Mechanical Properties of Electron Beam Welds of Centrifugal Casting Steel Plates(Materials, Metallurgy & Weldability)

概要

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A horizontal full penetration welding of centrifugal casting steel plates up to 50mm thickness for 50kg/mm^2 class welded structure was conducted by using horizontal electron beam subjected to 90°deflection and a sound weld bead of very narrow width and without internal defects could be obtained. Charpy specimens of different shapes were sampled from the welded zones of one pass full penetration welding with varying welding heat input and the properties were investigated by impact test to study toughness of the welded zones. From the relationship between brittleness fracture transition temperature of the specimen fracture after Charpy impact test and welding heat input, relative toughness was evaluated to verify that the toughness of the welded zones of this material is improved by low heat input welding.
大阪大学の論文