煙氣輪機轉(zhuǎn)子剩余壽命預測.pdf

1、沈陽工業(yè)大學碩士學位論文煙氣輪機轉(zhuǎn)子剩余壽命預測姓名：趙鉞申請學位級別：碩士專業(yè)：材料學指導教師：宋貴宏蓋秀穎20070305煙氣輪機轉(zhuǎn)子剩余壽命預測RemainingLifePreestimateofGasTurbineRotorAbstractGasturbineisthekeyequipmentinpetrochemicalsystemproduction，therotoroperateslongperiodinthecondit

2、ionofllightemperatureandcorrosivegasSometimesunplannedovertemperaturephenomenonoccurswhengasturbineisoperating，microstructuredeteriorate，andthatcausereductionofremaininglifeInthispaperitinvestigatesthemicrostructureandme

3、chanicalpropertieschangesofgasturbinerotormaterialGH864alloyintheconditionofsimulatedovertemperature，anddiscusstheinfluenceofthechangesofmicrostmcturetotheremaininglifeofthematerialTheapplicationofreplicatechniqueisresea

4、rchedinmetaUographicexaminationItisobservedclearlythestateoftheboundaryandtheconditionofCarbideprecipitatingintheboundaryfromtheplasticreplicawhichismadeofACpaperextractingthemicrostructureofalloyThesizeandquantityanddis

5、tributeof7phaseCanbeobtainedexactlyfromplastic—CarbondoublereplicawhichisproducedwithcollodionextractingthemicrostrucmreandinjectingCarbonStandardheattreatmentiscarriedoutongasturbinerotorblade，itmakestheperformanceretri

6、evedseinedegreesOvertemperatureueatmentof800“C、850℃、900“C、950ChasbeenoperatedonthebladeItisshownfromtheresearchthatwhenrisingtheovertemperature，thequantityofcarbideintheboundarydecrease，thesizeandquantityof7phasealseduce

7、s。SOaSthehardnessofthealloyOverternperaturetreatmentof2～16hourshasbeenoperatedonthebladeItisshownthat，whenprolongingtheovertemperaturetreatment，thecarbideofboundarydoesn’tchangeobviously，thesizeandquantityof7’phaseandhar

8、dnesshavealittledowntrendItindicatedthattheinfluenceofovertemperatureislargerthanholdingtimetothepropertiesofalloyAsstrengthenphasecarbidephaseand丫’phasehavedirectinfluencetothepropertiesofalloyHightemperaturetensileandh

9、iglltemperaturestressrupturetestiscardedoutonthematerialwhichtreatedunderdifferentovertemperatureResultsshownthatyieldstrengthandtensilestrengthreduce，alsodoespersistentlifeasrisingtheovertemperatureTheresultsoffractureI