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Aluminum-lithium-matrix composite material powder as well as preparation method and application thereof

A composite material and powder technology, which is applied in the field of lightweight, high-strength, high-modulus nanoparticle-reinforced aluminum-lithium-based composite powder and its preparation, can solve problems such as poor fluidity, high laser reflectivity, and large thermal conductivity, and achieve improved laser performance. Absorption rate, huge application prospect, effect of microstructure refinement

Active Publication Date: 2018-12-14
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the research and application of laser additive manufacturing in stainless steel, titanium alloys and high-temperature alloys has become increasingly mature. However, aluminum and its alloys have the characteristics of poor fluidity, high laser reflectivity, high thermal conductivity, and easy oxidation. It brings great difficulties to the forming process, and the types of alloy powders available are limited, which greatly limits the development of aluminum matrix composites in the field of additive manufacturing

Method used

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  • Aluminum-lithium-matrix composite material powder as well as preparation method and application thereof

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Effect test

Embodiment 1

[0032] This embodiment provides an aluminum-lithium-based composite material powder and a preparation method thereof. The specific preparation methods include:

[0033] Pure aluminum, Al-Cu master alloy, Al-Zr master alloy, Al-Sc master alloy, Al-Mg master alloy, pure Li or Al-Li master alloy, KBF 4 and K 2 TiF 6 In situ self-generated 5wt.%TiB 2 Reinforced Al-3Li-1.5Cu-0.2Zr-0.5Mg-0.2Sc-0.1Cd composites. Put the high-purity aluminum ingot into the crucible and melt it, then sprinkle it with JZF-03 high-temperature covering agent; 2 TiF 6 、KBF 4 Mix evenly according to the mass ratio of 2:1, dry and add to the aluminum liquid; after the reaction is complete, remove the reaction by-products, and then add Al-Cu master alloy, Al-12Zr master alloy, Al-Sc master alloy, Al- Mg master alloy, Al-Cd master alloy, add pure Li or Al-Li master alloy under the protection of argon, then add JZJ type harmless aluminum alloy refining agent to the melt for degassing and refining, at 740...

Embodiment 2

[0036] This embodiment provides an aluminum-lithium-based composite material powder and a preparation method thereof. The specific preparation methods include:

[0037] Pure aluminum, Al-Cu master alloy, Al-Zr master alloy, Al-Sc master alloy, Al-Mg master alloy, Al-Cd master alloy, pure Li or Al-Li master alloy, KBF 4 and K 2 TiF 6 In situ self-generated 5wt.%TiB 2 Reinforced Al-3Li-1.5Cu-0.2Zr-0.5Mg-0.2Sc-0.2Cd composites. Put the high-purity aluminum ingot into the crucible and melt it, then sprinkle it with JZF-03 high-temperature covering agent; 2 TiF 6 、KBF 4 Mix evenly according to the mass ratio of 2:1, dry and add to the aluminum liquid; after the reaction is complete, remove the reaction by-products, and then add Al-Cu master alloy, Al-12Zr master alloy, Al-Sc master alloy, Al- Mg master alloy, Al-Cd master alloy, add pure Li or Al-Li master alloy under the protection of argon, then add JZJ type harmless aluminum alloy refining agent to the melt for degassing an...

Embodiment 3

[0040] This embodiment provides an aluminum-lithium-based composite material powder and a preparation method thereof. The specific preparation methods include:

[0041] Pure aluminum, Al-Cu master alloy, Al-Zr master alloy, Al-Sc master alloy, Al-Mg master alloy, Al-Cd master alloy, pure Li or Al-Li master alloy, KBF 4 and K 2 TiF 6 In situ self-generated 10wt.%TiB 2 Reinforced Al-3Li-1.5Cu-0.2Zr-0.4Mg-0.15Sc-0.2Cd composites. Put the high-purity aluminum ingot into the crucible and melt it, then sprinkle it with JZF-03 high-temperature covering agent; 2 TiF 6 、KBF 4 Mix evenly according to the mass ratio of 2:1, dry and add to the aluminum liquid; after the reaction is complete, remove the reaction by-products, and then add Al-Cu master alloy, Al-12Zr master alloy, Al-Sc master alloy, Al- Mg master alloy, Al-Cd master alloy, add pure Li or Al-Li master alloy under the protection of argon, then add JZJ type harmless aluminum alloy refining agent to the melt for degassin...

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Abstract

The invention provides an aluminum-lithium-matrix composite material powder as well as a preparation method and an application thereof. The aluminum-lithium-matrix composite material powder comprisesa matrix alloy and reinforced phases distributed into the matrix alloy, wherein the matrix alloy comprises 2.5%-3.5% of Li, 1%-2% of Cu, 0.1%-0.2% of Zr, 0.4%-0.5% of Mg, 0.15%-0.2% of Sc, 0.1%-0.2% of Cd and the balance Al; and the reinforced phases are TiB2 particles. The preparation method comprises the following steps: taking pure aluminum, pure Li or Al-Li intermediate alloy, Al-Cu intermediate alloy, Al-Zr intermediate alloy, Al-Sc intermediate alloy, Al-Mg intermediate alloy, Al-Cd intermediate alloy and TiB2 / Al base metal as raw materials, and preparing an intermediate melt; carrying out gas atomization on the intermediate melt to prepare a composite material powder; and finally carrying out uniform heat treatment to obtain the aluminum-lithium-matrix composite material powder. Thealuminum-lithium alloy powder prepared by the preparation method is higher in laser absorption rate, and more applicable to a laser additive manufacturing technology.

Description

technical field [0001] The invention belongs to the technical field of material powder preparation, and relates to an aluminum-lithium-based composite material powder and its preparation method and application, in particular to a light-weight, high-strength, high-modulus nanoparticle-reinforced aluminum-lithium-based composite material powder and its preparation method and application. Background technique [0002] High-tech fields such as aerospace, national defense and military industry have increasingly stringent requirements on the mechanical properties of materials, not only requiring high strength and high plasticity, but also high specific stiffness and specific modulus, resulting in large, complex and precise The demand for lightweight, high-strength and high-modulus material components is becoming more and more urgent. [0003] Aluminum-lithium alloys have attracted extensive attention and applications due to their low density, high modulus, and high specific proper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C32/00C22C1/10B22F9/08B22F1/00B22F3/105B33Y70/00
CPCB22F1/0003C22C1/1036C22C21/00C22C32/0073B22F9/082B33Y70/00B22F10/00B22F1/142B22F10/34B22F10/20Y02P10/25
Inventor 李险峰吴量吴一赵博文马乃恒王浩伟
Owner SHANGHAI JIAO TONG UNIV
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