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《熱電偶保護(hù)套管耐鋁液腐蝕性分析》由會員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在教育資源-天天文庫。
1、太原理T大學(xué)碩士研究生學(xué)位論文STUDYONALUMINUMLIQUIDCORROSIONRESISTANCEOFTHERMOCOUPLEPROTECTIVETUBEABSTRACTAtpresent，non—ferrousmetalaluminiumprocessingindustriesconsumelamofyLiquidlu"hasthecharacteristicsofstronargeamountotenergLNmdaluminumhascharacteristicsOIstrong釤corrosion，permeabilityandeasyslagging．Thewor
2、kinglifeoftheliquidaluminumtemperaturemeasuringthermocoupleislowandthestainlesssteelthermocoupleprotectivetubecanonlylastforaboutaweek．Therefore，ithassignificancetostudyonthethermocoupleprotectivetubewithlongevity．Intheresearch，thecorrosiveexperimentofcastiron，stainlesssteelsandTi—A1alloyinliqui
3、daluminummacerationunderthetemperatureof750。Cwasconductedfirstly．Thenthetestsampleofcorrosionwasconductedonthemicrostructureobservationandthecorrosionstrength．Thenthemicrostructure，micro—hardnessandthecorrosionstrengthwerestudiedonthesamplesofnitrogentreatment．Theresultshowsthatthemicro—hardness
4、ofthesurfaceisevidentlyimprovedandthecorrosionresistancetoliquidaluminumisnotapparentforthestainlesssteelsamplesafternitrogentreatment．HoweverforthetreatedTi—AIalloysamples，theCorrosionresistanceinliquidAluminumisevidentlyimproved，thentheprocessofcorrosionisanalyzed．Ti．A1203ceramiccoatingswerepr
5、oducedbyusingplasmasprayingandlaserremeltingmethods，andplasmatissueshowstypicallayerstructureafterIlI太原理工大學(xué)碩士研究生學(xué)位論文spraying．Afterthetreatmentofthelaserremelting，thecoatingstructurebecomesrefined，dense，refinement，dense，well—distributedandthenon—moltenceramicparticledisappearsandtheremeltedlayerh
6、asnoporesappearing．Byusingmicro—hardnessmeasurements，foundthatthedegreeofcoatinghardnessincreasedsignificantlyafterlaserremeltingandthedegreeofhardnessincreasedabout140HV．AfterstudyingonthetransformationoflaserremeltedceramicTi—A1203ceramiclayeEThroughaluminumetchingunderthetemperatureof750。C，th
7、ecorrosionresistanceoftheplasmasprayedcoatinginthealuminumliquidandtheineffectivemechanismshavebeenstudied．TheresultsindicatethatthecorrosionresistanceofTi—A1203coatingishighunderhightemperatureandinthealuminumliquidenvironm
