Abstract
The aim of this study was to improve the surface properties of a Ti-6Al-4V alloy using laser cladding with SiC nanopowders. In an argon environment laser cladding, the TiC and Ti<SUB>5</SUB>Si₃ reinforcement phases were generated, and the hardness of the coating layer was improved up to three times. Increasing the laser scanning speed further improved the hardness as the grain size decreased. However, the friction characteristics did not improve as the reinforcement phases on the surface fell off during sliding contact and caused wear and tear. In an air environment laser cladding, an increase in the hardness due to the reinforcement phases and an improvement of the friction characteristics due to the formation of the oxide phases were observed simultaneously. The coefficient of friction was reduced by up to 91%. In addition, the quantitative correlation between the friction coefficient and the oxygen content change on the coating surface was analyzed.
| Translated title of the contribution | Effect of Environmental Gas and Process Variables on Surface Properties of Laser-clad Ti-6Al-4V Alloy with SiC Nanopowders |
|---|---|
| Original language | Korean |
| Pages (from-to) | 28-36 |
| Number of pages | 9 |
| Journal | 한국생산제조학회지 |
| Volume | 31 |
| Issue number | 1 |
| DOIs | |
| State | Published - Feb 2022 |