pressure to the environment due to the emission of automobile exhaust. Energy saving and emission reduction is the key to the transformation and upgrading of the automobile industry, and lightweight is an important means to achieve energy saving and em...

AI Technical Summary

Problems solved by technology

Although the Chinese patent CN109504870B provides an aluminum alloy for lightweight automobile anti-collision beams, the synthesis reaction process and solidification process are regulated by direct melt reaction technology combined with ultrasonic magnetic coupling field technology, and a compound with uniform distribution of nanoparticles in situ is obtained. Materials, and then through hot extrusion forming and heat treatment, the preparation process is more complicated, difficult and costly, not suitable for wide application

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