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Anti-recrystallizating Al-Zn-Mg (Cu) Alloy

A recrystallization and alloying technology, applied in the field of metal alloys, can solve problems such as difficult application and cost increase, and achieve the effect of improving structural stability

Inactive Publication Date: 2007-07-18
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Al 3 Sc and Al 3 Al formed by mutual solid solution of Zr 3 (Zr, Sc) compounds, because the lattice parameters are closer to the aluminum matrix, and the lattice stability is improved, the effect of inhibiting recrystallization is better than that of Al alone 3 Zr and Al 3 Sc, but it also increases the cost due to the expensive Sc, which is difficult to apply in practice

Method used

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  • Anti-recrystallizating Al-Zn-Mg (Cu) Alloy
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  • Anti-recrystallizating Al-Zn-Mg (Cu) Alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: Al-4.4%Zn-2.4%Mg-0.13%Zr-0.35%Er (wt%) was prepared by ingot metallurgy (alloy A-3# in Table 1). The raw materials used are high-purity aluminum (purity 99.99%), industrial pure Mg (purity 99.9%), industrial pure Zn (purity 99.9%), Al-Cu master alloy, Al-Zr master alloy, Al-Er master alloy . First, high-purity aluminum is added to the graphite clay crucible, and melted in a resistance crucible furnace at a melting temperature of 780°C. After the high-purity aluminum is melted, Al-Er master alloy, Al-Cu master alloy, and Al-Zr master alloy are added to reduce the temperature. to 760°C, add industrial pure Zn, melt and stir well, then add industrial pure Mg, remove surface slag, add 0.2% to 0.4% hexachloroethane (C 2 Cl 6 ) refining agent deslagging and degassing, let it stand for 10-15 minutes, pour it into an iron mold, and release the alloy after cooling.

Embodiment 2

[0026]Example 2: Al-8.6%Zn-2.5%Mg-2.2%Cu-0.16%Zr-0.4%Er (wt%) was prepared by ingot metallurgy (alloy B-3# in Table 1). The raw materials used are: high-purity aluminum (99.99wt%), Al-Zr master alloy, Al-Cu master alloy, Al-Er master alloy, industrial pure zinc and industrial pure magnesium. Dry all tools before smelting. Alloy smelting is carried out in a crucible furnace. First, aluminum is melted at 780°C. After the aluminum is melted, Al-Zr, Al-Er, and Al-Cu intermediate alloys are added. After melting, slag is removed, and zinc and magnesium are added at 740°C. After melting, add 0.2%~0.4% hexachloroethane (C 2 Cl 6 ) refining agent, deslagging and degassing, and then stand still for 10 to 15 minutes, pour into graphite mold to cool, and then release the alloy to obtain the alloy.

Embodiment 3

[0027] Example 3: Al-8.6%Zn-2.5%Mg-2.2%Cu-0.16%Zr-0.2%Cr (wt%) was prepared by ingot metallurgy (alloy B-4# in Table 1). The raw materials used are: high-purity aluminum (99.99wt%), Al-Zr master alloy, Al-Cu master alloy, Al-Cr master alloy, industrial pure zinc and industrial pure magnesium. Dry all tools before smelting. Alloy smelting is carried out in a crucible furnace. First, aluminum is melted at 780°C. After the aluminum is melted, Al-Zr, Al-Cr, and Al-Cu intermediate alloys are added. After melting, slag is removed, and zinc and magnesium are added at 740°C. After melting, add 0.2%~0.4% hexachloroethane (C 2 Cl 6 ) refining agent, deslagging and degassing, and then stand still for 10 to 15 minutes, pour into graphite mold to cool, and then release the alloy to obtain the alloy.

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Abstract

The recrystallization resisting Al-Zn-Mg-(Cu) alloy has RE element with atom radius larger than that of Zr or RE element with atom radius larger than that of Zr and transition element with atom radius smaller than that of Zr added during adding Zr, so as to form multicomponent intermetallic compound to inhibit the recrystallization of Al-Zn-Mg-(Cu) alloy obviously.

Description

technical field [0001] The invention relates to an anti-recrystallization Al-Zn-Mg-(Cu) alloy and belongs to the field of metal alloys. Background technique [0002] al 3 Sc to Ll 2 Type aluminide, belonging to the Pm3m space group, the lattice type and parameters are close to the aluminum matrix, and it is in a coherent state in the aluminum matrix. It is currently the most effective intermetallic compound for inhibiting the recrystallization of aluminum alloys. But Sc is expensive, adding Sc to aluminum alloy will greatly increase the production cost. al 3 Metastable state of Zr and Al 3 Sc is the same as Ll 2 Type aluminide, belonging to the Pm3m space group, the lattice type and parameters are close to the aluminum matrix, and it is in a coherent state in the aluminum matrix, which is second only to Al in inhibiting recrystallization effect. 3 Sc aluminide. al 3 Sc and Al 3 Al formed by mutual solid solution of Zr 3 (Zr, Sc) compounds, because the lattice param...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00
Inventor 陈康华黄兰萍方华婵张茁
Owner CENT SOUTH UNIV
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