热处理工艺对TC21钛合金室温和高温力学性能的影响  

Effect of heat treatment process on mechanical properties at room temperature and high temperature of TC21 titanium alloy

作　　者：江龙[1] 赵文普[1] 张超群 Jiang Long;Zhao Wenpu;Zhang Chaoqun(China Airborne Missile Academy,Luoyang Henan 471000,China)

机构地区：[1]中国空空导弹研究院,河南洛阳471000

出　　处：《金属热处理》2025年第2期187-193,共7页Heat Treatment of Metals

摘　　要：通过设计不同的热处理工艺制备了不同α相片层分布的TC21钛合金,并通过时效控制二次α相的析出,结合室温和高温力学性能测试及分析结果,研究热处理对TC21钛合金室温和高温力学性能的影响。结果表明,TC21钛合金在980℃固溶后分别进行770、810和850℃退火处理,室温强度随着退火温度升高而降低,塑性随退火温度升高而增加;对退火后试样在550℃时效4 h,室温强度随着退火温度升高而升高,塑性随退火温度升高而降低;随着拉伸试验温度的升高,不同工艺热处理TC21钛合金的塑性提高,500℃时强度的保持率在65%以上,且850℃高温退火+550℃时效处理TC21钛合金在500℃以下使用时强度较高。TC21 titanium alloy with differentαphase lamella distributions was prepared by designing different heat treatment processes,and the precipitation of secondaryαphase was controlled by aging.Combined with the results of mechanical property testing and analysis at room temperature and high temperatures,the effect of heat treatment on mechanical properties at room temperature and high temperatures of the TC21 titanium alloy was studied.The results show that after solution treatment at 980℃,following by annealing at 770℃,810℃and 850℃,respectively,the strength at room temperature of the alloy decreases with the increase of annealing temperature,while the plasticity increases.After annealing and aging at 550℃for 4 h,the strength at room temperature of the alloy increases with the increase of annealing temperature,while the plasticity shows the opposite trend.With the increase of tensile test temperature,the plasticity of the TC21 titanium alloy treated by different processes is improved,and the strength retention rate is above 65%at 500℃,and the strength of TC21 titanium alloy annealed at 850℃and aged at 550℃is higher when used below 500℃.

关 键 词：TC21钛合金 热处理工艺 力学性能 

分 类 号：TG142.1[一般工业技术—材料科学与工程] TG156.5[金属学及工艺—金属材料]