Light metal matrix composite component and preparation method thereof

A composite material component, light metal technology, applied in metal processing equipment, manufacturing tools, welding equipment, etc., can solve the problems of poor reinforcement effect, high processing difficulty, low production efficiency, etc., and achieve good deposition efficiency and less processing volume. , the effect of stable combustion

Active Publication Date: 2018-11-13
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 t

Method used

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  • Light metal matrix composite component and preparation method thereof
  • Light metal matrix composite component and preparation method thereof

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preparation example Construction

[0035] Based on the preparation method of the present invention, the present invention provides figure 1 The schematic diagram of the structure 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 feed 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 mov...

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 matrix composite component and a preparation method thereof and belongs to the technical field of metal composite preparation and molding. According to the lightmetal matrix composite component and the preparation method thereof, the non-melt electrode inert gas shielded arc welding electric arc is adopted as a heat source to conduct material additive manufacturing on a light metal base plate subjected to surface pretreatment to obtain the light metal matrix composite component. A feeding method for material additive manufacturing comprises the steps of blowing zero-dimensional particle reinforcements into a liquid-state molten pool in the axial direction of a non-melt electrode welding gun through inert shielding gas to achieve coaxial powder feeding; and meanwhile, continuously feeding combined welding wires containing one-dimensional/two-dimensional linear/flaky reinforcements from the advancing side of the welding gun to the liquid-state molten pool to achieve paraxial wire feeding. Through the preparation method, the big-size composite component with the complex structure can be directly manufactured without subsequent processing or withlittle processing amount, and integration of material preparation and molding is realized. By adopting mixed reinforcements with different dimensions, the more superior mechanical properties of the material can be realized, the raw material cost is reduced, technological parameters are fewer, and automatic and intelligent manufacturing can be achieved easily.

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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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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