系统研究了不同合金添加元素(Mo、Zr、Nb)、加工及热处理对近β型医用钛合金力学性能和显微组织的影响规律,讨论保持医用钛合金生物力学相容性匹配的影响因素和方法.研究发现:TiNbzrMo合金中增加Zr、Mo元素含量使合金强化,而增加Mo、Nb元素含量和热加工率利于降低弹性模量.经过固溶处理后强度和弹性模量降低,而时效处理后合金产生弥散强化和细晶强化使强度和弹性模量提高.新合金冷热加工性能好,无明显各向异性,经过适当热处理可以达到高强度、低弹性模量和优良的塑韧性、疲劳性能综合匹配.
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