Applications of Nitinol memory alloy springs
志联
2025-04-21
The spring is made by winding TiNi shape memory alloy wire. It utilizes the one-way shape memory effect of shape memory alloys. After being stretched, it can automatically recover its original length as the temperature rises, acting as a temperature-sensitive driving component. This type of spring is also a typical structural form of industrial shape memory alloy components. After stretching, using hot water or hot air as a heat source, the temperature at which it returns to its original length is 65℃-85℃, and the original length is 80mm. The martensite phase (i.e., the phase organization at low temperature, where low temperature refers to room temperature) of the shape memory alloy is a soft phase, and the parent phase (i.e., the phase organization at high temperature, where high temperature refers to 65℃-85℃) is a hard phase.
Uses:
Shape memory alloys have a wide range of applications. For example, in machinery: clamping pins, pipe joints; in electronic instruments and equipment: fire alarms, connectors, integrated circuit brazing; in medicine: artificial heart valves, spinal correction rods, skull repair and shaping, oral orthodontics, and maxillofacial repair surgery, etc. It will also play a magical role in communication satellites, color televisions, temperature controllers, and toys, and will become a new type of material in modern navigation, aviation, aerospace, transportation, light textile, and other fronts. Shape memory alloys have been used in pipeline joining and automation control. Sleeves made of shape memory alloy can replace welding. The method is to fully expand the pipe end by approximately 4% at low temperature. During assembly, they are connected together. Once heated, the sleeve shrinks and recovers its original shape, forming a tight joint.
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