A light metal matrix composite component and its preparation method

A composite material component and light metal technology, used in metal processing equipment, manufacturing tools, welding equipment, etc., can solve the problems of poor reinforcement effect, low production efficiency, and difficult processing, and achieve good deposition efficiency and less processing. , the effect of increasing strength

Active Publication Date: 2020-01-07
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a light metal matrix composite component and its preparation method to solve the problems of low production efficiency, difficult processing and poor reinforcement effect of existing light metal composite materials

Method used

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  • A light metal matrix composite component and its preparation method
  • A light metal matrix composite component and its preparation method

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preparation example Construction

[0035] Based on the preparation method of the present invention, the present invention provides figure 1 The structural schematic diagram of the preparation device shown, figure 2 Schematic diagram of the deposition process.

[0036] Such as figure 1 As shown, the device for preparing light metal matrix composite components of the present invention includes: a gas cylinder 1 , a welding machine 2 , a conduit 3 (bottom line), a powder feeder 4 , a welding torch 5 and a wire feeding device 6 . The gas cylinder 1, welding machine 2 and welding torch 5 are connected and arranged in a conventional manner through a conduit 3. The powder feeder 4 communicates with the feeder pipe 10 (arc shielding gas delivery pipeline) of the welding torch 5, and is used to send the particle reinforcement into the pipeline, and then blow it into the liquid molten pool under the action of inert gas. The wire feeding outlet of the wire feeding device 6 is located directly in front of the moving di...

Embodiment 1

[0039] The preparation method of the present embodiment comprises the following specific steps:

[0040] (1) Surface pretreatment: polish the surface of the light metal substrate to be deposited, remove the oil stain on the surface of the substrate, and then air dry;

[0041] (2) Preparation of composite welding wire: the light metal matrix and linear / flaky reinforcement are prepared by powder metallurgy, stirred casting or squeeze casting, and then the bulk material is extruded into a composite welding wire with a diameter of 0.5mm ; Wherein, the mass percentage of the linear / flaky reinforcements in the composite welding wire is 1%, and the linear / flaky reinforcements are carbon nanotubes and graphene;

[0042] (3) Arc additive manufacturing of tungsten inert gas shielded welding:

[0043] (31) Coaxial powder feeding: place the dried granular reinforcement in a powder feeder connected to the arc protection gas delivery pipeline, and the powder feeder delivers the granular re...

Embodiment 2

[0048] The preparation method of the present embodiment comprises the following specific steps:

[0049] (1) Surface pretreatment: polish the surface of the light metal substrate to be deposited, remove the oil stain on the surface of the substrate, and then air dry;

[0050] (2) Preparation of composite welding wire: prepare bulk material by powder metallurgy, stir casting or squeeze casting with light metal matrix and linear / flaky reinforcement, and then extrude the bulk material into a composite welding wire with a diameter of 4mm; Among them, the mass percentage of the linear / flaky reinforcement in the composite welding wire is 15%, the linear / flaky reinforcement is whisker and graphene, and the whisker is AlO, BeO, SiC or SiN;

[0051] (3) Arc additive manufacturing of tungsten inert gas shielded welding:

[0052] (31) Coaxial powder feeding: place the dried granular reinforcement in a powder feeder connected to the arc protection gas delivery pipeline, and the powder fe...

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Abstract

The invention discloses a light metal-based composite material component and a preparation method thereof, belonging to the technical field of metal composite material preparation and molding. The invention adopts the non-melting extremely inert gas shielded welding arc as the heat source to manufacture the light metal matrix composite material on the light metal substrate that has undergone surface pretreatment; the feeding method of the additive manufacturing includes: using the inert shielding gas The particle reinforcement is blown into the liquid molten pool along the axial direction of the non-melting pole welding gun to realize coaxial powder feeding, and at the same time, the composite welding wire containing one-dimensional / two-dimensional linear / sheet-shaped reinforcement is continuously sent to the liquid molten pool from the advancing side of the welding torch. The pool realizes side-axis wire feeding. The present invention can directly manufacture large-sized composite material components with complex structures, without subsequent processing or less processing, and realizes the integration of material preparation and molding; the use of hybrid reinforcements of different dimensions can achieve better mechanical properties of materials and reduce the cost of raw materials ; Few process parameters and easy to realize automatic intelligent manufacturing.

Description

technical field [0001] The invention relates to the technical field of metal composite material preparation, in particular to a light metal matrix composite material component and a preparation method thereof. Background technique [0002] After adding reinforcements such as fibers, whiskers or particles with high strength, high elastic modulus and high melting point to light metals such as magnesium, aluminum, titanium and their alloys to make composite materials, their mechanical properties are significantly improved, while retaining In addition to the original advantages of low density and good damping performance, it has excellent physical and mechanical properties such as higher specific strength, specific stiffness, high temperature resistance, wear resistance, lower thermal expansion coefficient, and better dimensional stability. The existing methods for preparing metal matrix composites mainly include powder metallurgy, stirred casting, liquid impregnation, squeeze c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/167B23K9/32
CPCB23K9/167B23K9/32
Inventor 权高峰郭阳阳任凌宝潘厚宏周明扬
Owner SOUTHWEST JIAOTONG UNIV
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