Method for preparing CNTs (carbon nanotubes) reinforced high-entropy alloy laser deposition composite material

A technology of composite materials and high-entropy alloys, applied in metal material coating technology, additive processing, coating, etc., can solve the problems of poor high-temperature oxidation resistance and limit the application of titanium alloys, and achieve strong applicability, easy promotion and application, The effect of simple and convenient process

Active Publication Date: 2019-11-12
SHANDONG JIANZHU UNIV
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Problems solved by technology

Titanium alloys are widely used in the manufacture of aerospace parts due to their high strength, low density, and good corrosion resistance. However, their high-temperature oxidation properties are relatively poor, which greatly limits the application of titanium alloys.

Method used

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  • Method for preparing CNTs (carbon nanotubes) reinforced high-entropy alloy laser deposition composite material
  • Method for preparing CNTs (carbon nanotubes) reinforced high-entropy alloy laser deposition composite material
  • Method for preparing CNTs (carbon nanotubes) reinforced high-entropy alloy laser deposition composite material

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Embodiment 1

[0017] Cut the TA2 titanium alloy into a cuboid with a length of 10 mm, a width of 10 mm, and a thickness of 8 mm. Before the mixed powder deposition, the surface of the titanium alloy was cleaned, wiped and dried; the proportion (wt. %) was 87FeCoCrAlCu-10SiB 6 -3 (Ni / Ag-coated-CNTs) mixed powder LMD on the 10 mm × 10 mm surface of TA2 titanium alloy to form LMD coating.

[0018] Specific process steps:

[0019] 1) Before LMD, the surface of the TA2 titanium alloy to be treated is smoothed with 120-grit sandpaper to make it

[0020] The roughness of the surface to be treated reaches Ra 2.5 μm; then the surface is cleaned with 25% sulfuric acid aqueous solution by volume, and the pickling time is 5 to 10 minutes; after that, rinse with clean water, wipe clean the surface of the workpiece to be melted with alcohol, and dry it;

[0021] 2) Weigh 87 g of FeCoCrAlCu powder, SiB 6 Powder 10 g, single wall (Ni / Ag

[0022] Coating-CNTs) powder 3 g, put into a beaker, in which FeCo...

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Abstract

The invention discloses a method for preparing a CNTs (carbon nanotubes) reinforced high-entropy alloy laser deposition composite material. According to the method, FeCoCrAlCu-SiB6-(Ni/Ag coated-CNTs)mixed powder is deposited on the surface of a TA2 titanium alloy by laser melting with a coaxial powder feeding method in argon atmosphere, an LMD (laser metal deposition) coating is formed, the coating has bcc and fcc structures, hardness of the bcc structure is higher and toughness of the fcc structure is better; a large quantity of CNTs are attached to the surface of ceramic crystallization phase in the coating, growth of the crystallization phase can be effectively inhibited, the organization structure is refined, and therefore, the structure property of the prepared composite material isremarkably enhanced; a high-temperature oxidation test result indicates that high-temperature oxidation property of the CNTs reinforced LMD coating is obviously better than that of a FeCoCrAlCu-SiB6laser deposition layer and the TA2 titanium alloy base material without addition of CNTs. The CNTs reinforced high-entropy alloy laser deposition composite material with compact organization structureand good high-temperature oxidizability can be obtained.

Description

technical field [0001] The invention relates to a method for preparing a CNTs enhanced laser deposition composite material, which belongs to the technical field of material surface strengthening. In particular, it relates to a method for preparing CNTs-enhanced high-entropy alloy laser-deposited composite materials on the surface of titanium alloys by using laser melting deposition technology. Background technique [0002] Additive manufacturing is a technology that integrates computer-aided design and material processing, and uses CAD design data to quickly manufacture physical objects in a layer-by-layer manner. Compared with the traditional method of processing raw materials, additive manufacturing technology does not require tools, fixtures and multiple processing procedures, and solves many complex structural parts that were difficult to manufacture in the past, greatly shortening the processing cycle and saving production costs. Laser melting deposition (LMD) is an ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10B33Y10/00
CPCC23C24/103B33Y10/00
Inventor 李嘉宁苏沫林
Owner SHANDONG JIANZHU UNIV
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