提 要 目的 提出一种弯制镍钛丝的方法，以期对这种高弹性形状记忆钢丝重新定形、加弯制司匹氏曲度及多种微小弯曲。方法 利用点焊-加热三用机的加热装置配合热处理钳等，对镍钛丝进行通电加热，从而达到弯制后定形的目的。结论 当给镍钛丝加上比Af点高60℃以上的温度时，则相变引起的形状恢复应力超过丝材本身的屈服应力，合金形状记忆特性被部分影响。利用该方法可再次确定镍钛丝的形状，对提高矫治疗效极其有利。
Bending and Heat-molding of Ni-Ti Orthodontic Wires
Yao Sen, et al.
Center of Orthodontics, 174 Hospital of PLA, Xiamen 361003,
Abstract objective Aim of this paper is to introduce a bending method for Ni-Ti orthodontic wire, in roder to remold, put Spee’s curves and other micro-bends to this super-elasticity and shape memory alloy wire.Method To electrify-heat the Ni-Ti wire. with a Heat Treat Device and two Pliers which connected to the Device, in order to bend and remold the Ni-Ti wire.Conclusion When the Ni-Ti wire was heated over 60℃ than point Af, the shape recovery stress caused by the transformation is larger than the bend stress of alloy wire itself, and shape memory characteristic of the alloy was affected partly, so the Ni-Ti wire shape can be changed by the method, this will be useful to satisfying orthodontic results.
Key words Ni-Ti wrieBend Heattreatment
材料与方法
仪器与材料
仪器：西安天隆新技术研究所研制的FS-4000齿科点焊-加热三用机（包括加热装置及热处理钳）。
镍钛丝：北京有色金属研究总院生产的预成弓型镍钛丝（批号：970305）：
圆丝：.016”；方丝：.018”×.025”。
