摘要
V-5Cr-5Ti合金具有良好的抗辐照和尺寸稳定性能,是良好聚变堆第1壁结构材料。但直接由粉末冶金法制得的V-5Cr-5Ti合金的力学性能达不到工程要求。为此研究了旋锻对粉末冶金法制备的V-5Cr-5Ti合金力学性能的影响。实验分别采取1050℃和1200℃旋锻,并在1050℃退火。结果表明:经1200℃旋锻并在1050℃退火后,合金的抗拉强度达470 MPa,屈服强度达到337 MPa,并有24.2%伸长率,致密度高达99.3%。金相分析发现,该状态组织结构均匀,晶粒度达到10级。试样断裂区域存在富Ti及富Cr固溶区,脆性区域主要为Ti(CON)相,韧性断裂区域主要为富V合金区。
V-5Cr-5Ti alloy has good resistance to irradiation and dimensional stability. It is a good structural material for the first wall of fusion reactor. But the V-5Cr-5Ti alloy prepared directly by powder metallurgy method can not reach the mechanical properties for the engineering requirements. Therefore, the effects of rotary swaging on the mechanical properties of powder metallurgy V-5Cr-5Ti alloy were studied. Rotary forging experiments were conducted in 1050℃ and 1200 ℃ respectively. And then annealing was at 1050℃. The results show that the tensile strength is 470 MPa, yield strength is 337 MPa, the elongation is 24.2%, density is 99.3% after the rotary swaging at 1200℃ and annealing at 1050℃ . The metallographic analysis discovers that the microstructure at the state is uniform and its grain size reaches 10 classes. There are Ti-rich and Cr-rich solid solution region in fracture zone of sample. The brittle fracture region of the sample is mainly Ti （CON） phase and the ductile fracture region is mainly V-rich alloy zone.
出处
《热加工工艺》
CSCD
北大核心
2014年第15期62-65,共4页
Hot Working Technology
关键词
钒合金
旋锻
显微组织
塑性
vanadium alloy
rotary swaging
microstructure
plasticity
