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熱處理對Ti30Nb5Ta6Zr合金組織和力學(xué)性能的影響
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Influence of Heat Treatment on Microstructure and Mechanical Properties of Ti30Nb5Ta6Zr Alloy
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    摘要:

    根據(jù)β穩(wěn)定化系數(shù)kβ和d-電子理論設(shè)計了低彈性模量、中高強(qiáng)度、良好塑性和生物相容性的新型牙科種植用近β型Ti30Nb5Ta6Zr合金，研究了合金在β相區(qū)固溶和時效處理后組織和力學(xué)性能的變化規(guī)律。結(jié)果表明，在β相區(qū)固溶水淬后組織為亞穩(wěn)β相。低溫時效時析出ω相，隨著時效溫度的升高，逐漸析出α相。合金的強(qiáng)度和彈性模量隨時效溫度的升高先升高后下降；延伸率先降低后升高。合金在800 ℃固溶+500 ℃時效后綜合力學(xué)性能優(yōu)良，可以滿足牙科植入要求

    Abstract:

    A new β-type alloy Ti30Nb5Ta6Zr for dental implant with low Young’s modulus, medium-high tensile strength, good plasticity and biocompatibility was designed according to β coefficient of stabilization kβ and d-electron theory. The change of microstructures and mechanical properties for the alloy after solution treatment followed by aging in β phase region was investigated. It is found that the alloy is composed of metastable β phase after solution treatment in β phase region; ω phase precipitates when aged at low temperature, while α phase precipitates gradually when the aging temperature increases. With the aging temperature increasing, the strength and Young’s modulus of the alloy increase first and then decrease, while the elongation of the alloy decreases first and then increases. The alloy after 800 oC, 30 min solution treatment and 500 oC, 12 h aging possesses excellent integrated mechanical properties and can meet the requirement for dental implant

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顧桂月,陳 鋒,張 強(qiáng),余新泉.熱處理對Ti30Nb5Ta6Zr合金組織和力學(xué)性能的影響[J].稀有金屬材料與工程,2010,39(4):678~681.[Gu Guiyue, Chen Feng, Zhang Qiang, Yu Xinquan. Influence of Heat Treatment on Microstructure and Mechanical Properties of Ti30Nb5Ta6Zr Alloy[J]. Rare Metal Materials and Engineering,2010,39(4):678~681.]
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  • 收稿日期:2009-04-30
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