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High-plasticity cast aluminum alloy and extrusion casting preparation method thereof

A technology for casting aluminum alloy and squeeze casting, which is applied in the fields of casting aluminum alloy and its preparation, high plasticity casting aluminum alloy and its squeeze casting preparation, can solve the problem of limiting the application range of alloy, increasing the hot cracking and corrosion tendency of alloy, Reduce casting performance and other problems to achieve the effect of improving plasticity, high production efficiency and low cost

Active Publication Date: 2015-04-29
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the Cu element added to the Al-Si alloy will increase the hot cracking and corrosion tendency of the alloy and reduce the casting performance, thus limiting the application range of the alloy in industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035]This embodiment relates to a high plasticity cast aluminum alloy and a preparation method thereof by squeeze casting.

[0036] In the first aspect, the present invention provides a high plasticity casting aluminum alloy, the composition (weight content) of the aluminum alloy is: 7.5% Si, 0.5% Mg, 0.2% Mn, 0.1% Ti, 0.01% Y, 0.6% Fe, 20ppm P, 100ppm Sr, other unavoidable impurities less than 0.2%, the rest is Al.

[0037] In a second aspect, the present invention provides a method for preparing the aluminum alloy by squeeze casting, comprising the following steps:

[0038] The first step is to smelt the alloy to obtain the aluminum alloy melt; the specific steps of the smelting process are:

[0039] (1) Preheat the smelting raw materials in an oven to 100°C, keep it warm for more than 2 hours, clean and derust the surfaces of slag removal tools, bell jars, etc. and paint them with 25% talcum powder and 5% water glass mixed with water, and then placed on the surface of th...

Embodiment 2

[0044] This embodiment relates to a high plasticity cast aluminum alloy and a preparation method thereof by squeeze casting.

[0045] In the first aspect, the present invention provides a high plasticity casting aluminum alloy, the aluminum alloy composition (weight content): 8.5% Si, 0.6% Mg, 0.3% Mn, 0.2% Ti, 1.5% Gd, 0.7% Fe, 40ppm P, 200ppm Sr, other unavoidable impurities less than 0.2%, the rest is Al.

[0046] In a second aspect, the present invention provides a method for preparing a high-plasticity cast aluminum alloy by squeeze casting, specifically as follows:

[0047] The first step is to smelt the alloy to obtain the aluminum alloy melt; the specific steps of the smelting process are: (1) Preheat the smelting raw material to 200°C in an oven, keep it warm for more than 2 hours, and clean the surface of the slag removal tool, bell jar, etc. Paint for rust removal. The paint is made of 25% talcum powder and 5% water glass with an appropriate amount of water, and th...

Embodiment 3

[0052] This embodiment relates to a high plasticity cast aluminum alloy and a preparation method thereof by squeeze casting.

[0053] In the first aspect, this embodiment provides a high plasticity casting aluminum alloy, the aluminum alloy composition (weight content): 9.5% Si, 0.7% Mg, 0.4% Mn, 0.3% Ti, 0.1% Gd, 0.1% Y, 0.02% Nd, 0.8% Fe, 60ppm P, 300ppm Sr, other unavoidable impurities are less than 0.4%, and the rest is Al.

[0054] In the second aspect, the present invention provides a method for preparing the aluminum alloy by squeeze casting:

[0055] The first step is to smelt the alloy to obtain the aluminum alloy melt; the specific steps of the smelting process are: (1) Preheat the smelting raw material to 200°C in an oven, keep it warm for more than 2 hours, and clean the surface of the slag removal tool, bell jar, etc. Paint for rust removal. The paint is made of 25% talcum powder and 5% water glass with an appropriate amount of water, and then placed on the surfa...

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Abstract

The invention discloses a high-plasticity cast aluminum alloy and an extrusion casting preparation method thereof, belonging to the technical fields of metal materials and metallurgy. The alloy comprises the following components in percentage by weight: 7.5-13.5% of Si, 0.5-0.8% of Mg, 0.2-0.5% of Mn, 0.1-0.4% of Ti, 0.01-1.5% of RE, 0.6-1.3% of Fe, at most 100 ppm of P, 100-600 ppm of Sr and the balance of Al. The RE is one or more of Gd, Y, Nd, Sm, Er, Yb and La. After the high-plasticity cast aluminum alloy is subjected to extrusion casting and solid solution+artificial aging treatment, the elongation percentage delta of the alloy is greater than or equal to 22%. The alloy has the advantages of excellent casting performance and low cost. The method has the advantages of simple technique, high production efficiency and obvious progress, and widens the application range of the Al-Si cast aluminum alloy.

Description

technical field [0001] The invention relates to a cast aluminum alloy and a preparation method thereof, in particular to a high-plasticity cast aluminum alloy and a squeeze casting preparation method thereof, belonging to the field of metal materials and metallurgy. Background technique [0002] As a traditional metal material, cast aluminum alloy is widely used in aviation, aerospace, automobile, machinery and other industries due to its low density and high specific strength. With the development of modern industry and new casting technologies, the demand for cast aluminum alloys, such as cast aluminum alloys with high strength, high plasticity, excellent wear resistance and corrosion resistance, is increasing. After decades of development, high-strength aluminum alloys have formed a complete series, with stable performance and increasingly perfect production methods, becoming an indispensable alloy system in the field of materials. However, the current high-strength cast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22F1/043B22D18/02
CPCB22D18/02C22C21/02C22F1/043
Inventor 王渠东隋育栋
Owner SHANGHAI JIAO TONG UNIV
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