【摘要】 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。更多还原

【Abstract】 Microstructure and properties of Ti-15Mo-3Nb alloy in different treatment conditions were studied.The recrystallization annealing temperature of the alloy was determined according to phase diagrams and the simulation result by JMatPro-4.0 soft.The results show that the microstructure and properties of as-cast and forged Ti-15Mo-3Nb alloy are unstable.The microstructure of the alloy after recrystallization annealing treatment or solution and aging treatment is refined.At the same time,their compressive strength increases greatly.The compressive elastic modulus of the alloy after recrystallization annealing treatment is 19.4 GPa nearly to that(17-18.9 GPa) of human body compact bone,which will make it more satisfactory in biomechanical adaptability as surgery implants.更多还原