Heat Treatment of Metals ›› 2024, Vol. 49 ›› Issue (7): 173-180.DOI: 10.13251/j.issn.0254-6051.2024.07.027

• SURFACE ENGINEERING • Previous Articles     Next Articles

Influence of Y2O3 addition on microstructure and wear resistance of ultra-high-speed laser-clad IN718 alloy coatings

Li Rui   

  1. School of Intelligent Manufacturing, Xinxiang Institute of Vocational Technology, Xinxiang Henan 453000, China
  • Received:2024-03-11 Revised:2024-05-14 Online:2024-07-25 Published:2024-08-29

Abstract: IN718 alloy composite coatings with Y2O3 addition were prepared by ultra-high-speed laser-cladding technology. The effect of Y2O3 addition on coating microstructure and morphology, phase composition, hardness and wear resistance was analyzed. The results show that the addition of Y2O3 reduces the pore defects in the coating and forms a dense and refined grain. The hardness of the coatings is the highest when Y2O3 content is 1.0% which average value is 380.2 HV0.1, meanwhile, it has superior wear resistance with the friction coefficient of 0.66 and the wear rate of 5.03×10-4 mm3/(N·m), and the wear mechanism is combined of abrasive wear, adhesive wear and oxidative wear. The dispersed Y2O3 in the coatings forms nucleation point, resulting in the refinement of grains and improvement of hardness and wear resistance.

Key words: ultra-high-speed laser cladding, IN718 alloy, Y2O3 content, microstructure and morphology, wear resistance

CLC Number: