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1、LY12铝/AZ31镁异种合金储能焊研究XX（XX理工材料科学少工程学院材控XX班，XXXX1234567）指导老师：XXX［摘要］:应用微型储能焊机对LY12铝合金AZ31镁合金细直径板材材进行了快速凝固焊接，观察了接头纽织，测试了接头性能，分析了接头组织形成机理以及焊接工艺参数对焊接质量的影响。结果表明：应用储能电容瞬间放电所产生的高能量可以实现LY12铝合金AZ31镁合金板材的焊接，获得了对接接头。接头由形状规则的扁球状熔核和熔核与母材接壤的熔合区纽成。熔核和半熔化区均形成了均匀细小致密的快速凝固组织。由于在快速凝固焊接过程中熔融态金属发生了剧烈地液相流动，
2、熔核组织呈现出蜗状流线形貌。熔合区宽度约3_5mm,与熔合区毗邻的母材组织未出现粗化迹象。在焊接能量及焊接时间一定的条件下，电极力和焊接电压对接头力学性能具有显著影响，其中焊接电压的影响要更显著一些。基于电网电压存在波动及充电电容放电的不稳定性，焊接能量波动较大，焊接质量的稳定性有待于进一步提高。［关键词］:LY12,AZ31,快速凝固焊接，接头组织及性能，储能焊Mg-AlalloysdischargeweldingdissimilaralloysXXX(GradeO6,Class4,Majorcontrolmaterials,MaterialInstitute,
3、XXUniversityofTechnology,XX1234567,Shaanxi)Tutor:XX[Abstract]:TliesmallpalteofLY12andAZ31wereweldedbyusingamicroCDWmachine.Tliemicrostructureofweldingjointwasobservedandthemechanicalpropertiesofthejointweretested.Themicrostructureformationmechanismofjointwasanalyzed,andtheinfluenceofw
4、eldingparametersonjoinqualitywasresearched・TlieresultsindicatethattheweldingofLY12andAZ31withsmallplatecanberealizedbycapacitordischargeweldingandbuttingjointwasobtained,whichcomposetheshapeoftherulesofjointmeltnuclearandshallowsphericalnuclearfusionwithrespecttotheborderarea・Moltenco
5、reandhalfwereformedauniformmeltareawithsmallcompactrapidsolid讦icationmicrostructure・Undertheelectrodepressureandelectromagneticforceinprogressofrapidsolidificationwelding,theliquidphaseflowoccursinundercoolednugget»whichissymmetricalabouttheelectrodeaxisandconnectioninterfaceandresult
6、sintheformationofcurvingstreamline..Thethicknessofsemi-meltzonewasonly3-5pm,andtherewasnoobviousehangeofmierostruetureinheat-affectedzone・Inthecertainweldingenergyandweldingtimeconditions,weldingvoltageandeleclrodepressurehavesignificantinfluenceonjointmechanicalproperty,whichtheelect
7、ricvoltagehasmoresignificantimpact.Basedontheexistingbatteiyvoltagefluctuationandtheinstability,theweldingenergywaveislarger,thestabilityofweldingqualityneedsfurtherimprovement.[Keywords]:AZ31,LY12irapidsolidificationwelding,microstructureandmechanicalpropertyofjoint,dischargewe目录1前言1
8、1.1研究
