金相分析在轧辊强度计算中的应用

166200412JOURNALOFIRONANDSTEELRESEARCHVol.16,No.6Dec.2004:(19722),,,;:2004202210;:20042062091,2,1(1.,201900;2.,201900):,,,,1(14),,:;;;;:TG333115:A:100120963(2004)0620074205ApplicationofMetallograhicExaminationinCalculationofRollStrengthPENGHui,JIANGJin2xian,FEIYi2ruo(BaoshanIronandSteelCoLtd,Shanghai201900,China)Abstract:ThetensilestrengthoftheICDProllmaterialwithdifferenttypesofgraphitehasbeendetermined.Ac2cordingtothemicrostructure,thestrengthinwobblepartwhichhastheabnormalgreyspotshasbeencalculat2ed.Withthehelpoforiginalmilldesigndocuments,thesafetycoefficientoftherollhasbeenanalyzed.Therollshavebeenusedinproductionline.Notonlywastherollsaved,butalsothewaytosettlesuchkindofproblemswasfound.Thesafetyofrollswithcertaindefectscanbedeterminedbythetheoreticalcalculation.Keywords:roll;metallograhicexamination;graphite;ductilecastiron;strength,,,,,(),,,,,,1(B)(1),,(2),,,,1,(B),1113B,47,+(30%35%),1Fig11Macrostructureofgreyspots2Fig12Microstructureofgreyspots4B5%10%,,1121MHz015MHzB,,,,,2,B(),,,211,INIINNSE,1[1,2],B,B,B(A),(5),(a);(b);(c)3BFig13MicrostructureofrollbarrelforrollB576:12(a);(b)4BFig14MicrostructureofwobblepartofrollB1Table1InfluenceofgraphitetypeonpropertiesofductileironINN/MPa/J4005003123505002193003602145INNSE/MPa4505004004203503703703905AFig15MacropotosofgreyspotsforrollA,26,,;2ATable2TensilestrengthandimpacttoughnessofrollA123/MPa/J365337033753153315J,,,6,AB212,,[3]67200416(a);(b)6AFig16MicrostructureofgreyspotsforrollAB(,),:,,,,()B,,,2131,(INI),7,B,INI,,,21421411,T,(8)21412,B,INIINNSEA,B360370MPa,365MPaKHSchroder,,7INIFig17MicrostructureofrollneckforrollfromINICo8Fig18Schematicofrollingforcesactingonwobblepartsofroll776:12[4],(9)[5]9,365MPa,157MPa21413,12118MPa,115;88MPa,1124[6]B365MPa157MPa,365/12118=2199115,157/88=11781124BB,,9Fig19Tensilestrengthvsfatiguestrength2906t/mm,114,()3(1),,,(2),,(3):[1]INI.2003.[2]INNSE.2002.[3].[M].:,1978.[4]ESW.2002.[5]NSC.2003.[6]..1995.87200416