US 12,146,201 B2
Method for internal stress regulation in superalloy disk forgings by pre-spinning
Beijiang Zhang, Beijing (CN); Wenyun Zhang, Beijing (CN); Chenggang Tian, Shanghai (CN); Aihua Huang, Shanghai (CN); Guodong Zhang, Shanghai (CN); Haijun Xuan, Zhejiang (CN); Chuanyong Chen, Zhejiang (CN); Shuo Huang, Beijing (CN); Heyong Qin, Beijing (CN); Qiang Tian, Beijing (CN); and Ran Duan, Beijing (CN)
Assigned to Gaona Aero Material Co., Ltd., Beijing (CN); AECC COMMERCIAL AIRCRAFT ENGINE CO., LTD., Shanghai (CN); Zhejiang Hiro Aviation Technology Co., Ltd., Zhejiang (CN); and CENTRAL IRON & STEEL RESEARCH INSTITUTE, Beijing (CN)
Filed by Gaona Aero Material Co., Ltd., Beijing (CN); AECC COMMERCIAL AIRCRAFT ENGINE CO., LTD., Shanghai (CN); Zhejiang Hiro Aviation Technology Co., Ltd., Zhejiang (CN); and CENTRAL IRON & STEEL RESEARCH INSTITUTE, Beijing (CN)
Filed on Jul. 19, 2021, as Appl. No. 17/378,792.
Prior Publication US 2023/0016175 A1, Jan. 19, 2023
Int. Cl. C21D 8/02 (2006.01); C21D 9/40 (2006.01); C21D 11/00 (2006.01); G01L 5/00 (2006.01)
CPC C21D 8/0221 (2013.01) [C21D 9/40 (2013.01); C21D 11/00 (2013.01); G01L 5/0047 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A method for internal stress regulation in superalloy disks made by powder metallurgy, casting or forging by pre-spinning, comprising:
Step S1: determining a target revolution rate for regulating internal stress in the superalloy disks, and determining a target deformation magnitude of plastic deformation required for regulating the internal stress by the pre-spinning of the superalloy disks, wherein the target deformation magnitude is 0.05%-1.95%;
wherein Step S1 comprises:
Step S11: obtaining a predicted revolution rate for regulating the internal stress in the superalloy disks by simulated calculation; Step S11 comprising:
Step S111: obtaining internal stress distribution of the superalloy disks by simulating heat treatment of the superalloy disks; Step S111 comprising:
obtaining the internal stress distribution of the superalloy disks after the heat treatment by detecting an actual internal stress in the superalloy disks and correcting a simulated result of the superalloy disks by using the actual internal stress; and
Step S112: simulating the pre-spinning of the superalloy disks by different revolution rates to determine the predicted revolution rate; wherein the pre-spinning by the predicted revolution rate enables the internal stress in the superalloy disks to be regulated to be 400 MP or below and enables residual deformation magnitude of the superalloy disks to be 0.05%-4.95%;
Step S12: performing the pre-spinning of the superalloy disks by the predicted revolution rate, and monitoring a deformation magnitude of the superalloy disks; and
Step S13: adjusting the predicted revolution rate according to the deformation magnitude of the superalloy disks to determine the target revolution rate; Step S13 comprising:
S131: determining the predicted revolution rate as the target revolution rate when the deformation magnitude of the superalloy disks reaches the target deformation magnitude when performing the pre-spinning of the superalloy disks by the predicted revolution rate; and
S132: when the deformation magnitude of the superalloy disks is lower than the target deformation magnitude when performing the pre-spinning of the superalloy disks by the predicted revolution rate, increasing a revolution rate of the pre-spinning until the deformation magnitude of the superalloy disks reaches the target deformation magnitude when performing a final revolution rate of the pre-spinning, and determining the final revolution rate as the target revolution rate; Step S132 comprising:
increasing the revolution rate of the pre-spinning by increments of 25-100 rotations per minute when the deformation magnitude of the superalloy disks is lower than the target deformation magnitude when performing the pre-spinning of the superalloy disks by the predicted revolution rate, wherein the deformation magnitude of the superalloy disks is monitored after keeping a current revolution rate for at least 30 seconds before moving to a next increment when performing the pre-spinning;
Step S2: performing the pre-spinning of the superalloy disks by the target revolution rate, monitoring the deformation magnitude of the superalloy disks, and stopping the pre-spinning when the deformation magnitude of the superalloy disks reaches the target deformation magnitude; and
Step S3: drawing an internal stress distribution diagram of the superalloy disks after the pre-spinning, Step S3 comprising:
Step S31: simulating the pre-spinning of the superalloy disks by the target revolution rate to obtain the internal stress distribution of the superalloy disks after the pre-spinning; and
Step S32: detecting an actual internal stress at a feature site of the superalloy disks, and correcting a simulated result of the superalloy disks after the pre-spinning by using the actual internal stress at the feature site to obtain the internal stress distribution of the superalloy disks after the pre-spinning,
wherein when monitoring the deformation magnitude of the superalloy disks, a stable value is taken as the deformation magnitude of the superalloy disks, and when the deformation magnitude fluctuates in a range of ±0.01 mm within 15 s, the stable value is reached.