Aluminum alloy refiner and aluminum alloy produced with the refiner

A technology of aluminum alloy and refiner, which is applied in the field of special aluminum alloy, can solve the problems of difficult attenuation resistance, loss of refined grains, and low refinement ability, so as to improve subsequent processing performance, uniform distribution, and reduce Effect of small interface energy and mismatch degree

Inactive Publication Date: 2008-10-29
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the Al-Ti-B refiner has excellent grain refinement performance, its anti-attenuation performance is difficult to solve, TiB 2 Easy to aggregate and precipitate, and TiB 2 Susceptible to poisoning by Zr, Cr and other atoms and lose the effect of refining grains
In recent years, great progress has been made in the research and development of Al-Ti-C. Although the Al-Ti-C master alloy overcomes the poisoning effect of Zr, Cr and other atoms, its refinement ability is still lower than that of Al-Ti-B. master alloy, and exhibits significant attenuation

Method used

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  • Aluminum alloy refiner and aluminum alloy produced with the refiner
  • Aluminum alloy refiner and aluminum alloy produced with the refiner
  • Aluminum alloy refiner and aluminum alloy produced with the refiner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1: Alloy B-1 in the table was prepared. 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-Cu, Al-Cr, Al-Zr, and Al-Nb intermediate alloys 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 to 15 minutes, pour it into the iron mold, and demould after cooling. The as-cast metallographic microstructure diagram of the obtained aluminum alloy is shown in the attached Figure 11 .

Embodiment 2

[0038] Example 2: Prepare the alloy B-2 in the table. Add high-purity aluminum to the graphite clay crucible and melt it in a resistance crucible furnace at a melting temperature of 780°C. After the high-purity aluminum is melted, add Al-Cu, Al-Cr, Al-Zr, Al-Nb intermediate alloys, down to 760°C, add industrial pure Zn, melt and stir well, then add industrial pure Mg, remove surface slag, add 0.2% ~ 0.4% hexachloroethane (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. The as-cast metallographic microstructure diagram of the obtained aluminum alloy is shown in the attached Figure 12 .

Embodiment 3

[0039] Example 3: Alloy B-3 in the table was prepared. Add high-purity aluminum to the graphite clay crucible and melt it in a resistance crucible furnace at a melting temperature of 780°C. After the high-purity aluminum is melted, add Al-Cu, Al-Cr, Al-Zr, Al-Nb intermediate alloys, down to 760°C, add industrial pure Zn, melt and stir well, then add industrial pure Mg, remove surface slag, add 0.2% ~ 0.4% hexachloroethane (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. The as-cast metallographic microstructure diagram of the obtained aluminum alloy is shown in the attached Figure 13 .

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PUM

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Abstract

The invention discloses an aluminum alloy refiner and an aluminum alloy which is prepared by using the refiner. The aluminum alloy refiner is Zr-Cr-Nb, wherein, Zr, Cr, and Nb elements account for 0.2 to 0.5 percent of total mass percent of the alloy which is obtained from the preparation. By using the refiner, the aluminum alloy is prepared and obtained, the grains of which are small. When the refiner is used for preparing the aluminum alloy, the lattice type and the parameter of Al3Zr can be adjusted to form stable a L12 structure, the interfacial energy and the mispairing degree are reduced, the grain refining effect is increased, the fine uniform equiaxial cast structure is facilitated to be formed, and the subsequent processability of the aluminum alloy is increased. The adding technology of the refiner is simple, the price of the Zr, the Cr and the Nb is relatively cheap, and the aluminum alloy refiner and the aluminum alloy are applied to the industrialized production.

Description

technical field [0001] The invention relates to the preparation of metal alloys, in particular to the field of special aluminum alloys. Background technique [0002] Small and uniform equiaxed grains are the best as-cast structure of aluminum and aluminum alloy materials. To obtain this structure, the grains must be refined by different means, that is, the micronization of the crystal structure, including adding various intermediates in the liquid state. Alloy refiner or with the help of external energy, such as mechanical vibration, electromagnetic stirring, convection, ultrasonic treatment, etc. to refine the α-Al matrix. Thereby significantly improving the mechanical properties and processing performance of aluminum. Grain refinement can improve material strength and plasticity at the same time, and is an important way to obtain high-quality aluminum ingots and improve the quality of aluminum materials. The use of external energy requires special equipment and processes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/06C22C21/00C22C21/06C22C21/10C22C21/12
Inventor 陈康华张茁方华婵周年润
Owner CENT SOUTH UNIV
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