A complex carbonitride of niobium and vanadium in 9% Cr ferritic steels

Journal Article · Tue Jan 01 00:00:00 EST 1991 · Scripta Metallurgica; (United States)

DOI:https://doi.org/10.1016/0956-716X(91)90240-2· OSTI ID:5279361

Tokuno, K; Hamada, K; Takeda, T ^[1]; Uemori, R ^[2]; Itoh, K ^[3]

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1. Plate, Bar, Shape and Wire Rod Lab., R and D Lab.-II, Nippon Steel Corp., Sagawihara 229 (JP)
2. Material Characterization Research Lab., R and D Lab.-I, Nippon Steel Corp., Kawasaki 211 (JP)
3. R and D Lab.-II, Nippon Steel Corp., Sagawihara 229 (JP)

It has been considered that small additions of Nb and V have striking effects on the creep strength of high Cr ferritic steels which are used for elevated temperature services such as boilers, steam generators etc. Although Nb and V are thought to form complex precipitates which may act as obstacles for the dislocation glide, the distribution and morphology of the precipitates have not been clarified yet. Several examples of simple precipitates of V in low alloy steels were only reported. In this paper, the morphology of the complex carbonitride of Nb and V in 9% Cr ferritic steels was investigated and the role of the carbonitride on the creep strength was discussed.

• OSTI ID: 5279361
• Journal Information: Scripta Metallurgica; (United States), Vol. 25:1; ISSN 0036-9748
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
FERRITIC STEELS
NIOBIUM ADDITIONS
HEAT RESISTING ALLOYS
CREEP
BOILERS
CARBONITRIDES
CHEMICAL COMPOSITION
CHEMICAL REACTION KINETICS
MATERIALS TESTING
MORPHOLOGY
STEAM GENERATORS
VANADIUM ADDITIONS
ALLOYS
CARBON COMPOUNDS
HEAT RESISTANT MATERIALS
IRON ALLOYS
IRON BASE ALLOYS
KINETICS
MATERIALS
MECHANICAL PROPERTIES
NIOBIUM ALLOYS
NITROGEN COMPOUNDS
REACTION KINETICS
STEELS
TESTING
VANADIUM ALLOYS
VAPOR GENERATORS
360103* - Metals & Alloys- Mechanical Properties
360102 - Metals & Alloys- Structure & Phase Studies