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A kind of modification treatment method of aluminum alloy

A modification treatment, aluminum alloy technology, applied in the field of aluminum alloy, can solve the problems of unsatisfactory industrial application, limited refinement effect, expensive Sc, etc., and achieve the effect of fine grain, small dendrite spacing, and low cost

Active Publication Date: 2018-07-13
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the refinement effect of La, Ce, and Er is limited, and Sc is expensive, which cannot meet industrial applications.

Method used

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  • A kind of modification treatment method of aluminum alloy
  • A kind of modification treatment method of aluminum alloy
  • A kind of modification treatment method of aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Put the A356 aluminum alloy (Al-7Si-0.6Mg) in a graphite crucible that has been cleaned and preheated to 500 °C, and placed in a SG2-7.5-12 resistance furnace to heat up to 750 °C to melt, and the A356 aluminum alloy ( After Al-7Si-0.6Mg) is completely melted, when the temperature is 720° C. to 750° C., the Al-12Er master alloy is pressed in with a bell jar, so that the Er content reaches 0.20%. Use a graphite rod to stir evenly for 1 minute, keep warm for 4-6 minutes, so that the elements are evenly distributed, and when the temperature of the melt drops to 700 ° C ~ 720 ° C, use a bell jar to press 0.10% of the mass of hexacyanoethane into the melt for degassing and degassing Let the slag stand for 10 minutes, remove the slag, filter, and pour it into a metal mold preheated to 220°C to make a metallographic sample and observe the metallographic structure.

[0027] In the solidification structure of the A356 alloy (Al-7Si-0.6Mg) with 0.20% Er content in Example 1, the ...

Embodiment 2

[0031] Put the A356 aluminum alloy (Al-7Si-0.6Mg) in a graphite crucible that has been cleaned and preheated to 500 °C, and placed in a SG2-7.5-12 resistance furnace to heat up to 750 °C to melt, and the A356 aluminum alloy ( After Al-7Si-0.6Mg) is completely melted, when the temperature is 720°C-750°C, use a bell jar to press into the Al-12Er master alloy, so that the Er content reaches 0.40%. Use a graphite rod to stir evenly for 1 minute, keep warm for 4-6 minutes, so that the elements are evenly distributed, and when the temperature of the melt drops to 700 ° C ~ 720 ° C, use a bell jar to press 0.10% of the mass of hexacyanoethane into the melt for degassing and degassing Let the slag stand for 10 minutes, remove the slag, filter, and pour it into a metal mold preheated to 220°C to make a metallographic sample and observe the metallographic structure. In the solidification structure of A356 alloy (Al-7Si-0.6Mg) without adding refiner, the primary aluminum dendrites are th...

Embodiment 3

[0034] Put the A356 aluminum alloy (Al-7Si-0.6Mg) in a graphite crucible that has been cleaned and preheated to 500 °C, and placed in a SG2-7.5-12 resistance furnace to heat up to 750 °C to melt, and the A356 aluminum alloy ( After Al-7Si-0.6Mg) is completely melted, the Al-10Zr master alloy is pressed into the Al-10Zr master alloy with a bell jar at a temperature of 720° C. to 750° C., so that the Zr content reaches 0.10%. Use a graphite rod to stir evenly for 1 minute, keep warm for 4-6 minutes, so that the elements are evenly distributed, and when the temperature of the melt drops to 700 ° C ~ 720 ° C, use a bell jar to press 0.10% of the mass of hexacyanoethane into the melt for degassing and degassing Let the slag stand for 10 minutes, remove the slag, filter, and pour it into a metal mold preheated to 220°C to make a metallographic sample and observe the metallographic structure. In the solidification structure of A356 alloy (Al-7Si-0.6Mg) without adding refiner, the pri...

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Abstract

The invention belongs to the technical field of aluminum alloys, and relates to a modification treatment method for aluminum alloys. In the present invention, Al-10Zr and Al-12Er master alloys are used as modifying agents, and A356 aluminum alloy is used as the object of modification; 0.20% Zr and 0.40% Er are added, and the A356 aluminum alloy is significantly improved through processes such as batching, smelting, and modification treatment. The microstructure and performance of Al-10Zr master alloy and Al-12Er master alloy modified A356 aluminum alloy have a tensile strength of 225MPa and an elongation of 6.4%, which is higher than that of the unmodified A356 aluminum alloy. , elongation were increased by 52.8%, 36.2%.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloys, and relates to a modification treatment method for aluminum alloys. Background technique [0002] Cast Al-Si alloy has excellent casting performance and mechanical properties. Due to its good casting fluidity, high strength and good machining characteristics, Al-Si alloy has a wide range of applications in the fields of aerospace, shipbuilding and automobiles. application. With the further development of automobiles, aviation and other fields, the existing Al-Si alloy castings will be difficult to meet their development requirements. In order to broaden the application range of Al-Si alloys, fine and uniformly distributed etc. Axial primary aluminum phase, thereby improving the performance of Al-Si alloy. [0003] Rare earth elements can be selectively adsorbed on the growing grain interface, hindering the growth of grains, resulting in grain refinement and deterioration. The study fou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/04C22C1/03C22C1/06
CPCC22C1/026C22C1/03C22C1/06C22C21/04
Inventor 卢雅琳李晓燕王健周东帅李兴成朱福先徐文婷
Owner JIANGSU UNIV OF TECH
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