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HIGH-PERFORMANCE Al-Zn-Mg-Zr BASE ALUMINUM ALLOYS FOR WELDING AND ADDITIVE MANUFACTURING

An aluminum alloy, alloy technology, applied in welding/cutting medium/material, welding medium, additive processing, etc., can solve problems such as restricted use

Pending Publication Date: 2021-04-02
NANOAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, those skilled in the art generally agree that 7000 series aluminum alloys are nearly impossible to weld, which limits their use in many applications

Method used

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  • HIGH-PERFORMANCE Al-Zn-Mg-Zr BASE ALUMINUM ALLOYS FOR WELDING AND ADDITIVE MANUFACTURING
  • HIGH-PERFORMANCE Al-Zn-Mg-Zr BASE ALUMINUM ALLOYS FOR WELDING AND ADDITIVE MANUFACTURING
  • HIGH-PERFORMANCE Al-Zn-Mg-Zr BASE ALUMINUM ALLOYS FOR WELDING AND ADDITIVE MANUFACTURING

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0153]The chemical composition and physical properties of the example alloy 1 (excluding ZR) and a new alloy containing Zr were compared in Table 2. Both alloys are fushed, followed by hot pressing into a blank, and then extruded into profiles. Although the two compositions have similar hardness after fusion, the alloy exhibits a time-effect hardening reaction during the heat treatment, and the example alloy is not (Figure 5 ). Not subject to the constraints of any particular theory, I believe this is the role of forming Al-X precursor during the heat treatment. Both alloys respond to the second thermal efficiency, forming a conventional Zn during the second time.2Mg precipitates and the alloy maintains the same incremental growth in hardness compared to the example alloy.

[0154]The addition of Zr allows the alloy to achieve a higher maximum strength, and the thermal stability is improved by maintaining fine grains during high temperature heat treatment, such asimage 3 (Example alloy...

Embodiment 2

[0159]A conventional 7000 series aluminum alloy has been prepared by a reducing manufacturing process, i.e., selective laser melting (SLM). Due to heat pulling problems, these attempts have no success (install alloy 1) [see Sistiaga publication HRL]. To this end, some researchers are committed to developing custom 7000 series alloys customized for AM process. An example is an Al-Zn-mg alloy (instant alloy 3) [ZHOU] added with a large amount of SC added.

[0160]Another solution is to blend the second powder of the aluminum alloy powder, which is used as a pregnancy agent (instance alloy 2) [HRL] of the fine crystal granuli nucleation during the solidification process. Although it is feasible, this method increases complexity and cost.

[0161]The alloy solves the heat pulling problem during the printing process without using expensive elements (such as 钪), and improves strength than other examples of 3D printing 7000 series aluminum.

[0162]Table 3 lists the performance of 7000 series alumi...

Embodiment 3

[0170]The 7000 series alloy can be prepared by a rapid solidification process and can be constructed by a conventional powder process. One such an alloy is a commercial production AA7034, which cuts the melt spinning with a fragment, and is formed into a blank by hot pressing, and extruded into a profile. In this example, a copper-free 7000 series alloy is made of a powder by a gas atomization (fast solidification process), and is formed into a blank by hot pressing, and is extruded into a profile (process 1). Also in this example, it is also a copper-free 7000 series alloy which is made of powder through gas atomization, and is directly squeezed into a molded material without the intermediate consolidation step (process 2).

[0171]Although mechanical properties are similar to commercially produced alloys, it is advantageous to eliminate copper in alloy chemistry, which improves weldability and corrosion resistance. The addition of zirconia is also advantageous for improved weldabilit...

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Abstract

Aluminum-zinc-magnesium-zirconium base alloys and aluminum-zinc-magnesium-copper-zirconium base alloys that exhibit ultra-high strength and superior weldability, and methods of fabricating them.

Description

[0001]Cross-reference[0002]The present application claims priority and interests of the United States Temporary Patent Application Serial No. 62 / 687, 418, which are submitted on June 20, 2018. The disclosure is incorporated herein by reference.Technical field[0003]The present application relates to a family of Al-Zn-Mg and Al-Zn-Mg-Cu alloy or 7000 series aluminum alloys, when passing (i) conventional manufacturing techniques (such as slab casting), (ii) powder metallurgy process, or (iii) When machining using a melting process, it is possible to prepare components having ultra-high intensity, improved thermal stability and solderability compared to other commercial 7000 series aluminum alloys.Background technique[0004]The 7000 series aluminum alloy is one of the highest strength alloys available. Due to this performance and other properties, they are usually used in automobiles, aircraft and aerospace industry. However, those skilled in the art generally believe that 7000 series al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/10C22F1/053B23K35/02B23K35/28B22F1/065
CPCC22C21/10C22C1/0416C22F1/053C23C4/08C23C4/18B23K35/288B23K35/0227B22F2003/248C23C4/06C23C4/129C23C4/134C23C24/08C23C24/087B33Y70/00B22F2999/00B33Y40/20B22F2007/068Y02P10/25B22F1/065B22F10/28B22F10/64B22F10/25C22C1/047B22F3/20B22F3/115B33Y10/00B33Y80/00B33Y40/10B22F2301/052C22C1/026
Inventor J·R·克罗托N·Q·沃J·P·多恩
Owner NANOAL
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