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Refining agent for aluminum alloy with high-content returns and method of using refining agent

A refining agent, aluminum alloy technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of deterioration of casting performance, poor melt purification effect, etc., to improve the yield, easy to use, and eliminate harmful effects. Effect

Active Publication Date: 2017-06-13
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the recycling of aluminum alloy castings, the traditional refining agent has poor purification effect on the aluminum alloy melt added with a high proportion of recycled materials, and a large number of large-sized needle-shaped harmful iron-rich phases are easily formed in the resulting casting structure, thereby deteriorating the casting. Performance problems, the present invention proposes a refining agent for aluminum alloy containing a high proportion of returned charge and its application method

Method used

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  • Refining agent for aluminum alloy with high-content returns and method of using refining agent
  • Refining agent for aluminum alloy with high-content returns and method of using refining agent
  • Refining agent for aluminum alloy with high-content returns and method of using refining agent

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preparation example Construction

[0060] Preparation of refining agent:

[0061] The step of preparing refining agent of the present invention has:

[0062] Step A, according to the target composition of refining agent, NaCl, Na 3 AlF 6 , Al-10Nb and Al 2 Mix Cu, stir evenly, put it into a melting furnace, heat up at a rate of 20°C / min, when the temperature rises to 800-820°C, keep it warm for 10 minutes, turn off the power, cool the mixture to room temperature, take it out and break it into 1-5mm granules to make a premix;

[0063] Step B, according to the target composition of refining agent, the premix that step A obtains is mixed with MnCl 2 , MgCl 2 , CaF 2 , Zn, RE and binder are mixed evenly, and pressed to a density greater than 3g / cm by using a hydraulic press under a pressure parameter of 20-30KN 3 And a round ingot with a mass of 0.25 kg is obtained to obtain a round ingot-shaped refining agent.

[0064] The target composition of described refining agent is:

[0065]

[0066] How to use ...

Embodiment 1

[0074] The preparation steps of embodiment 1 refining agent have:

[0075] Step A, according to the target composition of the refining agent, the weighed NaCl, Na 3 AlF 6 , Al10Nb and Al 2 Mix Cu, stir evenly, put it into a melting furnace, heat up at a rate of 20°C / min, when the temperature rises to 810°C, keep it warm for 10 minutes, turn off the power, cool the mixture to room temperature, take it out and break it into 1-5mm particles , to prepare the premix;

[0076] Step B, according to the target composition of refining agent, the premix that step A obtains is mixed with MnCl 2 , MgCl 2 , CaF 2 , Zn, RE (that is, La, Ce and Nd) and the binder are mixed evenly, and the YL41 hydraulic press is used to compress the density to 3.2g / cm2 under the pressure parameter of 25KN. 3 And a round ingot with a mass of 0.25 kg is obtained to obtain a round ingot-shaped refining agent.

[0077] The target composition of the refining agent of embodiment 1 is:

[0078]

[0079] ...

Embodiment 2

[0098] The preparation steps of embodiment 2 refining agent have:

[0099] Step A, according to the target composition of the refining agent, the weighed NaCl, Na 3 AlF 6 , Al10Nb and Al 2 Mix Cu, stir evenly, put it into a melting furnace, heat up at a rate of 20°C / min, when the temperature rises to 800°C, keep it warm for 10 minutes, turn off the power, cool the mixture to room temperature, take it out and break it into 1-5mm particles , to prepare the premix;

[0100] Step B, according to the target composition of refining agent, the premix that step A obtains is mixed with MnCl 2 , MgCl 2 , CaF 2 , Zn, RE (that is, La, Ce and Er) and the binder are mixed evenly, and the YL41 hydraulic press is used to compress the density to 3.1g / cm under the pressure parameter of 24KN. 3 And a round ingot with a mass of 0.25 kg is obtained to obtain a round ingot-shaped refining agent.

[0101] The target composition of the refining agent of embodiment 2 is:

[0102]

[0103] E...

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Abstract

The invention discloses a refining agent for aluminum alloy with high-content returns and a method of using the refining agent; the refining agent comprises universal components and functional components; the universal components include one or two of a chlorine metal salt, a fluorine metal salt, and a fluoaluminate or fluosilicate; the functional components include niobium alloy, copper alloy, metallic zinc, and rare earth. After being added to aluminum alloy melt with high-content returns, the refining agent is capable of diffusing sufficiently from bottom to top without adsorption and aggregation, the refining effect is given to play fast, and high-purity aluminum alloy melt is acquired. When applied to the refining of aluminum alloy melt with high-content returns, the refining agent is capable of lowering hydrogen content of the aluminum melt to not greater than the level of 0.10 ml per 100 g of Al, and total oxygen content of the aluminum melt is dropped to the level of 80 ppm. The refining agent has excellent degassing, cleaning and purifying effects, and is also capable of significantly lowering the magnitude and size of Beta-A15FeSi in casting structure and eliminating the harmful effect of the impurity iron in aluminum alloy, thereby increasing the mechanical properties and yield of cast aluminum alloy castings.

Description

technical field [0001] The invention relates to the smelting and processing technology of cast aluminum alloy, more particularly, refers to a refining agent for aluminum alloy containing a high proportion of recycled material and its application method. The refining agent can make the aluminum alloy return material be recycled as a resource. Background technique [0002] With the rapid development of the automobile industry, energy, environment and safety issues are becoming increasingly prominent, and the demand for aluminum alloys is increasing. The development and application of high-performance aluminum alloy parts to meet the needs of lightweight design is becoming more and more urgent. Cast aluminum alloy has become a widely used material for auto parts due to its excellent casting fluidity, physical properties, corrosion resistance and machinability. However, in the production process of aluminum alloy castings, due to the corrosion of raw materials to form "aluminum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C30/02C22C30/06C22C32/00C22C1/05C22C1/06C22C1/10C22B9/10C22C21/00
CPCC22B9/006C22B9/10C22C1/051C22C1/06C22C1/1036C22C21/00C22C30/00C22C30/02C22C30/06C22C32/00B22F1/10
Inventor 张花蕊陈焕良张虎
Owner BEIHANG UNIV
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