欢迎来到天天文库
浏览记录
ID:33106740
大小:9.26 MB
页数:69页
时间:2019-02-20
《铜2f铝钎焊用锌基钎料的研制与其炉中钎焊工艺分析》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
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
此文档下载收益归作者所有