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Al-re-y alloy and preparation method thereof

An al-re-y, alloy technology, applied in the field of Al-RE-Y alloy and its preparation, can solve the problems of inability to achieve the performance of cast aluminum alloy, insufficient heat resistance, etc., and achieve high efficiency, excellent comprehensive performance, and process simple effect

Active Publication Date: 2022-04-22
JIANGSU HUAQI ALUMINUM SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The present invention provides an Al-RE-Y alloy and its The preparation method is that after the alloy is die-cast, the room temperature tensile strength of the alloy reaches 235MPa, and the elongation reaches 11%; Tensile strength up to 140MPa, elongation up to 14%; thermal conductivity up to 175W / (m K)

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  • Al-re-y alloy and preparation method thereof
  • Al-re-y alloy and preparation method thereof

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Embodiment 1

[0044] The weight percent of an Al-RE-Y alloy is: according to the theoretical ratio, 11wt% Ce, 5wt% Y, and the rest are Al elements and inevitable impurity elements.

[0045] Its preparation method is (1) after properly considering burning loss, according to above-mentioned Al-RE-Y alloy composition and stoichiometric ratio, calculate the consumption of required raw material; Industrial pure aluminum ingot, Al-20Ce and Al-10Y master alloy Remove the oxide layer and dry and preheat to 200°C; calculate the amount of raw materials required according to the composition and stoichiometric ratio of the alloy; (2) Melt the industrial pure aluminum ingot accounting for 25% of the height of the crucible into a molten pool at 720°C Finally, add the remaining aluminum ingots; (3) After the aluminum ingots are completely melted, heat up to 750°C, add Al-20Ce and Al-10Y master alloys in 2 to 4 times, and keep the temperature constant at 750°C, stirring until All melting; (4) 40-60 minutes...

Embodiment 2

[0049] The weight percent of an Al-RE-Y alloy is: according to the theoretical ratio, 3wt% La, 0.2wt% Y, and the rest are Al element and unavoidable impurity elements.

[0050]Its preparation method is (1) after properly considering burning loss, according to above-mentioned Al-RE-Y alloy composition and stoichiometric ratio, calculate the consumption of required raw material; Industrial pure aluminum ingot, Al-20La and Al-10Y intermediate alloy Remove the oxide layer and dry and preheat to 200°C; calculate the amount of raw materials required according to the composition and stoichiometric ratio of the alloy; (2) Melt the industrial pure aluminum ingot accounting for 25% of the height of the crucible into a molten pool at 720°C Finally, add the remaining aluminum ingots; (3) After the aluminum ingots are completely melted, heat up to 750°C, add Al-20La and Al-10Y master alloys in 2 to 4 times, and keep the temperature constant at 750°C, stirring until All melted and kept warm...

Embodiment 3

[0054] The weight percent of an Al-RE-Y alloy is: according to the theoretical ratio, 5wt% La, 3wt% Ce, 3wt% Y, and the rest are Al elements and inevitable impurity elements.

[0055] 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; industrially pure aluminum ingot, Al-20La and Al-20Ce and Al- All 10Y master alloys are deoxidized and preheated to 200°C; according to the composition and stoichiometric ratio of the alloy, calculate the amount of raw materials required; After melting into a molten pool, add the remaining aluminum ingots; (3) After the aluminum ingots are completely melted, raise the temperature to 750°C, add Al-20La, Al-20Ce and Al-10Y master alloys in 2 to 4 times, and keep the temperature Stir at 750°C until it is completely melted and keep it warm for 30 minutes; (4) 40-60 minutes before die casting...

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Abstract

The invention provides an Al-RE-Y alloy and a preparation method thereof. The chemical composition of the alloy is: 3-11% RE, 0.1-5% Y, and the balance is Al and other unavoidable impurities. Wherein, RE is at least one element among La and Ce. After die-casting the Al-RE-Y alloy of the present invention, the tensile strength of the die-cast alloy at room temperature reaches 235 MPa, and the elongation rate is 11%; the high-temperature tensile tensile strength reaches 120 MPa at 250°C, and the elongation rate is 19%; after gravity casting , the tensile strength at room temperature reaches 140MPa, the elongation rate is 14%; the thermal conductivity is 175W / (m K); the alloy can be used without subsequent heat treatment, which meets the high-end requirements for lightweight development in aerospace, military, automotive and other industries need.

Description

technical field [0001] The invention relates to an Al-RE-Y alloy and a preparation method thereof, belonging to the field of industrial aluminum alloys and the manufacture thereof. 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 loss. Heat-resistant aluminum alloys used in mechanical equipment are required to maintain good mechanical properties and creep fatigue resistance at ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C1/03C22C1/06
CPCC22C21/00C22C1/026C22C1/03C22C1/06
Inventor 叶兵谢石华王立扬
Owner JIANGSU HUAQI ALUMINUM SCI & TECH