医用低弹性模量Ti合金的设计与工艺研究

Design and Process Study on Ti-alloy With Low Elastic Modulus for Medicine

通过d电子合金设计理论和相图理论设计并制备了医用低弹性模量Ti-12Nb-12Zr-2Mo合金。通过X射线衍射、扫描电镜对该合金的显微组织进行了分析,并对力学性能进行了测量。采用水冷铜坩埚感应熔炼技术并结合熔模精密铸造工艺制备了Ti-12Nb-12Zr-2Mo合金的人体上关节体铸件,采用X射线探伤技术对铸件的内部缺陷进行了检测。结果表明,该合金具有较低的弹性模量和较高的拉伸强度;上关节体铸件满足实际使用要求。

Ti-12Nb-12Zr-2Mo alloy with low elastic modulus for medicine was designed and prepared by d-electron alloy design and phase diagram theory. The microstructure of the alloy was analyzed by using X-ray diffraction and scanning electron microscope. And the mechanical properties were measured. The human upper joint body castings of Ti-12Nb-12Zr-2Mo alloy were prepared by using water jacketed copper crucible induction melting technology and investment precision casting process. The internal defects of castings were detected by using X-ray flaw detection technology. The results show that the alloy has low elastic modulus and high tensile strength; the castings of the upper joint body meet the actual using requirement.