A new steel for single cylinder steam turbine rotors
Conference
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OSTI ID:549963
- Toshiba Corp., Yokohama (Japan). Heavy Apparatus Engineering Lab.
- Japan Steel Works, Ltd., Muroran (Japan)
A new steel, 2.25%Cr1.7%NiMoVNbW steel has been developed for the high pressure (HP)-low pressure (LP) single cylinder steam turbine rotor in combined power plants and medium/small rating thermal power plants. This steel has good creep rupture strength equivalent to that of 1%CrMoV steel which has been used as HP rotor fogings and excellent toughness and proof stress considerably superior to the conventional HP-LP single cylinder rotor steels. This paper includes the following contents: The optimization of chemical composition and heat treatment condition; the production and evaluation of a 70 tons trial rotor forging by the application of VCD (Vacuum Carbon Deoxidation) process; the production and evaluation of a 43 tons trial ingot by the application of ESR (Electroslag Remelting) ingot process; and the production and evaluation of rotor forgings for the commercial power plant.
- OSTI ID:
- 549963
- Report Number(s):
- CONF-961006--; ISBN 0-7918-1796-2
- Country of Publication:
- United States
- Language:
- English
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