Patent ID: 11959158
Assignee: UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C

Claim 4:
5. The method of claim 2, wherein, in the homogenizing annealing and forging process, an ingot from step i) is heated to 1200-1250° C. for 5 hours or more, held for 15-25 hours, subsequently cooled down to a heating temperature of 1130-1200° C., and then held for 2-3 hours; in a blooming forging process, an initial forging temperature is 1050-1130° C., a final forging temperature is 850° C. or more, an upsetting and drawing is repeated for 1 to 3 times, and an upsetting ratio is greater than 2.