| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1621989 | Journal of Alloys and Compounds | 2009 | 7 Pages |
The transformation characteristics from the austenite to bainite in a 30CrNi3MoV steel were systematically investigated in the continuous cooling rate range of 5–20 °C/min by high-resolution dilatometric measurements and microstructural observations. According to the kinetic information obtained from dilatometric measurements, it is recognized that the bainitic transformation in the explored 30CrNi3MoV steel exhibits not only incompleteness but also stasis features. Microstructure analysis suggests that carbon-rich austenite is retained after the bainitic transformation (normally termed as bainitic incompleteness), and it further evolves into the twin martensite with high-carbon content when the applied cooling rate is above 8 °C/min. The retained austenite will be reserved permanently when the applied cooling rate is as slow as 5 °C/min. The incompleteness of bainitic transformation is believed to be benefit for the further improvement of mechanical properties due to the presence of short twin martensite plates among the lower bainites.
