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1、Q345钢的CO2气体保护焊的工艺研究摘要本文以Q345钢的CO2气体保护焊的工艺为例对其进行了分析与研究。Q345钢综合力学性能良好,低温性能亦可,塑性和焊接性良好,用做中低压力容器、油罐、车辆、起重机、矿山机械、电站、桥梁等承受动载荷的结构。热轧或正火状态使用,可用于-40℃以下寒冷地区的各种结构。二氧化碳气体保护焊目前已发展成为一种重要的熔焊方法,具有成本低、效率高、操作灵活等特点。广泛应用于汽车、工程机械、造船业、机车、电梯、锅炉压力容器等制造业,以及各种金属结构和金属加工机械的生产。本文首先分析了Q345钢的焊接性,其次对C
2、O2气体保护焊特点和工艺的进行了分析,从而确定了Q345钢的CO2气体保护焊焊接工艺。通过工艺参数的优化选择,不仅能减少焊接过程中的常见问题,而且有效减少焊接缺陷的出现,并能提高生产效率,节约生产成本。关键词:Q345钢,CO2气体保护焊,工艺,焊接缺陷TECHNOLOGYOFSTUDYQ345STEELBYCO2GASWELDINGPROTECTIONABSTRACTInthispaper,Q345SteelCO2gasshieldedweldingprocessasanexampleofitsanalysisandresearch
3、.GoodmechanicalpropertiesofQ345steel,lowtemperatureperformancecan,plasticandweldingofgood,usedinlowpressurevessels,tanks,vehicles,cranes,miningmachinery,powerplants,bridgesandotherstructurestowithstanddynamicload,mechanicalparts,buildingstructures,Generalmetalstructure,
4、useofhot-rolledornormalizedcondition,thefollowingcanbeusedin-40℃coldregionsofthevariousstructures.Inordertoimproveefficiency,costsavings,andmoreuseofweldingtechnology.Carbondioxidegasweldingprotectionhasgrowntobecomeanimportantbywelding,withlowcost,efficientandflexibleo
5、peratingcharacteristics.Itiswidelyusedinthecarengine,shipbuilding,constructionmachinery.Theboilerpressurevessel,suchasmanufacturing,andallsortsofmetalandmetalprocessingmachineryproduction.ThispaperanalyzestheQ345steelwelding,followedbyCO2gasshieldedweldingonthecharacter
6、isticsandprocessesareanalyzedtodeterminetheQ345steelCO2gasshieldedweldingprocess.Optimizationofprocessingparameters,notonlycanreducetheweldingprocessoffrequentlyaskedquestions,andeffectivelyreducetheappearanceofwelddefects,andcanimproveproductionefficiency,savingproduct
7、ioncost.KEYWORDS:Q345steel,CO2gasshieldedwelding,technology,defectsofwelding目录摘要………………………………………….………...……………………ⅠABSTRACT……………………………………………………..……………Ⅱ目录......................................................................................................Ⅲ前言……………………………..……
8、…………….…………..…................1第1章Q345钢及CO2气体保护焊简介…………………….................31.1Q345钢简介 ………………………..............