摘要
采用不同的光纤激光切割工艺参数(功率、频率、脉宽、切割速度、氧气压力、喷嘴距离)对?1.8 mm(壁厚0.1 mm)的L605管材进行了切割。将切割试样酸洗处理后,用3D共聚焦显微镜测量切缝宽度和切面粗糙度,用扫描电镜(SEM)观察切面的微观形貌。结果表明:激光功率增大,切缝宽度增大,切面粗糙度先减小后增大;激光频率、脉宽增大,切缝宽度和切面粗糙度都增大;切割速度增大,切缝宽度减小,切面粗糙度增大;氧气压力提高,切缝宽度增大,切面粗糙度降低;喷嘴距离为0.25 mm时,切缝宽度和切面粗糙度均最小。激光功率、频率、脉宽、切割速度、氧气压力、喷嘴距离改变使切面上的切割条纹发生改变以及出现残渣、金属屑、重铸层等。
Different fiber laser cutting parameters(power,frequency,pulse width,cutting speed,oxygen pressure and nozzle distance)were used to cut L605 tube with diameter of 1.8 mm(wall thickness 0.1 mm).After pickling,the width and roughness of the kerf surface were measured by 3D confocal microscope,and the micro-morphology of the kerf surface was observed by scanning electron microscopy(SEM).The results show that with the increase of laser power,the width of the kerf increases,and the kerf surface roughness decreases first and then increases.With the increase of the laser frequency and pulse width,the kerf width and surface roughness increase.With the increase of cutting speed,the kerf width decreases and the surface roughness increases.With the increase of oxygen pressure,the width of the kerf increases and the surface roughness decreases.When the nozzle distance is 0.25 mm,the width of the kerf and the surface roughness are minimized.The change of laser power,frequency,pulse width,cutting speed,oxygen pressure and nozzle distance will result in the change of cutting striations on the kerf surface and the appearance of slag,metal chips,re-casting layer,etc.
作者
杨杰
李鹏辉
陈泽中
刘永峰
YANG Jie;LI Peng-hui;CHEN Ze-zhong;LIU Yong-feng(School of Materials Science and Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Shanghai Microport Medical(Group)Co Ltd,Shanghai201203,China)
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2019年第8期84-90,共7页
Transactions of Materials and Heat Treatment
