一种高强高吸能性6XXX系铝合金及其制备方法

By adding Mn, Zr and other transition metals or rare earth elements to 6XXX series aluminum alloys and using short-time high-temperature or non-isothermal aging processes, the problem of balancing toughness and energy absorption properties in high-strength aluminum alloys has been solved, and the preparation of aluminum alloys with high strength and high energy absorption properties has been achieved, which is suitable for automotive parts.

CN121575276BActive Publication Date: 2026-07-17SUZHOU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SUZHOU UNIV
Filing Date
2025-10-09
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing 6XXX series aluminum alloys struggle to maintain good toughness and energy absorption properties while improving strength. In particular, energy absorption properties often decline under high strength conditions, and the addition of transition metals or rare earth elements can lead to uneven distribution of dispersed phases and the formation of coarse primary phases.

Method used

By adding appropriate amounts of Mn, Zr, and other transition metals or rare earth elements, such as Cr, Sc, V, Ni, Hf, and Y, to 6XXX series aluminum alloys, a uniform nanoscale dispersed phase is formed. Short-time high-temperature aging or non-isothermal aging processes are then used to refine the microstructure, inhibit recrystallization, and improve the toughness and energy absorption properties of the alloy.

Benefits of technology

A balance between high strength and high energy absorption is achieved, with the alloy's yield strength reaching 290-450 MPa and a maximum bending angle of 70-150°, significantly improving the alloy's toughness, plasticity, and energy absorption properties, making it suitable for automotive parts such as anti-collision beams, bumpers, and battery frames.

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Abstract

本发明公开了一种高强高吸能性6XXX系铝合金及其制备方法，所述铝合金以质量百分比计包括如下组分：Si：0.7%‑1.4%；Mg：0.6%‑1.2%；Cu：0%‑0.9%；Fe≤0.25%；Ti：0.02%‑0.06%；Zr：0‑0.28%；M含量≤1%，其中M为Mn、Cr、V、Ni、Hf、Sc、Y中的一种或一种以上的组合；余量为Al及不可避免的杂质元素。本发明方法制备的6XXX系铝合金的粗晶层宽度小于150μm；平均晶粒尺寸小于10μm；短时高温时效或非等温时效后合金的屈服强度为290‑450MPa，最大折弯角度为70‑150°，可应用在汽车防撞梁、保险杠、吸能盒、电池边框等零部件上。
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Citation Information

Patent Citations

  • 6-series aluminum alloy profile with good bending property and preparation method thereof

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  • Method for preparing 6xxx aluminum alloy with high strength and high anodizing effect for electronic products

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