摘要
实验选用波长1090nm、峰值功率50W的光纤激光器,切割直径2mm、厚0.13mm的316L不锈钢管材以获得理想的心血管支架.实验结果表明:激光切割质量主要与激光聚焦、激光切割频率、激光切割速率和脉冲宽度等因素有关.在激光切割频率2000 Hz、激光平均功率50W、脉宽0.06～0.2ms、典型值0.1ms、切割速率100mm/min、焦距50mm、氧压(同轴)0.6～1MPa的条件下,获得了切口表面光滑、切缝垂直度好、筋宽为(100±10)μm的血管支架.其延伸率δ≥40%,抗拉强度σ≥480 MPa,综合性能能够满足使用要求.
In order to acquire an ideal stent, a fiber laser with a wavelength of 1090 nm and peak power of 50 W was applied to cut 316 L stainless steel pipes with a diameter of 2 mm and thickness of 0. 13 mm. The results show that the laser cutting quality is mainly related with the factors including laser-beam focus, laser cutting frequency, laser cutting speed and laser pulse width. Under the conditions of laser cutting frequency of 2000 Hz, laser average power of 50 W, pulse width of 0.06-0.2 ms （typical 0.1 ms）, cutting speed of 100 mm/min, focal length 50 mm and oxygen pressure （coaxial） of 0.6-1 MPa, a stent with a more smooth cut surface, good cut seam vertical degree and tendon width of （100±10） μm was obtained, and its elongation δ is higher than 40%, tensile strength σ is higher than 480 MPa, total properties can meet application requirements.
出处
《材料研究与应用》
CAS
2009年第4期276-280,共5页
Materials Research and Application
关键词
激光精密切割
不锈钢支架
光纤激光
高线密度
laser precision cutting
stainless steel stent
fiber laser
high linear density
