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Shape memory alloy thermal shrink rings (referred to as: memory rings) are made using the memory recovery characteristics of shape memory alloys. Parts are simply placed and heated above a specified temperature for self-installation of the relevant fasteners. Features: 1. Assembled products can be used stably in environments ranging from -50℃ to 250℃. 2. Easy installation and operation; fastening is achieved simply by heating to a specified temperature, providing stable fastening force. 3. Weld-free, corrosion-resistant, vibration-resistant, impact-resistant, and fatigue-resistant with a long lifespan.
Weaving is a process of combining linear, ribbon-shaped, or tubular materials (such as fibers, yarns, grass stems, wires, etc.) into products with certain structures and functions by crossing, winding, and interlacing. It is one of the oldest human handicrafts and is widely used in daily life, artistic creation, industrial production, and other fields. The following is a discussion of its definition, history, classification, process principles, application scenarios, and cultural significance.
Nickels are chemically active and prone to forming oxide films, which affect performance and require surface treatment. Common methods include mechanical polishing (using sandpaper or other tools to improve finish); chemical treatment (using acid or alkaline cleaning to remove oxide films and impurities); electrochemical treatment (such as anodizing to enhance corrosion resistance and electropolishing to achieve a mirror finish); and coating (using processes such as PVD, CVD, and spraying to enhance wear resistance, corrosion resistance, and biocompatibility).
The shape memory effect of nickel originates from the phase transformation between martensite and austenite. The AF temperature (austenite transformation end temperature) is the key node, and its transformation is affected by composition and process.
Wire cutting of nickel products is based on the principle of electro-erosion. Using a molybdenum or copper wire electrode, spark discharges are generated between the electrode and the workpiece under the action of a high-frequency pulsed power source, gradually removing the material to achieve cutting. It offers the advantages of high precision and the ability to process complex shapes, making it commonly used in the manufacture of medical stents and precision parts. However, wire cutting is slow, and the high temperatures generated by the discharges can affect the superelasticity and memory properties of nickels. Therefore, controlling cutting parameters and selecting an appropriate working fluid are crucial to ensure product quality.
Nickel products are commonly used in medical devices, aerospace, and other fields due to their superelasticity, shape memory effect, and excellent biocompatibility. Their delicate and complex structures make traditional processing methods difficult to meet the precision requirements. However, laser cutting, with its high-energy-density beam, instantly melts and vaporizes the material, and uses high-pressure gas to remove slag, makes it an ideal processing method.
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NiTinol -Titanium Memory Alloy Wire | NiTinol Spring | NiTinol - Fastening Ring
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