Rotor welding to improve SCC resistance

Conference · Mon Nov 01 00:00:00 EST 1999

OSTI ID:697222

Segletes, D S; Moreci, J A; Cramer, E P ^[1]

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1. Siemens Westinghouse Power Corp., Charlotte, NC (United States)

Stress corrosion cracking (SCC) of low pressure steam turbine rotor blade attachments and disc bores is an industry issue on many older fossil and nuclear units. This paper discusses repair options available to the plant operator ranging from component restoration to enhancements dramatically increasing SCC resistance. The techniques described are uniformly applicable regardless of OEM and include geometric improvements to reduce peak surface stresses and material improvements through replacement or weld repair of components. Highlighted is the application of Gas Tungsten Arc Welding (GTAW) of steam turbine rotors including the use of 12% Cr weld metal to minimize susceptibility to SCC.

• Research Organization: Illinois Inst. of Tech., Chicago, IL (United States)
• OSTI ID: 697222
• Report Number(s): CONF-990410-PROC.-Vol.1; TRN: IM9946%%608
• Resource Relation: Conference: 61. American power conference annual meeting, Chicago, IL (United States), 6-8 Apr 1999; Other Information: PBD: 1999; Related Information: Is Part Of Proceedings of the American power conference: Volume 61-1; McBride, A.E. [ed.]; PB: 540 p.
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
20 FOSSIL-FUELED POWER PLANTS
22 NUCLEAR REACTOR TECHNOLOGY
STRESS CORROSION
CRACK PROPAGATION
WELDED JOINTS
ROTORS
STEAM TURBINES
REPAIR
CORROSION RESISTANCE
WEAR RESISTANCE
STEEL-CR12
GAS TUNGSTEN-ARC WELDING