电厂锅炉管的高温腐蚀及金属陶瓷涂层防护

31319973JOURNALOFXIANJIAOTONGUNIVERSITYVol.313Mar.1997(,710049,)102T91TP347(Na2SO4õK2SO4),200MW102Cr3C22NiCrAl.,TP347,;102.,3,,,.102T91TP347TG113.231,35%40%.,,,,.,.200MW102T91TP347.Fe[13],3.3102Cr3C22NiCrAl(102).,.131,2,40mm10mm3mm,.102620,:1996208201.:,196211,,.©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.800900,,800..25%Na2SO4+75%K2SO4,12mgöcm2.200h.,,.13(%)CCrMoMnSiWVTiBNiPSNbCu102011021030150015201650132012801080111ö0102001015ööT9101088170019501460132ö0118öö01400101501010ööTP34701081810015021001100öööö121000102001010111001502(%)Cr3C2NiCrAl3210501491681022.1102102T91TP347800200h12.,4TP347($m),102T91,,102$m;$m$m,1102$m,2102T91TP347,102$m,TP347T91.T91TP347$m,,,TP347$m$m.11022102T91TP3472.22.2.1[4]Fe2Cr,Cr,Cr2O3.Cr(20%)Cr2O3.783:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,,CrCr2O3,TP347,,2.T91Cr817%,Cr2O3,FeOõCr2O3.,FeCrFeCr.Fe2+Fe,Fe,Cr2O3.T91Cr,Cr2O3,Cr2O3,Cr2O3,.Fe2+Cr,CrCr2O3,.,,TP347.102Cr,,,.102,.102,,.3ö,,.,,,.2.2.2(1).,,FeAl.2.,,.,3102[4].,ö,S.,S,,.S,S,,O2-,,Cr2O3,Cr2O3+O2-2CrO2-,.PbMoV,.Cr2O3Cr2O32Cr3++3O2-.8831©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,Cr.Cr2O3,,Cr,Cr2O3,Cr2O3,Cr2O3.(2)102102.1024,3,102().,,.102EDAX,SCrFe9101%38162%52137%,S.102Fe22Cr,,2,.,.102Cr2103%,Cr2O3,1,102.41025200h4005102,EDAX.,..,102,T91TP347,.(3)T91TP347.T91Cr(810%915%)102,102(12).9%CrCr2O3,.(6),ST91,S,,.TP347Cr,,7,,T91,.Cr,Cr2O3,Cr.EDAX,SCr1165%16199%.7,,,983:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved..,,.6T917TP3473(1),102,T91TP347102,TP347.(2),102,T91,TP347,.(3)102,,,.1,,.25Na2SO4275K2SO4(wt%).,1991,11(2):1881922,,.K2SO42Na2SO4Fe2Cr.,1991,11(1):17263,.Na2SO4Fe210Cr700.,1994,6(3):2092164..:,1994.60931©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.HotCorrosionofBoilerTubesandCermetCoatingProtectionChenHuaHanZhihaiMaYanMiaoJianfen(XianJiaotongUniversity,710049,Xian)Abstract102steeltubes(12Cr2MoWSiVTiB)arewidelyusedforsuperheaterofpowerplantboilers.Becauseofthehighimpurityofcoalandotheroperationproblems,hotcorro2sionandlocaloverheatingisveryserious.Inthispaper,hotcorrosionof102T91TP347steelswasstudied.Plasmaspraycermetcoatingonthesubstratesof102steelwasem2ployed.Itshowsthatthehotcorrosionof102steelismuchmoreseriousthanothersat800.Coatingcanprotecteffectivelythesubstratefromhotcorrosion.Keywords102steelT91steelTP347steelhotcorrosioncermetcoating(80)TheInvestigationoftheMicro-GrainCuCrAlloysandItsElectricalBreakdownPropertiesWangYapingCuiJiangouYangZhimaoDingBingjunZhouJingen(XianJiaotongUniversity,710049,Xian)AbstractThecontactmaterialshavetobedevelopedfortherequirementofvacuuminter2rupterswhichtendtobehighpowerandcompact.CuCralloyspreparedbyhighenergyballmillingandhotpresswereinvestigatedinthispaper.Theexperimentresultsshowthattheultra2fineCu2Cralloypowderscanbegotbyhighenergyballmilling.Thealloyremainedthepowdermorphologywhenhotpresswastakenat750,butthesaturatedCuphaseandCrphaseprecipitatedpartly;TheelementCuandCrwouldredistributeandtherecrystal2lizationtookplacewhenhotpressat920;Thegrainsizeofthesealloysis23Lm,muchsmallerthanthatofgeneralCuCrcontactmaterials.ThebreakdownmechanismchangedfortheexcesssolubilityofCrphases,thefirstbreakdowntookplaceonCuphases.Keywordsmicro2grainCuCrcontactmaterialshighenergyballmillingheatpresselec2tricalbreakdown193:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.