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依据d-电子理论设计了低弹性模量、中高强度、良好塑性和生物相容性的新型生物医用近β型Ti35Nb2-Sn6Zr3Mo合金,研究了固溶温度和时效温度对合金组织和力学性能的影响。结果表明:随固溶温度的升高,合金的平均晶粒尺寸逐渐增大,650℃以上固溶时,得到单一等轴β晶组织;固溶温度对合金的强度和弹性模量的影响并不明显。随时效温度的升高,由于Ti35Nb2Sn6Zr3Mo合金的β相稳定性较强,析出α相的含量较少,从而导致合金的力学性能对时效温度并不敏感。
Based on the d-electron theory, a novel biomedical near-β Ti35Nb2-Sn6Zr3Mo alloy with low elastic modulus, medium-high strength, good ductility and biocompatibility was designed. The effects of solution temperature and aging temperature on the microstructure and mechanical properties of the alloy were studied . The results show that as the solution temperature increases, the average grain size of the alloy increases gradually, and when the solid solution temperature is higher than 650 ℃, the single equiaxed β crystal structure is obtained; and the effect of solution temperature on the strength and elastic modulus of the alloy Not obvious. With the increase of aging temperature, due to the high β phase stability of Ti35Nb2Sn6Zr3Mo alloy, the content of α phase precipitated is less, which leads to the alloy mechanical properties are not sensitive to the aging temperature.