Strain-Induced Precipitation in Nb-Bearing Low Carbon Multi-Microalloyed Steel
Thermo-simulation test, transmission electron microscopy(TEM) and nanobeam EDS technique were used to investigate the strain induced precipitation behavior during relaxation process after deformed austenite in Mn-Mo-Nb-B low carbon multi-microalloyed Steel. The experiment results indicate that during isothermal held at 850 °Cand 900 °C after predeformation, the size of precipitates occurred in the Mn-Mo-Nb-B steel at different stage is smaller than that happened in the only Nb and Ti-bearing microalloyed steel. The ratio of Nb/Ti to precipitates increased with the relaxing time. After being held longer, Mo atoms would enter the lattice of (Nb,Ti)(C,N) precipitates and the amount in the precipitates increased with the relaxation as time prolonged.
Zhengyi Jiang and Chunliang Zhang
S. Q. Yuan et al., "Strain-Induced Precipitation in Nb-Bearing Low Carbon Multi-Microalloyed Steel", Advanced Materials Research, Vols. 97-101, pp. 560-564, 2010