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金属学报(英文版) 2000
GRAIN REFINEMENT OF MICROALLYED STEEL THROUGH HEAVY HOT DEFORMATION AND CONTROLLED COOLINGKeywords: microalloyed steel,grain refinement,heavy deformation,controlled cooling Abstract: 1.IntroductionAsfinegrainedsteelsshowmanyfaVowhlemechanicalpropertiessuchassbength,ductility,impactproperty,etc,grainrefinementhasbeenanimportantitemamongresearchstudies.Niohitunisveryoftenaddedtoimprovestrengthandlow--temperaturetoughnessOfTMCPsteelsbyinhibitingausteniterecrystallizationandgrain~dabingthermomechAncaltreatment.ItisgenerallybelievedthatthehanimtunferritegrainsizeofcommercialTMCPsteelsrangesfrom3to5Urn'--3),butithasbeenrePOrtedthatthefenitegrainsizecanbereducedto1--ZUmusi…
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