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Composite metamorphic agent and composite metamorphic method of regenerative cast aluminum alloy

A technology for casting aluminum alloy and composite modifier, which is applied in the composite modifier field of composite modifier and recycled cast aluminum alloy, and can solve problems such as uninvolved

Active Publication Date: 2019-03-08
GUANGDONG INST OF NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the above-mentioned three types of composite addition of modifiers mainly solve the refinement and modification of the two types of microstructures in Al-Si cast alloys, and have not yet involved the synergistic refinement of the three types of microstructures such as α-Al grains, eutectic silicon, and rich iron. Modifiers and methods of modification

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] This embodiment provides a composite modification method for recycled cast aluminum alloy, including:

[0043] S1: put the industrial waste aluminum into the melting furnace, and heat the charge to 650°C to melt the charge;

[0044] S2: After all the furnace materials are melted, transfer the recycled aluminum melt to the alloying furnace, raise the temperature of the melt to 760°C, and take samples to test the actual alloy composition of the melt;

[0045] S3: Adjust the main alloy composition of the recycled aluminum melt to meet the requirements of YL113, and according to the actual composition ratio of Fe and the content of Mn, wrap the Mn agent with aluminum foil and add it to the melt. The mass ratio of Mn / Fe is 0.6. Press it into the interior of the melt with a tool, and stir the melt after melting.

[0046] S4: Transfer the melt to the heat preservation refining furnace, adjust the melt temperature to 710°C, add Al-B, which has been preheated and wrapped in alu...

Embodiment 2

[0051] This embodiment provides a composite modification method for recycled cast aluminum alloy, including:

[0052] S1: Put the industrial scrap aluminum into the melting furnace, and heat the charge to 700°C to melt the charge;

[0053] S2: After all the furnace materials are melted, transfer the recycled aluminum melt to the alloying furnace, raise the temperature of the melt to 780°C, and take samples to test the actual alloy composition of the melt;

[0054] S3: Adjust the main alloy composition of the recycled aluminum melt to meet the requirements of YL113, and according to the actual composition ratio of Fe and the content of Mn, wrap the Mn agent with aluminum foil and add it to the melt. The mass ratio of Mn / Fe is 0.4, and titanium Press it into the interior of the melt with a tool, and stir the melt after melting.

[0055] S4: Transfer the melt to the heat preservation refining furnace, adjust the melt temperature to 700°C, add Al-B, which has been preheated and w...

Embodiment 3

[0060] This embodiment provides a composite modification method for recycled cast aluminum alloy, including:

[0061] S1: put industrial waste aluminum into the melting furnace, and heat the charge to 675°C to melt the charge;

[0062] S2: After all the furnace materials are melted, transfer the recycled aluminum melt to the alloying furnace, raise the temperature of the melt to 770°C, and take samples to test the actual alloy composition of the melt;

[0063] S3: Adjust the main alloy composition of the recycled aluminum melt to meet the requirements of YL113, and according to the actual composition ratio of Fe and the content of Mn, wrap the Mn agent with aluminum foil and add it to the melt. The mass ratio of Mn / Fe is 0.5, and use titanium Press it into the interior of the melt with a tool, and stir the melt after melting.

[0064] S4: Transfer the melt to the heat preservation refining furnace, adjust the temperature of the melt to 710°C, add Al-B, which has been preheate...

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Abstract

The invention discloses a composite metamorphic agent and a composite metamorphic method of a regenerative cast aluminum alloy, and relates to the technical field of metamorphism of cast aluminum alloys. The composite metamorphic agent is used for composite metamorphism of the regenerative cast aluminum alloy, and comprises a Mn agent, an Al-B intermediate alloy, and an Al-Sr intermediate alloy, wherein the Mn agent is an Al-Mn intermediate alloy or a Mn additive, and the appending proportion of the Mn agent is 30%-60% of the Fe content in the regenerative cast aluminum alloy; the additive amount of a B agent in the Al-B intermediate alloy is 0.01-0.05% of the melt mass of the regenerative cast aluminum alloy, and the additive amount of Sr in the Al-Sr intermediate alloy is 0.01-0.05% of the melt mass. According to the composite metamorphic agent, the purpose of synchronously refining three phases of alpha-Al, eutectic silicon, and an iron-rich phase can be achieved, thus the elongation of the alloy can be increased, and the composite metamorphic agent is especially suitable for composite metamorphism of a regenerative aluminum-silicon alloy with the high iron content.

Description

technical field [0001] The invention relates to the technical field of modification of cast aluminum alloys, and in particular to a composite modification agent and a method for composite modification of recycled cast aluminum alloys. Background technique [0002] Recycled aluminum is an aluminum alloy or aluminum metal obtained by re-melting and refining waste aluminum and aluminum alloy materials or aluminum-containing waste materials. It is an important source of metal aluminum. Compared with primary aluminum, the unit energy consumption of secondary aluminum is only 5% of that of primary aluminum, the emission of three wastes is greatly reduced, and the environmental and social benefits are remarkable. It has become one of the common methods to solve the shortage of aluminum resources at home and abroad. However, due to the imperfect classification system of waste aluminum in my country, and the proportion of low-grade waste abroad is more than 30%, the composition of re...

Claims

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Application Information

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IPC IPC(8): C22C21/04C22C1/03C22C1/06
CPCC22C1/026C22C1/03C22C1/06C22C21/04
Inventor 宋东福王顺成黄正华郑开宏张大童韩军锋周东明
Owner GUANGDONG INST OF NEW MATERIALS
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