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1、金属工艺学试题（Metaltechnologyexaminationquestions）Fillintheblanks(1,40centsperspace)Themechanicalpropertiesofmetal1,mainly-------_________________________________etc..Thebasicstructureof2,ironcarbonalloyatroomtemperatureis______________________________and_________etc..3,according
2、tothecommoncarbonsteelcarboncontentisdividedinto_____________________________.4,theprocessofheattreatmentiscomposedof________________________________threestages.5,theoverallheattreatmentiscommonlyused________________________________________etc..6,accordingtotheexistingformo
3、fironcarbon______________________________________________.7,accordingtothebasicstructureofgraycastironwithdifferent___________________________________Copperalloyiswidelyusedinindustry,accordingtothe8different____________________________chemicalcomposition.9linecanbedividedi
4、nto___________and___________.10,thecuttingamountmainly___________________________________calledcuttingthreeelements.11,usuallythecastingisdividedintotwocategories________________________.12,SMAWcommonlyusedarcmethodis____________and____________.13,isthemaintoolofdrillingdri
5、ll,whichiscomposedof___________________and___________.Two,individualchoicequestions(1pointspergame,40points)1.MetallicmaterialsexhibitmechanicalpropertiesAconductivity,B,oxidationresistance,C,thermalconductivity,Dhardness2.Themaximumnominaltensilestressbeforethebreakiscalle
6、dAyieldstrength,Btensilestrength,Cplasticstrength,Dcompressivestrength3,themetalplasticjudgmentisbasedontheelongationandAhardness,Bstrength,C,sectionshrinkage,Dyieldlimit4.ThetoughnessofmetalsusuallydecreaseswithtemperatureAgetsbetter,Bchanges,Cdoesn'tchange,Diswrong5.Inthe
7、phasediagramofironcarbonalloy,theECFlineisAliquidus,Beutectoidline,Csolidus,Deutecticline6,steelisironasthemainelementofironcarbonalloy,generallylessthancarboncontentA0.77%,B2.11%,C4.3%,D6.69%7,carbonsteelimpuritiesoftenexist,whichisharmfulelementsAsilicon,Bmanganese,Csulfu
8、r,Dcarbon8,No.45highqualitycarbonsteel,theaveragecarboncontentisA45%,B4.5%,C0.45%,
