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Aluminum-based composite material powder for laser reinforcement manufacturing and preparation method thereof

An aluminum-based composite material and laser additive technology, applied in the field of materials, can solve the problems of high residual stress cracks and holes, insufficient reliability, and high cost, and achieve the effect of improving the laser absorption rate, expanding the scope of application, and improving the strength of the material.

Inactive Publication Date: 2018-08-07
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, parts prepared by laser additive manufacturing usually have high residual stress and defects such as micron-level cracks and holes, which lead to a decrease in fatigue strength, plasticity and toughness of the material.
Therefore, the production yield of parts is low, the reliability is insufficient and the cost remains high
Therefore, traditional commercial alloy powders cannot fully meet the requirements for the manufacture of high-performance components.

Method used

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  • Aluminum-based composite material powder for laser reinforcement manufacturing and preparation method thereof
  • Aluminum-based composite material powder for laser reinforcement manufacturing and preparation method thereof

Examples

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Effect test

Embodiment 1

[0042] This embodiment provides an aluminum-based composite material powder for laser additive manufacturing, and its preparation method includes:

[0043] With high purity Al, industrial pure Mg, Al-12Zr master alloy, KBF 4 And K 2 TiF 6 Prepared 5wt.% TiB in situ for raw materials 2 Reinforce Al-2.2Mg-0.1Zr composite material. Put the high-purity Al in a crucible to melt and heat it to 780℃, and cover it with JZF-03 high-temperature covering agent; put KBF 4 , K 2 TiF 6 After mixing uniformly according to the mass ratio of 1:2, adding to the melt obtained in the previous step after drying; after the reaction is over, take out the reaction by-products, add Al-12Zr master alloy and industrial pure Mg in turn, and add JZJ to the melt Type harmless aluminum alloy refining agent for degassing refining, standing at 750°C for 15 minutes, and then making powder through a gas atomization device. The above-mentioned Al-2.2Mg-0.1Zr means that the mass fraction of Mg is 2.2%, the mass frac...

Embodiment 2

[0047] This embodiment provides an aluminum-based composite material powder for laser additive manufacturing, and its preparation method includes:

[0048] With high purity Al, industrial pure Mg, Al-12Zr master alloy, KBF 4 And K 2 TiF 6 Prepared 5wt.% TiB in situ for raw materials 2 Reinforce Al-2.2Mg-0.09Zr composite material. Put the high-purity Al in a crucible to melt and heat it to 780℃, and cover it with JZF-03 high-temperature covering agent; put KBF 4 , K 2 TiF 6 After mixing uniformly according to the mass ratio of 1:2, adding to the melt obtained in the previous step after drying; after the reaction is over, take out the reaction by-products, add Al-12Zr master alloy and industrial pure Mg in turn, and add JZJ to the melt Type harmless aluminum alloy refining agent for degassing refining, standing at 750°C for 15 minutes, and then making powder through a gas atomization device. The gas atomization device is the same as in Example 1, and its gas atomization process is ...

Embodiment 3

[0051] This embodiment provides an aluminum-based composite material powder for laser additive manufacturing, and its preparation method includes:

[0052] With high purity Al, industrial pure Mg, Al-12Zr master alloy, KBF 4 And K 2 TiF 6 Prepared 5wt.% TiB in situ for raw materials 2 Reinforce Al-2.2Mg-0.09Zr composite material. Put the high-purity Al in a crucible to melt and heat it to 780℃, and cover it with JZF-03 high-temperature covering agent; put KBF 4 , K 2 TiF 6 After mixing uniformly according to the mass ratio of 1:2, adding to the melt obtained in the previous step after drying; after the reaction is over, take out the reaction by-products, add Al-12Zr master alloy and industrial pure Mg in turn, and add JZJ to the melt Type harmless aluminum alloy refining agent for degassing refining, standing at 750°C for 15 minutes, and then making powder through a gas atomization device. The aerosolization device is the same as in Example 1. The gas atomization process is as f...

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Abstract

The invention provides a preparation method of aluminum-based composite material powder for laser reinforcement manufacturing. The preparation method comprises the following steps that pure aluminum,Al-Zr intermediate alloy, Al-Sc intermediate alloy, Al-Mn intermediate alloy, Al-Ti intermediate alloy, industrial pure Mg, KBF4 and K2TiF6 are used as raw materials. In-situ TiB2 micro-nanoparticle reinforced Al-Mg composite materials are prepared by in-situ melt self-control method, and TiB2 particle reinforced aluminum-based composite material powders are prepared by high temperature gas atomization. The median particle size of the powder particles is controllable in the range of 3-180[mu]m, the spherical rate is more than 90%, the powder yield is more than or equal to 60%, and the laser absorption rate is more than or equal to 45%. Nano-sized TiB2 particles are uniformly dispersed in the aluminum alloy matrix, and the grain structure of the composite material is uniform and fine equiaxed grains. The aluminum-based composite material powder has good laser absorptivity, is suitable for laser reinforcement manufacturing technology and can exhibit good mechanical properties when used in laser reinforcement manufacturing.

Description

Technical field [0001] The invention belongs to the technical field of materials, and specifically relates to an aluminum-based composite material powder for laser additive manufacturing and a preparation method thereof. Background technique [0002] With the development of modern science and technology, manufacturing frontiers represented by high-end fields such as aerospace and weapon manufacturing have put forward more and more stringent requirements on material performance and preparation technology: structural materials have high specific stiffness and specific modulus. It must have high strength and high plasticity. High-end equipment, such as large aircraft, puts forward more and more urgent needs for large, precise, complex overall lightweight, high-strength and tough alloy components to meet their requirements for high performance, high reliability, high economy and high environmental protection. . Laser additive manufacturing technology can effectively take into accou...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F9/08C22C21/06C22C32/00B33Y70/00
CPCB22F1/0003B22F9/082B33Y70/00C22C21/06C22C32/0073
Inventor 吴一陈哲廉清陈东王浩伟
Owner SHANGHAI JIAO TONG UNIV
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