鋼鐵表面鋅覆蓋層顯微組織檢驗技術的研究.pdf

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3、訊齜例昂澎矍浚7緲f考㈣：鄉(xiāng)7夥浙江大學碩l：學位論文AbstractAbstractDisplaytechnologyofzinccoatingmetallographicsamplepreparationandorganization，researchontheroutinetestandprocessidentificationofhotdipgalvanizedandgalvanizedhaveimportantpractica

4、lsignificancefordevelopinglayermetallographicexaminationofzinccoveredsteelsurfaceInthispaperthesteelsurfaceofzincon4differentzincplatingcoveringlayersoftissuespecimenpreparationtechnologyandmicrodisplaytechnologywereinve

5、stigatedTheresultsobtainedareinfollowing：First，throughstudyingseveralsamplemountingmethodssuchasmechanicalclamping，pressing，coldinlaidmosaic，ametallographicspecimenwithzinccoveringlayerCanbepreparedbysuccessivelymechanic

6、alclamping，theroughgrinding，finegrindingandpolishingThespecimenpossessesagoodedgeeffectinwhichthezinccoveringlayerhasthesametestlevel、析thsteelmatrixSecond，thezinccoatingspreparedbydifferentprocessingwereetchedbyelevenetc

7、hantswithvariousrecipesandthentheirmorphologywereobservedbymetallomicroscopeItisbelievedthatthemicrostructureofzinccoatingaswellassteelmatrixCanbeclearlyobservedbyusing2％4％nitricacidalcoholsolutionofpicricacid，alcoholsol

8、utionIfonlythemicrostructureofzinccoatingneedtobeobserved，thewatersolutionofhydrochloricacid，chromateorchromicanhydridesodiumsulfatesolutionCanbeusedasetchantsEtchmightnotbecarriedoutforobservingthetissueobtainedbytherma

9、lspaycoatingThirdcomparedthehotdipgalvanizedspecimenwitllelectrogalvanizedsample，themaindifferencebetweentwomethodsistheexistenceofawidthrangingfromthedentatebandorganization口1)SuchorganizationCanbeobservedatthelayerofho