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Preparation method for preparing aluminum-based composite material based on laser selective melting

A technology of laser selective melting and aluminum-based composite materials, which is applied in the field of metallurgy and metal technology, can solve the problems of material stress concentration and cracking, and achieve the effects of reducing thermal stress, broad application prospects, and particle distribution and dispersion

Inactive Publication Date: 2018-07-27
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the AlSi10Mg prepared by the traditional casting process needs subsequent T6 heat treatment to improve the mechanical properties of the material, and during the solution treatment, quenching will lead to stress concentration or even cracking of the material

Method used

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  • Preparation method for preparing aluminum-based composite material based on laser selective melting
  • Preparation method for preparing aluminum-based composite material based on laser selective melting
  • Preparation method for preparing aluminum-based composite material based on laser selective melting

Examples

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Effect test

Embodiment 1

[0028] This embodiment relates to a method for preparing an aluminum-based composite material based on laser selective melting, which includes the following steps:

[0029] (1) in KBF 4 、K 2 TiF 6 The powder is used as the raw material, and the in-situ self-generated 6wt% TiB is prepared by the mixed salt reaction method (LSM) 2 / AlSi10Mg composite material, and the composite material powder is prepared by vacuum atomization technology, and the powder with a particle size of 15-53 μm is left after sieving, such as figure 1 shown;

[0030] (2) The composite material powder is prepared by selective laser melting to obtain an SLM sample, such as figure 2 As shown, the microstructure of the image 3 As shown, the laser power used is 300W, the scanning speed is 1000mm / s, and the layer thickness is 30μm; the first to fifth layers are printed by manual scanning for 2 to 3 times to enhance the bonding force between cladding layers;

[0031] (3) Single-aging treatment is perform...

Embodiment 2

[0034] This embodiment relates to a method for preparing an aluminum-based composite material based on laser selective melting, which includes the following steps:

[0035] (1) in KBF 4 、K 2 TiF 6 The powder is used as the raw material, and the in-situ self-generated 6wt% TiB is prepared by the mixed salt reaction method (LSM) 2 / AlSi10Mg composite material, and the composite material powder is prepared by vacuum atomization technology, and the powder with a particle size of 15-53 μm is left after sieving;

[0036] (2) The composite material powder is prepared by selective laser melting to obtain SLM samples, the laser power used is 300W, the scanning speed is 1000mm / s, and the layer thickness is 30μm; the first to fifth layers are printed by manual scanning for 2 to 3 times way to enhance the bonding force between cladding layers;

[0037] (3) Single-aging treatment is performed on the SLM sample, and the aging temperature used is 150° C. for 6 hours.

[0038] In this ex...

Embodiment 3

[0040] This embodiment relates to a method for preparing an aluminum-based composite material based on laser selective melting, which includes the following steps:

[0041] (1) in KBF 4 、K 2 TiF 6 The powder is used as the raw material, and the in-situ self-generated 6wt% TiB is prepared by the mixed salt reaction method (LSM) 2 / AlSi10Mg composite material, and the composite material powder is prepared by vacuum atomization technology, and the powder with a particle size of 15-53 μm is left after sieving;

[0042] (2) The composite material powder is prepared by selective laser melting to obtain SLM samples, the laser power used is 300W, the scanning speed is 1000mm / s, and the layer thickness is 30μm; the first to fifth layers are printed by manual scanning for 2 to 3 times way to enhance the bonding force between cladding layers;

[0043] (3) Perform single aging treatment on the SLM sample, the aging temperature used is 150°C, and the time is 24h.

[0044] In this exam...

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Abstract

The invention provides a preparation method for preparing an aluminum-based composite material based on laser selective melting. The preparation method comprises the following steps: S1, with KBF4 andK2TiF6 powders as raw materials, an in-situ self-generated TiB2 / AlSi10Mg composite material is prepared by a mixed salt reaction method (LSM), and a composite material powder is prepared by vacuum gas atomization of the in-situ self-generated TiB2 / AlSi10Mg composite material; S2, an SLM sample is prepared by laser selective melting of the composite material powder; and S3, the SLM sample is subjected to single aging treatment. The in-situ self-generated TiB2 particle reinforced AlSi10Mg composite material is prepared by the SLM, crystal grains are greatly refined, the mechanical properties ofthe material are further improved by the single aging treatment, and the composite material has great potential in the technical field of aviation and aerospace.

Description

technical field [0001] The present invention relates to the field of metallurgy and metal technology, in particular to a method for preparing aluminum-based composite materials based on laser selective melting, more specifically to a method for preparing in-situ self-generated TiB based on laser selective melting (SLM) 2 Process for Particle Reinforced AlSi10Mg Composites. Background technique [0002] In recent years, AlSi10Mg composite materials have been widely used in aerospace, automated production and other fields due to their low density, good fluidity, and excellent comprehensive mechanical properties. Among them, in situ self-generated aluminum-based composites generate reinforcement phases inside the matrix through self-generated reactions, which can effectively solve the problems of poor interface bonding and particle surface contamination caused by traditional composite materials plus reinforcements, and further improve the mechanical properties of composite mate...

Claims

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Application Information

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IPC IPC(8): C22C21/02C22C21/00C22C32/00C22C1/10B22F9/08B22F3/105
CPCC22C1/10C22C21/00C22C21/02C22C32/0073B22F9/082B22F10/00B22F10/36B22F10/28B22F10/64C22C1/1089Y02P10/25
Inventor 廉清吴一陈哲章敏立张暘李险峰王浩伟
Owner SHANGHAI JIAO TONG UNIV
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