Cast aluminum alloy capable of being anodized and preparation method thereof

A technology of casting aluminum alloy and anodizing, applied in the field of casting aluminum alloy and its preparation, and aluminum alloy, can solve the problems of poor color and luster, inability to guarantee the effect, low film thickness, etc., and achieve high strength, formability, and oxidation effect. Better, even color results

Inactive Publication Date: 2016-03-23
SUZHOU SANJI FOUNDRY EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the above two improved methods for improving the anodizing treatment of aluminum alloys are relatively cumbersome and the effect cannot be guaranteed.
Due to the hig...

Method used

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  • Cast aluminum alloy capable of being anodized and preparation method thereof
  • Cast aluminum alloy capable of being anodized and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Si: 8kg, Mg: 8kg, Mn: 1kg, Al: 983kg are put into the melting furnace for melting, and the melting temperature is 700~730℃;

[0039] Degassing and refining: adjust the smelting temperature to 700-720°C, add hexachloroethane for degassing and refining, the addition amount is 0.4%, stir evenly for 10 minutes, and then purify and remove slag;

[0040] Modification and secondary refining: adjust the melting temperature to 730-740 °C, add Al-Sr modification agent for modification treatment, after adding for 30 minutes, adjust the melting temperature to 700-710 °C, add degassing refining agent, the addition amount is 0.1%, and stir evenly for 10 min , then remove the slag and prepare for pouring;

[0041] Pouring and casting: adjust the alloy temperature at 680-720°C, and the mold temperature at 180-250°C.

[0042] The mechanical properties of the obtained alloy are: the tensile strength is 300MPa, the elongation is 10%, and the yield strength is 210MPa.

Embodiment 2

[0044] Si: 20kg, Mg: 30kg, Mn: 8kg, Fe: 3kg, Cu: 3kg, Zn: 3kg, Al: 933kg are put into the melting furnace for melting, and the melting temperature is 700~720℃;

[0045] Degassing and refining: adjust the smelting temperature to 700-720°C, add hexachloroethane for degassing and refining, the addition amount is 0.5%, stir evenly for 20 minutes, and then purify and remove slag;

[0046] Modification and secondary refining: adjust the melting temperature to 730-740°C, add Al-Sr modifier for modification treatment, after adding for 20 minutes, adjust the melting temperature to 700-720°C, add degassing refining agent, the addition amount is 0.2%, and stir evenly for 8 minutes , then remove the slag and prepare for pouring;

[0047] Pouring and casting: adjust the alloy temperature at 680-720°C, and the mold temperature at 180-250°C.

[0048] The mechanical properties of the obtained alloy are: the tensile strength is 290MPa, the elongation is 5%, and the yield strength is 230MPa. ...

Embodiment 3

[0050] 1 ton of aluminum alloy material with a domestic brand of 6061, take a piece to test the silicon content in it, after getting the test value, put the aluminum alloy with a domestic brand of 6061 into the aluminum melting furnace, and then add it to the aluminum melting furnace after the aluminum alloy is melted Silicon or aluminum-silicon alloy, so that the silicon content in the aluminum alloy in the hot-melt state is 0.8-2.0%, and the melting temperature is 700-750°C;

[0051] Degassing and refining: adjust the smelting temperature to 700-720 °C, add hexachloroethane for degassing and refining, the addition amount is 0.2%, stir evenly for 15 minutes, and then purify and remove slag;

[0052] Modification and secondary refining: adjust the melting temperature to 730-750 °C, add Al-Sr modification agent for modification treatment, after adding for 10 minutes, adjust the melting temperature to 700-720 °C, add degassing refining agent, the addition amount is 0.3%, and stir e...

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Abstract

The invention relates to cast aluminum alloy capable of being anodized and a preparation method thereof. The cast aluminum alloy capable of being anodized is prepared from, by weight, 0.8%-2.0% of Si, 0.8%-3.0% of Mg, 0.1%-0.8% of Mn, less than 0.3% of Fe, less than 0.3% of Cu, less than 0.3% of Zn, less than 0.05% of at least one of the trace elements including Ti, B, Re and Zr, and the balance Al. The preparation method comprises the steps that firstly, smelting is conducted, then degassing and refining are conducted, the smelting temperature is adjusted, hexachloroethane is added for degassing and refining, and purifying and slagging-off are conducted; secondly, modification and secondary refining are conducted, the smelting temperature is adjusted to be 730-750 DEG C, an Al-Sr modificator is added for modification treatment, the smelting temperature is adjusted to be 700-720 DEG C, degassing and refining agents are added, and slagging-off is conducted; and finally, pouring and casting are conducted. By the adoption of the cast aluminum alloy capable of being anodized and the preparation method thereof, the oxidation effect is more excellent, a film is thick, and the color and luster are uniform; by controlling the contents of the main alloy elements, the cast aluminum alloy has high strength and formability.

Description

technical field [0001] The invention relates to an aluminum alloy, in particular to an anodizable cast aluminum alloy and a preparation method thereof, belonging to the technical field of nonferrous metals. Background technique [0002] Aluminum is a very active metal, and aluminum and its alloys naturally form a layer of Al in the air. 2 o 3 ·H 2 O or Al 2 o 3 The oxide film can protect the aluminum matrix from being further corroded in neutral and weakly acidic solutions, and plays a certain protective role. But for a slightly harsh environment, this naturally formed film in the air is not enough to really protect the aluminum substrate. With the continuous improvement and development of the aluminum product industry, people began to use various methods to meet the technical requirements, and anodic oxidation is the most commonly used one. [0003] In recent years, domestic researchers have done a lot of research on the anodic oxidation process of aluminum alloys. Th...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C1/03
CPCC22C21/00C22C1/026C22C1/03
Inventor 孙珏孟祥豹杨青许若震
Owner SUZHOU SANJI FOUNDRY EQUIP
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