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석탄화력발전소 보일러 배관용 9Cr-2W계 강의 피로 및 크리프 파단 특성
이연수(Lee Yeon-Soo),유석현(Ryu Seog-Hyun),공병욱(Kong Byeong-Ook),이경운(Lee Kyong-Woon),김정태(Kim Jeong-Tae),백정웅(Baek Jeong-Woong),남수우(Nam Soo-Woo) 대한기계학회 2004 대한기계학회 춘추학술대회 Vol.2004 No.8
Low cycle fatigue and creep rupture properties have been investigated in welded joint of P92 steels for USC thermal power plant. According to the result of continuous Jow cycle fatigue test, fatigue life of base metal was longer than that of weld metal and HAZ with the temperature range. The fatigue life of creep-fatigue interaction test with 10min. hold time was shorter values by accelerated recovery phenomenon in comparison with continuous low cycle fatigue life. The creep rupture strength of cross weld was lower than that of base metal. Fracture position of cross weld after creep was located between FCHAZ and ICHAZ and change of fracture appearance was occurred from ductile to brittle mode at test temperature of 650℃.