崔玉杰：罗奇钢铁公司耐磨钢性能介绍和应用.ppt

Raexwearresistantsteelinconcreteapplications,RaexWearresistantsteel,RuukkisHotrolledSpecialsteelgrades,YieldStrength(N/mm2),Hardness(HBW),Laser,OptimQLOptimML,Raex,High-StrengthandUltraHigh-StrengthSteels,OptimMC,OptimQC,400,500,300,Wear-resistantSteels,Raexsteelgradesandapplications,Raex300DeliveredasstripproductsConcretemixersRaex400Deliveredasstripproducts,heavyplatesandtubesTipperbodies,excavatorbuckets,agriculturalmachineryRaex450DeliveredasstripproductsandheavyplateproductsHeavydutytipperbodiesRaex500DeliveredasstripproductsandheavyplateproductsCrushers,excavatorbucketlipblades,Raexsteels,hardnessvalues,Raexdimensionalrangeandtypicalmechanicalproperties,Thicknessranges,Typicalmechanicalproperties,Raex-relativelifetimeExampleofabrasivewearingtestresults,Raex500,Raex450,Raex400,Q345,Optim650MC,HardnessHBW,Relativelifetime,Raexwearresistantsteelinconcreteapplications,Wearingmechanisms,WearresistanceofRaexsteel,Whatiswearing?,Material(weight)lossfromsurfaceduetorelativemotionbetweensurfacesFourwearingmechanisms:adhesivewearingabrasivewearing(mostcommon)3differenttypes:sliding,impactandsqueezingfatiguewearingtribochemicalwearingAlmostalwayswearingiscombinationofabovemechanisms,Somefactorsinfluencingtowearing,DesignShapeofthepartsLoadsContactareaTypeofmotionSpeedofmovements,AbrasivematerialpropertiesHardnessShapeSizeToughness,WearresistancematerialpropertiesChemicalcompositionMicrostructureHardnessSurfacequality,OperatingConditionsLubricationTemperatureAcidity,Surfacedamage-SlidingWear,HighWearRate-Ifmineralismorethan1,8timesharderthanplateLowWearRate-Ifmineralislessthan1,2timesharderthanplateRelativehardnesscalculation,DevicetestPinondisk,crushingtest,Theequipmentisbasedonthepin-on-diskprincipledescribedintheASTMG99standard.Thedeviceisdesignedforthree-bodyabrasiveexperiments.Inthetests,thepinisrepeatedlypressedagainstthegravelbedandthediskwithapneumaticcylinder.Theabrasivesizedecreasesatdifferentrates,dependingonthepin-diskcombination.Thenormalforceofthepinis200N,andtherotationalspeedofthediskis20rpm.,DevicetestPinondisk,testresult,Granitegravel,particlesize2-10mm,Grainsizeofgravel16-22mmTesttime24hRotationspeed80rpm,r=100mm,Specimen,SimulatetestZyklos-testingmachine,TestmaterialsamplesarerotatedinrockstogetherwithsimilarsizereferenceS355=Q345samplesRelativelifetimecanbethencalculatedandcomparedtoreferenceS355=Q345material,SimulatetestZyklos-testresults,UniaxialCrusher-DevicetestPinondisk,Testequipment,Abrasive,Specimen,Crushesgravelbetweentwosurfaces,crushingforce53kNSpecimenarea1000mmAbrasivegranitegravel,particlesize4-6,3mmAbrasivechangedaftereveryrepeatedcrushingcycleCounterpartundertheabrasivewasRalloyWR6toolsteel,UniaxialCrusher-DevicetestPinondisk,Testresults,HardnessHBW,Weightlossg,Raexwearresistantsteelinconcreteapplications,ApplicationsExperiences,RaexTypicalapplications,Tipperbodies,containersandconcretemixersCrushers,excavatorbuckets,dumpertrucksandlipplatesConveyorsandmasstransportationpipesSilos,feeders,funnelsandscreensBladesformachinesandequipmentWearpartsforagriculturalmachines,RaexHS400steeltubeTypicalapplications,Transportationandhandlingofsemi-fluidsPumpingsystemsforwetconcreteTransportationandhandlingofsludgeanddirtTransportationandhandlingofsand,gravelandrockmaterialsTransportationandhandlingofgrainandotheragriculturalproductsWearingpartsofminingmachineryExcavationanddredgingequipmentWearingpartsforhandlingmachineryfortimberandtimbermaterials,RaexHS400SteeltubeMechanicalpropertiesanddimensionalrange,Dimensions,Typicalmechanicalproperties,*)Nominalsize(DN)isindirectlyrelatedtothephysicalsize(mm)oftheboreoroutsidediameteroftheendconnections(flanges,elbowsetc.),Byagreement,wealsomanufacturecustomer-specificdimensions,1)TheBrinellvaluescorrespondapproximatelytoaVickershardnessof400-450HVandRockwellhardnessof40-45HRC,RaexHS400steeltubeFieldtest,NewtubeswereassembledonthreetrucksonMarch2009.Pipingwasdoneontwodifferentsizeoftubes108x4and133x4TheconcretepumpingcarsareusedinnuclearpowerplantbuildingandthewallthicknessismeasuredultrasonicallyTestresultsonOctober2010(after19months)showedthatestimatedlifetimewillbeatleast40000m3.Meaning1mmwearingGraniteishardmineralandcausesheavywearing!,Raex300andOptim650MC,Distancetraveled,m,Wearrate,mm3/m,650MC,Oldmaterial,S355=Q345,Raex300,ConcretemixerrotatingdrumFieldtest,Quarry,LOADINGANDHAULING,SCREENING,CRUSHING,CONVEYING,DIGGING,Cementmakingprocess-Raex,Roadbuildingcycle,Conclusions,Ruukkiisproducinghighqualitywearresistants