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1,1,2(1.,430070;2.,430070)[]2,,,[];;:TG306:B:1000-8446(2003)03-0011-03TheReasonthatCausedtheEccentricityoftheSeamlessSteelPipeandtheMethodtoPreventtheEccentricityZHUChun2dong1,ZHUHong2yan1,ZHAOJing2bin2(1.WuhanUniversityofTechnology,Wuhan430070,China;2.WuhanHeavyCastingandForgingLtd.,Wuhan430070,China)Abstract:Relatingwiththeexperienceandpracticesinthepreparationfortheseamlesssteelpipeandinthedesignofthedie,thereasonthatcausedtheeccentricityofthesteelpipeforgingwasana2lyzed.Themethodtopreventtheeccentricitywasdiscussedfromtheaspectsoftechnologicalprocessanddiestructure.Itcanserveasareferenceforthesteelpipeindustryandforprocessinglongcanister2shapedpartswithhighrequirementintheiraperture.Keywords:plasticdeformation;seamlesssteelpipe;eccentricity:2002211207:(1963-),,,,11,2,,2,,,,,,,,1112CrMoV,,4500t2000t1:12211,,,222,,,,(1),,,,,,(2),,,,,,,,,,(3),,(4),,,(5),,,,3,3.1,()(),[1],,331.2.3.4.5.6.3.22[2],(1),,(2),;,;,(3),,21METALFORMINGTECHNOLOGYVol.21.320034,4(4),(5),,90,4,,,,[][1].[M].:,1985.[2].[M].:,1984.(10)5,,;,(5),,,(400450),(),,b,5(1)Conform,,,,,,,,(2),,,810r/min(3):,,;,,;(400450),710r/min,0.40.8mm,D[][1],.[M].,1989,9.[2],,,.6063[J].,1999,(1):31-32.[3],,,D[J].,1999,20(4):269-273.[4],,.ConformD[J].,1999,20(3):176-174.31