Ti-Nb-Zr-Mo合金假肢关节精密铸件凝固组织与力学性能研究

摘要

采用水冷铜坩埚感应熔炼技术及陶瓷型壳铸造了人体假肢关节 Ti-Nb-Zr-Mo合金精密铸件.利用光学显微镜XRD、SEM、TEM观察和分析了铸件的凝固组织 并且在25℃、0℃、-25℃、-50℃温度下测试了拉伸性能和弹性模量.结果表明,合金的凝固组织是由β+α相组成,合金具有较高的强度,随着温度的降低合金的强度升高,伸长率降低,弹性模量保持在70 GPa左右.%Ti-Nb-Zr-Mo alloy precision casting of artificial limb joint was prepared by water jacketed copper crucible induction melting furnace and ceramic shell. The solidification structure of casting was observed by XRD, SEM and TEM, and the tensile property and Young's modulus were investigated at 25 ℃, 0 ℃, -25 ℃ and -50 ℃. The results show that the solidification structures are composed of β phase and α' phase. The tensile strength increases, and the elongation decreases with decreasing temperature. The Young's modulus is 70 GPa.