High pressure-low pressure single cylinder turbine rotor and met

Details High pressure-low pressure single cylinder turbine rotor and met High pressure-low pressure single cylinder turbine rotor and met

1995-03-29

1997-03-18

Yee, Deborah

Metal treatment

Stock

Ferrous

148547, 416241R, 420109, C21D 810, C22C 3844, C22C 3846

Patent

active

056118732

ABSTRACT:
A high pressure-low pressure single cylinder turbine rotor is disclosed which is characterized by being formed of a steel of a composition having, by weight, a C content of from 0.10 to 0.35%, a Si (silicon) content of not more than 0.3% (not including 0%), a Mn (manganese) content of not more than 1.0% (not including 0%), a Ni content of from 1.0 to 2.0%, a Cr (chromium) content of from 1.5 to 3.0%, a Mo content of from 0.9 to 1.3%, a V (vanadium) content of from 0.10 to 0.35%, a Nb (niobium) content of from 0.01 to 0.15%, a W content of from 0.1 to 1.5%, and the balance of Fe (iron) and inevitable impurities, the inevitable impurities having a P content of not more than 0.005%, a S content of not more than 0.001%, an As content of not more than 0.008%, a Sb content of not more than 0.004%, and a Sn content of not more than 0.008%.

REFERENCES:
patent: 5437742 (1995-08-01), Siga et al.
M. Yamada et al.; Proceedings of the Robert I. Jaffee Memorial Symposium on Clean Materials Technology, ASM Materials Week, "HLP Single Cylinder Steam Turbine Rotor Forgings for Combined Cycle Power Plants"; pp. 161-168; Nov. 2, 1992.
Y. Tsuda et al.; Proceedings of JSME-ASME International Conference on Power Engineering-93, "Development of Advanced HLP Single Cylinder Steam Turbine Rotor Forgings"; pp. 91-96; Sep. 12, 1993.

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