专业英语30672

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1、专业外语一、词汇1.氧乙炔焊(OAW)Oxyacetylenewelding2.电弧焊ArcWelding。3.熔化极气体保护焊gasmetalarcwelding4熔化极惰性气体保护焊metalinertgasesarcwelding(MIG)5.活性气体保护焊metalactivegasesarcwelding(MAG)6.钨极气体保护电弧Gastungstenarcwelding(GTAW)ortungsteninertgasarcwelding(TIG)7.埋弧焊Submergedarc

2、welding(SAW)8.激光束焊接Laserbeamwelding(LBW)9.电子束焊Electronbeamwelding(EBW)10.压力焊Pressurewelding。11.电阻焊resistancewelding。12.冷压焊Coldpressurewelding。13.摩擦焊接Frictionwelding。14.超声波焊接Ultrasonicwelding。15.高频焊接Highfrequencywelding。16.钎焊焊接Brazingwelding。17.黑色金属no

3、nferrousmetal。18.杂质impurity。19.不锈钢stainlesssteel。20.焊区weldingzone。21.表面硬化casehardening。22.临界点criticalpoint。23.渗碳carburizing24.淬透性hardenability。25.体心立方body-centeredcubic。26.面心立方face-centeredcubic。27.奥氏体austenite。28.铁素体ferrite。29.马氏体martensite。30.渗碳体ce

4、mentite。31.晶格crystallattice。32热应力thermalstress。33.珠光体pearlite34.脱碳decarburizing。35.热变形heatdistortion。36.二氧化碳carbondioxide。37.气孔porosity。38.电压降voltagedrop。39.正接straightpolarity。40.反接reversepolarity.阳极anode。阴极cathode。二、名词解释1.welding:weldingisthejoining

5、ofmetalsandplasticsbymethodsthatdonotemployfasteningdevices。2.ferrousmetal:Ferrousmetalsarethosewhichcontainiron.Nonferrousmetalsarethosewhichdonotcontainiron.3.nonferrousmetal:nonferrousmetalsmaycontainasmallamountofironasanimpurity.4.manualwelding:

6、Manualweldingisunderstoodbethatinwhichtheweldingvariablesarecontinuouslycontrolledbytheoperatorandmeansforweldingheldintheoperator’shand.5.steel:Steelisanalloycontainingchieflyiron,carbon,andcertainotherelementsinvaryingamounts.6.lowcarbonsteel:Low-c

7、arbonsteel,oftencalledsoftormildsteel,contains0.04to0.30percentcarbon(4to30points).7.heattreatment:Heat-treatmentisatermappliedtoavarietyofproceduresforchangingthecharacteristicsofmetalbyheatingandcooling.8.hardening:Hardeningisaprocessofheatingandco

8、olingsteeltoincreaseitshardnessandtensilestrength,toreduceitsductility,andtoobtainafinegrainstructure.9.tempering:Temperingisaprocessofreducingthedegreeofhardnessandstrengthandincreasingthetoughness.Itremovesthebrittlenessfromahardenedpiece.10.anneal