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High-thermal-conductivity corrosion-resistant Al-RE-Y-Zr alloy suitable for gravity casting and preparation method thereof

An al-re-y-zr and gravity casting technology, which is applied in the field of high thermal conductivity and corrosion-resistant Al-RE-Y-Zr alloy and its preparation, can solve the problems of toughness, heat resistance and thermal conductivity that cannot meet the performance requirements, etc.

Active Publication Date: 2020-07-07
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problem that the existing cast aluminum alloy cannot meet the performance requirements required by the industry due to insufficient strength, toughness, heat resistance and heat conduction, and its application is greatly limited, the present invention provides a high heat conduction and corrosion resistance suitable for gravity casting. Al-RE-Y-Zr alloy and its preparation method. After gravity casting, the alloy has a tensile strength of up to 175MPa at room temperature, an elongation of more than 10%, a yield strength of more than 86MPa, and a thermal conductivity of more than 160W / (m·K); Corrosion rate less than 0.03mm / yr

Method used

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  • High-thermal-conductivity corrosion-resistant Al-RE-Y-Zr alloy suitable for gravity casting and preparation method thereof

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Effect test

Embodiment 1

[0035] The weight percent of a kind of high thermal conductivity corrosion-resistant Al-RE-Y-Zr alloy suitable for gravity casting is: according to the theoretical ratio, 11wt% Ce, 7wt% Y, 0.6wt% Mg, 0.01wt% Zr, the rest is Al elements and unavoidable impurity elements.

[0036] Its preparation method is (1) after properly considering burning loss, according to the above-mentioned Al-RE-Y alloy composition and stoichiometric ratio, calculate the consumption of required raw material; Industrial pure aluminum ingot, industrial pure magnesium ingot, Al-20Ce, Al Both -10Y and Al-5Zr master alloys remove the oxide layer and dry and preheat to 180-220°C; calculate the amount of raw materials required according to the composition and stoichiometric ratio of the alloy; (2) the industrial After the pure aluminum ingot is melted into a molten pool at 720°C, the remaining aluminum ingot is added; (3) After the aluminum ingot is completely melted, the temperature is raised to 750°C, and t...

Embodiment 2

[0039] The weight percent of a kind of high thermal conductivity corrosion-resistant Al-RE-Y-Zr alloy suitable for gravity casting is: according to the theoretical ratio, 5wt% La, 0.2wt% Y, 0.5wt% Mg, 0.08wt% Zr, the rest is Al element and inevitable impurity elements.

[0040] Its preparation method is (1) after properly considering the burning loss, according to the above-mentioned Al-RE-Y alloy composition and stoichiometric ratio, calculate the consumption of required raw materials; industrial pure aluminum ingot, industrial pure magnesium ingot, Al-20La, Al Both -10Y and Al-5Zr master alloys remove the oxide layer and dry and preheat to 180-220°C; calculate the amount of raw materials required according to the composition and stoichiometric ratio of the alloy; (2) the industrial After the pure aluminum ingot is melted into a molten pool at 720°C, the remaining aluminum ingot is added; (3) After the aluminum ingot is completely melted, the temperature is raised to 750°C, a...

Embodiment 3

[0043] The weight percent of a kind of high thermal conductivity corrosion-resistant Al-RE-Y-Zr alloy suitable for gravity casting is: according to the theoretical ratio, 5wt% La, 3wt% Ce, 3wt% Y, 0.8wt% Mg, 0.2wt% Zr , and the rest are Al elements and inevitable impurity elements.

[0044] Its preparation method is (1) after properly considering the burning loss, according to the above-mentioned Al-RE-Y alloy composition and stoichiometric ratio, calculate the consumption of required raw materials; industrial pure aluminum ingot, industrial pure magnesium ingot, Al-20La, Al -20Ce, Al-10Y and Al-5Zr master alloys are all removed from the oxide layer and dried and preheated to 180-220°C; calculate the amount of raw materials required according to the composition and stoichiometric ratio of the alloy; (2) will account for the height of the crucible After 25% industrial pure aluminum ingots were melted into a molten pool at 720°C, the remaining aluminum ingots were added; (3) Aft...

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Abstract

The invention provides a high-thermal-conductivity corrosion-resistant Al-RE-Y-Zr alloy suitable for gravity casting and a preparation method thereof. The alloy comprises, by mass percent, 5%-16% of RE, 0.1%-7% of Y, 0.5%-0.8% of Mg, 0.01%-0.5% of Zr and the balance Al and inevitable impurity elements. RE is at least one of La and Ce. After the high-thermal-conductivity corrosion-resistant Al-RE-Y-Zr alloy is subjected to gravity casting, the room temperature tensile strength reaches up to 175 MPa, the yield strength is 86 MPa or above, the ductility is 10% or above, and the heat conductivitycoefficient is 160 W / (m.K) or above; and the high-end requirements of aerospace, war industry, cars and other industries for light weight development are met

Description

technical field [0001] The invention belongs to the technical field of aluminum alloys for industrial use and its manufacture, and relates to an Al-RE-Y-Zr alloy and a preparation method thereof, in particular to a high thermal conductivity and corrosion-resistant Al-RE-Y-Zr alloy suitable for gravity casting and its preparation method. Background technique [0002] Aluminum alloy is a general term for alloys based on aluminum. Aluminum alloy has the characteristics of low density and high strength, and has excellent specific strength. The main alloy systems are Al-Si system, Al-Cu system, Al-Mg system and so on. It has a wide range of applications in the fields of transportation, automobiles, machinery manufacturing, and aerospace. With the development of science and technology, people have higher and higher requirements for technological products, especially electronic products such as mobile phones for daily use. On the road of miniaturization and light weight of elect...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C1/03C22C1/06
CPCC22C1/026C22C1/03C22C1/06C22C21/00
Inventor 叶兵孔向阳王立扬
Owner SHANGHAI JIAO TONG UNIV
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