Preparation method of crystalline-amorphous aluminum-based composite material

An aluminum-based composite material and amorphous technology, which is applied in the field of casting aluminum alloy preparation, can solve problems such as poor plasticity at room temperature, and achieve the effects of less severe segregation, fast metal solidification, and extremely high metal solidification speed.

Inactive Publication Date: 2019-01-22
SHANDONG UNIV
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Problems solved by technology

However, for aluminum-based amorphous alloys, although their tensile strength is much higher than

Method used

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  • Preparation method of crystalline-amorphous aluminum-based composite material
  • Preparation method of crystalline-amorphous aluminum-based composite material
  • Preparation method of crystalline-amorphous aluminum-based composite material

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[0030] A method for preparing a crystal-amorphous aluminum-based composite material, comprising the following steps:

[0031] (1) Weigh Al, Ni, Co, Y and La high-purity metal elemental substances respectively according to the molar ratio of 86:6.75:2.25:3.25:1.75, the mass fraction of each metal elemental substance is ≥99.99wt.%, mixing, smelting; multiple times Alloy master ingot Al was prepared after smelting 86 Ni 6.75 co 2.25 Y 3.25 La 1.75 ;

[0032] (2) After the alloy master ingot is arc-melted under an argon protective atmosphere, the crystal-amorphous aluminum matrix composite material is prepared by rapid suction casting using a water-cooled copper mold as the cooling medium; the cooling speed of the suction casting process combined with the copper mold mold for 10 3 K / s~10 6 K / s, and the cooling rate of the upper part of the copper mold is lower than that of the lower part.

[0033] The invention utilizes the pressure difference between the furnace body and ...

Embodiment 1

[0046] A method for preparing a crystal-amorphous aluminum-based composite material, comprising the following steps:

[0047] (1) Finely grind Al, Ni, Co, Y and La metal elements to remove scale and attached impurities, respectively weigh Al, Ni, Co, Y and La according to the molar ratio of 86:6.75:2.25:3.25:1.75 Simple substance (weighing error is controlled within ±0.001g), after mixing, prepare 30g metal simple substance mixture, place the metal simple substance mixture in ethanol-acetone mixed solution and ultrasonically clean it for 10min to remove attached impurities, put it into high vacuum arc after drying In the smelting furnace, the alloy master ingot Al was prepared after repeated smelting 5 times 86 Ni 6.75 co 2.25 Y 3.25 La 1.75 , in the vacuum arc melting process, the absolute vacuum degree is 8.0×10 -4 ~2.5×10 -3 Within the range of Pa, then backfill argon with a purity of 99.999% to 0.5±0.05 atmospheres;

[0048] (2) Cut the prepared alloy master ingot i...

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Abstract

The invention provides a preparation method of a crystalline-amorphous aluminum-based composite material. The preparation method comprises the following steps: (1) respectively weighing high-purity elemental Al, Ni , Co, Y and La metals according to a mass ratio of 86:6.75:2.25:3.25:1.75, mixing the elemental metals, and melting the obtained mixture multiple times to obtain an alloy master ingot Al86Ni6.75Co2.25Y3.25La1.75, wherein mass fraction of every elemental metal is equal to or more than 99.99 wt.%; and (2) carrying out arc melting on the alloy master ingot in an argon atmosphere, and rapidly carrying out copper mold suction casting with a water-cooled copper mold as a cooling medium in order to obtain the crystalline-amorphous aluminum-based composite material. The cooling speed ofa suction molding process matched with the copper mold is 10<3> to 10<6> K/s, and the cooling rate of the upper part of the copper mold is lower than that of the lower part. The performances of the material can be controlled by the method, and the prepared composite material has excellent mechanical properties, has a room temperature compressive strength of 625-865 MPa, a breaking strength of 650-1000 MPa and a compressive plastic strain of 1.3-3.3%.

Description

technical field [0001] The invention relates to the field of preparation of cast aluminum alloys, in particular to a method for preparing a crystal-amorphous aluminum-based composite material. Background technique [0002] Aluminum alloy, as a lightweight structural material with high specific strength, accounts for an increasing proportion in the development of modern industry, especially in the fields of automobiles and aerospace, and has gradually become one of the basic materials to replace steel. With the continuous development of technology in this field, the requirements for structural materials, especially high-strength and high-toughness cast aluminum alloys are getting higher and higher. How to improve the mechanical properties of cast aluminum alloy structural materials has become one of the important research topics. So far, people have developed various methods to improve and enhance the mechanical properties of cast aluminum alloys, among which the preparation ...

Claims

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Application Information

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IPC IPC(8): C22C1/02C22C45/08C22C21/00
CPCC22C1/026C22C21/00C22C45/08C22C1/11
Inventor 宋凯凯张泽群薛其森刘旦段俊鹏王丽
Owner SHANDONG UNIV
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