(Stål) ytbehandlad---drawingofwire rod(mattresswiresavailablethismethod)
Patentedspringwires:inthemiddleofwiresizes, orcold-drawnspecleadhardeningandsurfacetreatmentanddrawing.
Galvanizedspringsteel tråd: usuallyhot-doppa galvanizingorplatingfinishedsize, alsousewirepicklinghot-kall-drawnaftergalvanizingtotherequiredsize.
Oilhardenedspringsteel tråd: på-demandcan bemadeofcarbonsteeloralloy stål, surfacetreatmentsandquenchedandtemperedaftercolddrawingtoafinishedsize, denna kindoftechnologyinautomotivesuspensioncoil springandvalvespringsteel wirewithmoreordinarySprings, naturligtvis, canalsobeused.
Surfacetreatment:commonlyusedpicklingandphosphorization, removalofironoxidetoformphosphatecoating, thereare afewmechanicalapproach. Aimwastomeettherequirementsofcold-drawnwire-drawingprocess, smoothsurfaceisobtained. Fjädrande wireforhighfatiguelife, sådan asvalvespringsteel tråd, ståltråd rodherein, reducingsurfacedefectsonsteelbilletgrinding, alsohelpreducedefects.
Ritning: finishedpullingthreaddrawingprocesshasagreatinfluenceontheproductproperties, generallyuselarger totala areal minskning av ca 90% (seeareareductionrate) andlowpassareareduction (10% - 20%), inordertoensurethetoughnessof theproduct. Forhigh strengthspringsteel tråd, drawingforthecontrolofexportsofsteeltemperaturebelow150 ° c, preventingwirereverseduetostrainagingcrack, whichisamajorflawofsteelscrap. För detta resonera, drawingagoodlubricationisrequiredandsufficientcooling, smalllaneareareductionanddrawingspeedhelpsreducethewireand #39; stemperaturerise.
Värme behandling: carbonsteelSpringwireleadhardeningprocess, du cangetveryfinePearlite (sorbite) fortheimprovementofdeepdrawingandspringpropertiesareuseful, patentingofthealternativeprocessoffluidized-bedis notextended, onlyinsmalldiameterapplication. Alloysteel wireannealingheat treatmentisgenerallyusedtomakedrawingdeformationmicrostructureadapted. Rostfritt steelwireheat treatmentsolutiontreatment, thepurposeof whichistoimprovetheOrganizationtomeettheneedsofdrawing.Oilquenchingprocessusedonthewireusinginductionheatingorgas,fuel oilfurnace, heatingthewiretotheaustenitizingtemperatureinsulationfor någon gång, anothermedium-temperaturetemperingafterhardening. Althoughnominallycalledoil, basicallybywaterquenchingoraddpolymerwaterquenching.
