Читать книгу Welding Metallurgy - Sindo Kou - Страница 43

ESW can have extremely high deposition rates, but only one single pass is required, no matter how thick the workpiece is. Unlike SAW or other arc welding processes, there is no angular distortion in ESW because the weld is symmetrical with respect to its axis. However, the heat input is very high, and the weld quality can thus be rather poor, including low toughness caused by coarse grains in the fusion zone and HAZ. ESW is restricted to vertical position welding because of the very large pools of the molten metal and slag.

Cary [14] summarized the deposition rates of various arc welding processes. The deposition rate increases in the order of GTAW, SMAW, GMAW and FCAW, SAW, and ESW. The deposition rate can be much increased by adding iron powder in SAW or using more than one wire in SAW, ESW, and GMAW.