连铸坯轧重轨的压缩比及帽形孔和切深孔的应力场分析

()(()),。,,,,。,,。,。,,。①REDUCTIONRATEANDSTRESSFIELDINTHEHEAVYRAILROLLEDWITHHATPASSANDCUTTING-INPASSFROMCONTINUOUSLYCASTBLANKWUDiZHAOXianmingLIJianchaoHEChunyu(NortheasternUniversity)WANGYongmingXULieping(BaotouIronandSteel(Group)Co.)ABSTRACTTherollingreductionrateaftercutting-intothefinishpasswasstudiedforcontinuouslycastblanks.Thestressfieldafterhatpassandcutting-inpasswereanalyzedbyFiniteElementMethod.Theconclusionisasfollows:Incaseofreplacingbloomfromingotbycontinuouslycastblanks,iftheblanksizeandpassscheduleisnotchangedcorrespondinglythereductionrateissmaller,thequalityofrailheadandheavyrailbottomisnotensured.Withtheexistinghatpassandcuttign-inpass,thereisatensionstressinheavyrailcrosssection,whichcanbeneglectedfortheheavyrailrolledfromtheblooms,butfortheheavyrailsrolledfromcontinuouslycastblanks,thistensionstressdeterioratestheheavyrailquality.KEYWORDSreductionrateforheavyrail,passdesignforheavyrail,continuouslycastblankstressfieldinrolledrail1①:,,(110004)。,,,,。。,,,,。,。,,,,,。,。,,。2,,。[1,2]。、,,。,,10[1]。。,,,,,,,。。-,,。,,。,,。,,。,,,。,,。,,,。。(1),1.25,1.66;1.375,1.4,4.45。,,。。,,,。,,,。,10,。,,。,。。,。1Fig.1Thecutting-inpassofheavyrail3,·62·37(3),2。2Fig.2ThenodesandelementsofFiniteElementMethod3,34。3,3,,,,,,。,。4,,,333Fig.3ThestressfieldofrolledrailforNo.3hatpass(a)x;(b)y,。,,。-,,,,。,,,,,。4Fig.4Thestressfieldofrolledrailatcutting-inpass(a)x;(b)y44.1,。:①3,10%,;②,20%～30%,。4.2,,。:①,,;②,。5(33)·72·5:1Fig.1Scatteringpicturebetweentemperingtemperatureandhardness1995～20005,,2895,,;、、,,500,。4(1),,。(2),,。1.50/250Hz.,1991(5):36～41.2,..:KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK,1998.(2L)(1),,。,。。,。(2)3,,,。,,。(3)M,,,,。,,,,,,。(4):,10N,;,20N～30N,。(5),,。,,。,。1..,1995,(1):49～52.2..5OL6901.PQQP5: