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(),AnalysisonQualityandLifetimeofRollerinHeavySectionMillPangZhaofuWeiMingyuan(AISCTechnologyCentre)AbstractTheservicelifeofrollerisconcernedwiththematerialdesignmachinework,insidemetallographicstvuctureandsoon.Throughthetestanalysingofineffectiverollers,thereasonsofoutofserviceanefoundoutandtheimprovingmeasuresareputformard.KeyWordsrollerguatitylifetime1,,21140014300510209254320,3700kW,49000kN,3.2m12,12,,;(9),12,,,,(E)(7.8413.72)104MPa,()2251427414MPa5,,,,,,,,3:(1),;(2),;(3);(4);(5);(6),,12,,,,,,,11MK236531;2;3;419975,,,,,2,4,,,,,6199911,,,,3Z=0.786b(b),2(70Cr3Mo)1,,,,,,3199753,1,270Cr3Mo,,70mm,512501700,5130mm,24t7,1242mm1241mm,11t,910mm150mm,3mm,50mm,,3mm,,,,23mm,,4,,31mm,770mm45,,,,,():1998619(4),7%,,,,,5,,,1.42,,70,,():19999128199911