铜2f铝钎焊用锌基钎料的研制与其炉中钎焊工艺分析

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1、万方数据万方数据万方数据西安理工大学硕士学位论文元化合物层、Zn-Cu二元化合物层和Cu-Al二元化合物层，其中Cu-Al化合物层最薄且不连续，界面显微硬度明显低于对接接头，仅为381HV。关键词：锌基钎料；炉中钎焊；熔化温度；铺展性能；力学性能；显微组织II万方数据万方数据西安理工大学硕士学位论文obtainedinZn-richregionthanAl-richregion.AcontinuousthinCu-Alintermetalliccompound(IMC)layerwithVickersmicro-h

2、ardnessashighas557HVformedattheweld/copperinterface,wherecrackwaseasytooccurandspread.Theaveragetensilestrengthofthealuminum/copperbrazedbuttjointis50.62MPa.3.Themainconclusionsofthefurnacebrazingexperimentinvacuumfurnacewerepresentedasfollows.AcontinuousthinC

3、u-AlIMClayerformedattheweld/copperinterfaceinbuttjoint,andthehighestVickersmicro-hardnessliedinthisarea.IMClayerwaseasytoappearandspreadcrack,resultinginfracturedonthesolderingseamforallthebuttjoints.Fractureofbuttjointspresentedtobecleavagebrittlefractureands

4、mallscaledeformation,gravitysegregationphenomenonwasnotobserved.Thetensilestrengthofbuttjointswas53.4MPainvacuum,whichwashigherthanthatinprotectiveatmosphere.AcomplexIMClayersconsistedofZn-Al-Cu、Zn-CuandCu-AlformedbetweentheCusideandweldseam，buttheCu-AlIMCwass

5、limmestandnotcontinuous.Inthiscase,fractureoccurredontheAlbasemetal,meaningabetterbondingstrength.Comparedtobuttjoint,lapjointshadthelowerVickersmicro-hardness(381HV).Keywords:Zinc-basefillermetal;Furnacesoldering;Microstructure;Spreadability;Mechanicalpropert

6、ies;IV万方数据目录目录摘要......................................................................................................错误!未定义书签。Abstract................................................................................................错误!未定义书签。1绪论.................

7、..................................................................................................................11.1铝铜连接的应用与困难........................................................................................11.2铜铝材料连接方式................................

8、................................................................21.2.1机械连接现状..............................................................................................21.2.2熔化焊连