【摘要】 介绍了激光精细雕刻冠脉支架的工艺流程,包括结构设计、激光精密切割、高真空热处理等;对冠脉支架的结构设计原则进行了讨论,并基于此原则设计了新型的冠脉支架结构。分析了激光切割316L不锈钢切口质量的影响因素及高真空热处理对冠脉支架性能的影响。确定激光精细雕刻的加工参数为:波长1064 nm,光斑直径2~3 mm,脉宽12~300μs,脉冲频率0.1~5000 Hz,平均功率15 W,脉冲能量2~180 mJ。真空热处理工艺为:动态真空度3~5 kPa,氩气保护,流速10 mL/min,热处理温度1020~1040℃,保温时间1~2 min,随炉冷却。冠脉支架实物样品撑开试验表明,此新型冠脉支架结构是可行的,但还需进一步优化。更多还原

【Abstract】 The process flow of laser sculpturing coronary stent was introduced including the design philosophy of coronary stent,laser fine cutting and high vacuum heat treating etc,the principles of coronary structure was discussed and a new type stent was completed based on it.The notch quality influence factors of laser cutting 316L stainless steel and coronary stent performances after high vaccum heat treating were analyzed.The laser cutting parameters were determined as wavelength 1064 nm,spot diameter 2~3 mm,pulse width 12~300 μs,pulse frequency 0.1~5000 Hz,average power 15 W,pulse energy 2~180 mJ,and the high vacuum heat treating processing parameters were defined as dynamic vacuum 3~5 kPa,argon shield,velocity of flow 10 mL/min,the heat treatment process is heating to 1020~1040 ℃,holding time 1~2 min,furnace cooling.Coronary stent supporting assay validates the feasibility of coronary structure,but it needs further optimization.更多还原