Hot tensile experiment of 23CrNi3Mo steel was carried on a Gleeble-1500 thermal mechanical simulator. The effects of deformation temperature (800-1200°C) and strain rate (0.002-20 s-1) on hot ductility behavior and fracture mechanism of the steel were researched. The results show that 23CrNi3Mo steel has excellent hot ductility. In the hot tensile test, the peak stress exhibits a linear decreasing as the increasing of the temperature. However, peak stress increases as the increasing of the strain rate. When the strain rate is 2 s-1, fracture mechanism of the steel at 800-1200°C has the same characteristics which are ductile fracture. When the temperature is higher, the dimples are deeper and its diameter is smaller. With the declining of strain rate, fracture mode changes from ductile fracture to brittle. When the strain rate is higher than 0.2 s-1, the fracture is ductile. While the strain rate is lower than 0.2 s-1, the fracture is intergranular fracture. Inclusions have some influence on the initiation and propagation of cracks.
|Number of pages||5|
|Journal||Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment|
|Publication status||Published - 2014 Jun|
- Fracture mechanism
- Hot ductility
- Strain rate