| 2000 №09 (25) | 2000 №09 (27) |
The Paton Welding Journal, 2000, #9, 157-160 pages
Effect of shielding gas composition on characteristics of high-efficiency consumable-electrode ahielded-gas welding (MAG)
G.B. Czworno
Institute of Welding, Glivice. PolandAbstract
The results of investigation of high-efficiency processes of welding in Ar-He-CO2 and Ar-CO2 mixtures at 450 A currents are given. The sizes of a cross-section of deposited beads, including the depth of penetration are evaluated. The chemical composition was determined, metallographic examinations, and also the tensile tests, impact bend and fracture toughness tests of metal deposited in shielding gas mixtures at 300, 350 and 400 A currents were performed. There were no significant differences in properties of the metal deposited in various mixtures. Good characteristics of properties of the deposited metal and welded joints obtained at currents up to 430 A using all compositions of shielding gas mixtures were confirmed.
Keywords: arc welding consumable electrodes, shielding gases carbon dioxide gas
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