磷硼复合添加对Inconel 718合金铸态组织及均匀化处理参数的影响（英文）.pdf

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1、TransactionsofNonferrousMetals爱Avai：lableonSlinecaitewnwwc．secieDnceidrierect．ctomSocietyofChinaPressTrans．NonferrousMet．Soc．China22(2012)318—323WWw．tnmsc．enEfleetsofPandBadditiononas．castmicrostructureandhomogenizationparameterofInconel718alloyMIAOZhu-jun，SHANAi．dang，

2、WUYuan．biao，LUJun，HUYing，，LIUJun．1iang，SONGHong．wei1．SchoolofMaterialsScienceandEngineering，ShanghaiJiaoTongUniversity,Shanghai200240，China；2．BaosteelResearchInstitute，BaoshanIron&SteelCo．，Ltd．，Shanghai201900，ChinaReceived11January2011；accepted8October2011Abstract：Thee

3、fectsofphosphorusandboronadditionontheas．castmicrostmctureandhomogenizationparametersofInconel718werestudied．TheresultsindicatethattheadditionofphosphorusandboronpromotestheformationofblockyLayesphase．Duetothestrongsegregationbehaviorofboroninthefinalresidualliquid．alo

4、wmeltingB—bearingphaseenrichedinNb．MoandCrisobserved．Accordingtothedifierentialscanningcalorimeterresultsandelectronprobemicro．analysischaracterization．thesolidifieationsequenceofInconel718withphosphorusandboronadditioninbestcombinationisdeterminedas——++y—++y+MC+MC+Lav

5、es--~y+MC+Laves+Bbearingphase．Accordingly,thehomogenizationtemperatureisrecommendedtobeadjustedatleast40℃lowerthanthatofstandardInconel718duetotheexistenceoflowmeltingB-bearingphase．Keywords：P：B；Inconel718alloy；solidification；microstructure；homogenizationruptureandcree

6、ppropertiesofInconel718，whileless1IntroductionworkwasinvolvedwiththechangeofsolidificationbehaviorafterPandBaddition，especiallyfortheInconel718isthemostclassicalnickle—baseinvestigationonbestcombination．Inviewofthesuperalloysofar-accountingformorethan5O％Ofindustrialpro

7、duction．itisofgreatvaluetostudythecommercialsuperalloyproductionsintheworld『1]．solidificationprocessandhomogenizationtreatmentforHowever,theservicetemperatureofInconel718isproducinglargescaleingotsingoodquality．Hence，theres仃ictedto650。Cowingtofastcoarseningofthemainmai

8、nObjectiveofthisstudyistoanalyzetheas．caststrengtheningphase(tetragonalDO22-structure)，”phase)microstructureandhomoge