Anexperimentfordeterminingthelaser-TIGhybridweldingcharacteristicswascarriedoutinthreekindsofhybridmethods:CO2laser-TIGcoaxialhybrid,CO2laser-TIGparaxialhybridandNd:YAGlaser-TIGparaxialhybrid.TheexperimentalresultsindicatethathybridweldinghastwoweldingmechanismsinCO2laser-TIGhybridwelding:deeppenetrationweldingandheatconductionwelding.Astheeffectofthelaser-inducedkeyhole,thearcrootiscondensed,thecurrentdensityandpenetrationdepthincreasesignificantly,theweldingcharacteristicisapttodeeppenetrationwelding.Whencurrentincreasestosomedegree,thekeyholeinducedbylaserdisappears,whichproducesashallowpenetrationandwidebead.Theweldexhibitsheatconductionweldingcharacteristics.Furthermore,thearcimagesandweldbeadcross-sectionsofthreekindsofhybridmannerswerealsocomparedandanalyzedatdifferentweldingcurrents,whichestablishedthefoundationforunderstandingtheweldingcharacteristicsoflaser-TIGhybridweldingcomprehensively.
