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:2004-03-26:(1973-),,1995,.:1009-9700(2004)06-0027-03Q345(,512123):Q345B,Q345BQ345C,Q345D.:;;:TG335.5+2:BRollingtechniquesforimprovingtheimpacttoughnessofQ345steelplatesWENZhi2hong(ShaoguanIron&SteelGroupCo.Ltd.,Qujiang512123,Guangdong)Abstract:TheeffectsofrollingprocessontheimpacttoughnessofQ345steelplatesareanalyzed.Thecontrolledrollingproce2dureformulatedbasedontestshasguaranteedasteadyproductionofQ345BandQ345Cgrades,andprovidedabasisforthede2velopmentofQ345Dgrade.Keywords:controlledrolling;impacttoughness;steelplateQ345,,,.1111,,,KKIC.K,K.,,,,,,.,[1].(1)..,.(2).,,.(3),,.,,..,,.112Q345(1).Q345B,Q345CQ345D,,,141200412SOUTHERNMETALSSum.141December2004.1Q345()(Akv)J+200-20-40AB34Q345C34D34E27,.+,.,,.2Q34521121111,,,,;SiMn,,.,,,.2.1.2Q345120t,LF,,220mm,1400mm.Q3452.2Q345%m(C)m(Si)m(Mn)m(P)m(S)m(Als)0.140.180.380.441.351.470.0220.0280.0070.0130.0040.0102.1.3:810min/cm;1280.2500mm+(),.30mm20mm.2.1.4--Q345,101055mmV,JB230B.2.22.2.1(1).20mm,3,4.34,,.3(Akv)J201#2#3#01#2#3#-20492916352713166126643375545213616244++8,1/4715,715+815,1/48,71510001036.,,,,,.,1050,920,865,30%.,,950,.[2],,.,,..(2),.5,0304(),0102,Q345B,,,950.82SOUTHERNMETALS20046530mm(Akv)J200-20019353488949510283573887090003624921:97710020453332190093921212,67,,,.:,,,,.620mm(Akv)J200-20051499174-940870,56%061048257-920840,47%07464527-956864,18%705+815,1/4815,71506+815,1/48,71507+8,1/48,7153Q345BQ345C,:810min/cm;1300.+,700780.1050,950,35%50%.,1040mmQ345B.,1300100%,135J,45J,289J,GB/T159129434J..Q345C.,Q345B,,0Q345C.Q345C(V0102%),0100%,126J,.4,,,.,Q345DE-20-40.[1].[M].:,1989.[2],,.[M].:,1995.2003,23..92141:Q345