TiNi-01 nickel-titanium alloy wire medical guide wire _ temperature

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Original Title: TiNi-01 Nickel-Titanium Alloy Wire Medical Guide Wire Superelastic TiNi-01 nickel-titanium alloy wire medical guide wired Nickel titanium material processing Based on NiTi alloy, it produces and sells medical nickel-titanium wire and nickel-titanium pipe; As well as the component range of the NiTi alloy which is a formed product formed by processing the nickel-titanium material, wherein the component range of the medical NiTi alloy conforms to the ASTM F2063-2012 or GB 24627 -2009 standard, and the adjustment range of Af temperature which can be realized by the NiTi material is -40C-85C nickel-titanium wire. Specification of NiTi alloy wire: Ф0.10 mm ~ Ф7.00 mm-Surface state of wire: oxidation state (including black surface oxidation state, blue oxidation state, amber oxidation state, etc.) Pickling state Bright state Grinding state-Dimensional tolerance range: determined according to the diameter range of the finished product. General: Wire diameter range corresponds to diameter tolerance range 4.00 ~ 2.00 mm ± 0.02 mm 2.00 ~ 1.00 mm ± 0.015 mm 1.00 ~ 0.35 mm ± 0.01 mm 0.35 ~ 0.26 mm ± 0.007 mm 0.26 ~ 0.15 mm ± 0.005 mm 0.15 ~ 0.0 8mm ± 0.004 mm If customers have special needs, please contact us at Yehan Industrial (Shanghai) Co., Ltd. Properties and characteristics of nickel-titanium alloy (I) Phase transformation and properties of nickel-titanium alloy As its name suggest, nitinol is a binary alloy of nickel and titanium that is subject to changes in temperature and mechanical stress that result in that existence of two different The same crystal structure phases, i.e., austenite phase and martensite phase. The phase transformation sequence of NiTi alloy during cooling is parent phase (austenite phase). -R phase-Martensitic phase. The R phase is rhombohedral, and the austenite is at a higher temperature (greater than the temperature at which the austenite starts). When, or when the load is removed (the external force is removed from Deactivation), the cube is hard. The shape is relatively stable. And horses The martensite phase is the state at a relatively low temperature (less than Mf: the temperature at which martensite ends) or when loaded (activated by an external force), Hexagonal, malleable, repetitive, less stable, more deformable. (II) Special properties of nickel-titanium alloy 1. Shape memory. Shape memory occurs when the parent phase of a certain shape is cooled from above Af temperature to Mf temperature. Aft that martensite is formed at a temperature below Mf, the martensite is deform at a temperature below Mf and heated to a temperature below Af, Automatically restores its shape in the parent phase. In fact, the shape memory effect is a thermally induced phase transformation process in NiTi alloys. 2. Superelastic The so-called superelastic means that the strain produced by the sample under the action of external force is much greater than the elastic limit strain. Strain, the phenomenon that strain can recover automatically when unloaded. That is to say, in the parent phase state, the stress is induced due to the action of the applied stress. Expand the full text Martensitic transformation occurs, so the alloy shows different mechanical behavior from ordinary materials, and its elastic limit is much larger than that of ordinary materials. And it no longer obeys Hooke's law. In contrast to shape memory properties, superelasticity is not thermally involved. All in all, hyperelasticity refers to a The hyperelasticity can be divided into linear hyperelasticity and nonlinear hyperelastic. Front The relationship between stress and strain in the stress-strain curve is nearly linear. Nonlinear hyperelasticity refers to the application of a force in a certain temperature range above Af. In the process of loading and unloading, the stress-induced martensitic transformation and its reverse transformation occur respectively, so the nonlinear superelasticity is also called pseudo-transformation. Resilience. The phase transformation pseudoelasticity of NiTi alloy can reach about 8%. The superelasticity of the nitinol alloy may vary with the conditions of the heat treatment When the archwire is heated above 400oC, the superelasticity begins to decrease. 3. Sensitivity of temperature change in oral cavity: The orthodontic force of stainless steel wire and CoCr alloy orthodontic wire is basically not affected by the temperature in oral cavity. Ring. The orthodontic force of the superelastic nitinol wire varies with the oral temperature. When the deformation is constant. The temperature rises, 3d titanium wire , The orthodontic force is increased. On the one hand, it can accelerate the movement of teeth, because the temperature change in the mouth will stimulate the appliance. Causing blood flow at the site of blood stasis, which causes capillary stasis, so that the repair cells can be fully repaired during tooth movement. To maintain its vitality and normal function. On the other hand, orthodontists cannot precisely control or measure the orthodontic force in the oral environment. 4. Corrosion resistance: Studies have shown that the corrosion resistance of nickel-titanium wire is similar to that of stainless steel wire. 5. Toxicity resistance: The nickel-titanium shape memory alloy has a special chemical composition, that is, it is a nickel-titanium alloy containing about 50% nickel. Nickel is known to have carcinogenic and cancer-promoting effects. In general, the surface layer of titanium oxide acts as a barrier, making the Ni-Ti alloy have a good Biocompatibility. TixOy and TixNiOy in the surface layer can inhibit the release of Ni. 6. Gentle orthodontic force: Currently, commercially available orthodontic wires include austenitic stainless steel wires, cobalt-chromium-nickel alloy wires, Nickel-chromium alloy wire, Australian alloy wire, gold alloy wire and ß titanium alloy wire. About these orthodontic correction wires in the tensile test and Load-displacement curve for three-point bending test condition. Nitinol also has the flattest plateau of the unloading curve, indicating that it is the most capable of providing support Long gentle orthodontic force. 7. Good shock absorption characteristics: The greater the vibration of the arch wire caused by chewing and bruxism, the greater the damage to the root and periodontal tissue. Big. It was found that the vibration amplitude of stainless steel wire was larger than that of superelastic nickel-titanium wire, The initial vibration amplitude of titanium archwire is only half of that of stainless steel wire. The good vibration and shock absorption characteristics of archwire are very important for the health of teeth. Traditional archwires, such as stainless steel wires, tend to aggravate root resorption. It is a high-tech production enterprise integrating smelting, development and production of high-temperature alloys, high-nickel alloys, nickel alloys, corrosion-resistant alloys, Inco alloys, Monel alloys and various special alloy materials. Products include pipes, bars, plates, wires, strips, flanges, forgings and pipe fittings. Products are used in petrochemical, aerospace, shipbuilding, energy, chemical industry,nickel titanium wire, electronics, environmental protection, machinery and instrumentation and other fields. 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