低碳鋼表面機械能助滲鋁工藝及滲鋁層性能研究.pdf

1、山東大學碩士學位論文低碳鋼表面機械能助滲鋁工藝及滲鋁層性能研究姓名：董瑞華申請學位級別：碩士專業(yè)：材料學指導教師：李木森20080513山東大學碩士學位論文ABSTRACTBasedontheexperimentstheoptimumcomponentsofthemechanicalenergyaidedaluminizingagentandthemaintechnicalparameters，suchastemperature，tim

2、eandfillersize，etc，werestudiedinthisdegreethesisNewactiveagentsandfillerswereusedtooptimizethecomponentsandtheparametersandalsoteduceitscostAaluminizedlayerwitllmorethan100Umthicknesscouldbeformedbythemechanicalenergyaid

3、edaluminizingat600。Cfor3hourson08FsteelTheexperimentalresultsofdiffusionannealingOilthealuminizedsteelsshowedthatthediffusionreactioncouldCalTyonat700“C，thecompletediffusionofthealuminizedlayeronthesteelscouldcarrythough

4、at800“Cfor4hoursThelayersonlyconsistofloweraluminumphaselikeFeAIandFe!A1Themicrostructure，surfacemorphologiesandcompositionofthealuminizedlayerandtheeffectsofthecomponentoftheagentonitsdefectswereanalyzedbymetallographic

5、microscope，electronprobe，XraydiffractorandtransmittingelectronicmicroscopeExcellentwearresistanceofthealuminizedsteelsWasobtainedduetothehigherhardness，morethan800Hv01，oftheirsurfacelayers，andalsoexcellentcorrosionresist

6、ancetoNaCI、H2S、H2S03、HN03andoxidationresistanceatelevatedtemperatureofthemwereshowedbytherelativeexperimentsThematrixofthealuminizedsteelscouldkeepitsoriginalmechanicalpropertiesbecauseoflowerTheexperimentalresultsshowed

7、thatthehigheraluminizingratecouldalsobeobtainedon1Crl8Ni9steelorpuretitaniumbuthemechanicalenergyaidedaluminizing，butthereWasadifferentbetweentheyandcarbonsteelsinanondiffusionpurealuminiumlayercontaininginthealuminizedl