AnalysisofthecharacteristicsandapplicationcasesofHalnnCBN
processinghigh-speedsteel
Processingcharacteristicsofhigh-speedsteel
Highspeedsteel.GenerallyabbreviatedasHSS,itisatoolsteel withhighhardness,highwearresistanceandhighheatresistance.
ThehardnessisgenerallyHRC65-HRC68;itsmainapplicationisto makemetalprocessingcuttingtools,coldextrusiondiesandCold pierpressmolds,rolls,etc.;Halnnhasaccumulatedalargenumber ofsuccessfulcasesandprocessingexperience.
ProcessingcaseofCBNinserthighspeedsteel
Case1:CBNinsertBN-S20processinghigh-speedsteelrollcase
Processingdifficulties:(1)Highhardness,(2)Largemachining allowance(3)Highgroovingcuttingresistance(4)Partshave
intermittentcuttingimpact,andtheinsertsarepronetochipping.
Processingmaterial:highspeedsteelWorkpiecehardness: HSD90
Selectedinsert:BN-S20RCMX120700
Cuttingparameters:Fr=0.20mm/r,Vc=35m/min,drycutting
Toolmaterial
HalnnBN-S20insertslifeistwiceaslongasotherCBNinserts!
Case2:CBNinsertBN-H10processingpowderhigh-speedsteel case
Difficultyinprocessing:Forapowderhigh-speedsteelmoldwitha hardnessofHRC67-HRC65afterquenchingandheattreatment, usingaCBNinserts,theuppersurfacesufferedsevere delaminationandwearduetohightemperature,andonlyonepiece couldbeprocessed.
HalnnadoptstoolmaterialBN-H10(atoolmaterialgradethatcan withstandmediumintermittentcutting),andthecuttingeffectisvery good.IthasalsochangedittoanR1.6tooltiparc.Onetoolhead
canprocess3-5workpieces,andthecustomerissatisfied.
Case3:SuccessfulcaseofCBNinsertBN-H21processing importedhigh-speedsteel
Machinetool:OKUMAPartsmaterial:Importedhigh-speedsteel (hardnessafterheatingHRC63-65)
Processingdifficulties:1.Intermittentcutting(asshowninthefigure ofthetoothshape,flathead)asshowninFigure2.The dimensionaltoleranceisextremelystrict0.005mm;
ProcessinghardnessHRC65Processingpart:outercircle(strong interruptedcutting)
Selectedinsert:BN-H21CNGA120408
Cuttingparameters:Fr=0.10mm/r,Vc=35~60m/minap=0.15mm, drycutting
Halnnexperiencesummary:
1.Whenprocessingultra-highhardnesspartsandsevereintermittent cuttingconditions,thecuttingspeedshouldnotbetoohigh.
2.Ifthedimensionaltoleranceislessthan0.01,coolingisgenerally required,otherwisethethermalexpansionandcontractionofthesize willbeunstable.BN-H21andBN-H10gradeCBNinsertscanacceptair coolingorevenandsufficientoilycoolant.