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Preparation method of high-strength die casting aluminium alloy

A casting aluminum alloy, high-strength technology, applied in the field of aluminum alloy, can solve the problems of low strength and elongation, and achieve the effect of improving mechanical properties and structural stability

Inactive Publication Date: 2015-09-02
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-strength die-casting aluminum alloys, which can solve the problems of low strength and elongation of existing die-casting aluminum alloys

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0016] The preparation method of the high-strength die-casting aluminum alloy of this embodiment comprises the following steps:

[0017] A. Prepare the components of the aluminum alloy according to the following weight percentages: Si10%, Cu5%, Zn1.2%, Mn0.3%, Mg0.1%, Ti0.05%, Sr0.01%, Cr0. 15%, B0.02%, Fe0.22%, the total weight of other impurities is less than 0.25%, and the balance is Al; wherein, the Al is pure aluminum with a purity of 99.9%, Cu is electrolytic copper, and Mg is industrial pure magnesium ; Heating each component of the alloy to 110°C, then melting the aluminum at a melting temperature of 740°C, and keeping the temperature for 10 minutes after melting into molten aluminum;

[0018] B. Add Si and Mn to molten aluminum to melt in sequence, then cool down to 650°C, and completely press Mg into the molten alloy;

[0019] C. Raise the temperature to 720°C to remove scum, then add the remaining alloy components to the alloy liquid in turn, keep it...

Embodiment 2

[0024] The preparation method of the high-strength die-casting aluminum alloy of this embodiment comprises the following steps:

[0025] A. Prepare the components of the aluminum alloy according to the following weight percentages: Si12.8%, Cu3.3%, Zn0.8%, Mn0.6%, Mg0.4%, Ti0.15%, Sr0.015 %, Cr0.05%, B0.025%, Fe0.2%, the total weight of other impurities is less than 0.25%, and the balance is Al. Among them, the Al is pure aluminum with a purity of 99.9%, Cu is electrolytic copper, and Mg is Industrial pure magnesium; heat the components of the alloy to 120°C, then melt the aluminum at 750°C, and heat it for 8 minutes after melting into molten aluminum;

[0026] B. Add Si and Mn to molten aluminum to melt in turn, then lower the temperature to 655°C, and completely press Mg into the molten alloy;

[0027] C. Raise the temperature to 740°C to remove scum, then add the remaining alloy components to the alloy liquid in turn, keep it warm for 25 minutes, then raise ...

Embodiment 3

[0032] The preparation method of the high-strength die-casting aluminum alloy of this embodiment comprises the following steps:

[0033] A. Prepare the components of the aluminum alloy according to the following weight percentages: Si15%, Cu3%, Zn0.1%, Mn1%, Mg0.6%, Ti0.05%, Sr0.02%, Cr0.1% , B0.04%, Fe0.1%, the total weight of other impurities is less than 0.25%, and the balance is Al, wherein the Al is pure aluminum with a purity of 99.9%, Cu is electrolytic copper, and Mg is industrial pure magnesium; the alloy Each component is heated to 130°C, and then the aluminum is melted at a melting temperature of 760°C, which is melted into molten aluminum and then kept for 6 minutes;

[0034] B. Add Si and Mn to the molten aluminum to melt in sequence, then cool down to 660°C, and completely press Mg into the molten alloy;

[0035] C. Raise the temperature to 750°C to remove scum, then add the remaining alloy components to the alloy liquid in turn, keep it warm for ...

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Abstract

The invention discloses a preparation method of a high-strength die casting aluminium alloy, relating to the technical field of aluminium alloy preparation. The method comprises the following steps: heating all the components of the alloy to 110-130 DEG C, then melting aluminium at 740-760 DEG C to obtain molten aluminium and then maintaining the temperature for 6-10 minutes; adding Si and Mn to molten aluminium, melting Si and Mn in sequence, then reducing the temperature to 650-660 DEG C and pressing Mg in the alloy liquid entirely; raising the temperature to 720-750 DEG C, removing dross, then adding the remaining alloy components to the alloy liquid in sequence, maintaining the temperature for 20-30 minutes, then raising the temperature to 770-780 DEG C to carry out refining, maintaining the temperature for 10-15 minutes and removing the dross; cooling an obtained melt to 660-680 DEG C and then pressing the melt in a die preheated to 180-220 DEG C to undergo die casting. The problems that the existing die casting aluminium alloys have lower strength and elongation are solved by adopting the preparation method.

Description

technical field [0001] The invention relates to the technical field of aluminum alloys, in particular to a method for preparing high-strength die-casting aluminum alloys. 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 Alloy demand continues to expand. Die-casting aluminum alloy is an aluminum alloy obtained by pressure casting. This die-casting aluminum alloy can be used to produce workpieces with complex shapes, and its cost is low, so it is widely used. However, the strength and elongation of the die-casting aluminum alloy manufactured by the existing process are low, and it is prone to deformation and even breakage of mechanical parts, which cannot meet the working requirements of some ...

Claims

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Application Information

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IPC IPC(8): C22C21/02C22C1/02B22D17/00C22F1/043
Inventor 谭皓原
Owner LIUZHOU BAITIAN MACHINERY
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