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Melting of Nitinol

What is Nitinol?

As Nitinol emerges to find more and more applications in medical devices and commercial and industrial markets, understanding the effects of material processing becomes increasingly important. More so than other materials, the properties of Nitinol are significantly affected by its fabrication processes. There are abundant amounts of processing data available in the industry. However, they are often kept proprietary and not released publicly. This paper reviews available publications on Nitinol fabrication processes, such as melting, forming, shaping, treating, cutting, joining and finishing, etc., commonly employed or developed for manufacturing Nitinol material and components. The effects of these operations on the material properties are discussed.


Nitinol is well known for its thermomechanical properties of superelasticity and shape memory effect.

Along with excellent kink resistance, biocompatibility, and MRI compatibility, the alloy has emerged as a unique biomaterial finding increasing medical applications such as orthodontic wires, orthopedic devices, guide wires, stents, filters, and components in minimally invasive surgical devices. Development and growth of Nitinol applications in the industrial and commercial markets have also been fairly strong in recent years. Eyeglass frames, cellular phone antennae, high-pressure sealing plugs for diesel fuel injectors, and over-temperature protection devices for lithium-ion batteries are among the applications experiencing significant growth. As more Nitinol products are being developed and produced on a mass scale, controlling manufacturing processes to deliver consistent quality becomes increasingly important. Nitinol properties are extremely sensitive to the initial chemistry and subsequent processing. The alloy's flexibility, significant work-hardening rate, and high titanium content pose additional challenges in metal fabrication. Understanding various manufacturing processes and their effects on product performance is the key to successful process controls. Although significant efforts have been devoted to understanding Nitinol processing issues, a large amount of the information has been kept proprietary. The present paper reviews available public information related to melting, fabrication, secondary processing methods, and finishing techniques commonly used to manufacture Nitinol products. The review also includes novel processing methods currently in development.


Melting of Nitinol

General Nitinol, chemistry, and trace elements requirements are defined in an ASTM standard, F2063-00. The Nitinol transformation temperatures are extremely sensitive to a small Ni or Ti concentration variation. The sensitivity increases with Ni content in the alloy. For alloys having greater than 55.0 weight percent Ni, a one weight percent deviation in Ni (or Ti) Proceedings of the International Conference on Shape Memory and Superelastic Technologies, Kunming, China, P.285-292 (2001). 2 concentration will result in approximately a 100°C shift in transformation temperatures. This extreme sensitivity requires any melting practice to tightly control the Ni and Ti ratio to meet the required tolerance in transformation temperatures.


Price of Nitinol

Nitinol particle size and purity will affect the product's Price, and the purchase volume can also affect the cost of Nitinol. A large amount of large amount will be lower. The Price of Nitinol is on our company's official website.


Nitinol supplier

Mis-Asia is a reliable and high-quality global chemical material supplier and manufacturer. It has over 12 years of experience providing ultra-high quality chemicals and nanotechnology materials, including Nitinol, nitride powder, graphite powder, sulfide powder, and 3D printing powder. If you are looking for high-quality and cost-effective Nitinol, you are welcome to contact us or inquire at any time.

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