A multi-component compound refinement modification treatment method for Fe phase in high Fe Al-Si alloy

An aluminum-silicon alloy and multi-component composite technology is applied in the field of multi-component composite refinement and metamorphism treatment of Fe phase in high Fe aluminum-silicon alloy, which can solve the problems of high cost and pollution of primary aluminum, and achieves easy composition, improved performance and simple process. Effect

Active Publication Date: 2016-10-05
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the ADC12 alloy is basically smelted with scrap aluminum, and its Fe and Si contents are much higher than the limit standard
In industrial production, primary aluminum is usually added to dilute and reduce Fe content, which is costly and pollutes primary aluminum. Therefore, it is necessary to carry out research on the application of high-Fe cast aluminum alloys.

Method used

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  • A multi-component compound refinement modification treatment method for Fe phase in high Fe Al-Si alloy
  • A multi-component compound refinement modification treatment method for Fe phase in high Fe Al-Si alloy
  • A multi-component compound refinement modification treatment method for Fe phase in high Fe Al-Si alloy

Examples

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Effect test

Embodiment 1

[0050] Example 1 Al-11Si-2Cu-1Fe Alloy Composite Refining and Modification Treatment

[0051] First, determine the alloy composition of the high-Fe Al-Si alloy of this embodiment by ICP spectral analysis. The specific composition is shown in 1# in Table 1. The mass percentage of Fe in this alloy is 1.05%, which belongs to the high-iron ADC12 cast Al-Si alloy. Take the original sample, XRD data such as figure 1 Shown; metallographic structure as image 3 shown. In this embodiment, Al—Ti—C, 1.0 times Mn, and 0.08 times RE are added to the mass percent of Fe.

[0052] In the high-Fe aluminum-silicon alloy of the present embodiment, the multi-element composite refinement modification treatment method of Fe phase is specifically as follows:

[0053] (1) Weigh the mass of 1# alloy as A (g). The alloy is smelted in a well-type resistance furnace and a corundum crucible. Put the alloy into a corundum crucible, sprinkle the covering agent when it is preheated to 400°C, and wait fo...

Embodiment 2

[0057] Example 2 Al-11Si-2Cu-1Fe Alloy Composite Refining and Modification Treatment

[0058] First, the alloy composition of the high-iron aluminum-silicon alloy is determined by ICP spectral analysis. The specific composition is shown in Table 1, 1#. The mass percentage of Fe in this alloy is 1.05%, which belongs to the high-iron ADC12 cast aluminum-silicon alloy. original sample gold image 3 As shown, in this embodiment, Al—Ti—C, 0.2 times of Mn, and 0.01 times of RE are added in mass percentages of Fe.

[0059] In the high-Fe aluminum-silicon alloy of the present embodiment, the multi-element composite refinement modification treatment method of Fe phase is specifically as follows:

[0060] (1) Weigh the mass of 1# alloy as A (g). The alloy is smelted in a well-type resistance furnace and a corundum crucible. Put the alloy into a corundum crucible, sprinkle the covering agent when it is preheated to 400°C, and wait for the alloy to melt when the temperature rises to 70...

Embodiment 3

[0063] Example 3 Al-12Si-0.5Cu-1Fe Alloy Composite Refining and Modification Treatment

[0064] Firstly, the alloy composition of the high-iron aluminum-silicon alloy is determined by ICP spectral analysis. The specific composition is shown in Table 1, 2#. The mass percentage of Fe in this alloy is 0.95%, which belongs to the high-iron ADC12 cast aluminum-silicon alloy. Metallographic structure such as Figure 6 shown, with figure 1 In comparison, as the silicon content increases, the copper content decreases, and the long acicular iron phase changes less. In this embodiment, Al—Ti—C, 2.0 times of Mn, and 0.1 times of RE are added with a mass percentage of 1.0 times that of Fe.

[0065] In the high-Fe aluminum-silicon alloy of the present embodiment, the multi-element composite refinement modification treatment method of Fe phase is specifically as follows:

[0066] (1) Weigh the mass of 1# alloy as A (g). The alloy is smelted in a well-type resistance furnace and a corund...

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Abstract

The invention discloses a multi-component refining and modifying processing method of the Fe phase in a high-Fe silicon aluminum alloy. The method comprises steps of: (1) melting the high-Fe silicon aluminum alloy at 700-740 DEG C to obtain an aluminum alloy solution, with the weight percent of the Fe in the high-Fe silicon aluminum alloy being 0.8-2.0%; (2) pre-heating a multi-component refining and modifying agent at 150-250 DEG C, with the multi-component refining and modifying agent comprising Al-Ti-C, Mn and RE; and (3) adding the multi-component refining and modifying agent into the aluminum alloy solution, stirring fully until the reaction is finished, adding C2Cl6 to perform refining and to remove gas, allowing the mixture to stand for 10-15 min, deslagging, casting and forming. According to the method, refining processing and modifying processing of the Fe phase in the high-Fe silicon aluminum alloy are integrated, thus simplifying the melt processing technology. The method is simple. The refining and modifying agent is convenient to prepare and free of pollution and the adding amount is easy to control.

Description

technical field [0001] The invention relates to a modification treatment method for Fe phases in Al-Si series cast aluminum alloys, in particular to a multi-component compound refinement modification treatment method for Fe phases in high-Fe aluminum-silicon alloys. Background technique [0002] As a traditional metal alloy material, cast aluminum alloy is widely used in various fields such as automobiles, machinery, and aerospace. Aluminum-silicon alloy is the most used cast aluminum alloy, accounting for 85%-90% of the entire aluminum casting. For example, ADC12 is a cast aluminum-silicon alloy brand in Japan, which is equivalent to the die-cast alloy YL113 widely used in China, and belongs to the Al-Si-Cu alloy. Among them, ADC12 alloy requires Fe%<0.9%, and YL113 requires Fe%<1.3%. However, the ADC12 alloy is basically smelted with scrap aluminum, and its Fe and Si contents are much higher than the limit standard. In industrial production, primary aluminum is us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/04C22C1/03C22C1/06B22D27/20
Inventor 李文芳唐鹏杜军马胜红
Owner SOUTH CHINA UNIV OF TECH
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