Mechanical Properties of Electron Beam Welds of Heavy Section Steel Plates(Materials, Metallurgy & Weldability)

概要

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The electron beam (EB) welding process has been applied to heavy section steel plates mainly because of its high productivity and low heat input. There are, however, several problems to be solved. In this study, mechanical properties (mainly toughness) of EB welds have been investigated for nine heavy section steel plates. Correlations have been found between toughness and carbon content of EB welds. The toughness improved with reducing carbon content, especially in the as-welded condition. The toughness of steels with high carbon content (C≧0.24%) is extremely poor owing to the formation of high carbon martensitic island, and modification of chemical composition is required for these steels. Therefore B treated steel with low C content could be expected to have improved toughness of EB welds.
大阪大学の論文