A Composite Treatment Method for Regenerated Deformed Aluminum Alloy Melt

A technology of deformed aluminum alloy and compound treatment, which is applied in the direction of improving process efficiency, etc., can solve the problems of reducing process yield, performance degradation, and complex composition, so as to reduce pores and oxide slag inclusions, reduce crack sources, and improve mechanical properties. performance effect

Active Publication Date: 2021-11-26
QINGYUAN ZHENGTONG METAL PROD CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After remelting and recycling, its composition is complex, which leads to a great tendency of thermal cracking in the casting production process, which reduces the yield of the process and significantly reduces the performance

Method used

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  • A Composite Treatment Method for Regenerated Deformed Aluminum Alloy Melt
  • A Composite Treatment Method for Regenerated Deformed Aluminum Alloy Melt
  • A Composite Treatment Method for Regenerated Deformed Aluminum Alloy Melt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Preparation of 6xxx series regenerated deformed aluminum alloy treated with Mg / Sr / C-containing refiner compound: Melt the 6xxx series recycled waste aluminum that has been preliminarily screened according to the method of comparative example 1, the initial basic composition is the same as that of comparative example 1, remove the floating slag and heat preservation for 20min. Add Mg ingot, Al-10Sr modifier and Al-5Ti-0.3B-0.2C refiner to the melt, keep the melt temperature at 720°C, stir evenly after melting, and keep it for 20 minutes; among them, Al-10Sr is modified The addition of the agent is 0.6% of the melt mass, the addition of the Al-5Ti-0.3B-0.2C refiner is 0.7% of the melt mass, and the mass percentage of Mg in the melt after the Mg ingot is added is adjusted to 1.2%. Then carry out refining and deslagging treatment on the melt according to the method of Comparative Example 1, and cast the melt after refining and deslagging treatment into ingots. Then the in...

Embodiment 2

[0057] Preparation of 6xxx series regenerated deformed aluminum alloys treated with Mg / Sr / C-containing refiner compound: the preparation method of Example 2 is similar to that of Example 1, the only difference is the Mg ingot, Al-10Sr modifier and Al The addition amount of -5Ti-0.3B-0.2C refiner is different. In Example 2, the addition amount of Al-10Sr modifier is 0.6% of the melt mass, the addition amount of Al-5Ti-0.3B-0.2C refiner is 0.3% of the melt mass, and the Mg ingot is added to melt The mass percentage of Mg in the body is adjusted to 1.0%.

[0058] The optical microstructure of the regenerated deformed aluminum alloy prepared in this example is similar to that of the regenerated deformed aluminum alloy prepared in Example 1, but the eutectic structure of this example is reduced, and the needle-like dendrites are broken. In the as-cast state, the hot tear sensitivity coefficient HTS of the alloy of this embodiment is 130, the tensile strength is 207.3MPa, the elong...

Embodiment 3

[0060] Preparation of 6xxx series regenerated deformed aluminum alloys treated with Mg / Sr / C-containing refiner composite treatment: the preparation method of Example 3 is similar to that of Example 1, the only difference lies in the Mg ingot, Al-10Sr modifier and Al The addition amount of -5Ti-0.3B-0.2C refiner is different. In Example 3, the addition of Al-10Sr modifier is 0.2% of the mass of the melt, the addition of Al-5Ti-0.3B-0.2C refiner is 0.5% of the mass of the melt, and the Mg ingot is added to melt The mass percentage of Mg in the body is adjusted to 1.2%.

[0061]The optical microstructure of the regenerated deformed aluminum alloy prepared in this example is similar to the microstructure of the regenerated deformed aluminum alloy prepared in Example 1, the grains are refined, and the eutectic structure is distributed in the grain boundary in the form of points or blocks around. In the as-cast state, the hot tear sensitivity coefficient HTS of the alloy of this e...

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Abstract

The invention discloses a compound treatment method for regenerated deformed aluminum alloy melt. The compound treatment method mainly uses Mg, Sr and C-containing refiner to carry out compound treatment on 6xxx series regenerated aluminum alloy melt, and changes the alloy second The phase shape and distribution make the phase transformation of needle-like impurities into Chinese characters, and the eutectic structure is evenly distributed, while refining the grains and changing the solidification mode of the alloy. After the compound treatment of the invention, the ingot thermal cracking sensitivity of the regenerated deformed aluminum alloy is significantly reduced, the reduction rate is as high as 32%, and the comprehensive mechanical properties are also significantly improved, the tensile strength is increased by up to 35%, and the hardness is increased by up to 45%.

Description

technical field [0001] The invention relates to the technical field of composite treatment of recycled deformed aluminum alloy melts, in particular to a composite treatment method capable of reducing thermal cracking sensitivity of 6xxx series recycled deformed aluminum alloy ingots and improving its comprehensive mechanical properties. Background technique [0002] Aluminum and aluminum alloys have the characteristics of small specific gravity, good electrical conductivity, good heat dissipation performance, high specific strength and easy processing. They have been used more and more in the fields of automobiles, transportation, and aviation, and have become an indispensable foundation for the national economy. sexual raw materials. On the one hand, the rapid development of the national economy has continuously increased the demand for aluminum products. On the other hand, a large number of aluminum materials reach the service life every year, resulting in the enrichment o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/03C22C1/06C22C21/00C22F1/04C22B7/00
CPCC22B7/001C22C1/026C22C1/03C22C1/06C22C21/00C22F1/04Y02P10/20
Inventor 何健松杜军史明波周炳坚何杏霖
Owner QINGYUAN ZHENGTONG METAL PROD CO LTD
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