| Abstract |
| Dissolution and precipitation behaviors of complex carbonitrides in austenite of a V-Nb microalloyed steel were quantitatively examined through electrical resistivity measurement and transmission electron microscopy. The electrical resistivity increased with solution treatment temperature up to 1240℃ and then was saturated at 225 nΩm for a holding time of 10 min. The electrical resistivity method was also used to quantitatively measure the isothermal precipitation kinetics of the complex carbonitrides in austenite. Nbrich precipitates were observed in austenite at the early stages of precipitation, but Nb was replaced by V up to the equilibrium amount within the precipitates with further holding time. The time-temperatureprecipitation diagram showed a C-type curve; nose temperature and its incubation time were 900℃ and 100 s, respectively. |
|
|
| Key Words |
| metals, thermomechanical processing, carbonitride, precipitation, electrical conductirity resistivity |
|
|
 |
|
