Carbonitride precipitation in niobium/vanadium microalloyed steels

Journal Article · Sun Feb 01 04:00:00 EST 1987 · Metall. Trans., A; (United States)

DOI:https://doi.org/10.1007/BF02825702· OSTI ID:7006457

Speer, J G; Michael, J R; Hansen, S S

A detailed study of carbonitride precipitation in niobium/vanadium microalloyed steels is presented. A thermodynamic model is developed to predict the austenite/carbonitride equilibrium in the Fe-Nb-V-C-N system, using published solubility data and the Hillert/Staffansson model for stoichiometric phases. The model can be used to estimate equilibrium austenite and carbonitride compositions, and the amounts of each phase, as a function of steel composition and temperature. The model also provides a method to estimate the carbonitride solution temperatures for different steel compositions. Actual carbonitride precipitation behavior in austenite is then examined in two experimental 0.03Nb steels containing 0.05V and 0.20V, respectively.

• Research Organization: Research Dept., Bethlehem Steel Corp., Bethlehem, PA (US)
• OSTI ID: 7006457
• Journal Information: Metall. Trans., A; (United States), Journal Name: Metall. Trans., A; (United States) Vol. 18A:2; ISSN MTTAB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
ALLOYS
AUSTENITE
CARBON ADDITIONS
CARBON COMPOUNDS
CARBON NITRIDES
CRYSTAL STRUCTURE
IRON ALLOYS
IRON BASE ALLOYS
MATHEMATICAL MODELS
MICROSTRUCTURE
NIOBIUM ALLOYS
NITRIDES
NITROGEN COMPOUNDS
PARTICLE MODELS
PNICTIDES
PRECIPITATION
SEPARATION PROCESSES
SOLUBILITY
STATISTICAL MODELS
STEELS
THERMODYNAMIC MODEL
VANADIUM ALLOYS