Chapter 3
Study on Improving the Performance
of Nitinol Cardiovascular Stent by “Fiber
Laser—Electropolishing”
Xiaoyu Sun, Xiuting Wei, Zhiyong Li, Deda Lou, Yongqi Wang,
and Hanqing Liu
Abstract High performance cardiovascular stent plays an important role in solving
cardiovascular disease. In order to improve the surface integrity and biocompatibility of cardiovascular stents, the collaborative manufacturing process of “fiber
laser-electropolishing” was studied. Through experiments and comparative analysis,
the surface integrity and biocompatibility of cardiovascular stent by collaborative
process were better than that of single laser cutting. The surface of the cardiovascular stent was bright and smooth, without dross and heat damage. The surface roughness of the cardiovascular stent reached tens of nanometers, and a layer of titanium
dioxide protective film was generated on the surface. So the process could improve
the surface integrity and biocompatibility of cardiovascular stent. In addition, the
process used alcohol-salt non-toxic electrolyte for electropolishing, which improved
the environmental friendliness of the process. Finally, this process can produce highquality cardiovascular stent, which is of great significance to the cardiovascular stent
manufacturing industry and has bright application prospects.
Keywords Nitinol cardiovascular stents · “Fiber laser-electropolishing”
collaborative manufacturing · Surface integrity · Process technology · Non-toxic
electrolyte
3.1 Introduction
The incidence rate of cardiovascular diseases is high and the increasing trend is
accelerating [1–3]. Most patients with cardiovascular disease need to be implanted
with cardiovascular stents. Therefore, cardiovascular stents have great social needs.
However, the manufacturing process of cardiovascular stent determines its surface
X. Sun · X. Wei (B) · Z. Li · Y. Wang · H. Liu
School of Mechanical Engineering, Shandong University of Technology, Zibo 255049, China
e-mail: wxt@sdut.edu.cn
D. Lou
Weihai Visee Medical Device Co., Ltd., Weihai 264200, China
© The Author(s), under exclusive license to Springer Nature Switzerland AG 2021
J. Xu and K. M. Pandey (eds.), Mechanical Engineering and Materials,
Mechanisms and Machine Science 100,
https://doi.org/10.1007/978-3-030-68303-0_3
31
Study on Improving the Performance
of Nitinol Cardiovascular Stent by “Fiber
Laser—Electropolishing”
Xiaoyu Sun, Xiuting Wei, Zhiyong Li, Deda Lou, Yongqi Wang,
and Hanqing Liu
Abstract High performance cardiovascular stent plays an important role in solving
cardiovascular disease. In order to improve the surface integrity and biocompatibility of cardiovascular stents, the collaborative manufacturing process of “fiber
laser-electropolishing” was studied. Through experiments and comparative analysis,
the surface integrity and biocompatibility of cardiovascular stent by collaborative
process were better than that of single laser cutting. The surface of the cardiovascular stent was bright and smooth, without dross and heat damage. The surface roughness of the cardiovascular stent reached tens of nanometers, and a layer of titanium
dioxide protective film was generated on the surface. So the process could improve
the surface integrity and biocompatibility of cardiovascular stent. In addition, the
process used alcohol-salt non-toxic electrolyte for electropolishing, which improved
the environmental friendliness of the process. Finally, this process can produce highquality cardiovascular stent, which is of great significance to the cardiovascular stent
manufacturing industry and has bright application prospects.
Keywords Nitinol cardiovascular stents · “Fiber laser-electropolishing”
collaborative manufacturing · Surface integrity · Process technology · Non-toxic
electrolyte
3.1 Introduction
The incidence rate of cardiovascular diseases is high and the increasing trend is
accelerating [1–3]. Most patients with cardiovascular disease need to be implanted
with cardiovascular stents. Therefore, cardiovascular stents have great social needs.
However, the manufacturing process of cardiovascular stent determines its surface
X. Sun · X. Wei (B) · Z. Li · Y. Wang · H. Liu
School of Mechanical Engineering, Shandong University of Technology, Zibo 255049, China
e-mail: wxt@sdut.edu.cn
D. Lou
Weihai Visee Medical Device Co., Ltd., Weihai 264200, China
© The Author(s), under exclusive license to Springer Nature Switzerland AG 2021
J. Xu and K. M. Pandey (eds.), Mechanical Engineering and Materials,
Mechanisms and Machine Science 100,
https://doi.org/10.1007/978-3-030-68303-0_3
31