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The Influence of Power on Microstructure and Properties of Laser Cladding Al-TiC-CeO2 Composite Coatings
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Affiliation:

1.School of Materials Science and Engineering, Changzhou University;2.Jiangsu Key Laboratory of Materials Surface Science and Technology

Clc Number:

TG174.44

Fund Project:

The Key Research and Development Project of Jiangsu Province (BE2016052)

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    Abstract:

    Al-TiC-CeO2 composite coatings were prepared by laser cladding technique. and the coating structures were investigated by SEM and XRD.The effects of different laser powers on the properties of Al-TiC-CeO2 composite coating have been studied by smicro-hardness tester,X-ray stress measurement instrument, friction and wear test machine and electrochemical workstation. The results show that Al-Fe phase appears in the coatings with different powers and shows a good metallurgical bond with the matrix. With the increase of the laser power, the coating dilution rate gradually increases, the coating is transformed from massive and short rod-like structure into fine granular structure,and fine grain strengthening effect is obvious, the coating composition of the organization more evenly distributed.In addition, with the increase of laser power, the microhardness and wear resistance of the coating surface first decrease and then increase, the residual stress of the coating surface are tensile stress, and the crack size increases with the increase of the stress. When the power is 1.6 KW, the coating showed high corrosion resistance.

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[HeXing, Kong Dejun, Song Renguo. The Influence of Power on Microstructure and Properties of Laser Cladding Al-TiC-CeO2 Composite Coatings[J]. Rare Metal Materials and Engineering,2019,48(11):3634~3642.]
DOI:10.12442/j. issn.1002-185X.20180423

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History
  • Received:April 25,2018
  • Revised:August 21,2018
  • Adopted:August 30,2018
  • Online: December 10,2019
  • Published: