c级钢药芯焊丝的研制

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1、裁哀交通大学颧士学穰论文y8783王2摘要针对铁路货车的车钩和上心盘等e级钢话l件在捡修漪只靛手工焊接，无法实现枧梭化爨动焊接躲润题，提出了采用“翁芯焊丝+气体保护”成“药芯焊丝十焊剂保护”的方法焊补上述配件。礤铡了e级钢专雳黪蕊芯爆丝，遵过对e级钢的化学戏分穗极城谯能进行分析，确定了c级钢药芯焊篓的设计醋栎和设计原剜，在茈基戳上爨裁初步黔配方设计。绞多次对既方进行调整鄹反复的配制试验之后，确定了该渣系药芯焊丝的配方成分配比，并进行了熔敷金属稻浮按接头的纯学成分分奉厅及力学牲靛试验。缀掇试验缱柴可甄，该e缎钢药芯弹

2、照的熔敷金属和霹滚接头的各项机械性能指标均达到了母耪豹爱袋。爆质遴行磁羚探伤霹X射线攥伤以及鑫属盟微组织分秽亍，焊缝表面及内部质量良好，因此焊缝不易产生裂纹和传播裂纹，是较璎想懿簿缝金糕缀织。经小拯量生产验证，矮有良好的辉接工艺经黪、龟弧稳定、脱渣察爨等优点，在C级钢生产中应髑戆最广阉。美键词：0级铜药芯焊丝弹臻注j!室銮望盔兰堡主堂鱼堡苎AbstractAccordingtosolvetheproblemofrailwaytrain’sCleVelsteelaccessory，asthecouplingandth

3、euppercenter—plateetcwhenoverhaulingcan。nlyhandworkwelding，cannotrealizemechanizationautomaticwelding，inthispapertheauthorhasputforwardtousethemethodof“flux—coredwire+gasprotection’’or“flux—coredwire+solderingfluxprotection”toweldmendabove—mentionedaccessoryAn

4、ewtypeofspecialpurposeflux—coredwirefortheCleVelsteelisdeveloped．ThroughanalysingtothechemicalcompositionandthemechanicalperformanceofC1evelsteelhavedeterminedthedesigngoalanddesignprincipleofC1evelsteelflux—coredwire，finishpreliminaryprescriptiondesignonthisf

5、oundation．Afteradjustingforprescriptionmanytimesandthetechnologypropertiestestsrepeatedly，hasdeterminedthisslagsystemprescriptionDfflux—coredwire．Sidebysidethechemicalcompositionofdepositedmetalisanalysedandthemechanicscapabilitytrial，thedepositedmetaltensile．

6、II．北京交通大学硕士学位论文experiment，lowtemperaturetoughnessexperimentandweldingj。intmechanicalperformanceexperi玎)entshowitsmechaniealperfor擂aneeandhardnessasaresultcanreaehorexeeedeleVelsteel．Afterwelding，earryoutthe碡agnetieparti￡le娃n蠢X—rayflawdetectjonaswellasmetalmicr

7、ostructureanalysis，weldmetallographicorganizationisverysmallcrystalandsmallaeicularferrite十peariite(F+P)，thereforewelddon’tbeeasyproduoecr8ckandspreadcrack，is限oreideal带eldmetallographieorganizationBytheproductionverificationofsmallbatch，theC1evelsteeiflux—core

8、dwireprovidesgoodusabi{ity，electriearetostabilizeandtakeoffdregseasyete。thatitisvasttoapplythefOregroundinClevelsteelproduction．Xeywords：C王eve王steel，flnx—eoredwi壬Te，辫eld8bilities．1