Weldability of Metals and Alloys金屬焊接性智慧樹知到課后章節(jié)答案2023年下太原理工大學(xué)

WeldabilityofMetalsandAlloys金屬焊接性智慧樹知到課后章節(jié)答案2023年下太原理工大學(xué)太原理工大學(xué)

第一章測試

Withcarbonequivalent(),thesteelhasalowtendencytohardenandcoldcracking?

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

答案:lessthan0.40%

()isnotafactorthataffectsweldability.

A:chemicalcompositionB:operationskillC:jointtypeD:Weldingprocess

答案:operationskill

ThecalculationformulaofcarbonequivalentoftheIWSconsiderstheinfluenceof()onweldability.

A:diffusionhydrogenB:weldingprocessC:weldingstructure

D:chemicalcomposition

答案:diffusionhydrogen;weldingprocess;weldingstructure

Maximumcrackdistancehasbeenusedtoallowmoreaccuratedeterminationofthecracking()range.

A:temperatureB:strengthC:toughnessD:size

答案:temperature

Weldabilityisnoteasilyquantified,andcandependonavarietyoffactors,including

().

A:weldingmethodB:weldedstructureC:operatorandwelderD:physicalspecificsofthejoint

答案:weldingmethod;weldedstructure;physicalspecificsofthejoint

第二章測試

Theweldabilityofhigh-carbonsteelisworsethanthatoflow-carbonsteelbecausehigh-carbonsteeliswith().

A:lowermeltingpointB:highersulphurcontentC:highertoughnessD:highercarboncontent

答案:highercarboncontent

Normally,becauseofauto-tempering,thepostweldmicrostructureofQTLAsteelis().

A:ledeburiteB:highcarbonmartensiteC:upperbainiteD:temperedmartensite

答案:temperedmartensite

QTLAsteelisnotsusceptibletosolidificationcrackingbecauseitiswith().

A:lowcarboncontentB:lowimpuritycontentC:lownickelcontentD:lowmanganesecontent

答案:lowcarboncontent;lowimpuritycontent

ForHTLAsteels,chromiumisableto().

A:increasetoughnessofHTLAsteelsB:increasehardenessofHTLAsteelsC:decreasehardenessofHTLAsteelsD:decreasetoughnessofHTLAsteels

答案:increasehardenessofHTLAsteels;decreasetoughnessofHTLAsteels

WhenyouweldHTLAsteels,you'dbettertotakeadvantageofauto-tempering.

A:錯B:對

答案:錯

Auto-temperingoccursafterweldingwhen().

A:carboncontentofweldislowB:peaktemperatureishighC:coolingrateisslowD:Msishigh

答案:carboncontentofweldislow;coolingrateisslow

Beforedesigningweldingprocedure,we'dbettertoanalyzetheweldabilityoftheworkpiece.

A:對B:錯

答案:對

Toremedytheunderbeadcracking,weneedtoreducecoolingratewhenweweldoilengineconnectingrod.

A:對B:錯

答案:對

Ifthecarboncontentofatypeofsteelis0.1%,thissteelisakindof().

A:HTLAsteelB:high-carbonsteelC:medium-carbonsteelD:low-carbonsteel

答案:low-carbonsteel

第三章測試

Weldmetalofausteniticstainlesssteelsissusceptibletowelddecay.

A:錯B:對

答案:錯

PWHTwouldbehelpfultopreventtheformationofwelddecayinausteniticstainlesssteels.

A:對B:錯

答案:對

Adjustingweldingsequencemightbehelpfultopreventtheformationofknife-lineattackinausteniticstainlesssteels.

A:錯B:對

答案:對

Nopreheatingisrecommendedduringwieldingofduplexdueto

coarsegrain.

A:對B:錯

答案:錯

ThefuncitonofMoissimilartothatofChromiumthattendstostabilizealfa-Fe(bcc)anditshigh-temperaturecounterpartdelta-Fe(bcc).

A:錯B:對

答案:對

第四章測試

TheminimumhardnessinthejointofaFSWedprecipitation-hardenedaluminumalloysliesinthe().

A:thermallyaffectedzoneB:dynamicallyrecrystallizedzoneC:thermomechanicallyaffectedzone

答案:thermomechanicallyaffectedzone

Themainalloyingelementisfor7xxxalloys().

A:CuB:ZnC:MgD:MnE:Si

答案:Zn

Liquationcrackingandhydrogen-inducedcrackinginthePMZofaluminiumalloysarebothcausedbythecombinationofasusceptiblemicrostructureandthepresenceoftensilestresses.

A:錯B:對

答案:對

Freonhasbeenaddedtotheshieldinggastoreducehydrogeninaluminiumwelds.

A:對B:錯

答案:對

Purealuminumisnotsusceptibletosolidificationcracking.

A:對B:錯

答案:對

Liquationcrackingcanbereducedbyselectingtheproperfillermetal.

A:錯B:對

答案:對

ThecleaningactionoftheDCENcyclehelpsremovehydratedoxidesandhydrides.

A:錯B:對

答案:錯

Adjustingweldingsequenceishelpfultopreventtheformationofwelddecayinausteniticstainlesssteels.

A:對B:錯

答案:錯

Afineequiaxeddendriticstructurehasalowersusceptibilitytocrackingthanacoarsecolumnardendriticstructure.

A:對B:錯

答案:對

第五章測試

Generally,thecarboncontentofcastironsisgenerallyintherangeof().

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

答案:largerthan2.0%

Castironscanbeconvenientlygroupedaccordingtotheirstructure,mechanicalpropertiesandweldability;theyare().

A:CmalleableironsB:AGreycastironsC:DSGgraphitecastironD:BWhitecastirons

答案:Cmalleableirons;AGreycastirons;DSGgraphitecastiron;BWhitecastirons

()isextremelyhardandbrittle,inwhichmuchofthecarboninisretainedintheformofironcarbidewithoutgraphiteflakes.

A:CmalleableironsB:BWhitecastironsC:AGreycastironsD:DSGgraphitecastiron

答案:BWhitecastirons

Castingironswithpearliticmatrixownhigherstrengththanferriticmatrix.

A:對B:錯

答案:對

Malleableironsaremorereadilyweldablethangreyirons.

A:對B:錯

答案:對

Thebrazingweldneedannealingheattreatmentsothatitiseas