Weldability of Metals and Alloys金屬焊接性知到智慧樹章節(jié)測試課后答案2024年秋太原理工大學(xué)

WeldabilityofMetalsandAlloys金屬焊接性知到智慧樹章節(jié)測試課后答案2024年秋太原理工大學(xué)第一章單元測試

Withcarbonequivalent(),thesteelhasalowtendencytohardenandcoldcracking?

A:lessthan0.60%B:lessthan0.40%C:lessthan0.80%D:lessthan0.50%

答案:lessthan0.40%()isnotafactorthataffectsweldability.

A:operationskillB:chemicalcompositionC:WeldingprocessD:jointtype

答案:operationskillThecalculationformulaofcarbonequivalentoftheIWSconsiderstheinfluenceof()onweldability.

A:chemicalcompositionB:diffusionhydrogenC:weldingprocessD:weldingstructure

答案:diffusionhydrogen；weldingprocess；weldingstructure

Maximumcrackdistancehasbeenusedtoallowmoreaccuratedeterminationofthecracking()range.

A:strengthB:temperatureC:toughnessD:size

答案:temperatureWeldabilityisnoteasilyquantified,andcandependonavarietyoffactors,including

().

A:weldingmethodB:operatorandwelderC:physicalspecificsofthejointD:weldedstructure

答案:weldingmethod；physicalspecificsofthejoint；weldedstructure

第二章單元測試

Theweldabilityofhigh-carbonsteelisworsethanthatoflow-carbonsteelbecausehigh-carbonsteeliswith().

A:highersulphurcontentB:highertoughnessC:lowermeltingpointD:highercarboncontent

答案:highercarboncontentNormally,becauseofauto-tempering,thepostweldmicrostructureofQTLAsteelis().

A:ledeburiteB:upperbainiteC:temperedmartensiteD:highcarbonmartensite

答案:temperedmartensiteQTLAsteelisnotsusceptibletosolidificationcrackingbecauseitiswith().

A:lowimpuritycontentB:lowmanganesecontentC:lownickelcontentD:lowcarboncontent

答案:lowimpuritycontent；lowcarboncontentForHTLAsteels,chromiumisableto().

A:increasehardenessofHTLAsteelsB:decreasehardenessofHTLAsteelsC:decreasetoughnessofHTLAsteelsD:increasetoughnessofHTLAsteels

答案:increasehardenessofHTLAsteels；decreasetoughnessofHTLAsteelsWhenyouweldHTLAsteels,you'dbettertotakeadvantageofauto-tempering.

A:錯B:對

答案:錯Auto-temperingoccursafterweldingwhen().

A:coolingrateisslowB:MsishighC:carboncontentofweldislowD:peaktemperatureishigh

答案:coolingrateisslow；carboncontentofweldislowBeforedesigningweldingprocedure,we'dbettertoanalyzetheweldabilityoftheworkpiece.

A:對B:錯

答案:對Toremedytheunderbeadcracking,weneedtoreducecoolingratewhenweweldoilengineconnectingrod.

A:錯B:對

答案:對Ifthecarboncontentofatypeofsteelis0.1%,thissteelisakindof().

A:low-carbonsteelB:high-carbonsteelC:HTLAsteelD:medium-carbonsteel

答案:low-carbonsteel

第三章單元測試

Weldmetalofausteniticstainlesssteelsissusceptibletowelddecay.

A:對B:錯

答案:錯PWHTwouldbehelpfultopreventtheformationofwelddecayinausteniticstainlesssteels.

A:對B:錯

答案:對Adjustingweldingsequencemightbehelpfultopreventtheformationofknife-lineattackinausteniticstainlesssteels.

A:對B:錯

答案:對Nopreheatingisrecommendedduringwieldingofduplexdueto

coarsegrain.

A:錯B:對

答案:錯ThefuncitonofMoissimilartothatofChromiumthattendstostabilizealfa-Fe(bcc)anditshigh-temperaturecounterpartdelta-Fe(bcc).

A:對B:錯

答案:對

第四章單元測試

TheminimumhardnessinthejointofaFSWedprecipitation-hardenedaluminumalloysliesinthe().

A:thermallyaffectedzoneB:dynamicallyrecrystallizedzoneC:thermomechanicallyaffectedzone

答案:thermomechanicallyaffectedzoneThemainalloyingelementisfor7xxxalloys().

A:SiB:CuC:MnD:MgE:Zn

答案:ZnLiquationcrackingandhydrogen-inducedcrackinginthePMZofaluminiumalloysarebothcausedbythecombinationofasusceptiblemicrostructureandthepresenceoftensilestresses.

A:錯B:對

答案:對Freonhasbeenaddedtotheshieldinggastoreducehydrogeninaluminiumwelds.

A:錯B:對

答案:對Purealuminumisnotsusceptibletosolidificationcracking.

A:對B:錯

答案:對Liquationcrackingcanbereducedbyselectingtheproperfillermetal.

A:對B:錯

答案:對ThecleaningactionoftheDCENcyclehelpsremovehydratedoxidesandhydrides.

A:對B:錯

答案:錯Adjustingweldingsequenceishelpfultopreventtheformationofwelddecayinausteniticstainlesssteels.

A:錯B:對

答案:錯Afineequiaxeddendriticstructurehasalowersusceptibilitytocrackingthanacoarsecolumnardendriticstructure.

A:對B:錯

答案:對

第五章單元測試

Generally,thecarboncontentofcastironsisgenerallyintherangeof().

A:largerthan2.0%B:largerthan1.0%C:lessthan1.0%D:lessthan3%

答案:largerthan2.0%Castironscanbeconvenientlygroupedaccordingtotheirstructure,mechanicalpropertiesandweldability;theyare().

A:AGreycastironsB:CmalleableironsC:BWhitecastironsD:DSGgraphitecastiron

答案:AGreycastirons；Cmalleableirons；BWhitecastirons；DSGgraphitecastiron()isextremelyhardandbrittle,inwhichmuchofthecarboninisretainedintheformofironcarbidewithoutgraphiteflakes.

A:BWhitecastironsB:DSGgraphitecastironC:AGreycastironsD:Cmalleableirons

答案:BWhitecastironsCastingironswithpearliticmatrixownhigherstrengththanferriticmatrix.

A:錯B:對

答案:對Malleableironsaremorereadilyweldablethangreyirons.

A:錯B:對

答案:對Thebrazingweldneedannealingheattreatmentsothatitiseas