構造用高張力鋼(50,60 および 80 キロ級)の電子ビーム溶接性に関する研究(第 2 報) : 継手性能についての検討(<特集>溶接・溶断による変形と応力に関するシンポジウム)

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Square-butt welding was performed on 25mm thick plates of commercial high tension steels (HT50,60 and 80) with electron-beam welding. Two electron-beam welders (conventional high voltage and low voltage types) were used for this investigation, and the weld heat input was respectively varied with and without 100℃ preheating. Some results of the mechanical properties of the welds of HT-50,60 and 80 steels such as hardness distribution, tensile and fatigue properties were investigated in this paper. Most of welds have had no defects that were detectable by dye pencetrant and X-ray inspections. It seemed that only Mn in weld metal was a little vaporized during electron-beam welding. The average hardness of weld metal was decreased with an adoption of preheating, but even in weld metal without preheating it was not so high to originate some cold cracks. Most of tensile-tested specimen for the welded joint fractured in the base metal, and all of face-and root-bended specimens showed a complete bend angle of 180 degree without any defects. In case of fatigue test, the fatigue limit of welded joint showed the adequate value which corresponded to that of respective base metal of HT-50,60 and 80 steels, and it seems that the fatigue limit was raised with an increase of the hardness of weld metal. From the results of these mechanical tests, it is anticipated that the electron beam welding process will be promising for the welding of these constructional high tension steels.
社団法人溶接学会の論文
1976-01-05

構造用高張力鋼(50,60 および 80 キロ級)の電子ビーム溶接性に関する研究(第 2 報) : 継手性能についての検討(<特集>溶接・溶断による変形と応力に関するシンポジウム)

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