| About this Abstract |
| Meeting |
13th International Conference on the Technology of Plasticity (ICTP 2021)
|
| Symposium
|
13th International Conference on the Technology of Plasticity (ICTP 2021)
|
| Presentation Title |
Hot Ring Rolling and Cold Expanding Strengthening of Mn18Cr18N Thick-wall Hollow Ingots |
| Author(s) |
Huiqin Chen, Huihan Wen, Jinliang Wang, Fei Li, Wenwu He |
| On-Site Speaker (Planned) |
Huiqin Chen |
| Abstract Scope |
A short route manufacturing process of retaining rings was put forward, which composed of hollow ingots manufacturing by ESR, hot ring rolling and cold expanding strengthening. And microstructure mechanisms, deformation characteristics and process parameters during both of hot ring rolling and cold hydraulic expanding strengthening were investigated. The results show that the multi-pass flow stresses decreased with increase of interval time. During multi-pass compression, grain refined at lower temperature of 1050C by static recrystallization, then grain refined at higher temperature of 1150C by both of dynamic and static recrystallization. Based on the influence of the contact arc length ratio on strain penetration in the wall deformation zone, the driving roller radius of 500mm and the pressure roller radius of 130mm were determined for the ring rolling process ofφ712mm/308mm902mm thick-wall hollow ingot. The optimum rotate velocity of the driving roller should be 0.8rad/s. And the feeding velocity of the pressure roller should to be 1mm/s for matching. During cold deformation, planar slip and twinning predominated at small and large deformation respectively to increase strength. For the hydraulic expanding process of 937/672×1034mm hollow forging, the optimum matching of 60 punch angle and 5mm contact seal height can be adopted for obtaining well-shaped strengthened forgings. |
| Proceedings Inclusion? |
Definite: At-meeting proceedings |