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对医用Ti-15Mo-3Nb合金熔炼、锻造、热处理过程中发生的组织和性能的变化进行的研究。并结合相图与JMatPro-4.0软件的模拟结果来确定再结晶退火温度。结果表明,铸态和锻态下的Ti-15Mo-3Nb医用β钛合金的组织和性能很不稳定,不适合直接用于临床。该合金经再结晶退火或固溶时效处理后,合金组织均被细化,抗压强度提高,且再结晶退火后,该合金的压缩弹性模量为19.4 GPa,与人体密质骨的(17-18.9GPa)最为接近,更能满足其作为植入体对生物力学适应性的要求。
Research on the changes of microstructure and properties occurred in the process of smelting, forging and heat treatment of medical Ti-15Mo-3Nb alloy. The recrystallization annealing temperature was determined by the simulation results of phase diagram and JMatPro-4.0 software. The results show that the microstructure and properties of Ti-15Mo-3Nb medical β titanium alloy under cast and as-forged condition are unstable and not suitable for direct clinical application. The alloy after recrystallization annealing or solution aging treatment, the alloy structure are refined, the compressive strength increases, and after recrystallization and annealing, the alloy’s compressive elastic modulus of 19.4 GPa, and the human body bone (17 -18.9GPa) closest to meet the more as biomechanical adaptability requirements of the implant.