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World Scientific Publishing, International Journal of Modern Physics B, 06n07(23), p. 1968-1974

DOI: 10.1142/s0217979209061913

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Development of hot drawing process for nitinol tube

Journal article published in 2009 by Wei Chen, Weichen, H. Wang ORCID, Lei Zhang, Leizhang, Xiushan Tang, Xiushantang
This paper is available in a repository.
This paper is available in a repository.

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Abstract

In recent years, Nitinol, near-equiatomic nickel-titanium alloys, have found growing applications in medical technology and joining technology, due to their special characteristics such as shape memory, superelasticity and biocompatibility. The production of Nitinol tube cost-effectively remains a technical challenge. In this paper, we describe a hot drawing process for Nitinol tube production. A Nitinol tube blank and a metal core are assembled together. The assembly is hot drawn for several passes to a final diameter. The metal core is then plastically stretched to reduce its diameter and removed from the tube. Hot drawing process has been applied to Ni 50.7 Ti and Ni 47 Ti 44 Nb 9 alloys. Nitinol tubes of 13.6 mm outer diameter and 1 mm wall thickness have been successfully produced from a tube blank of 20 mm outer diameter and 3.5 mm thickness.