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材料工程  2013 

退火工艺对大形变冷轧Ti-35Nb-9Zr-6Mo-4Sn医用钛合金组织和力学性能的影响

DOI: 10.3969/j.issn.1001-4381.2013.11.004, PP. 20-25

Keywords: Ti-35Nb-9Zr-6Mo-4Sn合金,组织,再结晶,强度,弹性模量

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Abstract:

以新型医用钛合金Ti-35Nb-9Zr-6Mo-4Sn为对象,研究了该合金经固溶处理、85%冷变形和再结晶退火后的组织和力学性能。研究表明该合金经固溶处理和85%冷变形后均由单一的β相构成。冷变形使合金强度显著上升,弹性模量降低,伸长率略有下降。经650℃再结晶退火后,合金仍由单一的β相构成,晶粒显著细化。随着退火时间的延长,缺陷减少,再结晶比例增高,合金的强度略有降低,弹性模量有所升高,塑性显著改善。形变率为85%的Ti-35Nb-9Zr-6Mo-4Sn合金经650℃退火30~60min后,合金的强度和伸长率显著优于Ti-6Al-4V,综合力学性能优异,适合作为医用种植材料。

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