Medium-strength 7xxx series recycled aluminum alloy parts with high recycled material ratio and their preparation method
A method for preparing medium-strength 7xxx series aluminum alloys with a high recycled material ratio using 5xxx and 6xxx series alloys, combined with purification and refining, achieves mechanical properties comparable to conventional alloys, addressing the challenge of low recycling penetration and dispersed applications.
Patent Information
- Application Number
- TW114102840
- Authority / Receiving Office
- TW · TW
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2026-08-01
- Estimated Expiration
- 2045-01-21
AI Technical Summary
The challenge of increasing the proportion of recycled materials in medium-strength 7xxx series aluminum alloys is hindered by limited recycling sources and the difficulty in obtaining recycled materials with similar alloy compositions, leading to a low recycled material ratio in these alloys.
A method involving raw material selection, purification and refining, melting, and alloy composition conditioning is employed, using recycled 5xxx and 6xxx series aluminum alloys, with purification processes to adjust alloying element content, and adding virgin pure aluminum ingots to achieve a high-recycled-material-ratio medium-strength 7xxx series aluminum alloy.
The method results in a medium-strength 7xxx series aluminum alloy with at least 75 wt% recycled material, maintaining mechanical properties comparable to conventional alloys, while overcoming the limitations of low recycling penetration and dispersed applications.