| 摘要 |
PURPOSE:To improve material yield and reduce production cost by welding both ends of a maraging steel band to form an endless ring, annealing at above specified temperature, ring rolling and performing solid solution and aging treatments. CONSTITUTION:A welded ring for ring rolling is manufactured by welding both ends of a maraging steel material. After annealing at >=800 deg.C, it is ring rolled to form a belt hoop. An endless hoop of very small variation in building up having a smooth weld zone is manufactured by solid solution treating for about an hour at about 820 deg.C and aging for about 3hr at about 510 deg.C. |
