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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 insufficient heat resistance, inability to achieve the performance of cast aluminum alloy, etc., and achieves reduction of burning loss, simple and easy smelting process The effect of controlling and simplifying the process

Active Publication Date: 2020-08-04
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)

Method used

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  • 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 Al-RE-Y alloy comprises the following chemical components of, in percentage by mass, 3% - 11% of RE, 0.1% - 5% of Y and the balance Al and other inevitable impurities, wherein the RE is at least one element of La and Ce. After the Al-RE-Y alloy is subjected to pressure casting, the room-temperature tensile strength of the die-cast alloy reaches 235 MPa, and the elongation is 11%; the high-temperature tensile strength at 250 DEG C reaches 120MPa, and the elongation is 19%; after gravity casting, the room-temperature tensile strength reaches 140 MPa, the elongation is 14%, and the heat conductivity coefficient is 175 W / (m.K); and the alloy can be used without subsequent heat treatment, and the high-end requirementsof aerospace, military industry, automobiles and other industries for lightweight development are met.

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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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
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