等温处理对TC4钛合金组织和性能的影响  

Effect of isothermal treatment on microstructure and mechanical properties of TC4 titanium alloy

作　　者：宋洪超[1] 梁益龙[1] 王攀智[1] 钟应[1] 

机构地区：[1]贵州大学材料与冶金学院,贵州贵阳550025

出　　处：《金属热处理》2013年第11期18-20,共3页Heat Treatment of Metals

基　　金：航空级TC4钛合金关键技术研究(黔科合GZ字[2011]3001)

摘　　要：分析了两相区(α+β)等温温度和时间对TC4钛合金组织和力学性能的影响。结果显示,在相同等温时间内,温度越高,片层α向β组织的转变越充分,组织越均匀细小,合金的强度和塑性上升。在同一等温温度下,随时间延长,α相不断溶入β相,而在等温后期发生了逆转变。逆转变使合金的强度下降,断面收缩率和伸长率上升。Effects of isothermal temperature and time on microstructure and mechanical properties of TC4 titanium alloy were investigated at （α＋β） two-phase zme. The results show that under the same isothermal time, the higher the temperature, the more sufficient the lamella α phase transforms to β phase, the more unifiom and finer the microstmcture is, and the strength and plasticity of the alloy increase. At the same isothermal temperature, with the time prolonging, the α phase continuously transforms into β phase, however the reverse transfrmation takes place at the later stage. This reverse transformation decreases strenh of the alloy, and increases the reduction of area and elongation.

关 键 词：TC4钛合金 等温温度 等温时间 显微组织 力学性能 

分 类 号：TG146.23[一般工业技术—材料科学与工程]