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Graphene-reinforced nickel-based composite coating material and laser cladding technology thereof

A composite coating and laser cladding technology, which is applied in the field of material surface modification, can solve the problems of low dilution and poor anti-friction performance, and achieve a wide range of content changes, excellent wear resistance and anti-friction performance, and good metallurgical bonding Effect

Inactive Publication Date: 2013-03-13
DALIAN UNIV OF TECH
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Problems solved by technology

This type of alloy has good wear resistance, corrosion resistance and oxidation resistance. At the same time, it has good wetting performance with a variety of substrates, and it is easy to obtain a wear-resistant coating with low dilution and metallurgical bonding with the substrate. Poor performance; graphene is a planar film composed of carbon atoms in a hexagonal honeycomb lattice composed of SP3 hybrid orbitals

Method used

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  • Graphene-reinforced nickel-based composite coating material and laser cladding technology thereof
  • Graphene-reinforced nickel-based composite coating material and laser cladding technology thereof
  • Graphene-reinforced nickel-based composite coating material and laser cladding technology thereof

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Embodiment Construction

[0028] The technical solution of the present invention will be further described below in combination with specific embodiments.

[0029] Select Ni with a particle size of 45-180μm 65.8 Cr 15 B 3.0 Si 3.5 C 0.7 Fe 12 Nickel-based self-fluxing alloy powder is used as the matrix material of the cladding layer, and graphene with a particle size of 20nm is selected as the reinforcing phase, and its addition amount is 0.5-14 vol.%. Firstly, the composite powder is prepared according to the stoichiometric ratio. Then, use a ball mill to uniformly mix the prepared composite powder. The specific parameters during mixing are: ball mill speed 300rpm, mixing time 5h. Pre-place the composite powder on the surface of 300M steel (the thickness of the pre-set layer is 1mm), and use a 5KW cross-flow CO2 laser to perform multi-channel overlapping laser cladding under the protection of argon. The specific process parameters of laser cladding are: laser power 3.0KW, scanning speed 3.0mm / ...

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Abstract

The invention relates to a graphene-reinforced nickel-based composite coating material and a laser cladding technology thereof, belonging to the technical field of surface modification of materials. The graphene-reinforced nickel-based composite coating material is characterized in that a nickel-based self-fusing alloy is taken as a matrix material of a cladding layer, graphene in the percentage by volume of 0.5-20% is taken as a reinforcing phase, and then a composite coating with excellent wear resistance and anti-friction performance can be prepared on a steel and alloy matrix by utilizing the laser cladding technology. The graphene-reinforced nickel-based composite coating material disclosed by the invention has the advantages that the variation range of the content of the graphene is wide, and the coating has uniform and dense structure, excellent wear resistance and anti-friction performance and good metallurgical bonding with the matrix, and can meet the requirements of carbon steel and alloy steel members for friction and wear performance under different working conditions; and furthermore, the scale and the degree of automation of the preparation process of the coating are high, and the graphene-reinforced nickel-based composite coating material can be widely applied to aerospace, machinery, automobiles, military industry and other fields.

Description

technical field [0001] The invention belongs to the technical field of material surface modification. It provides a graphene-enhanced nickel-based composite coating material system and a corresponding laser cladding process. Background technique [0002] With the sharp increase in the speed and load of modern machinery and mechanisms, as well as the development of aerospace, military and nuclear energy technology, more stringent performance requirements are put forward for materials, and many working conditions are in the state of no oil lubrication or less oil lubrication. At this time, the material should not only have excellent wear resistance, but also have good anti-friction performance. Apparently, traditional alloy design ideas and techniques can no longer meet the above-mentioned purposes and uses. Since the friction and wear failure behaviors all originate from the surface of the part and gradually develop into the internal damage behavior, the advanced surface en...

Claims

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Application Information

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IPC IPC(8): C23C24/10C22C19/03
Inventor 王存山马超董星龙黄昊
Owner DALIAN UNIV OF TECH
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