Influence of welding parameters on laser-induced plasma temperature in CO2 laser welding of aluminum alloys - 文章详情页

作者：

Qi, Junfeng (Qi, Junfeng.) | Ding, Peng (Ding, Peng.) | Zhang, Dongyun (Zhang, Dongyun.) (学者：张冬云) | Zuo, Tiechuan (Zuo, Tiechuan.)

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摘要：

The　spectrums　of　laser-induced　plasma　in　CO2　laser　welding　of　6061　aluminum　alloy　are　measured　through　PI　Pro2500i　transient　spectrometer.　Boltzmann　diagrams　can　be　used　to　calculate　the　average　temperature　of　laser-induced　plasma,　which　are　deduced　from　Mg　I　spectrums　between　200-600　nm.　The　influence　of　welding　parameters,　such　as　laser　power,　welding　speed,　focus　position　and　shielding　gas,　on　laser-induced　plasma　temperature　are　investigated　separately　and　the　reasons　are　also　discussed.　Under　the　experimental　conditions,　laser　power　plays　little　role　on　laser-induced　plasma　temperature　(6000　K)　when　it　exceeds　the　threshold　power　of　laser　penetration　welding.　The　effect　rule　of　welding　speeds　on　laser-induced　plasma　temperature　likes　inverted　U　curve.　Laser-induced　plasma　temperature　has　been　increased　and　then　decreased　when　the　flow　rate　of　shielding　gas　is　increased　for　a　given　diameter　of　nozzle.　Laser-induced　plasma　temperature　will　increase　500-1000　K　when　adding　argon　in　to　helium.

关键词：

Aluminum alloys Aluminum metallography Argon lasers Carbon dioxide Carbon dioxide lasers Electron temperature Laser beam welding Laser produced plasmas Magnesium compounds Shielding Welding

作者机构：

[ 1 ] [Qi, Junfeng]Institute of Laser Engineering, Beijing University of Technology, Beijing 100022, China
[ 2 ] [Ding, Peng]Institute of Laser Engineering, Beijing University of Technology, Beijing 100022, China
[ 3 ] [Zhang, Dongyun]Institute of Laser Engineering, Beijing University of Technology, Beijing 100022, China
[ 4 ] [Zuo, Tiechuan]Institute of Laser Engineering, Beijing University of Technology, Beijing 100022, China

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电子邮件地址：

qjfcn@emails.bjut.edu.cn

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