Li Chenglong,Zhong Yuguo,Li Qing,et al.Effect of Open-Die Forging Process and Carbon Content on Microstructure and Mechanical Properties of High-temperature Alloy GH3128[J].Special Steel,2023,44(03):90-93.
Li Chenglong,Zhong Yuguo,Li Qing,et al.Effect of Open-Die Forging Process and Carbon Content on Microstructure and Mechanical Properties of High-temperature Alloy GH3128[J].Special Steel,2023,44(03):90-93. DOI: 10.20057/j.1003-8620.2022-00192.
针对C含量分别为0.031%和0.015%的GH3128合金锭,采用相同自由锻锻造工艺由Φ500 mm铸锭锻制成350 mm × 350 mm方坯,再分别采用1 180 ℃和1 100 ℃的加热温度以及27.5%和36%的每火次变形率将350 mm × 350 mm方坯锻成Φ200 mm圆棒。结果表明,1 100 ℃加热并采用27.5%每火次变形率可以获得最佳晶粒组织;同时显微组织及碳化物数量与C含量关系密切,而与锻造工艺关系较小;0.031%C相较于0.015%C,室温拉伸强度提升5%~10%,950 ℃高温持久时间提升30%。
Abstract
GH3128 alloy samples with carbon content of 0.031% and 0.015% are forged from Φ500 mm ingots to 350 mm × 350 mm square billet by the same open-die forging process,then forge the 350 mm × 350 mm square billet to Φ200 mm round bar by using the heating temperature 1 180 ℃ and 1 100 ℃ and the deformation rate of 27.5% and 36% per operation respectively. The results show that the forging process of 1 100 ℃ heating temperature and 27.5% deformation rate per operation lead to optimal grain size;At the same time the amount of carbide and microstructure is closely related to C content, but has little relationship with forging process; Compared 0.031%C with 0.015%C , the tensile strength of room temperature is increased by 5%-10%, and the 950 ℃ high temperature stress-rupture time increased by 30%.
Zhao Xi , Yuan Kun , Zhou Yu , et al . Research on the high-temperature hot compressive deformation behavior of Ni-based superalloy GH3128 [J]. Journal of Pressure Vessel Technology , 2017 , 139 : 1 - 8 .