摘要
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%。
GH3128 alloy samples with carbon content of 0.031%and 0.015%are forged fromΦ500 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 toΦ200 mm round bar by using the heating temperature 1180℃and 1100℃and the deformation rate of 27.5%and 36%per operation respectively.The results show that the forging process of 1100℃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%.
作者
李成龙
钟裕国
李晴
赵长虹
荣文凯
Li Chenglong;Zhong Yuguo;Li Qing;Zhao Changhong;Rong Wenkai(Jiangsu Longda Superalloy Material Co.,Ltd.,Wuxi 214000)
出处
《特殊钢》
2023年第3期90-93,共4页
Special Steel
关键词
高温合金GH3128
自由锻
碳含量
晶粒度
High-temperature Alloy GH3128
Open-die Forging
Carbon Content
Grain Size
