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简介：TheprocesspropertiesandinterfacebehaviorofCO2laserbrazingwithautomaticwirefeedforgalvanizedsteelsheetswereinvestigated,inwhichthebrazingfillermetalwasCuSi3andnofluxwasused.Astotheappearancequalityofthebrazingseams,therolesoftheprocessingparameters,suchasbrazingspeed,wirefeedingrate,inclinationandfeedingdirectionofthewire,laserpower,spotdiameterandheatingposition,wereassessed.ThefurtherinvestigationindicatesthatthebehavioroftheactiveelementsSi,MnandZnaresignificantlyinfluencedbyenergyinput.Attheinterface,themicrostructureofthebasemetalwascomposedofcolumnarcrystalsandtheacicalarαsolidsolutionwasfoundonthefillermetalside.

简介：55%SiCp/A356(体积部分)以铜锌金焊接在把Zn-Al合金用作filler金属的空中的composites被调查。在以铜锌金焊接的过程期间，超声的颤动为结合被用于样品，进在基础材料的矩阵合金的filler金属的重要溶解发生了。当以铜锌金焊接的温度被增加，在基础材料的部分融化层的厚度增加了。原文如此，在基础材料的部分融化层的粒子在超声的行动下面被变成液体filler，有同类地分布式的加强的一张契约在团结以后被获得。体积部分原文如此，在契约的粒子能被改变以铜锌金焊接的温度改变。最大值原文如此，契约材料的粒子体积部分在500的以铜锌金焊接的温度到达了37%?????????????敷摬摥？？

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简介：Accordingtothespecificationofsuperalloy-stainlesssteelarcbrazingandcharacteristicofthebasemetal,abestfillermetalwhichhasrelativelowermeltingpoint,nicewettability,goodweldforming,andadequateshearstrengthwasresearched.TheexperimentresultsshowthatwettabilityofCuFeMnonthestainlesssteelisverypoor,concomitantwithamassofpurplesootduringtheweldingwhichdeterioratestheworkingcondition.CuSiMnhasthebestwettabilityonboththesuperalloyandstainlesssteel,butthereremainsalotofpitandslagonthesurfaceoftheweldbead.Copper-basedsolderhasthehighestmeltingpointanditswettabilityandclearancefillabilityareweakerthanCuSi3.WettabilityandclearancefillabilityoftheCuSi3arethebestinallthecandidatefillermetals,anditsweldissmoothnessandhashighershearstrength.Foritscomprehensiveability,CuSi3isselectedasthefinalfillermetal.

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简介：Theelectronbeamwelding-brazingbeingusedtojoin5A06AlalloytoTC4Tialloydecreasestheformationofbrittleintermetalliccompound.Experimentswerecarriedouttostudytheinfluenceofelectronbeamweldingparametersonthetensilestrengthofwelds,basedonanorthogonaltestandanalysismethod.Theweldingparametersincludebeamcurrent,weldingspeed,scanningfigure,scanningfrequency,figuresize,beamoffsetandfocuscurrent.Theoptimumparametersfor3mm5A06Alalloyand2mmTC4alloywereasfollows:accelerationvoltagewas60kV,beamcurrentwas11mA,weldingspeedwas600mm/min,focuscurrentwas0mA,scanfigurewasO,scanningfrequencywas1000Hzandbeamoffsetwas0.5mm.Theresultsshowthatthejointswerewithgoodappearanceandqualityweldedbytheoptimumparameters.ThesuccessfuljointscouldbegainedandthemaximumtensilestrengthofAl/Tidissimilaralloyjointscouldbeupto222.61MPausingelectronbeamwelding-brazing.

简介：摘要：CMT Braze+焊接工艺因其快速的焊接速度,较低的热量输入,良好的外观质量及其相对于激光钎焊有较大的成本优势,在汽车行业内高端车型被逐渐开始使用,但其由于本身焊接工艺存在特殊性，尤其是轻量化汽车的发展趋势越来越强劲，通过特殊的热处理的高强钢，甚至双相钢，都适合该种工艺。同时为了保证焊接质量，将焊缝自动跟踪系统和钎焊集成应用，该采用激光三角测量原理，对焊缝路径上的特征点进行设置和提取，实时引导焊接机器人进行焊接，保证焊接质量和精度。本文主要结合现场应用，详细阐述了CMT BRAZING+ 钎焊系统在汽车生产线中的应用。

简介：沿着在中等温度的以铜锌金焊接下面的典型的铝合金的深度方向的表面氧化物电影的进化借助于X光检查光电子光谱学(XPS)被调查。为有在2.0wt%下面的Mg内容的合金，是否在冷滚动状况下面或在中等温度的以铜锌金焊接期间处理，表面上的Mg元素的丰富没被检测，氧化物电影是纯Al2O3。然而，氧化物电影在中等温度的以铜锌金焊接的过程期间显然成长了，并且厚度是大约80nm。为有在2.0wt%上面的Mg内容的合金，在冷滚动状况下面，原来的表面氧化物电影是纯Al2O3。然而，Mg元素显著地在中等温度的以铜锌金焊接期间在最外面的表面上被充实过程，和与MgAl2O4的小数量混合的基于MgO的氧化物电影与大约130nm的厚度被形成。Mn和Si的alloying元素没既不在冷滚动状况下面也不在以铜锌金焊接的mediumtemperature期间在表面上被充实为所有选择的铝合金的过程，和表面氧化物电影几乎类似于纯铝的，它是全部Al2O3。

简介：Ti-basedfillermetalsmadebytransientsolidificationandnormalcrystallizationwereselectedforthevacuumbrazingoftheTiAlalloyand42CrMounderdifferentprocessingparameters.Theresultsshowthatthetensilestrengthofthejointoftransientsolidifiedfillermetalishigherthanthatofnormalcrystallizedfillermetalunderthesameprocessingparameters.Bytheanalysisofscanningelectronmicroscope(SEM)andX-raydiffracting(XRD),itisfoundthatthehigherstrengthmaybecausedbythegeneratingofTiAl,TiNiandTiCuattheinterfaceofjointmadebytransientsolidifiedfillermetal.

简介：Somepartswithcapillarytoplatejointhaveimportantapplicationinaerocraft.Vacuumelectronbeambrazing(VEBB)technologyisusedtorealizethisjointingwithcapillaries.Firstly3Dfiniteelementanalysismodelisbuiltinthispaperaccordingtothisspecialstructure.AndthenANSYSfiniteelementanalysissoftwareisusedtoanalyzebrazingtemperaturefieldatdifferentbrazingparameters.Thecalculationresultsshowthatthetemperaturefieldofsimulationhasgoodagreementwiththatmeasuredbyexperiment,whichprovesdependenceofthemodelbuiltinthispaper.Andalsoreferenceparameterscouldbeprovidedforrealbrazingprocessthroughcalculationinthismodel.BrazedjointofcapillarytoplatewithgoodperformanceisachievedusingVEBBtechnology.Theachievementofthestudywillbeappliedinaerocraftinthefuture.

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简介：ThevacuuminductionbrazingofSiCparticulatereinforcedLY12alloymatrixcompositeusingAl-28Cu-5Si-2Mgfillermetalhasbeencarriedout.Themicrographofthejointinterfacewasobservedbyscanningelectronmicroscopy.Thejointstrengthwasdeterminedbysheartests.Theresultsshowthatbrazingtemperature,holdingtime,SiCparticlevolumepercentageandpostheattreatmentinfluencejointstrength.SiCparticleshappeninthebrazingseamandthedistributionofSiCparticlesinthejointisnotuniform.Particle-poorzonesinthejointexistnearthebasemetal,andparticleconcentratezonesexistinthecenterofthebrazingseam.Inaddition,thefailureofthecompositeispredominantlyinitiatedbytherootingofSiCparticleinthebrazingseamandthemicro-crackexpandedalongthebrazingseamwithlowenergy.

简介：用Ag-Cu-Zn-Snfiller金属黄铜以铜锌金焊接到钢的正式就职在这研究被调查。微观结构和性质上的Ag内容的影响借助于光显微镜学被分析，扫描电子显微镜学和电子探查微量分析。缺点免费关节用Ag-Cu-Zn-Snfiller被完成金属。关节的微观结构主要由基于Ag的稳固的答案和基于Cu的稳固的答案组成。Ag内容和冷却的率的增加两个都导致了象最容易溶解的结构一样的针的增加。张力的力量随Ag内容的增加减少了。在用Ag25CuZnSnfiller金属的房间温度的张力的力量到达了445MPa。用Ag-Cu-Zn-Snfiller金属的所有破裂介绍了可锻的特征。

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