Effect of Ti₃SiC₂ mass fraction on microstructure and tribological performance of laser cladded NiCr coating at high temperature

Abstract

Purpose

This paper aims to investigate the effect of Ti₃SiC₂ on the high-temperature tribological behaviors of NiCr coating, which was beneficial to improve the friction-wear performance of hot work mold.

Design/methodology/approach

NiCr-Ti₃SiC₂ coatings were prepared on H13 steel substrate by laser cladding. The microstructure, phases and hardness of obtained coatings were analyzed using a super-depth of field microscope, X-ray diffraction and microhardness tester, respectively, and the tribological performance of obtained coatings at 500°C was investigated using a high-temperature tester.

Findings

The results show the NiCr-Ti₃SiC₂ coatings are comprised of γ-Ni solid, solution, Ti_xNi_y, TiC and Ti₃SiC₂ phases, and the coating hardness is increased with the increase of Ti₃SiC₂ mass fraction, which is contributed to the fine-grain and dispersion strengthening effect by the addition of Ti₃SiC₂. The NiCr-Ti₃SiC₂ coatings present excellent friction reduction and wear resistance by the synergetic action of Ti₃SiC₂ lubricant and hard phase, and the wear mechanism is predominated by abrasive wear and oxidation wear.

Originality/value

Ti₃SiC₂ phase was used to reinforce the tribological performance of H13 steel at high temperature, and the roles of friction reduction and wear resistance were discussed.

Peer review

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-01-2023-0004/

Citation

Chengwen, S., Wei, L. and Dejun, K. (2023), "Effect of Ti₃SiC₂ mass fraction on microstructure and tribological performance of laser cladded NiCr coating at high temperature", Industrial Lubrication and Tribology, Vol. 75 No. 4, pp. 398-405. https://doi.org/10.1108/ILT-01-2023-0004