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This thesis examined the effects of high productivity welding processes on the microstructure and properties of the heat affected zone (HAZ) of structural plate steels. It investigated three steels welded using 4-wire submerged arc welding and narrow gap welding. The study found that increasing heat input decreased HAZ toughness due to larger prior austenite grain size and coarse microstructural constituents. Changing welding speed had little effect on HAZ properties. Current type in narrow gap welding had

Author

heitor valendolf

Language

EN