新型医用钛合金Ti-39Nb-6Zr显微组织和力学性能的研究  

Study on Microstructure and Mechanical Properties of Ti-39Nb-6Zr Alloy for Biomedical Applications

作　　者：王艳玲[1] 惠松骁[1] 叶文君[1] 米绪军[1] 

机构地区：[1]北京有色金属研究总院有色金属材料制备加工国家重点实验室,北京100088

出　　处：《热加工工艺》2009年第14期36-40,共5页Hot Working Technology

摘　　要：通过室温拉伸试验、光学显微镜、透射电镜等分析方法,研究热处理工艺对Ti-39Nb-6Zr合金显微组织和力学性能的影响。实验结果表明:合金在900℃固溶0.5h后,抗拉强度和屈服强度随冷却速率降低而升高,即抗拉强度值大小关系为:水淬<空冷<炉冷;合金在350℃低温时效后弥散析出ω相,ω相为高温时效时α相析出提供有利形核位置,有利α相均匀析出,α相有强化基体作用,能提高合金强度和弹性模量,当热处理制度为900℃×0.5 h,AC+350℃×4 h+450℃×24 h AC时,合金抗拉强度、屈服强度最大,分别为710和670 MPa,弹性模量为65.4 GPa。The microstructure and mechanical properties of Ti-39Nb-6Zr alloy after different heat treatment processes were investigated by optical microscope and transmission electron microscope, room temperature tensile test. The results show that： after solid solution for 0.5 h at 900 ℃, tensile strength and yield strength of the alloy increase as the cooling rate decreases, the relationship of tensile strength is FC〉AC〉WQ. There is dispersed precipitation of ω phase during aging at 350 ℃ ; The existing to phase can offer advantaged location for α phase＇s precipitation, then α phase can precipitate equably, α phase has a function of strengthening the substrate, improving the strength and Young＇s modulus; while the heat treatment condition is 900 ℃ × 0.5 h AC＋ 350℃ × 4 h ＋ 450℃ ×24 h AC, the tensile strength and yield strength have maximum values： 710 MPa, 670 MPa, respectively, the Young＇s modulus is 65.4 GPa.

关 键 词：医用钛合金 热处理 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] TG113[金属学及工艺—金属材料]