焼入性から見た溶接金属の特異性 : 溶接金属組織と靱性に関する研究(第 3 報)

概要

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The hardenability of the weld metal compared with rolled steel plate was investigated by means of both the dilatometry and the Jominy test to clarify the transformation behavior of the weld metal. Three kinds of specimens were prepared by the rolled steel plate, Electron Beam (EB) weld metal in the air and EB weld metal in vacuum. The Continuous-Cooling-Transformation (CCT) diagram for the EB weld metal in the air austenitized at 950℃ showed that the region of ferrite and bainite formation were shifted to the faster cooling rate. The hardenability of EB weld metal in the air was the lowest and that of rolled steel plate was the highest. It was concluded that the oxide inclusions and the microsegregation across the columnar dendrite lowered the hardenability of the weld metal.
社団法人溶接学会の論文
1982-04-05