退火工艺对热变形TC21合金组织与性能的影响  

Effect of annealing on microstructure and properties of hot deformed TC21 alloy

作　　者：杨春林[1] 张松 欧梅桂[2] Yang Chunlin;Zhang Song;Ou Meigui(College of Chemistry and Materials Engineering,Guiyang University,Guiyang Guizhou 550003,China;College of Materials and Metallurgy,Guizhou University,Guiyang Guizhou 550025,China)

机构地区：[1]贵阳学院化学与材料工程学院,贵州贵阳550003 [2]贵州大学材料与冶金学院,贵州贵阳550025

出　　处：《金属热处理》2020年第3期133-139,共7页Heat Treatment of Metals

基　　金：贵州省一流大学专业建设项目(2017158134);贵州省科技厅项目(黔科合基础[2018]1027,黔科合支撑[2019]2165号);贵州省教育厅工程研究中心项目(黔教合KY字[2017]016);贵阳市科技局-贵阳学院科研专项资金(GYU-KYZ(2019~2020)PT23-05)。

摘　　要：研究了高温热变形后TC21合金棒材经一重及二重退火后其组织与性能的变化。结果表明:一重退火后,变形的α相在不同程度上发生了再结晶并等轴化,随退火温度升高,α相等轴化更为明显,且等轴α相粗化。二重退火后组织进一步等轴且均匀化,二重退火工艺略微降低了合金的强度,但是明显提高合金塑性。合金经过900℃×45 min,AC+590℃×4 h,AC处理后,断面收缩率提高了4.11%,伸长率提高了6.71%。The microstructure and properties of TC21 alloy bar after single and double annealing were studied.The results reveal that the deformedαphase is recrystallized and equiaxed to different extents after the single annealing.With the increase of annealing temperature,αphase is equiaxed more clearly and equiaxedαphase is coarsening.After the double annealing,the microstructure is further equiaxed and homogenized.The double annealing process slightly reduces the strength of the alloy,but significantly improves the plasticity of the alloy.After the treatment of 900℃×45 min,AC+590℃×4 h,AC,the section shrinkage rate and elongation rate of the alloy are increased by4.11%and 6.71%,respectively.

关 键 词：TC21合金 双重退火 热变形 组织 性能 

分 类 号：TG146.23[一般工业技术—材料科学与工程]