Effect of heat treatment conditions on the mechanical properties of Ti-6Mo-4Sn alloy for orthodontic wires.
Effect of heat treatment conditions on the mechanical properties of Ti-6Mo-4Sn alloy for orthodontic wires.
复制标题
热处理条件对正畸钢丝用Ti-6Mo-4Sn合金力学性能的影响
DOI：
10.4012/dmj.2012-118
复制
发表时间：
2013
影响因子：
2.5
通讯作者：
S. Goto
中科院分区：
文献类型：
--
作者：
M. Hida;K. Miyazawa;S. Tsuruta;M. Kurosawa;Yukihiro Hata;T. Kawai;S. Goto
β钛合金经常用于金属过敏患者的无镍正畸钢丝。然而，β钛合金丝的杨氏模数低于Co-Cr-Ni合金丝，导致支抗丧失，无法防止不必要的牙齿移动。为了提高钛钼锡合金丝在横腭弓等锚具中的力学性能，对其在300、400、500和600℃下分别进行了5min、30min和4h的热处理。拉伸测试表明，在500℃/30min加热时，钢丝的杨氏模数为75 GPA，拉伸强度为1,650兆帕，是所有热处理组中最高的。因此，在500℃/30min热处理的Ti-6Mo-4Sn合金线材的力学性能接近于目前用于固位体和横弓的线材。
β-titanium alloy is frequently used in nickel-free orthodontic wires for patients with a metal allergy. However, the Young's modulus of β-titanium alloy wires is lower than that of Co-Cr-Ni alloys, causing loss of anchorage and failure to prevent unwanted tooth movements. To improve its mechanical properties for use in anchorage appliances such as transpalatal arches, Ti-6Mo-4Sn alloy wire was heat-treated at 300, 400, 500 and 600 °C for 5 min, 30 min, and 4 h in this study. Tensile testing revealed that the wire heated at 500 °C/30 min had a Young's modulus of 75 GPa and a tensile strength of 1,650 MPa - the highest among all the heat treatment groups. Therefore, Ti-6Mo-4Sn alloy wire heat-treated at 500 °C/30 min yielded mechanical properties approximating those of wires currently used for retainers and transpalatal arches.