滲碳合金鋼強烈淬火組織與性能研究.pdf

1、哈爾濱工程大學(xué)碩士學(xué)位論文滲碳合金鋼強烈淬火組織與性能研究姓名：劉臣申請學(xué)位級別：碩士專業(yè)：材料物理與化學(xué)指導(dǎo)教師：傅宇東20081201哈爾濱T程大學(xué)碩十學(xué)位論文AbstractAsanewpromisingheattreatmenttechnologyintensivequenchingprocess，foritsenergysaving，high—efficiencyenvironmentalprotectionandlow—co

2、stincomparison嘶tlltheconventionalprocess，attractswideattentionintheworldInthiswork，thecememsteel18Cr2Ni4WAand20CrMnTiweretreatedbyquenchingprocessAftermeasuringthemicrostructureandmechanicalproperties，theoptimumtreatment

3、processWaSobtainedbyanalyzingtherelationamongthemicrostructure，propertiesandprocessExperimentalresultsindicatedthesuperfinegrainscanbederivedfromthesteelsselectedbyintensivequenchingprocesswithcalciumbichloridewithdiffer

4、entconcentration，liquidnitrogenorcombiningthecalciumbichloridewitllliquidnitrogen，moreoverthecementsteelsshowedsuperhighintensityandexcellenttoughnessTheinvestigationimpliedthatthemicrostructureobtainedbyintensivequenchi

5、ngweremainlycomposedbylathmartensiteandresidualausteniteandsurfaceresidualcompressivestressWasbetween75310MPaIncomparisonwiththeconventionalheat—treatmentprocess，themechanicalpropertiesoflowcarbonalloysteel，suchastensile

6、strength，impacttoughness，Canbeimprove1030％bytheintensivequenchingprocessandCanmeettherequirementofcarburizingalloysteelpropertiesAnalysisshowedtheresidualcompressivestressontheintensivequenchingsurfaceWasresponsibleforth