Overlay Welding on Titanium and 304 Stainless Steel Using ERNiCu-7 Filler Metal by GTAW Process

Abstract:

Single pass overlay welding of the ERNiCu-7 filler metal on the commercial pure titanium grade 2 and the 304 stainless steel using the gas tungsten arc welding (GTAW) process was studied. The ERNiCu-7 filler metal was overlay welded on the base metals with varying welding currents; it was 30A, 40A and 50A for the CP-Ti base metal and 50A, 60A and 70A for the 304SS base metal. The experimental results showed that the overlay CP-Ti welded-specimen, increasing of welding current increased bead width and decreased depth of penetration of weldment. While for the 304SS welded-specimen, increasing of welding current increased both bead width and depth of penetration. Suitable heat inputs to achieve good geometry of weldment for overlay welding were 348J/mm for CP-Ti welded-specimen and 558J/mm for 304SS welded-specimen.

• Periodical: Key Engineering Materials (Volume 728)
• Pages: 60-65
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.728.60
• Online since: January 2017
• Authors: Thanaporn Thonondaeng, Ghit Laungsopapun, Kittichai Fakpan, Krittee Eidhed
• Keywords: 304 Stainless Steel, GTAW Process, Overlay Welding, Titanium

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