熱噴涂層殘余應力的定量測量試驗研究.pdf

1、河北工業(yè)大學碩士學位論文熱噴涂層殘余應力的定量測量試驗研究姓名：王召煜申請學位級別：碩士專業(yè)：材料加工工程指導教師：李國祿201104熱噴涂層殘余應力的定量測量試驗研究iiTHESTUDYONQUANTITATIVEMEASUREMENTTESTOFTHERMALSPRAYCOATINGRESIDUALSTRESSABSTRACTInrecentyearswithnewtechnologynewmaterialsbedevelopeda

2、pplied.Thethermalspraytechnologyplaysomerolesincrosionresistwearresisthightemperatureresistinmemeareashavegreatlyincreasedthelifeexpectancyofparts.Butit’sinevitablethatthereareresidualstressesinthethermalsprayingcoatings

3、thentheresidualstresseswilltakegreatinfluencetotheperfmanceoftheproducts.Alotoffailuressuchascrackingdelaminationbucklingcanbeinducedbytheexcessiveresidualstressesinthecoatings.Therefeit’spositivelysignificantthatstudyin

4、gquantitativelytheresidualstressesinthethermalsprayingcoatings.InthisdissertationFeCrBSicoatingswereseparatelydepositedbysupersonicplasmasprayinghighvelocityoxyfuelsprayingplasmaspraying.Themicrostructurepositymechanical

5、propertiesofcoatingswereexperimentallydeterminedanalyzedbyScanningElectronMicroscopy(SEM)XRayDiffractometer(XRD)nanoindentiontester.Afterrelaxationofresidualstressesofthethermalsprayingcoatingbycuttingtheresidualstresses

6、withinthecuttingsidewasmeasuredbyMoirinterferometrymethodthedistributionalongthecoatingthicknesswasgained.TheresidualstressesonthecoatingsurfaceweremeasuredbytheXrayresidualstressmeasurementsystemindertomakeacomparison.T

7、hestressconstantwasinducedbytheycalculation.Theresidualstressesoftheequalintervaldistancewithinthecoatingsurfaceweremeasuredby4pointsmethod.Inadditiontheeffectofannealingtreatmentatdifferenttemperaturesdifferenttimeonmic

8、rostructuremechanicalpropertiesofsupersonicplasmasprayedFeCrBSicoatingswerestudied.Theresultsindicatedthatthecoatingdepositedbysupersonicplasmasprayinghasabettercombinationpropertythantheothertwokindcoatings.Residualstre