热连轧工艺制备TC4钛合金无缝管材组织及力学性能研究  

Study on Microstructure and Mechanical Properties of TC4 Titanium Alloy Seamless Pipe by Hot Continuous Rolling Process

作　　者：屈磊 辛社伟[1] 李婷[1] 杜宇 邹磊 应扬 郭荻子[1] 王晓 Qu Lei;Xin Shewei;Li Ting;Du Yu;Zou Lei;Ying Yang;Guo Dizi;Wang Xiao(Northwest Institute for Nonferrous Metal Research,Xi’an 710016,China;Xi’an QinTi Intelligent Manufacturing Technologies Co.,Ltd.,Xi’an 710016,China)

机构地区：[1]西北有色金属研究院,陕西西安710016 [2]西安秦钛智造科技有限公司,陕西西安710016

出　　处：《钛工业进展》2022年第5期13-16,共4页Titanium Industry Progress

基　　金：装备预先研究项目(41422060206);陕西省重点研发计划项目(2022GY-213)。

摘　　要：采用热连轧机组制备出∅108 mm×14.5 mm×L的TC4钛合金无缝管材,测试分析了管材热处理前后的显微组织和力学性能。结果表明:热连轧工艺生产的TC4钛合金无缝管材力学性能优良,组织呈现变形的过渡组织形貌,主要由大量扭曲变形的片层状α相以及未完全破碎的β晶界组成。经热处理后,组织形貌均匀,晶内片层α相变为棒状α相,晶界α相发生再结晶形成球状α相。TC4钛合金无缝管材经固溶时效处理后力学性能得到提升,其R_(m)≥995 MPa,R_(p0.2)≥931 MPa,A≥15%。TC4 titanium alloy seamless pipe with∅108 mm×14.5 mm×L was prepared by hot continuous rolling mill.The microstructure and mechanical properties of pipe were analyzed.The results show that the TC4 titanium alloy seamless pipe produced by hot continuous rolling process has fine mechanical properties,and the microstructure of the pipe shows deformed transitional microstructure,which is mainly composed of a large number of distorted lamellarαphase andβgrain boundaries that are not completely broken.After heat treatment,the microstructure of the pipe is uniform,the intra-crystalline lamellarαphase become rod-likeαphase,the grain boundaryαphase recrystallized and spherodized to form globularαphase.The mechanical properties of TC4 titanium alloy seamless pipe are improved by solution aging treatment,with R_(m)≥995 MPa,R_(p0.2)≥931 MPa and A≥15%.

关 键 词：钛合金 热连轧 无缝管材 显微组织 力学性能 

分 类 号：TG337.6[金属学及工艺—金属压力加工] TG146.23[一般工业技术—材料科学与工程]