摘要
采用三火次热轧工艺制备出厚度为6.0mm的TC25钛合金板材,研究了退火温度对TC25钛合金板材显微组织、室温力学性能和高温力学性能的影响。结果表明:在760~840℃范围内,随着退火温度的升高,TC25钛合金板材热加工形成的等轴组织中初生α相长大;当退火温度升高至880℃时,显微组织由等轴组织向双态组织转变;温度进一步升高至920℃时,呈现双态组织;当退火温度达到960℃时,双态组织中的初生α相含量明显减少,次生α相含量显著增多。双态组织的TC25钛合金板材相比等轴组织的TC25钛合金板材具有更好的室温力学性能和高温力学性能。TC25钛合金板材在920~960℃退火时可获得双态组织,且具有良好的室温和高温拉伸性能。
TC25 titanium alloy plate with thickness of 6.0 mm were prepared by three-fire hot rolling process.The effects of annealing temperature on the microstructure,room and high temperature mechanical properties of TC25 titanium alloy plate were studied.The results show that with the increase of annealing temperature in the range of 760-840℃,the primaryαphase in the equiaxed microstructure formed by hot working grows.When the annealing temperature increases to 880℃,the microstructure of TC25 titanium alloy plate is transformed from equiaxed microstructure to duplex microstructure.And the duplex microstructure is presented when the annealing temperature increases to 920℃.When the annealing temperature reaches as high as 960℃,the content of primaryαphase in duplex microstructure is reduced,and the content of secondaryαphase is increased significantly.The TC25 titanium alloy plate with duplex microstructure has better room and high temperature mechanical properties than the TC25 titanium alloy plate with equiaxed microstructure.Annealing at 920-960℃,TC25 titanium alloy plate with duplex microstructure and excellent mechanical properties at room and high temperature can be obtained.
作者
张苗
强刚刚
关向东
蒲超博
孙梦桐
郭金榜
马佳琨
Zhang Miao;Qiang Ganggang;Guan Xiangdong;Pu Chaobo;Sun Mengtong;Guo Jinbang;Ma Jiakun(Baoji Titanium Industry Co.,Ltd.,Baoji 721014,China;Baoti Group Ltd.,Baoji 721014,China)
出处
《钛工业进展》
CAS
2024年第3期24-28,共5页
Titanium Industry Progress
关键词
TC25钛合金
板材
退火温度
显微组织
力学性能
TC25 titanium alloy
plate
annealing temperature
microstructure
mechanical properties
