Medical applications of nitinol tubes
志联
2025-04-23
Medical applications of nitinol tubes
Nitinol tubing is an intermetallic compound composed of approximately equal atomic ratios (50% NiTinol atoms and 50% titanium atoms), with a density of 6.45 g/cm³ and a melting point of 1240-1310℃. It possesses a two-phase crystalline structure of martensite and austenite, which transform into each other under certain conditions, exhibiting shape memory effect and superelasticity in the process. These are two important functions in medical applications.
Nitinol tubing should be welded using 304 stainless steel. The nitinol tube should be 1.8mm * 1.4mm. The stainless steel should be 2.5mm * 1.8mm. During welding, the nitinol tube is inserted into the stainless steel tube, and its depth should not exceed 4mm. Due to the thermal brittleness of the nitinol tube, welding is easily interrupted.
Nitinol tubing is a shape memory alloy. Shape memory alloys are special alloys that can automatically recover their plastic deformation to their original shape at a certain temperature. Its expansion rate is greater than 20%, its fatigue life is as high as 1 * 10⁷, its damping characteristics are 10 times that of ordinary springs, and its corrosion resistance is superior to currently available medical-grade stainless steel. Therefore, it can meet the needs of various engineering and medical applications and is an excellent functional material.
Keywords: Nitinol memory alloy flat wire_memory alloy wire_nitinol memory alloy sheet_nitinol memory alloy wire_memory alloy flat wire_memory alloy sheet_nitinol memory alloy
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