Effect of laser power on microstructure and tribological behavior of laser clad NiCr coating

Sun Chengwen; Li Wei; Kong Dejun

doi:10.1515/ijmr-2022-0498

Article

Effect of laser power on microstructure and tribological behavior of laser clad NiCr coating

Sun Chengwen , Li Wei and Kong Dejun

Published/Copyright: November 9, 2023

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From the journal International Journal of Materials Research Volume 114 Issue 12

Abstract

NiCr coatings were prepared on H13 steel by laser cladding with different laser power. The microstructure and phases of the obtained coatings were analyzed using a super depth of field microscope and X-ray diffraction, respectively, and the effect of laser power on the friction–wear performance at high-temperature was investigated using a friction tester. The results show that the laser clad NiCr coatings fabricated at the different laser powers are composed of Cr₂Ni₃ and FeNi₃ phases, and the porosity is decreased from 1.28 % to 0.48 % with the increase of laser power. The average coefficients of friction of NiCr coatings are decreased with the increase of laser power, and the wear rate of NiCr coating fabricated at the laser power of 1400 W power is the lowest among the three kinds of coatings, showing that the suitable laser power can improve the surface quality and wear resistance of NiCr coating.

Keywords: Laser power; Laser cladding; NiCr coating; Coefficient of friction; Wear rate

Corresponding author: Kong Dejun, School of Mechanical Engineering, Changzhou University, Changzhou 213164, P.R. China, E-mail: kong-dejun@163.com

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Received: 2022-12-15

Accepted: 2023-03-29

Published Online: 2023-11-09

Published in Print: 2023-12-27

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Articles in the same Issue

https://doi.org/10.1515/ijmr-2022-0498

Keywords for this article

Laser power; Laser cladding; NiCr coating; Coefficient of friction; Wear rate