High precision laser cutting with minimal post-treatment is needed in the manufacturing of nitinol cardiovascular stents. This paper carries out a series of cutting experiments of nitinol cardiovascular stents by wet fiber laser cutting to understand the basic process characteristics and to investigate the influences of process parameters (laser power, cutting speed, pulse width, frequency) upon the surface integrity (surface topography, dross, surface roughness, HAZ, recast layer, subsurface nanohardness, surface chemical composition). The univariate analysis was used to analyze and explain the influence that rules of process parameters had upon the surface integrity. The experiment results showed that the effects of process parameters on surface integrity were regular, with the optimal single-factor parameters obtained. Moreover, the removal mechanism of the nitinol material was also revealed. This study is of great significance for the medical industry in improve the cutting quality of cardiovascular stents.

在镍钛诺心血管支架的制造中，需要进行最少的后处理的高精度激光切割。本文通过湿纤维激光切割进行了镍钛诺心血管支架的一系列切割实验，以了解基本的工艺特征并研究工艺参数（激光功率，切割速度，脉冲宽度，频率）对表面完整性（表面）的影响形貌，浮渣，表面粗糙度，热影响区，重铸层，地下纳米硬度，表面化学成分）。单变量分析用于分析和解释工艺参数规则对表面完整性的影响。实验结果表明，工艺参数对表面完整性的影响是规律的，并获得了最佳的单因素参数。而且，还揭示了镍钛诺材料的去除机理。这项研究对提高心血管支架切割质量对医疗行业具有重要意义。