激光技术2017，Vol.41Issue(3)：427-432,6.DOI:10.7510/jgjs.issn.1001-3806.2017.03.024
不同脉宽纳秒激光致铝材损伤特性与打孔机理
Damage threshold and drilling mechanism of aluminum plate by nanosecond laser with different pulse widths
摘要
Abstract
In order to get the damage features of nanosecond laser pulse width to aluminium and provided the basis for choosing proper pulse width in the processing of metals by nanosecond laser,by using the area calculation method and instruments(optical microscope,scanning electron microscope and surface profiler),the damage thresholds of 37 kinds of nanosecond laser(pulse width of 10ns～520ns,wavelength of 1064nm)on aluminium were obtained.The effects of laser pulse number on damage thresholds of aluminium were analyzed with constant pulse width.The function mechanism of nanosecond laser pulse width on the quality of drilling holes in aluminium was also revealed.The results show that the damage threshold of single pulse is linearly related to the square root of laser pulse width of nanosecond laser.The damage threshold of aluminium decreases with the increase of the number of pulse width.The narrower the pulse width of nanosecond laser is,the higher the damage threshold to aluminium is.Evaporation process occupies the leading position during the drilling process.Furthermore,the less the melted thing on the inner wall of hole is,the better the circular degree of hole will be.The less the spraying materials in the orifice is,the higher the quality of drilling will be.The results provide the guide for choosing proper pulse width in the processing of metals with nanosecond laser.关键词
激光技术/损伤阈值/脉宽/铝板/机理Key words
laser technique/damage threshold/pulse width/aluminum plate/mechanism分类
矿业与冶金引用本文复制引用
娄德元,熊厚,伍义刚,翟中生,陈列,戚得众,杨奇彪,刘顿..不同脉宽纳秒激光致铝材损伤特性与打孔机理[J].激光技术,2017,41(3):427-432,6.基金项目
湖北省教育厅科技研究计划资助项目(B2016051 （）
Q20151408) （）
国家科技支撑计划资助项目(2015BAF20B03) （2015BAF20B03）
湖北省高等学校优秀中青年科技创新团队计划资助项目(610112052) （610112052）
东北大学轧制技术与连轧自动化国家重点实验室开放课题基金资助项目(2016001) （2016001）
