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강창룡,주동원,성장현,김익수,배동수,官原一載 대한금속재료학회 2002 대한금속·재료학회지 Vol.40 No.11
This study investigated the effect of aging treatment, Co addition and stress on the precipitation of Laves phase in 10Cr-6W ferritic heat-resistant steel for ultra-super critical pressure power generating plants. The hardness change during the aging treatment has shown two peaks. Ductility and toughness rapidly decreased by the very fine disk-like Laves phase precipitates at initial stage of aging. As aging time gets longer, Laves phase has precipitation, which brings out strength's increase, on the other hand elongation and impact value decrease. Content of Laves phase precipitates increased with addition of Co. The stress during the aging enhanced the Laves phase precipitates, and content of Laves phase precipitates and particle numbers per unite area enlarged by increasing of stress.