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

A casting aluminum alloy and gravity casting technology, which is applied in the field of metal materials and metallurgy, can solve problems such as limiting the application range of alloys, increasing alloy hot cracking and corrosion tendency, and reducing casting performance, so as to improve plasticity, high production efficiency, low cost effect

Active Publication Date: 2015-05-20
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

[0037] This embodiment relates to a high plasticity casting aluminum alloy and its preparation method by gravity casting.

[0038] In the first aspect, this embodiment provides a high plasticity cast aluminum alloy, the alloy composition (weight content): 7.5% Si, 0.5% Mg, 0.2% Mn, 0.1% Ti, 0.01% Y, 20ppm P, 100ppm Sr , Fe and other unavoidable impurities are less than 0.4%, and the rest is Al.

[0039] In the second aspect, this embodiment provides a method for preparing the high plasticity cast aluminum alloy by gravity casting, comprising the following steps:

[0040] The first step is to smelt the alloy; the specific steps of the smelting process are: (1) Preheat the smelting raw materials in an oven to 100°C, keep the temperature for more than 2 hours, clean and derust the surface of the slag removal tool, bell jar, etc., and apply paint, The paint is made of 25% talcum powder and 5% water glass with an appropriate amount of water, and then baked on the surface of the fu...

Embodiment 2

[0045] This embodiment relates to a high plasticity casting aluminum alloy and its preparation method by gravity casting.

[0046] In the first aspect, this embodiment provides a high plasticity casting aluminum alloy, the alloy composition (weight content): 8.5% Si, 0.6% Mg, 0.3% Mn, 0.2% Ti, 1.0% Gd, 40ppm P, 200ppm Sr , Fe and other unavoidable impurities are less than 0.4%, and the rest is Al.

[0047] In the second aspect, this embodiment provides a method for preparing the high plasticity cast aluminum alloy by gravity casting, comprising the following steps:

[0048] The first step is to smelt the alloy; the specific steps of the smelting process are: (1) Preheat the smelting raw materials in an oven to 200°C, keep the temperature for more than 2 hours, clean and derust the surface of the slag removal tools, bell jars, etc. and apply paint, The coating is made of 25% talcum powder and 5% water glass with an appropriate amount of water, and then baked on the surface of ...

Embodiment 3

[0053] This embodiment relates to a high plasticity casting aluminum alloy and its preparation method by gravity casting.

[0054] In the first aspect, this embodiment provides a high plasticity casting aluminum alloy, the 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, 60ppm P, 300ppm Sr, Fe and other unavoidable impurities are less than 0.4%, and the rest is Al.

[0055] In the second aspect, this embodiment provides a method for preparing the high plasticity cast aluminum alloy by gravity casting, comprising the following steps:

[0056] The first step is to smelt the alloy; the specific steps of the smelting process are: (1) Preheat the smelting raw materials in an oven to 200°C, keep the temperature for more than 2 hours, clean and derust the surface of the slag removal tools, bell jars, etc. and apply paint, The coating is made of 25% talcum powder and 5% water glass with an appropriate amount of water, and then baked o...

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Abstract

The invention discloses a high-plasticity cast aluminum alloy and a gravity casting preparation method thereof, and belongs to the fields of metal materials and metallurgy. The high-plasticity cast aluminum alloy is prepared from the following components in percentage by weight: 7.5 to 13.5% of Si, 0.5 to 0.8% of Mg, 0.2 to 0.5% of Mn, 0.1 to 0.4% of Ti, 0.01 to 1% of RE, not greater than 0.4% of Fe, not greater than 100ppm of P, 100 to 600ppm of Sr, and the balance of Al, wherein RE is one or some of Gd, Y, Nd, Sm, Er, Yb and La. After gravity casting, solid solution treatment and artificial aging treatment, the high-plasticity cast aluminum alloy has the elongation delta of being not less than 18%. The prepared alloy is outstanding in casting performance, low in cost, simple in process, high in production efficiency, and obvious in progress, and the applicable scope of Al-Si cast aluminum alloy is expanded.

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 gravity 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-strengt...

Claims

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Application Information

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IPC IPC(8): C22C21/02C22F1/043
CPCC22C1/026C22C1/03C22C21/02C22F1/043
Inventor 王渠东隋育栋
Owner SHANGHAI JIAO TONG UNIV
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