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Method for preparing laser cladding coating by consolidating and pre-arranging blended carbon nano-tubes and metal nano-powder

A carbon nanotube and metal nanotechnology, which is applied in the fields of laser melting to obtain metal matrix composite material coatings and laser cladding coatings, which can solve the problem of limited dispersion of carbon nanotubes and failure to give full play to the nano-dispersion effect of mixed carbon nanotubes, etc. problems, to achieve the effect of reducing high stress, reducing defects, and ensuring utilization

Inactive Publication Date: 2016-03-09
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the selection of micron-scale metal Ti powder, the dispersion of carbon nanotubes is limited, and the nano-dispersion of mixed carbon nanotubes is not fully utilized.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Utilize the method of the present invention to realize the laser cladding coating method of consolidating preset carbon nanotube blended metal Ti nano powder, the specific implementation steps are as follows:

[0024] In the first step, the surface of the Ti alloy part is pretreated by cutting, and the surface of the pretreated Ti alloy is ultrasonically cleaned with acetone to remove surface oil.

[0025] In the second step, weigh 0.2g of carbon nanotubes and put them into a beaker with 600ml of deionized water for ultrasonic dispersion for 4 hours, then weigh 1.8g of metallic Ti nanopowder and add them to the beaker of dispersed carbon nanotubes, and continue ultrasonication for 4 hours to achieve Blending of carbon nanotubes and Ti nanopowders.

[0026] The third step is to heat and stir the blended carbon nanotube and metal Ti nanopowder aqueous solution in a constant temperature water bath at 85°C for 8 hours, evaporate to a sticky state, and heat and dry the stick...

Embodiment 2

[0030] Utilize the method of the present invention to realize the laser cladding coating method of consolidating the prefabricated carbon nanotube blended metal W nanopowder, the specific implementation steps are as follows:

[0031] The first step is to pre-treat the surface of the stainless steel parts by shot peening, and ultrasonically clean the pre-treated stainless steel surface with ethanol to remove surface oil.

[0032] In the second step, weigh 1g of carbon nanotubes and place them in a container containing 2500ml of deionized water for ultrasonic dispersion for 10 hours, then weigh 4g of metal W nanopowder and add them to the container for dispersing carbon nanotubes, and continue ultrasonication for 10 hours to realize carbon nanotubes. Blending of tubes with W nanopowders.

[0033] The third step is to heat and stir the blended carbon nanotube and metal W nanopowder aqueous solution in a constant temperature water bath at 75°C for 10 hours, evaporate to a sticky s...

Embodiment 3

[0037] Utilize the method of the present invention to realize the laser cladding coating method of consolidating the prefabricated carbon nanotube blend metal Ni and Ti composite nanopowder, the specific implementation steps are as follows:

[0038] In the first step, the surface of the Al alloy part is pretreated by electric discharge machining, and the surface of the pretreated Al alloy is ultrasonically cleaned with acetone to remove surface oil.

[0039] In the second step, weigh 0.4g of carbon nanotubes and put them into a beaker filled with 1000ml of deionized water for ultrasonic dispersion for 5h, then weigh 3.6g of metal Ni and Ti composite nanopowder into the beaker of dispersed carbon nanotubes, and continue ultrasonication 6h, realizing the blending of carbon nanotubes and Ni and Ti composite nanopowders.

[0040] The third step is to heat and stir the blended carbon nanotubes and metal Ni and Ti composite nanopowder aqueous solution in a constant temperature water...

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Abstract

The invention relates to a method for preparing a laser cladding coating by consolidating and pre-arranging blended carbon nano-tubes and metal nano-powder and belongs to the field of material surface engineering. The method includes the followings steps that the part surface is pretreated through cutting, electrosparking or sand blasting and the like; the carbon nano-tubes are dispersed in an ultrasonic manner in deionized water, and then one or more metal nano-powder is blended with the nano-tubes in an ultrasonic manner; a blended nano-powder water solution is stirred and evaporated at the constant temperature till the blended nano-powder is pasty, and then the pasty blended nano-powder is heated and dried to be made into blended powder; the blended powder is mechanically pressed to be consolidated and pre-arranged on the part surface to be scanned and heated through lasers under the nitrogen or argon and other protective atmospheres, metallurgical bonding of the part surface and the consolidating and pre-arranging layer is achieved, and the laser cladding coating is obtained. The method has the advantages that the carbon nano-tubes and the metal nano-powder are evenly blended; bonding of the self-adhesive blended powder and a part base body is enhanced due to the self-adhesive blended powder; and the cladding coating defect is lowered remarkably.

Description

technical field [0001] The invention relates to a laser cladding coating method for consolidating pre-prepared carbon nanotubes blended with metal nano-powders, in particular to a self-adhesive mixture of pre-prepared carbon nanotubes and metal nano-powders mechanically pressed and consolidated on the surface of parts , a method for obtaining a metal matrix composite material coating by laser melting, which belongs to the field of material surface engineering. Background technique [0002] Laser cladding technology is a rapid scanning and heating coating of powder materials and the surface of parts by high-power laser beams to form a coating technology that has a metallurgical bond with the parts matrix. Laser cladding coating can effectively improve the friction and wear resistance, corrosion resistance and high temperature oxidation resistance of parts. There are two main ways to introduce coating powder materials for laser cladding coatings: synchronous powder feeding me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00C23C24/10
Inventor 雷明凯李昱鹏王桂芹朱小鹏潘学民
Owner DALIAN UNIV OF TECH
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