Microstructure, Wear Resistance and Corrosion Performance of Inconel 625 Layer Fabricated by Laser/Ultra-High Frequency (UHF) Induction Hybrid Deposition

In order to avoid microstructure degradation caused by low frequency induction heat in laser-induction hybrid deposition, this paper proposes a laser/ultra-high (UHF) deposition method. Microstructure observation is carried out reveal the effect of UHF on deposited layer. Results indicate that laser-UHF layer, under current density 1.14 × 108 A/m2, exhibits finer and fewer Laves phases than laser As increases from 1.01 A/m2 layer significantly refined; however, as further increases, only slightly refined, since enhanced thermal effect, along with increasing density, may help grain growth. Wear test demonstrates obtained 1.40 has lowest average friction coefficient 0.375 wear rate 15.53 10−5 mm3/N·m, indicating better resistance. Corrosion resistance also evaluated electrochemical corrosion test. addition improves Owing high ohm passive film, fabricated best Based analysis performance, an optimal parameter for Inconel 625