热处理对Ti90合金冷轧管材组织与力学性能的影响  

Effect of Heat Treatment on Microstructure and Mechanical Properties of Cold Rolled Ti90 Alloy Tube

作　　者：李思兰[1] 贾蔚菊[1] 李倩[1] 毛成亮 王可 张思远[1] 周伟[1] Li Silan;Jia Weiju;Li Qian;Mao Chengliang;Wang Ke;Zhang Siyuan;Zhou Wei(Northwest Institute for Nonferrous Metal Research,Xi’an 710016,China)

机构地区：[1]西北有色金属研究院,陕西西安710016

出　　处：《钛工业进展》2022年第5期17-21,共5页Titanium Industry Progress

基　　金：国家重点研发计划项目(2021YFB3700802)。

摘　　要：采用LD60三辊冷轧机制备出规格分别为∅50 mm×6 mm×L和∅67 mm×10 mm×L的Ti90合金管材,研究了退火温度对管材显微组织及力学性能的影响。结果表明:冷轧态Ti90合金管材的显微组织由扭折排列的α集束构成,经750℃退火后形成α集束分布均匀的网篮组织,经930℃退火后形成双态组织;退火温度对管材的组织特征影响较大,而轧制变形量仅对管材的β晶粒尺寸有一定影响;随着退火温度的升高,Ti90合金管材的室温抗拉强度和-10℃低温冲击韧性先降低后升高,延伸率变化不明显,且在930℃退火后综合性能最优。LD60 three-roller cold rolling mill was used to prepare the following products:∅50 mm×6 mm×L and∅67 mm×10 mm×L Ti90 alloy tubes.The effect of annealing temperature on microstructure and mechanical properties of the tube was studied.The results show that the microstructure of the cold rolled Ti90 alloy tube is arranged by twistingαcluster,and after annealing at 750℃,a basketweave microstructure with uniformαcluster is formed,and after annealing at 930℃,a duplex microstructure is formed.The annealing temperature has a greater impact on the structure of the tube,and the rolling deformation only has a certain impact on the grain size of the tube.With the increase of annealing temperature,the tensile strength at room temperature and the impact toughness at-10℃of Ti90 alloy tube decrease first and then increase,and the elongation does not change significantly,the comprehensive properties are the best after annealing at 930℃.

关 键 词：Ti90合金 管材 热处理 显微组织 力学性能 

分 类 号：TG166.5[金属学及工艺—热处理] TG146.23[金属学及工艺—金属学]