Weldability studies in Cr-Mo-V turbine rotor steel

Journal Article · Fri Jan 01 04:00:00 EST 1988 · Journal of Materials Engineering; (USA)

DOI:https://doi.org/10.1007/BF02833868· OSTI ID:5194224

Kim, G S; Indacochea, J E ^[1]; Spry, T D ^[2]

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1. Illinois Univ., Chicago, IL (USA). Dept. of Civil Engineering, Mechanics, and Metallurgy
2. Commonwealth Edison Co., System Materials Analysis Dept., Maywood, IL (US)

This study was undertaken to establish the weldability of a high pressure steam turbine rotor (1.0Cr-1.0Mo-0.25V steel). Characterization of the as-received material and subsequent evaluation of a de-embrittlement procedure suggests that such heat treatment should be carried out prior to welding. But the improvement in roughness experienced by the heat affected zone (HAZ) of welds produced on both as-received and de-embrittled steel coupons suggests that a preweld de-embrittlement treatment is unnecessary. Further, a postweld heat treatment (PWHT) at the optimum temperature was found to improve the impact properties of both the HAZ and the base metal. The welds were automatically made on steel coupons with the welding parameters held constant, controlled by a microprocessor. In terms of short-term mechanical properties, the turbine rotor can be weld repaired.

• OSTI ID: 5194224
• Journal Information: Journal of Materials Engineering; (USA), Journal Name: Journal of Materials Engineering; (USA) Vol. 10:2; ISSN JMAEE; ISSN 0931-7058
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200105* -- Fossil-Fueled Power Plants-- Heat Utilization
36 MATERIALS SCIENCE
360103 -- Metals & Alloys-- Mechanical Properties
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
ALLOYS
AUTOMATION
CHROMIUM ALLOYS
CHROMIUM STEELS
COMPUTERIZED CONTROL SYSTEMS
COMPUTERS
CONTROL SYSTEMS
ELECTRONIC CIRCUITS
HEAT TREATMENTS
HIGH ALLOY STEELS
HIGH PRESSURE
IMPACT STRENGTH
IRON ALLOYS
IRON BASE ALLOYS
MACHINERY
MATERIALS TESTING
MECHANICAL PROPERTIES
MICROELECTRONIC CIRCUITS
MICROPROCESSORS
MOLYBDENUM ALLOYS
OPTIMIZATION
PERFORMANCE TESTING
REPAIR
STAINLESS STEELS
STEAM TURBINES
STEELS
TESTING
TURBINES
TURBOMACHINERY
VANADIUM ALLOYS
WELDABILITY