Superclean steel development

Technical Report · Fri Dec 01 00:00:00 EST 1989

OSTI ID:5148989

Richman, R H; McNaughton, W P ^[1]

---

1. Daedalus Associates, Inc., Mountain View, CA (USA)

The Electric Power Research Institute has actively encouraged and sponsored a number of research projects to develop a superclean 3.5NiCrMoV steel for low pressure turbine rotors. Such steel is highly resistant to temper embrittlement and will thus facilitate increased efficiency in electricity generation through the use of higher operating temperatures and improvements in design. The objective of this interim report was to integrate the results that have been generated to date worldwide in the pursuit of superclean steel. The report contains detailed findings that enable the interested utility to evaluate how the results affect utility decision making. A companion document has been written to summarize the findings from this technical report. The results indicate that steels with impurity contents typical of the superclean specification can be manufactured for production rotors with properties that equal or exceed those for conventional 3.5NiCrMoV rotors in every detail. Of particular interest are the results that the superclean steels appear to be virtually resistant to temper embrittlement to a temperature of 500 {degrees}C. 109 refs., 51 figs., 9 tabs.

• Research Organization: Electric Power Research Inst., Palo Alto, CA (USA); Daedalus Associates, Inc., Mountain View, CA (USA)
• Sponsoring Organization: EPRI
• OSTI ID: 5148989
• Report Number(s): EPRI-GS-6610
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
20 FOSSIL-FUELED POWER PLANTS
CHROMIUM-NICKEL STEELS
RESEARCH PROGRAMS
AUSTENITIC STEELS
CREEP
DUCTILITY
EFFICIENCY
EMBRITTLEMENT
FATIGUE
GRAIN SIZE
HEAT TREATMENTS
IMPACT STRENGTH
MANGANESE
MECHANICAL PROPERTIES
PROCESSING
ROTORS
STEELS
STRESS CORROSION
SULFUR CONTENT
TURBINES
YIELD STRENGTH
ALLOYS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CORROSION
CRYSTAL STRUCTURE
ELEMENTS
HIGH ALLOY STEELS
IRON ALLOYS
IRON BASE ALLOYS
MACHINERY
METALS
MICROSTRUCTURE
NICKEL ALLOYS
SIZE
STAINLESS STEELS
TENSILE PROPERTIES
TRANSITION ELEMENTS
TURBOMACHINERY
360103* - Metals & Alloys- Mechanical Properties
360105 - Metals & Alloys- Corrosion & Erosion
360102 - Metals & Alloys- Structure & Phase Studies
360101 - Metals & Alloys- Preparation & Fabrication
200104 - Fossil-Fueled Power Plants- Components