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      • 2相 스테인리스鋼 熔接部의 後熱處理 溫度의 影響

        陸鍾律,權鍾完 慶一大學校 1997 論文集 Vol.14 No.2

        An experimental study was performed to investigate the metallurgical characteristics of weldment for duplex stainless steel. Considering that duplex stainless steel in a composite structure of α and γ phase, it can be found that mechanical variables of weldment structure are different from base metal by weld cycle, weld deformation and residual stress through weld input heat, it has some problems because it will be easily brittle through slow cooling by post weld heat treatment. It was observed the embrittlement phenomenon in high ferrite stainless steel and after impact test to identify the fracture characteristics of the weldment, the obserbed energy was lowest in about 1073K. Therefore, it should be avoided the post weld heat treatment about those temperature. The result could be anticipated that the range of γ-phase's precipitation of Widmanstatten, which occured in heat affected zone as changing microstructure by the variation of weld heat input.

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