热处理工艺对TA15钛合金力学性能和耐磨性的影响  

Effect of heat treatment process on mechanical properties and wear resistance of TA15 titanium alloy

作　　者：袁飞 曹宇 何维均[1] 胥政 李俊杰 田宇禾 蒋斌[1] YUAN Fei;CAO Yu;HE Wei-jun;XU Zheng;LI Jun-jie;TIAN Yu-he;JIANG Bin(College of Materials Science and Engineering,Chongqing University,Chongqing 400045,China)

机构地区：[1]重庆大学材料科学与工程学院,重庆400045

出　　处：《材料热处理学报》2025年第1期30-40,共11页Transactions of Materials and Heat Treatment

基　　金：国防基础科研计划资助(JCKY2021110B050)。

摘　　要：采用退火热处理、双重热处理和β热处理3种不同工艺对锻态TA15钛合金进行热处理,研究不同热处理工艺对其力学性能和耐磨性能的影响规律。采用场发射扫描电镜和X射线衍射等微观表征技术揭示合金力学性能和耐磨性能演变的微观机理。结果表明,双重热处理态TA15钛合金的综合性能最好,组织为初生α、编织交错的片状α和少量的β转变基体构成的三态组织,其强韧匹配最佳,抗拉强度为1090.04 MPa,硬度为443.7 HV0.1,冲击韧性为40.90 J·cm^(-2),伸长率为19.39%。当摩擦磨损温度为25和500℃时,双重热处理态TA15钛合金的耐磨性能均为最佳,比磨损率分别为1.54×10^(-7)和5.58×10^(-7)mm^(3)·N^(-1)·m^(-1)。Three different heat treatment processes,namely annealing heat treatment,double heat treatment andβheat treatment,were used to conduct heat treatment on the forged TA15 titanium alloy,the effect of different heat treatment processes on its mechanical properties and wear resistance was studied.The characterization techniques such as field emission scanning electron microscopy and X-ray diffraction were used to reveal the microscopic mechanism of the evolution of mechanical properties and wear resistance of the alloy.The results show that the double heat-treated TA15 titanium alloy has the best comprehensive performance,with the microstructure composed of primaryα,braided interlaced lamellarαand a small amount ofβ-transformation matrix.Its strength and toughness achieve the best matching,with the tensile strength of 1090.04 MPa,the hardness of 443.7 HV0.1,the impact toughness of 40.90 J·cm^(-2),and the elongation of 19.39%.When the friction and wear temperatures are 25 and 500℃,the wear resistance of the TA15 titanium alloy after double heat treatment is the best,with specific wear rates of 1.54×10^(-7)mm^(3)·N^(-1)·m^(-1)and 5.58×10^(-7)mm^(3)·N^(-1)·m^(-1),respectively.

关 键 词：钛合金 力学性能 耐磨性能 微观组织 

分 类 号：TG146.2[一般工业技术—材料科学与工程]