C221 蒸気タービン車室の補修溶接技術の開発(補修・溶接技術,OS5 保全・設備診断技術),動力エネルギーシステム部門20周年,次の20年への新展開)

概要

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Recently, some cracks due to thermal fatigue have been founded in aged steam turbine casing. Repair welding after the removal of the deteriorated areas is considered as a potential method for improving the life of such components. So, applicability of the control deposition technique as the repair welding, which does not need post weld heat treatment (PWHT) is examined for Cr-Mo-V cast steel. By conducting tensile, creep, and low-cycle fatigue tests of the welded joint by the control deposition method, it is found that the control deposition technique is applicable to the repair welding for the turbine casings.
一般社団法人日本機械学会の論文
2010-06-20