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Preparation method of high-density die-casting aluminum alloy

A casting aluminum alloy, compact technology, applied in the field of aluminum alloy manufacturing, can solve the problem of low compactness of die-casting aluminum, achieve good fluidity, avoid the introduction of gas, and reduce the effect of volume shrinkage

Inactive Publication Date: 2017-08-29
LIUZHOU BAITIAN MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing high-density die-casting aluminum alloy, which can solve the problem of low density of existing die-casting aluminum

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The preparation method of the high-density die-cast aluminum alloy of this embodiment includes the following steps:

[0018] A. Prepare the components of the aluminum alloy according to the following weight percentages: Si12.5%, Cu0.6%, Zn0.2%, Mn0.6%, Mg0.1%, Ti0.15%, Sr0.01 %, Cr0.15%, Fe1%, rare earth element 0.05%, the total weight of other impurities is less than 0.1%, the balance is Al, the rare earth element is La in the lanthanide rare earth; heat the alloy components to 110 ℃, then Melt the aluminum with a melting temperature of 740°C, and keep it for 10 minutes after melting into molten aluminum;

[0019] B. Add Si and Mn to the molten aluminum to melt in sequence, then lower the temperature to 650°C, and completely press Mg into the molten alloy;

[0020] C. Raise the temperature to 720°C to remove the scum, then add the remaining alloy components to the alloy liquid one by one, keep it for 30 minutes, then raise the temperature to 770°C for refining, keep it for 1...

Embodiment 2

[0025] The preparation method of the high-density die-cast aluminum alloy of this embodiment includes the following steps:

[0026] A. Prepare the components of the aluminum alloy according to the following weight percentages: Si11.2%, Cu0.3%, Zn0.1%, Mn0.4%, Mg0.4%, Ti0.05%, Sr0.015 %, Cr0.05%, Fe0.8%, rare earth elements 0.01%, the total weight of other impurities is less than 0.1%, the balance is Al, the rare earth elements are La and Pr in the lanthanide rare earth; heat the alloy components to 120°C, then melt the aluminum at a melting temperature of 750°C, and keep it for 8 minutes after melting into molten aluminum;

[0027] B. Add Si and Mn to the molten aluminum to melt in sequence, then lower the temperature to 655°C, and completely press Mg into the molten alloy;

[0028] C. Raise the temperature to 740°C to remove the scum, then add the remaining alloy components to the alloy liquid in sequence, keep it for 25 minutes, then raise the temperature to 775°C for refining, ke...

Embodiment 3

[0033] The preparation method of the high-density die-cast aluminum alloy of this embodiment includes the following steps:

[0034] A. Prepare the components of the aluminum alloy according to the following weight percentages: Si10%, Cu0.4%, Zn0.1%, Mn0.5%, Mg0.6%, Ti0.1%, Sr0.02%, Cr0.1%, Fe0.6%, rare earth element 0.15%, the total weight of other impurities is less than 0.1%, the balance is Al, the rare earth element is Ce in the lanthanide rare earth; heat the alloy components to 130°C, then Melt the aluminum at a melting temperature of 760℃, and keep it for 6 minutes after melting into molten aluminum;

[0035] B. Add Si and Mn to the molten aluminum to melt in sequence, then lower the temperature to 660°C, and completely press Mg into the molten alloy;

[0036] C. Raise the temperature to 750°C to remove the scum, then add the remaining alloy components to the alloy liquid one by one, keep it for 20 minutes, then raise the temperature to 780°C for refining, keep it for 10 minut...

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Abstract

The invention discloses a method for preparing a high-density die-casting aluminum alloy, which relates to the technical field of aluminum alloy manufacturing. The method comprises the following steps: heating each component of the alloy, and then melting the aluminum; adding Si and Mn to the aluminum liquid Melt in sequence, then cool down to 650-660°C, completely press Mg into the alloy liquid; raise the temperature to 720-750°C, remove scum, then add the remaining alloy components into the alloy liquid in turn, keep warm for 20-30 minutes, Then carry out refining to remove scum; when just pouring, the volume of alloy liquid is 65-70% of the volume of the pressure chamber, and the casting temperature is 600-620°C; slow injection, the speed is 0.3-0.5m / s, and then Carry out high-speed injection filling with an injection speed of 1.5m / s; after the filling is completed, pressurize the die-casting and inject with a pressure of 280‑300MPa. The invention solves the problem of low compactness of existing die-casting aluminum.

Description

Technical field [0001] The invention relates to the technical field of aluminum alloy manufacturing, in particular to a method for preparing high-density die-cast aluminum alloy. Background technique [0002] Aluminum alloy is a common lightweight metal material. It is widely used in industries such as automobiles, ships, aerospace, machinery, and communications. It has the characteristics of good processing performance and light weight. With the requirements of lightweight and low energy consumption, aluminum The demand for alloys continues to expand. Die-cast aluminum alloy is an aluminum alloy obtained by pressure casting. This type of die-cast aluminum alloy can be used to produce complex-shaped workpieces, and its cost is low, so its application is extremely common. At present, more and more attention has been paid to the compactness of die-cast aluminum alloys. The high compactness is beneficial to improve the mechanical properties. However, the existing die-cast aluminum ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D21/04B22D17/00C22C21/02C22C1/06
Inventor 谭科文谭皓原李丽萍
Owner LIUZHOU BAITIAN MACHINERY
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