资源描述：
《2011iwe材料部分工艺试题》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。
1、2011最新IWE材料部分工艺试题1.accordingtotheGermanInstituteofElectricalEngineering(VDE),asolderwithsteepdropcharacteristics・・・BA35%,B60%,C75%,D,100%,E,BorC2.,underwhatconditionsshouldthebasicelectrodebesuitableforwelding?BA.requiressmoothsurfaceformationofweldsB
2、hashigherrequirementforwe1dqualityandtoughnessCrequiresgreatwe1dpenetrationDrequiresaparticularlyhighrateofdeposition3.electrodearcweldingistheroleoftraditionalChinesemedicineelectrodeskin:ToimprovetheconductivityofBAarcslagCgasDcorestopreventoxidatio
3、nEpreventsblowhole4..Whichofthefollowingexpressionsforwe1dingterminologycomesfromIS04063?A461,pressurewelding,B131,MIG,activegasshieldedwelding,C131,MIGweldingDGgasshieldedarcweldingECcelluloseelectrode3.themainreasonforundercutinmanualelectrodeweldin
4、gisCDAweldingspeedistooslow,Bweldingcurrentistoostrong,Cweldingarcistoolong,DweldingrodangleiswrongEelectrodecoatingistoothick4.whatkindoffactorsmakerutileelectrodeleadtoarceasily?BAfterAextinctionandrearcing,theendoftheelectrodeissmooth,andtheshellof
5、theBelectrodehasgoodconductivity・TheCcurrentdensityishigher,andtheDcurrentpulseissuperposed7accordingtoIS02560-Astandard,coatingelectrodeE422,MnMo,RF,ACTheminimumyieldstrengthofAis420N/mm2B,andtheminimumimpactvalueis47Jat-20degreesCThemaximumdiffusion
6、hydrogencontentofCper100gramsofweldsis10cm3D,andtheminimumtensilestrengthis420N/mm2Eat20degreesC,theminimumimpactvalueis47J8.whydoestungstensometimescontainmetaloxidessuchastwoandtwo?.BAelectrodecanleadarcBmoreeasilyandimprovetheservicelifeofelectrode
7、Cchangestheelectronemission,DputsthecolorEontheelectrodeandreducesspatterduringwelding9.,TIGwelding,surfaceoxidation,matte,poorliquiditydefectsAargonimpurityBweldmentisnotclean,Cdrystretchlengthistoolong,Dargonflowisnotenough,E・・・・cleanTenEleven(E)Ele
8、ctrodeCcontainingthoriumitsrelativelylongservicelifeofDweldingofferriticsteelelectrodeconnectedtothepositiveThegrindingconeangleofelectrodeusedinEACTIGweldingis45degreesTheadvantageof13pulseweldingisABAheatinputissmall,Bmoltenpooliseasytocontr
