Medical titanium alloy.

Titanium non-toxic, high light, strength and has excellent biocompatibility, is ideal for medical metal materials, can be used as implanted human implants and the like. Currently, in the medical field is still widely used Ti-6Al-4v ELI alloys. But the latter will precipitate a very small amount of vanadium and aluminum ions, reducing their cell adaptation and possibly cause harm to humans, this issue has already caused widespread concern in the medical profession. Qiang States early in the 20th century the mid-1980s began to develop non-aluminum, non-vanadium, biocompatible titanium alloy, which is used in orthopedic surgery. Japan, the United Kingdom also has done a lot of the research work, and made some new progress. For example, the Japanese have developed a range of α + β titanium alloy having excellent biocompatibility, including Ti-15Zr-4Nb_4ta-0.2Pd, Ti-15Zr-4Nb-aTa-0.2Pd-0.20 ~ 0.05N, Ti-15Sn -4Nb-2Ta-0.2Pd and Ti-15Sn-4nb-2Ta-0.2Pd-0.20, corrosion strength of these alloys, fatigue strength and corrosion resistance are better than Ti-6Al-4v ELI. Compared with the α + β titanium alloy, β titanium alloy having a higher strength almost water, and better performance and notch toughness is more suitable as an implant implanted in the human body. In the US, there are five kinds of β titanium alloys are recommended to the medical field, namely TMZFTM (TI-12Mo- ^ Zr-2Fe), Ti-13Nb-13Zr, Timetal 21SRx (TI-15Mo-2.5Nb-0.2Si), Tiadyne 1610 (Ti-16Nb-9.5Hf) and Ti-15Mo. Estimated that in the near future, such a high strength, low modulus of elasticity and excellent formability and corrosion resistance of titanium House is likely to replace the current widely used in the medical field Ti-6Al-4V ELI alloy [28'32 ].