" 摘要：激光作为高能束和洁净热源在焊接中得到了越来越广泛的应用。船舶制造中的激光焊接技术也正得到广泛的研究并开始应用。利用15kW级CO2激光对国产船用板CCS-B、SUS304、A36以及CCS-A进行了对接接头和T形接头的激光焊接研究。在多种板厚条件下获得了良好的激光填丝和激光电弧复合焊接接头。通过宏观和显微金相分析比较CCS-B激光填丝焊和激光电弧复合焊接头焊缝截面形状和组织。通过成分分析，观察了在三种不同高功率激光焊方法(纯激光、激光填丝和激光复合)下焊缝中主要化学成分的含量变化。通过硬度测量、拉伸和弯曲试验测试分析了接头力学性能。 HUANGJian，GAOZhi-guo，CAIYan，WUYi-xiong Abstract：Ashighenergydensitybeamandcleanheatsourcethelaserbeamisappliedinweldingmoreandmore．Thelaserweldingtechnologyinshipbuildingisnowalsoresearchedwidelyandhasfounditsfirstapplications．Intheworkbyusinga15kWCO2laserthelaserweldingtechnologyofChineseshipbuildingsteelsCCS-B，SUS304，A36andCCS-AinformofbuttjointandT-jointwasstudiedinthispaper．Satisfiedlaserwireweldedjointsandlaser?archybridweldedjointswereobtainedatseveralplatethicknesses．TheweldcrosssectionandmicrostructureofCCS-Bsteelplatewereanalyzedbymacroandmicrometallographs．ThroughchemicalcompositionanalysisthecontentchangeofmaincompositionelementsatthreedifferentlaserweldingprocessesincludingpurelaserweldingofCCS-Bsteelwasobserved．Mechanicalpropertiesofweldjointswereanalyzedbyhardnessmeasurement，tensiletestandbendingtest． |
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