Real-Time Monitoring of Coaxial Protection Fiber Laser Welding of Austenitic Stainless Steels - Details

Author：

Ren, Yong (Ren, Yong.) | Wu, Qiang (Wu, Qiang.) | Zou, Jianglin (Zou, Jianglin.) | Chen, Le (Chen, Le.) | Xiao, Rongshi (Xiao, Rongshi.) (Scholars：肖荣诗)

Indexed by：

EI Scopus PKU CSCD

Abstract：

The　austenitic　stainless　steel　is　welded　with　the　fiber　laser　and　coaxial　protection　method.　The　optical　signals　during　the　welding　process　are　collected　by　the　laser　welding　and　synchronously　monitoring　system,　which　is　combined　with　the　shape　of　plume　to　study　the　influence　laws　of　different　welding　conditions　on　the　weld　formation　and　optical　signal　intensity.　The　results　show　that　the　optical　signal　intensity　gradually　increases　with　the　increase　of　laser　power.　When　the　defocusing　amount　changes　from　-6　mm　to　6　mm,　the　optical　signal　intensity　decreases　first　and　then　increases.　The　optical　signal　change　can　reflect　the　change　of　weld　penetration,　which　can　be　used　to　detect　the　weld　defects　caused　by　the　change　of　the　lap　gap　and　the　weld　position.　The　exact　location　of　the　area　with　the　abnormal　welding　quality　can　be　judged　by　analyzing　P　signal　data.　The　optical　signal　intensity　is　positively　related　to　the　plume　volume　during　the　welding　process.　©　2017,　Chinese　Lasers　Press.　All　right　reserved.

Keyword：

Fiber lasers Welds Austenitic stainless steel Steel fibers Welding

Author Community：

[ 1 ] [Ren, Yong]High-Power and Ultrafast Laser Manufacturing Laboratory, Institute of Laser Engineering, Beijing University of Technology, Beijing; 100124, China
[ 2 ] [Wu, Qiang]High-Power and Ultrafast Laser Manufacturing Laboratory, Institute of Laser Engineering, Beijing University of Technology, Beijing; 100124, China
[ 3 ] [Zou, Jianglin]High-Power and Ultrafast Laser Manufacturing Laboratory, Institute of Laser Engineering, Beijing University of Technology, Beijing; 100124, China
[ 4 ] [Chen, Le]High-Power and Ultrafast Laser Manufacturing Laboratory, Institute of Laser Engineering, Beijing University of Technology, Beijing; 100124, China
[ 5 ] [Xiao, Rongshi]High-Power and Ultrafast Laser Manufacturing Laboratory, Institute of Laser Engineering, Beijing University of Technology, Beijing; 100124, China

Reprint Author's Address：

[wu, qiang]high-power and ultrafast laser manufacturing laboratory, institute of laser engineering, beijing university of technology, beijing; 100124, china

Email：

jlwuqiang@bjut.edu.cn

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