摘要
Ti-600 is one of the high performance titanium alloys used at 600 ℃,which was developed in Northwest Institute for Nonferrous Metal Research(NIN) in China. The tensile and creep properties of Ti-600 alloy with different thermal treatment conditions were investigated. The results indicate that Ti-600 alloy possesses favorite comprehensive properties solution-treated at 1 020 ℃ for 1 h,then air-cool,and aged at 650 ℃ for 8 h,finally air-cooling,especially possesses quite good creep resistance. The residual deformation is less than 0.1% for the alloy exposed at 600 ℃ for 100 h with the stress of 150 MPa,and the bimodal microstructures of the alloy are almost the same as that of the alloy treated by duplex thermal treatment,only needle primary α phases became relatively thicker and coarsened. The ultimate strength and the elongation of the alloy tested at ambient temperature are 1 080 MPa and 12%,respectively;while at 600 ℃,they are 690 MPa and 16%,respectively. The ductility of the alloy tested at room temperature is no less than 5% after thermal exposing at 600 ℃ for 100 h.
Ti-600 is one of the high performance titanium alloys used at 600℃, which was developed in Northwest Institute for Nonferrous Metal Research （NIN） in China. The tensile and creep properties of Ti-600 alloy with different thermal treatment conditions were investigated. The results indicate that Ti-600 alloy possesses favorite comprehensive properties solution-treated at 1020℃ for l h, then air-cool, and aged at 650℃ for 8 h, finally air-cooling, especially possesses quite good creep resistance. The residual deformation is less than 0.1% for the alloy exposed at 600℃ for 100 h with the stress of 150 MPa, and the bimodal microstructures of the alloy are almost the same as that of the alloy treated by duplex thermal treatment, only needle primary α phases became relatively thicker and coarsened. The ultimate strength and the elongation of the alloy tested at ambient temperature are l 080 MPa and 12%, respectively; while at 600℃, they are 690 MPa and 16%, respectively. The ductility of the alloy tested at room temperature is no less than 5% after thermal exposing at 600℃ for 100 h.
出处
《中国有色金属学会会刊：英文版》
CSCD
2007年第A01期522-525,共4页
Transactions of Nonferrous Metals Society of China
基金
Projects(2007CB613805) supported by the National Basic Research Program of China
关键词
钛
合金
温度
物理性能
Ti-600 alloy
high temperature titanium alloy
tensile property
creep resistance
