SPHE鋼CSP連鑄坯非金屬晉夾雜物的研究.pdf

1、武漢科技大學碩士學位論文SPHE鋼CSP連鑄坯非金屬晉夾雜物的研究姓名：肖聰申請學位級別：碩士專業(yè)：鋼鐵冶金指導教師：王慶祥20110522第1I頁武漢科技大學碩士學位論文Abstract’11lenonmetallicinclusionsofCSPcontinuouscastingslabCROSS—seclionsofSPHEsteelsarestudiedmquantityparameteranddistributionofpar

2、ticlesizeinmetallographicalsample，andthecontent，morphologycharacteristicsandcompositionofinclusionsinelectrolyzedbulksampleofcross—sectionsareanalyzedbyimageanalyzerandSEM／EDSTheresultsprovidepracticalbasisforevaluatingc

3、leanlinessofCSPcontinuouscastingslabofthespotSPHEsteelsandproposingthemeasuresofreducingandimprovingthenon—metallicinclusionsinsteelsneresultsofmetallographicalsampleshowthatthedistributionoftheareapercentageofnon—metall

4、icinclusionsiSmorefluctuatecomparedwiththatofthenumberperunitareaoftheinclusioninthethicknessdirectionofcross—sections，boththedistributionoftheareapercentageandthenumberoftheinclusionsarerelativelystableinthewidthdirecti

5、on111enumberofsmallerinclusionswithvarioussizepresentsatrendofreducingfirstlyandincreasingafterwardfrombothinnerandouteraretothemiddleinthethicknessdirectionandthenumberofsmallinclusionsreachesamaximuminthemidlineThesmal

6、lertheparticlesizeofinclusionsisthemoreremarkabletheruleisThereiSnoobviousfluctuationwiththenumberdistributionofbiggeronesWhereasthedistributionofvariousparticlesizeiscomparativelyuniforminthewidthdirectionTheresultsofel

7、ectrolyzedbulksampleshowthattheaverageamountofinclusionsofthreefurnaceswhichobtainedbyelectrolyticseparationis1939mg／10kg11比nonmetallicinclusionsofbilletcontainmainlywiththesmallparticles，themassofwhichbelow50岬isabout3／4

8、accountingforthetotalmassThemorphologyofbiggersizenon—metallicinclusionsmostlypresentspolyhedronandblock，andthatofsmalleronesaleblockyglobularityandschistoseinthemainSimpleoxidesuchasCaO，Si02andA1203，complexinclusionofsi

9、licateandcalciumaluminateinclusionareincludedinthenonmetallicinclusionsofbilletNoobvioussulfideandnitrideinclusionsareexisted’Themeasuresareputforwardteducingandimprovingthenonmetallicinclusionsinsteelsaccordingtothefind

10、ings，includingcontrollingtheformationofinclusion，removalofthegeneratedinclusions，andthemodificationofinclusioninordertofurtherdecreaseitsquantityandreduceitsharmandSOonKeyWords：SPHESteel；CSPContinuousCastingSlab；BulkSamp