High-strength-toughness and heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting and preparation method thereof

An al-re-y-zr, high-strength technology, applied in the field of high-strength, toughness and heat-resistant Al-RE-Y-Zr alloy and its preparation, can solve the problems of inability to achieve the performance of cast aluminum alloys and insufficient heat resistance, and achieve The smelting process is simple and easy to control, reducing burning loss, improving energy utilization and production efficiency

Active Publication Date: 2020-07-14
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to solve the problem that the existing cast rare earth aluminum alloys cannot achieve the performance of cast aluminum alloys such as A380 due to insufficient strength, toughness and heat resistance, resulting in extremely limited applications, the invention provides a high-strength, toughness-resistant aluminum alloy suitable for pressure casting. Hot Al-RE-Y-Zr alloy and its preparation method. After the alloy is die cast, the room temperature tensile strength of the alloy is as high as 275MPa, the yield strength is as high as 175MPa, and the elongation is as high as 19.5%. The high temperature tensile strength at 250°C Up to 134MPa, elongation up to 25%

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  • High-strength-toughness and heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting and preparation method thereof

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Embodiment 1

[0038] A high-strength toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting has a weight percentage of: according to the theoretical ratio, 11wt% Ce, 5wt% Y, 0.3wt% Mg, 0.01wt% Zr, and the rest are Al elements and unavoidable impurity elements.

[0039] 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 the Al-2...

Embodiment 2

[0042] The weight percent of a kind of high-strength toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting is: according to the theoretical ratio, 3wt% La, 0.2wt% Y, 0.1wt% Mg, 0.08wt% Zr, the rest is Al element and inevitable impurity elements.

[0043] 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 the Al-2...

Embodiment 3

[0046] The weight percent of a high-strength and tough heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting is: according to the theoretical ratio, 5wt% La, 3wt% Ce, 3wt% Y, 0.2wt% Mg, 0.2wt% Zr , and the rest are Al elements and inevitable impurity elements.

[0047] Its preparation method is (1) after properly considering the burning loss, calculate the consumption of required raw materials according to the above-mentioned Al-RE-Y alloy composition and stoichiometric ratio; combine industrial pure aluminum ingot, industrial pure magnesium ingot and 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) After t...

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Abstract

The invention provides a high-strength-toughness and heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting and a preparation method thereof. The alloy comprises the following elements in percentage by mass: 3-11% of RE, 0.1-5% of Y, 0.1-0.4% of Mg, 0.01-0.5% of Zr and the balance of Al element and inevitable impurity elements, wherein RE is at least one of La and Ce. After the high-strength-toughness and heat-resistant Al-RE-Y-Zr alloy is subjected to pressure casting, the room-temperature tensile strength of the die-cast alloy is up to 275MPa, and the elongation percentage is up to 19.5%; and the high-temperature tensile strength at 250 DEG C is up to 134MPa, and the elongation percentage is up to 25%. The alloy can be used without subsequent heat treatment, and satisfies the high-end demands for lightweight development in aerospace, military industry, automobiles and other industries.

Description

technical field [0001] The invention belongs to the technical field of industrial aluminum alloys and their manufacture, and relates to an Al-RE-Y-Zr alloy and a preparation method thereof, in particular to a high-strength, toughness and heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting and its preparation method. Background technique [0002] Aluminum alloy is a general term for alloys based on aluminum. It 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. In particular, the heat-resistant aluminum alloy used as the wire needs to have good heat resistance under the condition of ensuring good electrical conductivity and oxidation resistance, which is conducive to increasing the current carrying capacity and reducing los...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C1/03C22C1/06B22D17/00
CPCC22C21/00C22C1/03C22C1/026C22C1/06B22D17/00
Inventor 叶兵王立扬丁文江
Owner SHANGHAI JIAO TONG UNIV
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