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

Method used

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Examples

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Example Embodiment

[0036] Example 1

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

[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, 20 ppm P, 100 ppm Sr , Fe and other inevitable impurities are less than 0.4%, and the rest is Al.

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

[0040] The first step is to smelt the alloy; the specific steps of the smelting process are as follows: (1) Preheat the smelted raw materials to 100°C in an oven, keep the temperature for more than 2 hours, clean and remove rust on the surface of the slagging tools, bell jars, etc., and coat them with paint. The coating is made of 25% talc powder and 5% water glass mixed with an appropriate amount of water, ...

Example Embodiment

[0044] Example 2

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

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

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

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

Example Embodiment

[0052] Example 3

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

[0054] In the first aspect, this embodiment provides a high-plasticity cast 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 inevitable impurities are less than 0.4%, and the rest is Al.

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

[0056] The first step is to smelt the alloy; the specific steps of the smelting process are as follows: (1) Preheat the smelted raw materials in an oven to 200°C, keep the temperature for more than 2 hours, clean the surface of the slagging tools, bell jars, etc., and coat them with paint. The coating is made of 25% talc powder and 5% water glass mixed with an appropriate amount of water, and...

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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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