Effect of laser parameters on slit morphology and roughness of vascular stents

ZHAO Shiwei; ZHANG Haiyun; LI Zhiyong; ZHAO Yugang; ZHANG Jinye

doi:10.7510/jgjs.issn.1001-3806.2020.03.005

LASER TECHNOLOGY > 2020 > 44(3): 299-303. > DOI: 10.7510/jgjs.issn.1001-3806.2020.03.005

ZHAO Shiwei, ZHANG Haiyun, LI Zhiyong, ZHAO Yugang, ZHANG Jinye. Effect of laser parameters on slit morphology and roughness of vascular stents[J]. LASER TECHNOLOGY, 2020, 44(3): 299-303. DOI: 10.7510/jgjs.issn.1001-3806.2020.03.005

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Effect of laser parameters on slit morphology and roughness of vascular stents

School of Mechanical Engineering, Shandong University of Technology, Zibo 255049, China

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Received Date: August 15, 2019
Revised Date: September 17, 2019
Published Date: May 24, 2020

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Abstract

Abstract

In order to study the effect of laser processing parameters on the slit morphology and surface roughness of vascular stent, the experiment of optical fiber laser cutting of cardiovascular stent 316L was carried out by means of comparative analysis of different parameters. The effects of different process parameters such as laser pulse width, laser power, and cutting speed on the slit morphology and roughness of the material were analyzed, and the optimum combination of process parameters for laser cutting support was obtained. The results show that there are differences in slit morphology and surface roughness in different regions, in which the thickness of the vaporization zone is mainly affected by the pulse width and laser power. When the pulse width is 35μs, the maximum thickness of the slit vaporization zone can reach 120μm. In addition, the roughness of the slit vaporization zone of the support decreases at first and then increases with the increase of the cutting speed. When the cutting speed is 6mm/s, the lowest value of slit surface roughness is 650nm. The results lay a theoretical foundation for the research and subsequent finishing of cardiovascular stent optical fiber.
- laser technique,
- cardiovascular stent,
- process parameters,
- slit morphology,
- roughness

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