Die casting aluminum alloy and preparation method thereof

A technology for casting aluminum alloys and aluminum alloy ingots, which is applied in the field of aluminum alloys to achieve the effects of avoiding silicon element enrichment, pure color, and good die-castability

Active Publication Date: 2015-03-25
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the technical problem that existing die-casting aluminum alloys have defects in die-castability, uniformity of coloring and mechanical strength, and provides a die-casting aluminum alloy with good die-castability, uniform coloring and high mechanical strength. Alloy and its preparation method

Method used

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Examples

Experimental program
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preparation example Construction

[0042] The invention provides a method for preparing a die-casting aluminum alloy, the method comprising the following steps:

[0043]S1 making Si, Sr, Mn and part of Al ingots respectively into master alloys to obtain Si agent, Sr agent and Mn agent;

[0044] S2 Add the aluminum ingot to the melting furnace and heat it until it is completely melted, then add the Mn agent until the Mn agent is fully melted;

[0045] S3, adding Mg ingot and Si agent to the molten liquid obtained in step S2, until the Mg ingot and Si agent are fully melted;

[0046] S4 adds Sr agent to the molten liquid that step S3 obtains, fully melts to Sr-agent;

[0047] S5 casting the molten solution obtained in step S4 into an aluminum alloy ingot;

[0048] S6 Die-casting aluminum alloy ingots to form die-cast aluminum alloy products;

[0049] Wherein, based on the total weight of the die-casting aluminum alloy, the content of Mg is 0.3-1 wt%, the content of Si is 1-5 wt%, the content of Sr is 0.03-0.7 ...

Embodiment 1

[0072] 1. Preparation of die-casting aluminum alloy

[0073] The composition and weight percentage of the prepared die-cast aluminum alloy are as follows: Mg: 0.6%, Si: 2.5%, Sr: 0.06%, Mn: 1.3%, Cr: 0.1%, Ti: 0.15%, and the balance is Al.

[0074] 1. Combine the above elements (except Mg) with aluminum to make silicon agent, strontium agent, manganese agent, chromium agent and titanium agent, and dry the silicon agent, strontium agent, manganese agent, chromium agent, titanium agent and mold Remove moisture; the mass content of silicon in the silicon agent is 90%, the mass content of strontium in the strontium agent is 10%, the mass content of manganese in the manganese agent is 80%, the mass content of chromium in the chromium agent is 80%, and the mass content of the titanium agent is 80%. The mass content of titanium is 80%, and the balance is aluminum;

[0075] 2. Put the aluminum ingot into the melting furnace and heat it to a constant temperature of 720°C. After it is ...

Embodiment 2

[0092] 1. Preparation of die-casting aluminum alloy

[0093] The composition and weight percentage of the prepared die-cast aluminum alloy are as follows: Mg: 0.8%, Si: 4.5%, Sr: 0.25%, Mn: 1.5%, Cr: 0.15%, Ti: 0.15%, and the balance is Al.

[0094] 1. Combine the above elements (except Mg) with aluminum to make silicon agent, strontium agent, manganese agent, chromium agent and titanium agent, and dry the silicon agent, strontium agent, manganese agent, chromium agent, titanium agent and mold Remove moisture; the mass content of silicon in the silicon agent is 85%, the mass content of strontium in the strontium agent is 15%, the mass content of manganese in the manganese agent is 85%, the mass content of chromium in the chromium agent is 85%, and the mass content of the titanium agent is 85%. The mass content of titanium is 85%, and the balance is aluminum;

[0095] 2. Preheat the furnace to 400°C, put the aluminum ingot into the furnace and heat it to a constant temperature...

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PUM

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Abstract

The invention provides a die casting aluminum alloy which comprises the following components in percentage by weight: 0.3%-1% of Mg, 1%-5% of Si, 0.03%-0.7% of Sr, 0.3%-1.5% of Mn and the balance of Al. The invention also provides a preparation method of the die casting aluminum alloy. A film obtained after the die casting aluminum alloy is subjected to anodic oxidation is uniform in color and good in texture. In addition, the mechanical property of the die casting aluminum alloy provided by the invention can meet the requirement.

Description

technical field [0001] The invention belongs to the field of aluminum alloys, in particular to a die-casting aluminum alloy and a preparation method thereof. Background technique [0002] As people's requirements for products become lighter and more decorative, aluminum alloys are getting more and more attention due to their excellent performance in these two aspects. The die-casting aluminum alloy has great advantages in terms of low cost and simple process because it can realize one-time molding of complex structures, which makes the application of die-casting aluminum alloy very common. [0003] However, the current die-casting aluminum alloys have defects in die-castability, uniformity of coloring and mechanical strength, which seriously affect the application of die-casting aluminum alloys in surface decoration. [0004] Common die-casting aluminum alloys mainly include aluminum-silicon-copper alloys, aluminum-magnesium alloys and aluminum-manganese alloys. Aluminum-s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C1/03
CPCC22C1/026C22C1/03C22C21/02
Inventor 王继厚郭丽芬陈梁
Owner BYD CO LTD
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