搜索
15120032JOURNALOFIRONANDSTEELRESEARCHVol.15,No.1Feb.2003:(59874023,50174048):(19622),,,;:2001212224;:2002203225,,(,100081):,:;;;;:TF701.3:A:100120963(2003)0120062205EvaluationMethodforSteelCleanlinessXUEZheng2liang,LIZheng2bang,ZHANGJia2wen(CentralIronandSteelResearchInstitute,Beijing100081,China)Abstract:Themethodstoevaluatethesteelcleanliness,includingtheamount,type,morphologyandsizedistributionofnon2metallicinclusions,andcomparisonofthemethodswerediscussed.Theresultsshowedthatthesteelsproducedbydifferentprocesseswithalmostsamecontentoftotaloxygenhavedif2ferenttypesandsizedistributionofnon2metallicinclusions.Thesizedistributionofnon2metallicinclu2sionsdeterminedbyimageanalyzercouldntreflecttherealityofnon2metallicinclusionsinsteel.Keywords:non2metallicinclusion;chemicalanalysis;standarddiagram;imageanalyzer;electrolyticextrac2tionmethod,,,11.1[1],,,[2,3]1.2(ISO)(ASTM)GB105612894[4],A()B()C()D(26)80mm,0.8mm100ABCD,5,JK15ASTM0.52.5,,,,1[5]CaS1Table1Ratingofnon2metallicinclusionusingstandarddiagram%%ABCD0.01100.01810.00160.00190.51.01.01.51.01.01.51.500000000.50.00140.00150.00150.002201.02.02.00001.00031.500.50.50D,B,1[6]1010-6,,1.3100200,,1BFig.1RelationbetweentotaloxygencontentandratingoftypeBinclusions()50100,1.4,,,,,23kg;,(1020)mm(80120)mm,,[7]60Si2MnA[5],,361:2,;,,,22.1,50100,(MnS),B,,,(2),,,,,,MnS2.234(60Si2MnA)200(3mm)()4234:202Fig.2Morphologyofelectrolyticallynon2metallicinclusions(a)a;(b)b;(c)c;(d)d3Fig.3Sizedistributionofnon2metallicinclusionsfrommetallographicspecimens462003152Table2RefiningprocessandcompositionofspecimensPmmP%P%P%abcd2927202573.186.471.645.80.01810.00150.01100.00140.00190.00220.00160.0015m;4,,16m,1.933.43m;4434,,20m,100m,20m,,,4,(40m);3(1)(a)a;(b)b;(c)c;(d)d4Fig.4Sizedistributionofnon2metallicinclusionsfromelectrolyticallyextractedspecimens561:2,,,(2),,D(3),,,,(4),,:[1].[M].:,1991.[2],,,.[J].,2001,36(12):20223.[3],,,.[J].,2002,37(1):24227.[4]GB10561289,[S].[5].[D].:,2001.[6],.[J].,1994,15(2):127.[7],,.[A]..[C].:,1998.15228.(37):[1].[M].:,1988.[2].[M]..:,1989.[3]WL.[M]..:,1992.[4].Tir[J].,1992,(8):59265.[5],,,.Ti2IF[J].,2000,36(6):6132617.[6].[M].:,1983.[7]UrabeT,JonasJJ.ModelingTextureChangeduringtheRecrys2tallizationofanIFSteel[J].ISIJInternational,1994,34(5):4352442.[8]ParkYB,LeeDN,GottsteinG.EvolutionofRecrystallisationTexturesfromColdRollingTexturesinInterstitialFreeSteel[J].MaterialScienceandTechnology,1997,13(4):2892297.[9]KestensL,JonasJJ.ModellingTextureChangeduringtheRe2crystallizationofaColdRolledandAnnealedUltraLowCarbonSteelPreviouslyWarmRolledintheFerriteRegion[J].ISIJIn2ternational,1997,37(8):8072814.[10]RW.,[M]..:,1986.[11]BarnettMR,KestensL.Formationof{111}110and{111}112TexturesinColdRolledandAnnealedIFSheetSteel[J].ISIJInternational,1999,39(9):9232929.[12]BarnettMR.RoleofIn2GrainShearBandsintheNucleationof111NDRecrystallizationTextureinWarmRolledSteel[J].ISIJInternational,1998,38(1):78285.[13]ParkYB,KestensL,JonasJJ.EffectofInternalStressesinColdRolledIFSteelontheOrientationsofRecrystallizedGrains[J].ISIJInternational,2000,40(4):3932400.66200315