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2. 发明申请

WO2010127646A2 A METHOD OF HEAT TREATMENT AND/OR INSPECTION OF FUNCTIONAL MECHANICAL PROPERTIES, PARTICULARLY TRANSFORMATION STRAIN AND/OR STRENGTH, OF SHAPE MEMORY ALLOY FILAMENTS AND APPARATUS FOR THE APPLICATION OF THIS METHOD 审中-公开
标题翻译：功能性机械特性的热处理和/或检查方法，特征转变应变和/或强度，形状记忆合金薄膜和本方法的应用
公开(公告)号：WO2010127646A2
公开(公告)日：2010-11-11
申请号：PCT/CZ2010/000058
申请日：2010-05-04
申请人： INSTITUTE OF PHYSICS AS CR, v. v. i. , PILCH, Jan , SITTNER, Petr
发明人： PILCH, Jan , SITTNER, Petr
IPC分类号： C22F1/10
CPC分类号： C22F1/10 , C22F1/006
摘要： This invention introduces a method and equipment for nonconventional thermo-electro- mechanical treatment of continuous and discontinuous SMA filaments, particularly NiTi, allowing for setting their functional mechanical properties, particularly transformation strain and/or strength, as required by the user. Heat treatment of continuous SMA filaments is realized on an apparatus consisting of respooling system with driving units for feeding and taking spools and at least two electrical contacts allowing conductive for electrical contact of the respooled filament and electric current source. When applying the method, an effective filament temperature is first evaluated from the interpolated experimentally determined dependence of transformation strain and/or strength of the filament achieved by range of heat treatments characterized by various effective filament temperatures and tensile stress. Heat treatment is then performed by supplying the electric power calculated from this effective filament temperature to the segment of the treated SMA filament. Heat treatment can also be performed utilizing on-line control of the supplied electric current in a feedback to the on-line measured filament temperature and/or change of electric resistance before and after the treatment. Compared to currently used conventional heat treatment of SMA filaments in environmental furnace, the filament treated by the present method is exposed to much higher temperatures for much shorter time allowing for efficient, less energy consuming and compact heat treatment of continuous SMA filaments for applications in technical textile production. Functional mechanical properties different from those achievable by conventional heat treatment can be given to the treated SMA filaments. In addition, this invention introduces a method for inspection of the homogeneity of continuous SMA filaments consisting in measurement of the electrical resistance, temperature and/or characteristics of the ultrasonic signal passing through the filament during respooling. The homogeneity of the SMA filament is evaluated as the deviation of the actually measured value of one of these quantities from the expected value. The method is realized on apparatus with respooling system and sensors of the above introduced signals.
摘要翻译：本发明介绍了一种用于非常规热电机械处理连续和不连续SMA丝，特别是NiTi的方法和设备，允许根据使用者的要求设定它们的功能机械性能，特别是转变应变和/或强度。连续SMA丝的热处理实现在由具有用于进给和取出线轴的驱动单元的回送系统和至少两个电触点组成的装置上，所述电触点允许用于电动丝和电流源的电接触的导电。当应用该方法时，首先通过内插的实验确定的相变应变的依赖性和/或通过以各种有效的丝条温度和拉伸应力为特征的热处理范围实现的丝的强度来评估有效的长丝温度。然后通过将由该有效灯丝温度计算出的电力提供给经处理的SMA灯丝的段进行热处理。热处理也可以通过对在线测量的灯丝温度的反馈和/或处理之前和之后的电阻的变化来提供所提供的电流的在线控制来执行。与目前在环境炉中使用的常规SMA丝的热处理相比，通过本方法处理的细丝在更高的温度下暴露更短的时间，从而有效地，较少的能量消耗和紧凑的连续SMA丝的热处理用于技术应用纺织生产。可以对经处理的SMA丝进行与通过常规热处理可实现的功能性能不同的功能性机械性能。另外，本发明还介绍了一种用于检测连续SMA丝的均匀性的方法，该方法包括测量在呼吸过程中通过细丝的超声波信号的电阻，温度和/或特性。 SMA丝的均匀性被评估为这些量之一的实际测量值与预期值的偏差。该方法在具有上述引入信号的呼吸系统和传感器的装置上实现。

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