摘要
采用金相显微镜(OM)研究了热处理制度对ZTC4钛合金显微组织的演变规律,以及显微组织对力学性能的影响关系。结果表明:ZTC4钛合金铸件由马氏体α′相组成,进行退火以及热等静压+退火热处理后,显微组织均为典型魏氏组织。ZTC4钛合金铸件退火后抗拉强度可达955 MPa,其延伸率和断面收缩率分别为8.8%和13.1%。采用热等静压+退火热处理后,抗拉强度降低至892 MPa,但其延伸率和断面收缩率升高至11.2%和21.4%。采用热等静压热处理,可破碎原始β相晶粒,形成破碎的晶界α相,提高ZTC4钛合金塑性性能。
The optical microscope(OM)was employed to investigate the influence of heat treatment on microstructure evolution of ZTC4 titanium alloy,and the relationship between microstructure and mechanical properties was discussed.The results showed that the ZTC4 titanium alloy casting was composed of martensitic phaseα′.A typical Widmanstatten microstructure was always obtained after annealing or hot isostatic pressing followed by annealing heat treatment.The tensile strength of ZTC4 titanium alloy casting after annealing can reach 955 MPa,and its elongation and reduction of area were only 8.8%and13.1%,respectively.After hot isostatic pressing followed by annealing heat treatment,the tensile strength was reduced to 892 MPa,but its elongation and reduction of area were increased to 11.2%and21.4%.The hot isostatic pressing heat treatment can break the originalβphase grains,which improve the plastic properties of ZTC4 titanium alloy.
作者
冉兴
王哲
吕志刚
曹建
陈垚
杨朝荣
李培杰
Ran Xing;Wang Zhe;Lv Zhigang;Cao Jian;Chen Yao;Yang Chaorong;Li Peijie(Department of Mechanical Engineering,Tsinghua University,Beijing 100084,China;AVIC Heavy Machinery Co.,Ltd.,Guiyang 550005,Guizhou,China;Shaanxi Hongyuan Aviation Forging Co.,Ltd.,Xianyang 713801,Shaanxi,China;Guizhou Anji Aviation Precision Casting Co.,Ltd.,Anshun 561003,Guizhou,China)
出处
《钢铁钒钛》
CAS
北大核心
2022年第1期48-52,共5页
Iron Steel Vanadium Titanium
基金
两机重大专项基础研究(J2019-Ⅶ-002)。
关键词
ZTC4钛合金
热处理
显微组织
力学性能
ZTC4 titanium alloy
heat treatment
microstructure
mechanical properties
作者简介
冉兴(1968-),男,贵州松桃人,博士研究生,研究员,主要研究方向:熔模精密铸造,电话:0851-32208022,E-mail:2560680637@qq.com;通讯作者:李培杰,博士,教授,主要研究方向:轻合金材料成型,E-mail:lipj@mail.tsinghua.edu.cn。
