TY - CONF
T1 - Life-refurbishment of service-degraded gas turbine buckets
AU - Yoshioka, Yomei
AU - Saito, Daizo
AU - Ishibashi, Kazutoshi
AU - Ishii, Junji
AU - Izumi, Atsuhiko
AU - Aburatani, Yasuhiro
AU - Itou, Akihiro
AU - Kagiya, Yukio
AU - Watanabe, Hirotaka
AU - Hyakudome, Seiichi
PY - 2004
Y1 - 2004
N2 - Various methods have been developed, and used in practice, to reduce the maintenance cost of gas turbine hot parts by extending the replacement life. The life-refurbishment process by Hot Isostatic Pressing (HIP) is one of our accomplishments for the buckets. This technology was applied for the buckets retired due to the scheduled life and was confirmed to rejuvenate the microstructures and the tensile, Charpy impact, creep and low cycle fatigue properties to a condition equivalent to or even better than the new ones under the development program. According to above mentioned accomplishments, a number of HIP refurbished buckets were reinstalled in a Chubu Electric Power Co. Inc. (CEPCO) 1100°C-class gas turbine rotor on December 1999 and operated successfully for 2 years under the joint program. Those buckets also served for destructive and non-destructive evaluations after operation. From those tests, we reconfirmed the reliability of the HIP refurbished buckets and also validated that the life-consumption rate was the same as new ones.
AB - Various methods have been developed, and used in practice, to reduce the maintenance cost of gas turbine hot parts by extending the replacement life. The life-refurbishment process by Hot Isostatic Pressing (HIP) is one of our accomplishments for the buckets. This technology was applied for the buckets retired due to the scheduled life and was confirmed to rejuvenate the microstructures and the tensile, Charpy impact, creep and low cycle fatigue properties to a condition equivalent to or even better than the new ones under the development program. According to above mentioned accomplishments, a number of HIP refurbished buckets were reinstalled in a Chubu Electric Power Co. Inc. (CEPCO) 1100°C-class gas turbine rotor on December 1999 and operated successfully for 2 years under the joint program. Those buckets also served for destructive and non-destructive evaluations after operation. From those tests, we reconfirmed the reliability of the HIP refurbished buckets and also validated that the life-consumption rate was the same as new ones.
KW - Bucket
KW - Creep
KW - HIP
KW - IN738LC
KW - Refurbishment
UR - http://www.scopus.com/inward/record.url?scp=10244243762&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=10244243762&partnerID=8YFLogxK
U2 - 10.1115/gt2004-54040
DO - 10.1115/gt2004-54040
M3 - Paper
AN - SCOPUS:10244243762
SP - 845
EP - 850
T2 - 2004 ASME Turbo Expo
Y2 - 14 June 2004 through 17 June 2004
ER -