Ceramic enhanced type nickel-based composite coating and preparation method thereof

A composite coating and reinforced technology, applied in the direction of coating, metal material coating process, etc., can solve the problems of pores and cracks, reduce the corrosion resistance of the coating, incomplete structure, etc., and achieve complete structure and high spreadability. , the effect of improving organizational integrity

Inactive Publication Date: 2018-09-07
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the current laser cladding research, metal-based alloy powders are widely used as cladding materials, but the use of metal alloy powders, due to the compactness of powder particles and the instability of the laser cladding process, is prone to occur during the cladding process. Pores and cracks, resulting in incomplete organization and reducing the corrosion resistance of the coating

Method used

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  • Ceramic enhanced type nickel-based composite coating and preparation method thereof
  • Ceramic enhanced type nickel-based composite coating and preparation method thereof
  • Ceramic enhanced type nickel-based composite coating and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0051] After grinding the 316L stainless steel plate with sandpaper, wash it with acetone and dry it. As the base material, fix it on the workbench. Use TiC powder and Inconel 625 alloy welding wire as the cladding material. The composition of the Inconel 625 alloy welding wire is Cr 20 %, Ni 62%, Mo 8%, Nb 4%, Mn 0.3%, Co 0.2%, Si 0.5% and Fe 5%. Pre-place the TiC powder in the powder feeder, adjust the angle of the powder feed gun to be 45° from the horizontal plane, the top of the powder feed gun is the same as the wire outlet of the wire feed gun, and the height is 3-5mm from the surface of the substrate to ensure that the powder feed position is in line with the feed The silk position is the light spot. The placement of the cladding material and the base material is as follows: figure 1 shown.

[0052] The welding process adopts argon protective atmosphere, the gas flow rate is 5L / min, the laser melting is completed by laser surface focusing, the laser and powder feeder...

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Abstract

The invention provides a ceramic enhanced type nickel-based composite coating and a preparation method thereof. A non-powdery nickel alloy containing raw material and ceramic powder are melted and deposited on a matrix material and the ceramic enhanced type nickel-based composite coating is formed on the matrix material, wherein the mass percent content of nickel in the non-powdery nickel alloy containing raw material is greater than or equal to 30 percent. According to the method provided by the invention, the non-powdery nickel alloy containing raw material and the ceramic powder are adoptedin a melting and depositing process; laser melted conventional raw material alloy powder is avoided, and furthermore, a phenomenon that incomplete tissues are caused by air pores and cracks are easily generated in the melting and depositing process so that the corrosion resistance of the coating is reduced is avoided. A result of the embodiment provided by the invention shows that the composite coating obtained according to the technical scheme has no cracks and pores and has complete tissues.

Description

technical field [0001] The invention belongs to the technical field of composite coatings, in particular to a ceramic reinforced nickel-based composite coating and a preparation method thereof. Background technique [0002] Laser cladding technology adds cladding materials on the surface of the substrate, and uses a high-energy-density laser beam to melt it together with the thin layer on the substrate surface, forming a cladding surface coating that is metallurgically bonded to the substrate on the surface of the substrate. A surface modification technology with the advantages of high energy density, low heat input, and fast cooling rate has been widely used in the aerospace field. [0003] In the current laser cladding research, metal-based alloy powders are widely used as cladding materials, but the use of metal alloy powders, due to the compactness of powder particles and the instability of the laser cladding process, is prone to occur during the cladding process. Pores...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10
CPCC23C24/103
Inventor 王春明许翔米高阳蒋平
Owner HUAZHONG UNIV OF SCI & TECH
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