摘要
采用PREP法制备的Ti-48Al-2Cr-2Nb预合金粉末,通过热等静压致密化(HIP)制备Ti-48Al-2Cr-2Nb合金。对HIP态合金进行不同温度(1250、1285、1300℃)真空热处理,采用光学显微镜、扫描电子显微镜、万能拉伸试验机对HIP态和不同温度热处理后的合金组织、室温力学性能分析。结果表明:Ti-48Al-2Cr-2Nb合金不同温度热处理可分别得到近γ组织、双态组织、近片层组织,其中,1285℃真空热处理得到的双态组织室温抗拉强度和伸长率最佳,其抗拉强度达到495.5 MPa、伸长率高达1.5%。
The hot isostatic pressing(HIP) Ti-48Al-2Cr-2Nb alloy was prepared using the same component pre-alloy powders by PREP method. After then, the heat treated was carried out at different temperatures(1250 ℃, 1285 ℃ and 1300 ℃).The microstructure of the alloy before and after heat treatment was analyzed using optical microscope and scanning electron microscope, while the room temperature mechanical properties were evaluated by universal tensile testing machine. The results show that Ti-48Al-2Cr-2Nb alloy can obtain near-γ, dual-state and near-lamellar structure respectively at different heat treatment temperatures. Among them, the best tensile strength and elongation of dual-state structure are obtained by 1285 ℃,reaching 495.5 MPa and the elongation rate of up to 1.5%.
作者
唐洪奎
杨超
卓君
张国栋
赖运金
梁书锦
李智
TANG Hongkui;YANG Chao;ZHUO Jun;ZHANG Guodong;LAI Yunjin;LIANG Shujin;LI Zhi(Xi'an Metal Powder Materials Engineering Technology Research Center for 3D Printing,Sino-Euro Materials Technologies of Xi'an Co.,Ltd.,Xi'an 710018,China;AECC Commercial Aircraft Engine Co.,Ltd.,Shanghai 201100,China;No.12 Research Institute of CSIC,Xingping 713102,China)
出处
《热加工工艺》
北大核心
2022年第10期148-151,156,共5页
Hot Working Technology
基金
国家重点研发计划项目(2017YFE0301403)
陕西省重点研发计划项目(2020GY-305,2021GY-299)。
关键词
Ti-48Al-2Cr-2Nb合金
PREP法
真空热处理
双态组织
力学性能
Ti-48Al-2Cr-2Nb alloy
plasma rotating electrode process(PREP)method
vacuum heat treatment
duplex microstructure
mechanical properties
