金属工艺学试题Metal technology examination questions.docx

金属工艺学试题Metal technology examination questions.docx

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金属工艺学试题Metaltechnologyexaminationquestions

金属工艺学试题（Metaltechnologyexaminationquestions）

Fillintheblanks（1,40centsperspace）

Themechanicalpropertiesofmetal1,mainly-------_________________________________etc..

Thebasicstructureof2,ironcarbonalloyatroomtemperatureis______________________________and_________etc..

3,accordingtothecommoncarbonsteelcarboncontentisdividedinto_____________________________.

4,theprocessofheattreatmentiscomposedof________________________________threestages.

5,theoverallheattreatmentiscommonlyused________________________________________etc..

6,accordingtotheexistingformofironcarbon______________________________________________.

7,accordingtothebasicstructureofgraycastironwithdifferent___________________________________

Copperalloyiswidelyusedinindustry,accordingtothe8different____________________________chemicalcomposition.

9linecanbedividedinto___________and___________.

10,thecuttingamountmainly___________________________________calledcuttingthreeelements.

11,usuallythecastingisdividedintotwocategories________________________.

12,SMAWcommonlyusedarcmethodis____________and____________.

13,isthemaintoolofdrillingdrill,whichiscomposedof___________________and___________.

Two,individualchoicequestions（1pointspergame,40points）

1.Metallicmaterialsexhibitmechanicalproperties

Aconductivity,B,oxidationresistance,C,thermalconductivity,Dhardness

2.Themaximumnominaltensilestressbeforethebreakiscalled

Ayieldstrength,Btensilestrength,Cplasticstrength,Dcompressivestrength

3,themetalplasticjudgmentisbasedontheelongationand

Ahardness,Bstrength,C,sectionshrinkage,Dyieldlimit

4.Thetoughnessofmetalsusuallydecreaseswithtemperature

Agetsbetter,Bchanges,Cdoesn'tchange,Diswrong

5.Inthephasediagramofironcarbonalloy,theECFlineis

Aliquidus,Beutectoidline,Csolidus,Deutecticline

6,steelisironasthemainelementofironcarbonalloy,generallylessthancarboncontent

A0.77%,B2.11%,C4.3%,D6.69%

7,carbonsteelimpuritiesoftenexist,whichisharmfulelements

Asilicon,Bmanganese,Csulfur,Dcarbon

8,No.45highqualitycarbonsteel,theaveragecarboncontentis

A45%,B4.5%,C0.45%,D0.045%

9,thecaststeelZG200-400statementiscorrect

A200istheminimumvalueofyieldpoint,andB200isthelowesttensilestrength

C400istheminimumyieldpoint,andD400isthehighesttensilestrength

10.Theroomtemperatureobtainedafterquenchingisasfollows

Aaustenite,Bcementite,Cbainite,Dmartensiteorbainite

11,the40Grstatementiscorrect

Acarburizingsteel,Bquenchedandtemperedsteel,Ctoolsteel,Dhighspeedsteel

12.Thefollowinghigh-qualitycarbonstructuralsteelsareusedformakingsprings

A,Q195,B,08F,C,35,D,65

Theaveragecarboncontentin13andT12is

A12%,B0.12%,C1.2%,D0.012%

14.Whatiscorrectforcompleteannealingisthat

Acanreducehardness,Bismainlyusedineutectoidsteel,andCisausteniteafterannealing

Disnotgoodforcutting

15,alloysteelquenchingcommonlyusedcoolingmediumfor

Awater,Boil,Cbrine,D,limewater

16,inordertoimprovethecorrosionresistanceofsteelpartsforthepurposeofoptional

Acarburizing;Bquenching;C;highfrequencyheating;surfacequenching;Dnitriding

17,therepeatedtemperingofW18Gr4Viscorrect

Ahardnessdecreased,Bhardnessincreased,Chardnessunchanged,Dwaswrong

18.Thegraphiteinmalleableironis

AlargeshapedBclusterCDsphericalworm

19,whenapartofthecastingiswhitecastiron,willbeheated850-950insulation,thepurposeis

Agraphiteisrefined,Bgraphiteisdecomposed,andCcementiteisdecomposedintographite

Cgraphiteisdecomposedintocementitedays

20,theperformanceoftherustaluminumiscorrect

AweldableBwithoutdeformation,Cstrengthlowerthanpurealuminum,Dplasticdifference

21.Whatiswrongwiththebronzestatement?

A,Wsn<5%,suitableforcoldworking,BWsn=5%-7%,suitableforhotworking

CWsn>10%,suitableforcastingC,Wsn>20%,plasticisthebest

22.Thefollowingarethermosettingplastics

Aelectricjade,Bpolyethylene,Cpolypropylene,Dfluoroplastic

23.Safetyglassis

AakindofplasticBrubberproduct,Cceramicproduct,Dglasscompositelayer

24,ashaftfor20.045iconsize,measurementtoolsfor

ABCdialverniercalipermicrometerDsteelruler

25,thecharacteristicsoffitterprocessingiscorrect

AcanproduceBinlargequantitiesandmanufacturehigh-precisionparts

Cstrongworkforce,smallDproductivity

26,whencutting,thebody'scenterofgravitytofallin

AleftfootB,rightfootCorso,feetcanbeD,rightfootbent

27,filing,filefromageneralspeedperminute

A10times,B10-20times,C20-30times,D30-60times

28,thereisamaterialmeasurementofhardnessofHBW500,tomeasurethepressureheadstatementiscorrect

Aroundcarbideball,Broundsteelball,Cdiamondtaper,Ddiamond,fouredges

29,thegreatertheimpacttoughnessofthematerial,itstoughness

Athebetter,theworsetheB,theCisneither,noristheDabove

30.Inthephasediagramofironcarbonalloy,thePSKlineisaeutectoidline,andtheeutectoidproductis

Aferrite,B,pearlite,C,austenite,D,bainite

31.Intheironcarbonalloyphasediagram,anyironorcarbonalloywithanycomponentbelowtheACEFlineis

AsolidBliquidCliquidsolidcoexistenceDiswrong

32whencarboncontentincarbonsteelis20%,thiskindofsteelis

Alowcarbonsteel,Bmediumcarbonsteel,Chighcarbonsteel,Dcarbontoolsteel

33,normalizingandannealingarecorrectcomparedto

Anormalizingcostishigh,Bnormalizingtimeislong,Cnormalizinghardnessishigh,Dnormalizingstrengthislow

34,castironwhitespotatthewhitephenomenon,themainreasonisthat

Achemicalcomposition,B,coolingtooslowly,Ccoolingtoofast,Diswrong

35.Thedescriptionofmalleableironiscorrect

AcastingBgraphiteclusterCinstrengththangrayironlowDshortannealingtime

36,knownas"SiMingMing"alloyaluminumis

Aantirustaluminium,Bwroughtaluminumalloy,Ccastingaluminiumalloy,Dsuperhardaluminium

37,rubberstatementiswrong

Alowelasticity,Bgoodvibrationabsorption,Ceasyaging,Dgoodinsulation

38,thedialindicatorstatementiscorrect

TheAscaleis0.1MMB,andthescaleis0.01MMC.Theabsolutevaluecanbemeasured

Dsmallpointer,eachgridreadingis0.01MM

39,inordertoachievedimensionalaccuracyandsurfaceroughnessrequirements

ABandCcrosscoarsefileintheDfileandpushthefine,smoothand

40,thethreadprocessingiswrong

Atapthethreadbeforedrilling,Btapisusedtoprocesstheexternalthread

CdieprocessingthreadDthread,firstdeterminetheroddiameter

Three,Janeanswer（6pointspergame,atotalof12points）

1.Whatistheeffectofgrainsizeofmetalonitsmechanicalproperties?

Howtocontrolthecrystallizationprocessofliquidmetalinordertoobtainfinegrain?

2.Explainthecausesofweldingstressanddeformation.Howtopreventandreduceweldingdeformation?

Four,comprehensivequestions（8points）

Drawasimplifieddiagramoftheironcarbonalloyandanalyzetheequilibriumstructureofthe45steelwhentheliquidiscooledslowlytoroomtemperature.

Referenceanswer

One,1,strength,hardness,plasticity,2,ferrite,pearlite,cementite,austenite,austenite

3,highcarbonsteel,mediumcarbonsteel,lowcarbonsteel4,heating,insulation,cooling5,annealing,normalizing,quenching,tempering

6,whiteirongrayironmalleablecastironductileiron

7ferriticferritecastiron,pearlitegreycastiron,ferritepearlitegraycastiron8,brassbronze,100copper9,naturalrubbersyntheticrubber,generalrubber,specialrubber10,planescribing,andstereomarking

11,thecuttingspeedfeedbackengagementof0.1mm12,0.05mm0.02mm

13,sandcasting,specialcasting14,knockmethodscratch