Skorobogatykh V.,JSC RPA CNIITMASH |
Schenkova I.,JSC RPA CNIITMASH |
Kozlov P.,JSC RPA CNIITMASH |
Nakhabina M.,JSC RPA CNIITMASH |
Rogalev A.,National Research University Moscow Power Engineering Institute
Contemporary Engineering Sciences | Year: 2015
The paper represents the results of investigation of martensitic and austenitic steels and their development in manufacturing of steam pipes and heating surface for advanced ultra-supercritical (A-USC) power plants with service steam temperature up to 680°C and pressure up to 32 MPa. There was shown that alloying by 3% Co of martensitic steels such as 9Cr-2W-Mo-VNb contributed to obtaining a high degree of dispersion of structure and improve creep resistance on 15-20% compared to steel type T/P92. Optimization of chemical composition and heat treatment parameters developed austenitic heat-resistant steel have provided a growth of long-term strength up to ~ 1.5 times (~ 96 N/mm2 at 680°C, 105h) in comparison with steels such as TP347. Steels were developed in manufacturing of parts of TPP equipment (headers, reheaters, steampipes etc.). © 2015 V. Skorobogatykh, I. Schenkova, P. Kozlov, M. Nakhabina and A. Rogalev.