Low-chromium reduced-activation chromium-tungsten steels

Technical Report · Tue Oct 01 00:00:00 EDT 1996

DOI:https://doi.org/10.2172/414871· OSTI ID:414871

Klueh, R. L.; Alexander, D. J.; Maziasz, P. J. ^[1]

---

1. Oak Ridge National Lab., TN (United States)

Bainitic microstructures formed during continuous cooling can differ from classical upper and lower bainite formed during isothermal transformation. Two types of non-classical bainite were observed depending on the cooling rate: carbide-free acicular bainite at rapid cooling rates and granular bainite at slower cooling rates. The Charpy impact toughness of the acicular ferrite was found to be considerably better than for the granular bainite. It was postulated that alloying to improve the hardenability of the steel would promote the formation of acicular bainite, just as increasing the cooling rate does. To test this, chromium and tungsten were added to the 2 1/4Cr-2W and 2 1/4Cr-2WV steel compositions to increase their hardenability, and the microstructures and mechanical properties were examined.

• Research Organization: Oak Ridge National Lab., TN (United States)
• OSTI ID: 414871
• Report Number(s): DOE/ER--0313/20; ON: DE97000700
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BAINITE
CHROMIUM ALLOYS
HARDNESS
MECHANICAL PROPERTIES
MICROSTRUCTURE
PRODUCTION
PROGRESS REPORT
STEELS
TUNGSTEN ALLOYS
VANADIUM ALLOYS