CaSRE系超易切削钢的研究开发

CaSREX1,1,1,2,2,2,2,2(11,100083;21,271104):115t,,,,Mn2RE2Ca2S,,,:;;:TG142:A:100420277(2005)0520048205,,,,,,,90%,,[1,2],,,[1,36],1111Y20CaSRE115t,113t,,70100(:10-6),(,%):C01170123;Si01050150;Mn01801150;P01040108;S01100125;Ca01002;RE01020105;Ti010031150750,150mm150mm,5501ö3004ö350135mm112(),()(Tömin),(Vb)0150mm0130mmC6140YT14,:Co=10Ao=6265200510ChineseRareEarthsVol126,No15October2005X:2005203230:(50274004):(19452),,,,©1995-2006TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.Ks=-3kr=75kr’=15:f=01195mmör,ap=1mm;T=200260320360mömin;45,T=120135150170mömin;14040mm,t,Vb,Vb=0130mm,T,4TtVb,,,SEMEDS113MTS810HB-3000B,1Y20CaSREY201Y20CaSRE(GBöT8731-1988)Table1MechanicalpropertiesofY20CaSREandagradeofthenationalstandardinChina(GBöT8731-1988)öMPaöMPaö%ö%öHBY20CaSRE4225752447217Y20-4506002030175114,,16mm12mm,10mm,,2mmLEO1450(),,KEVEXsigmaJSM-6301F2211Y20CaSRE,,C,,,(12);34Y20CaSRE,,,(Vb=0115mm),(0130mm),Vb=0115mm,T-M,5,M60(T60,):CaSRE,M60=36615mömin;45,(M60)j=12711möminY20CaSRE:Kr=M60ö(M60)j=218841Y20CaSREFig11TurningsofY20CaSREsteel2Y20CaSREFig12HighqualitysurfacesofturnedY20CaSREsamples945:CaSRE©1995-2006TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.3Y20CaSREFig13WearofthecutterswithmachningtimeforY20CaSRE445Fig14Wearofthecutterswithmachningtimefor45steelY20CaSRE45,2126,()5Y20CaSRE45YT14T-MFig15T-McurvesofYT14turningcuttersforY20CaSREand45steels,2,,SMnCeTi,AlCa,,(a)4T=260mömin(b)6T=300mömin6Fig16Photoesoftherakefaceofturningcutters21378Y20CaSRE,MnS,,,MnS,[1]0526©1995-2006TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.2Table2CompositionsofthebaseandtheprotectingfilmsontherakefaceofusedturningcuttersAlSCaCeMnFeCoTiW-----11054719811093918840166271960139318657157112-2152-60100231350129218247158-01773152141337Y20CaSREFig17BEimagesoftheinclusionsinas-castsamplesofY20CaSREsteels8Y20CaSREFig18BEimagesoftheinclusionsunderJSMinas-rolledsamplesofY20CaSREsteels214,[7],,,,,,,,,,,,,,Ca2RE2Mn2S,3Y20CaSRE,(GBöT87311988)Y20(80)155:CaSRE©1995-2006TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.:[1],1Y2O3[J]1,2003,24(5):502521[2],1[J]1,1997,15(2):911[3]1[J]1,2000,28(2):291[4]1[M]1:,19961421EffectofY2O3andLa2O3onMicrohardnessandCorrosionResistanceoftheCeramicLayerLIUYu2yan1,CHENLin1,XUJian1,MAPeng2qi2(11InnerMongoliaScienceandTechnologyUniversity,Baotou014010,China;21BaotouDamoRareEarthCo.,Ltd.,Baotou014010,China)Abstract:EffectofY2O3andLa2O3additivesonmicrostruchardnessandcorrosionresistanceoftheceramiclayerhasbeenstudied1TheexperimentshowsthatY2O3andLa2O3additivesreduceporosityoftheceramiclayer,increasethecorrosionresistancetoacertaindegree1La2O3hasabettereffectthanY2O3onimprovingthepropertyofceramiclayer1Keywords:rareearths;ceramic-lined;hardness;corrosion(51),,,,:[1]1[M]1:,199914321[2]1[J]1AmericanMachinist,1991,135(10):191[3],,,1[J]1,2002,20():681[4],1[J]1,1993,29(2):581[5],,,1[J]1,1995,84(3):291[6],,,1[J]1,1996,20(5):271[7]1[M]1:,20011311DevelopmentofCaSREUltra-Free-CuttingSteelLILian2sheng1,ZHURong1,YINHao1,LIUPing2,ZHANGLi2ping2,WEICheng2zhi2,ZHOUPing2,DONGJie2(11SchoolofMetallurgicalandEcologicalEngineering,USTB,Beijing100083,China;2.TechnologicalCentre,LaiwuIronandSteelGroup,Laiwu271104,China)Abstract:Anoveltypeofenvironment-friendlyfreecuttingsteelhasbeendevelopedbytreatmentofsulphur-bearingsteelmeltwithcalciumandrareearthelementsinaninductionfurnaceof115t1Themachiningandmechani2caltestsofthesteelwereconducted1ThemachinabilityofthesteelisexcellentanditsmechanicalpropertiesmeettherequirementsofcorrespondinggradesofthenationalstandardofChina1ThecompoundinclusionsofMn-RE-Ca-SsysteminthesteelwerestudiedindetailintermsofSEMandEDS1Itisshownfromtheinvestigationthatthesein2clusionsproduceaprotectingfilmontherakefaceofthecuttersduringmachiningprocess1Thisfilmwillrelievewearofthecuttersandfairlyimprovethemachinabilityofthesteel1Keywords:freecuttingsteel;rareearth;calcium0826©1995-2006TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.