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Praseodymium-containing anti-recrystallizing corrosion resistant aluminum alloy

An aluminum alloy and recrystallization technology, applied in the field of metal alloys, can solve the problems of difficult industrial aluminum alloy production and high price, and achieve the effect of cheap price and increased strength

Inactive Publication Date: 2008-12-17
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high price of Sc, the current market price is about 40,000 RMB / kg, so it is difficult to be practically used in the production of industrial aluminum alloys.

Method used

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  • Praseodymium-containing anti-recrystallizing corrosion resistant aluminum alloy
  • Praseodymium-containing anti-recrystallizing corrosion resistant aluminum alloy
  • Praseodymium-containing anti-recrystallizing corrosion resistant aluminum alloy

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Example 1: Alloy B-1 in the table was prepared. Add high-purity aluminum (purity 99.99%) into graphite clay crucible and melt it in a resistance crucible furnace at a melting temperature of 780°C. After melting high-purity aluminum, add Al-Cu, Al-Cr, Al-Zr, Al- Pr master alloy, lowered to 760°C, added industrial pure Zn (purity 99.9%), melted and stirred well, then added industrial pure Mg (purity 99.9%), after removing surface slag, added 0.2% ~ 0.4% of six Ethyl chloride (C 2 Cl 6) Refining agent deslagging and degassing, let it stand for 10 to 15 minutes, pour it into the iron mold, and demould after cooling.

Embodiment 2

[0038] Example 2: Prepare the alloy B-2 in the table. Add high-purity aluminum (purity 99.99%) into graphite clay crucible and melt it in a resistance crucible furnace at a melting temperature of 780°C. After melting high-purity aluminum, add Al-Cu, Al-Cr, Al-Zr, Al- Pr master alloy, lowered to 760°C, added industrial pure Zn (purity 99.9%), melted and stirred well, then added industrial pure Mg (purity 99.9%), after removing surface slag, added 0.2% ~ 0.4% of six Ethyl chloride (C 2 Cl 6 ) Refining agent deslagging and degassing, let it stand for 10 to 15 minutes, pour it into the iron mold, and demould after cooling.

Embodiment 3

[0039] Example 3: Alloy B-3 in the table was prepared. Add high-purity aluminum (purity 99.99%) into graphite clay crucible and melt it in a resistance crucible furnace at a melting temperature of 780°C. After melting high-purity aluminum, add Al-Cu, Al-Cr, Al-Zr, Al- Pr master alloy, lowered to 760°C, added industrial pure Zn (purity 99.9%), melted and stirred well, then added industrial pure Mg (purity 99.9%), after removing surface slag, added 0.2% ~ 0.4% of six Ethyl chloride (C 2 Cl 6 ) Refining agent deslagging and degassing, let it stand for 10 to 15 minutes, pour it into the iron mold, and demould after cooling.

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PUM

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Abstract

The invention discloses a recrystallization resistant and anti-corrosion aluminum alloy which consists of main alloy element Al-Mg-(Zn-Cu) and Zr-Cr-Pr accounting for 0.1 to 1.3 percent of the alloy by mass percentage. By compounding and adding Zr, Cr and Pr to an Al-Mg-(Zn-Cu) alloy, the dispersed phase of a multi-element aluminide is formed, which can effectively restrain the recrystallization of the Al-Mg-(Zn-Cu) alloy, maintain deformation recovering tissues and promote the strength, cracking resistance and anti-stress-corrosion performance of the alloy; in addition, the prices of Zr, Cr and Pr are relatively cheap, thus being suitable for industrialized production.

Description

technical field [0001] The invention belongs to the field of metal alloys, in particular to anti-recrystallization and corrosion-resistant aluminum alloys. Background technique [0002] It is one of the ways to simultaneously improve the strength and corrosion resistance of aluminum alloys by forming micro-dispersed phases through multi-element microalloying, effectively inhibiting recrystallization and grain growth, and maintaining the deformation recovery structure. In the early stage, the non-coherent aluminide dispersed phase was formed by adding trace amounts of Cr and Mn. Later changed to add Zr to form metastable L1 2 Type Al 3 Zr dispersed phase, which improves the resistance to recrystallization and improves the stress corrosion resistance, but metastable L1 2 Type Al 3 Zr transforms into incoherent stable DO during long-term homogenization and solution treatment at high temperature 23 Type Al 3 Zr dispersed phase, therefore, the effect of inhibiting recrystal...

Claims

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Application Information

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IPC IPC(8): C22C21/00
Inventor 陈康华方华婵张茁祝昌军
Owner CENT SOUTH UNIV
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