Refining agent for aluminum alloy containing high proportion of returned materials and its application method

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 purification effect of melt, etc., to improve yield, easy to use, degassing and degassing Excellent effect of cleaning slag

Active Publication Date: 2017-12-29
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 containing high proportion of returned materials and its application method
  • Refining agent for aluminum alloy containing high proportion of returned materials and its application method
  • Refining agent for aluminum alloy containing high proportion of returned materials and its application method

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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 alloys containing a high proportion of returned charge and a method for using the same. The refining agent includes general components and functional components, and the general components include chloride metal salts, fluorine metal salts, and fluoroaluminate Or one or two of fluorosilicates; functional components include the following components: niobium alloy, copper alloy, metal zinc, rare earth. After the refining agent of the present invention is added to the aluminum alloy melt containing a high proportion of recycled materials, it can fully diffuse from bottom to top without adsorption and agglomeration, quickly exerts the refining effect, and obtains a high-purity aluminum alloy melt. When it is used to refine aluminum alloy melt containing a high proportion of returned materials, the hydrogen content of the aluminum melt can be reduced to a level not exceeding 0.10ml / 100g Al, and the total oxygen content of the aluminum melt can be reduced to 80ppm. In addition to its excellent degassing and impurity removal effects, the refining agent can also significantly reduce the number and size of β‑Al5FeSi phase in the casting structure, eliminate the harmful effect of impurity iron in aluminum alloys, and thus improve the mechanical properties of cast aluminum alloy castings performance and yield.

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 Patents(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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