拉力试棒取样标准汇总Word文档下载推荐.docx
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拉力试棒取样标准汇总Word文档下载推荐.docx
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1.2ThisspecificationappliestoallDanfoss-ManeuropPerformerscrolls.
Themaximumtemperaturetakenintoaccountinthisspé
cificationis450°
F(230°
C).
2.0
2.1APPLICABLEDOCUMENTSISO945-1994orASTMA247-67
NFEN1561orASTMA48-94a2.2
None
3.0
4.0
4.1GLOSSARYREQUIREMENTSThemechanicalcharacteristicsofthecastironshouldallowaproperresistanceofthepartsunderoperatingconditonsencounteredduringqualificationtestingandpropermachiningpropertiesthatcomplywithDanfoss-Maneurop’smanufacturingequipmentandprocess.
4.2Inordertoavoidanycompatibilityproblemwithrefrigerantandoil,theuseofanyrustprotectionorgrayironcoatingshouldnotbedonewithoutthewrittenagreementofDanfossManeurop.
4.3ThemechanicalstrengthoftheinvolutesofthePerformerscrollsisdirectlylinkedtothemechanicalstrengthofthegrayironandtothesizeofthegraphitelamellaswherethemachinedinvoluteisattachedtothescrollConfidential:
PropertyofDanfossCommercialCompressors,Trevoux,France.Nottobehandedoverto,copiedorusedbythirdparty.
UseofcontentstobeauthorisedbyDanfossCommercialCompressors.D059E
baseplate.Thechartbelowgivesthemechanicalpropertiesandthegraphitesizesaccordingtotheapplicationofthescrolls(refrigerant,airconditionning,refrigeration,other).Thegraphitecontainedintothecastironmustalwaysbeshape«
I»
nographiteaccumulationisallowed.TheevaluationofthegraphitesizeisdonebytheuseofISO945-1994standard.
Theconformityofthewrapmechanicalstrengthtothespecificationwillbecheckedbypickingsometestbarsup,asindicatedintheattachedannex(locationbetweenthebeginningofthespiralandthebeginningplus3PIradian),howeverthesuppliercouldsuggestanalternatecontrolplanoftheproduction,itmustbeagreedonbyManeurop.
Lookingatoneormoresectionsofinvoluteatalocationidenticaltotheoneusedonthetestbarwillchecktheconformityofthegraphitesize.Asanalternative,itcouldbepossibletocheckthegraphitesizeonthebrokentestbar.
Thepartmicrostructureis95%perliticintheinvolute,neverthelessferriteisallowedatadepthofover2mmallaroundtheinvolute.Tracesofcarbidesareallowed(steaditeandcementite)aslongasthemachinabilityisnotaffected.
Ahomogenoushardnessintheinvoluteandintheoldhamcouplingbumpsisrequired,thevariationbetweenthehardestandthesoftestpointsshouldbeequalto30HBasamaximum.Thepartwillbegrindedbeforethehardnessmeasurementinordertoeliminateapotentialferriticlayerandinordertoimprovetheballpointreading.
Confidential:
UseofcontentstobeauthorisedbyDanfossCommercialCompressors.
D059E
TheothercharacteristicsofgrayironwhicharenotdescribedinthisspecificationareincompliancewithgrayironGJL250orGJL300accordingtoNFEN1561orwithgrayironclass35orclass40accordingtoASTMA48-94a.
5.0ANNEX
PropertyofDanfossCommercialCompressors,Trevoux,France.Nottobehandedoverto,copiedorusedbythirdparty.UseofcontentstobeauthorisedbyDanfossCommercialCompressors.D059E
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