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High plasticity casting aluminum alloy and pressure casting preparation method thereof

A technology for casting aluminum alloys with high plasticity, applied in the field of metal materials and metallurgy, can solve the problems of reducing the casting performance, limiting the application range of the alloy, increasing the hot cracking and corrosion tendency of the alloy, etc., achieving high production efficiency, improving plasticity, Small grain effect

Active Publication Date: 2017-02-01
SHANGHAI JIAOTONG 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

[0033] This embodiment relates to a high plasticity casting aluminum alloy and a preparation method thereof by pressure casting.

[0034] In the first aspect, this embodiment provides a high plasticity cast aluminum alloy, the composition (weight content) of the aluminum alloy is: 7.5% Si, 0.5% Mg, 0.2% Mn, 0.1% Ti, 0.05% Y, 0.6% Fe , 20ppm P, 100ppm Sr, other unavoidable impurities are less than 0.2%, and the rest is Al.

[0035]In the second aspect, this embodiment provides a method for preparing the high-plastic cast aluminum alloy by pressure casting, which includes the following steps:

[0036] The first step is to smelt the alloy to obtain an aluminum alloy melt; wherein, the specific steps of the process of smelting the alloy are: (1) Preheat the smelting raw material in an oven to 100° C. The bell jar and other surfaces are cleaned and derusted and coated with paint. The paint is made of 25% talcum powder and 5% water glass with an appropriate amount of water, and the...

Embodiment 2

[0040] This embodiment relates to a high plasticity casting aluminum alloy and a preparation method thereof by pressure casting.

[0041] In the first aspect, this embodiment provides a high-plasticity casting aluminum alloy, the composition (weight content) of the aluminum alloy is: 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 are less than 0.2%, and the rest is Al.

[0042] In the second aspect, this embodiment provides a method for preparing the high-plastic cast aluminum alloy by pressure casting, which includes the following steps:

[0043] The first step is to smelt the alloy to obtain an aluminum alloy melt; wherein, the specific steps of the process of smelting the alloy are: (1) Preheat the smelting raw material in an oven to 200° C. The bell jar and other surfaces are cleaned and derusted and coated with paint. The paint is made of 25% talcum powder and 5% water glass with an appropriate amount of water, and...

Embodiment 3

[0047] This embodiment relates to a high plasticity casting aluminum alloy and a preparation method thereof by pressure casting.

[0048] In the first aspect, the present invention provides a high plasticity casting aluminum alloy, the composition (weight content) of the aluminum alloy is: 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 0.2%, and the rest is Al.

[0049] In the second aspect, this embodiment provides a method for preparing the high-plastic cast aluminum alloy by pressure casting, which includes the following steps:

[0050] The first step is to smelt the alloy to obtain an aluminum alloy melt; wherein, the specific steps of the process of smelting the alloy are: (1) Preheat the smelting raw material in an oven to 200° C. The bell jar and other surfaces are cleaned and derusted and coated with paint. The paint is made of 25% talcum powder and 5% water glass with an appropria...

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Abstract

The invention discloses a high-plasticity cast aluminum alloy and a pressure casting preparation method thereof, belonging to the technical fields of metal materials and metallurgy. The high-plasticity cast aluminum alloy comprises the following components in percentage by weight: 7.5-14.5% 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 pressure casting, the elongation percentage delta of the alloy is greater than or equal to 20%. 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 casting aluminum alloy and a preparation method thereof, in particular to a high-plasticity casting aluminum alloy and a pressure 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-streng...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/02C22C1/03C22C1/06B22D17/00
CPCB22D17/00C22C1/026C22C1/03C22C1/06C22C21/02
Inventor 王渠东隋育栋
Owner SHANGHAI JIAOTONG UNIV