Back to Search
Start Over
High strength-elongation product of Nb-microalloyed low-carbon steel by a novel quenching–partitioning–tempering process
- Source :
-
Materials Science & Engineering: A . Oct2011, Vol. 528 Issue 27, p8006-8012. 7p. - Publication Year :
- 2011
-
Abstract
- Abstract: In this article, a novel quenching–partitioning–tempering (Q–P–T) process was applied to a Fe–0.25C–1.5Mn–1.2Si–1.5Ni–0.05Nb (wt%) hot-rolled steel, and its optimized parameters were obtained by a Gleeble-3500 thermal simulator and salt baths, respectively. Mechanical property results of the as-treated Q–P–T samples show that the Nb-microalloyed low-carbon steels subjected to Q–P–T processes cover a wide spectrum of strength (1200–1500MPa) and elongation (14–18%), and exhibit excellent product of strength and elongation (21,000–22,000MPa%). Microstructural characterization indicates that high strength results from dislocation-type martensite laths and dispersively distributed fcc NbC or hcp ɛ-carbides in martensite matrix and good ductility is attributed to transformation induced plasticity (TRIP) effect from plenty of retained austenite flakes between martensite laths. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 09215093
- Volume :
- 528
- Issue :
- 27
- Database :
- Academic Search Index
- Journal :
- Materials Science & Engineering: A
- Publication Type :
- Academic Journal
- Accession number :
- 64483165
- Full Text :
- https://doi.org/10.1016/j.msea.2011.07.008