材料工程2025，Vol.53Issue(11)：72-79,8.DOI:10.11868/j.issn.1001-4381.2023.000310
先进超超临界汽轮机转子用大截面C700R-1合金锻件及力学性能
Large section C700R-1 alloy forging for advanced ultra-supercritical turbine rotor and mechanical properties
摘要
Abstract
To address the evolving demands for the clean and efficient utilization of coal,efforts have been devoted to the research and development of C700R-1 nickel-based alloy rotor forgings for advanced ultra-supercritical steam turbine rotors.Concurrently,tests are conducted on the conventional mechanical properties and creep rupture properties of the trial-manufactured rotor forgings.The results show that the use of the closed upsetting+extrusion method enables the high-homogeneity forging of Φ850 mm forgings.The as-forged grain size of the developed large-section forgings ranges from grade 4 to grade 7,and the grain size after heat treatment is approximately grade 3.Due to the rapid cooling rate of the edge parts after solid solution,a large number of uniform and fine γ' phases precipitate in the subsequent aging process.Therefore,the tensile properties of edge position are slightly better than those of the heart and 1/2R position.The variation of tensile properties in different directions of edge position is small.The room temperature tensile strength can reach 950 MPa,the yield strength can reach 600 MPa,and the V-notch absorbed energy at room temperature is beyond 70 J at different positions after heat treatment.The tensile strength can reach 750 MPa,yield strength can reach 500 MPa at 700℃.The plasticity is higher than 25%at room temperature and 700℃.The creep life exceeds 7000 h in the condition of 700℃/300 MPa.Through the deformation mode of closed upsetting+extrusion and reasonable heat treatment process,the homogenization manufacturing of nickel base alloy forgings with a section grade of Φ850 mm,which provides key data for the subsequent manufacturing of full-size nickel base alloy rotor forgings.关键词
先进超超临界/转子/C700R-1/镍基合金/挤压/力学性能Key words
advanced ultra-supercritical/rotor/C700R-1/nickel-based alloy/extrusion/mechanical property分类
矿业与冶金引用本文复制引用
白亚冠,聂义宏,张鑫,寇金凤,郭伟,李红梅,张冰冰,曹志远,王宝忠..先进超超临界汽轮机转子用大截面C700R-1合金锻件及力学性能[J].材料工程,2025,53(11):72-79,8.基金项目
国家重点研发计划基金项目(2021YFB3704102) （2021YFB3704102）
2021年国家新材料应用示范平台项目(TC210H022) （TC210H022）
黑龙江省自然科学基金项目(JQ2021E007) （JQ2021E007）
