Effect of remelting current on microstructure of deposited metal with ERNiCrFe-13 nickel alloy wire

Effect of remelting current on microstructure of remelting spot without feeding wire on deposited metal with experimental ERNiCrFe-13 nickel alloy wire was investigated by OM, SEM, EDS, JMatPro software, ImagePro software etc. Results indicated that weld width, penetration, SDAS (λ₂) increased with increasing remelting current, the relationship between remelting current and SDAS conforms to λ₂ = 0.682 I^1/3, correlation coefficient R² = 0.95. The average and maximum area of correlation coefficient γ/Laves eutectic microstructure increased with remelting current. With dendrite coarsening, γ/Laves eutectic microstructure number decreased. Solidification cracking exacerbate with increasing remelting current owing to the coupled effect of both enlarged γ/Laves eutectic microstructure and increasing strain.