TY - JOUR
T1 - Oxidation rate of advanced heat-resistant steels for ultra-supercritical boilers in pressurized superheated steam
AU - Yi, Yong Sun
AU - Watanabe, Yutaka
AU - Kondo, Tatsuo
AU - Kimura, Hiroshi
AU - Sato, Minoru
PY - 2001/8
Y1 - 2001/8
N2 - Oxidation kinetics of recently developed ferritic heat-resistant steels, HCM12A, NF616, and HCM2S, were investigated in a superheated steam to evaluate the effects of chemical composition of the steels, testing temperature (560-700°C), steam pressure (1-10 MPa), and degrees of microstructural evolution by aging on oxidation. The contribution of alloyed Cr to oxidation resistance was pronounced above 600°C, while no material dependency was found at 600°C or lower. The apparent activation energy of the oxidation rate clearly changed at around 600°C for NF616 and HCM12A. In contrast, HCM2S showed single activation energy over the range of temperatures. Although temperature and chemical composition were the major factors, steam pressure also showed a clear negative effect on the oxidation rate in the lower temperature range, 570-600°C.
AB - Oxidation kinetics of recently developed ferritic heat-resistant steels, HCM12A, NF616, and HCM2S, were investigated in a superheated steam to evaluate the effects of chemical composition of the steels, testing temperature (560-700°C), steam pressure (1-10 MPa), and degrees of microstructural evolution by aging on oxidation. The contribution of alloyed Cr to oxidation resistance was pronounced above 600°C, while no material dependency was found at 600°C or lower. The apparent activation energy of the oxidation rate clearly changed at around 600°C for NF616 and HCM12A. In contrast, HCM2S showed single activation energy over the range of temperatures. Although temperature and chemical composition were the major factors, steam pressure also showed a clear negative effect on the oxidation rate in the lower temperature range, 570-600°C.
UR - http://www.scopus.com/inward/record.url?scp=7644222268&partnerID=8YFLogxK
U2 - 10.1115/1.1373656
DO - 10.1115/1.1373656
M3 - Article
AN - SCOPUS:7644222268
SN - 0094-9930
VL - 123
SP - 391
EP - 397
JO - Journal of Pressure Vessel Technology, Transactions of the ASME
JF - Journal of Pressure Vessel Technology, Transactions of the ASME
IS - 3
ER -