Ti75合金挤压加工对组织与性能的影响  

Effects of Extrusion on Microstructure and Properties of Ti75 Alloy Tubes

作　　者：陶欢[1] 宋德军[1] 许飞凡 李冲[1] 郁炎[1] TAO Huan;SONG Dejun;XU Feifan;LI Chong;YU Yan(Luoyang Ship Material Research Institute,Luoyang 471023,China;First Military Representative Office of the Navy in Dalian District,Dalian 116005,China)

机构地区：[1]中国船舶重工集团公司第七二五研究所,河南洛阳471023 [2]海军驻大连地区第一军事代表室,辽宁大连116005

出　　处：《材料开发与应用》2020年第5期7-11,共5页Development and Application of Materials

基　　金：“十三五”装备预研项目(41423040313)。

摘　　要：采用热挤压方法制备Ti75合金管,研究了挤压温度和挤压速度对Ti75合金管组织与性能的影响。结果表明,在试验条件下,挤压温度的高低影响Ti75合金α晶粒的形状以及α相的含量,挤压温度由800℃升高至850℃,初生α相含量降低,β转变组织中细针状的α相变圆变粗,球化明显,同时合金的强度下降,塑性略微上升;挤压速度在60~80 mm/s范围内,合金显微组织变化不明显,室温拉伸性能也基本相同。Ti75 alloy tubes were prepared by using hot extrusion method, and the effects of extrusion temperature and extrusion speed on microstructure and properties studied. The results show that the extrusion temperature has significant influence on both shape and content of α phase. When the extrusion temperature increases from 800 ℃ to 850 ℃, the volume fraction of primary α phase decreases, and the balling of the acicular α phase in transformed β, with the α phase becoming round and coursing. Meanwhile, strength of the alloy decreases and the ductility improves slightly. The extrusion speed of between 60 mm/s to 80 mm/s has limited effect on the microstructure and properties of the alloy.

关 键 词：TI75合金 热挤压 显微组织 力学性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]