Surfacetreatment (acciaio)---drawingofwire rod(mattresswiresavailablethismethod)
Patentedspringwires:inthemiddleofwiresizes, orcold-drawnspecleadhardeningandsurfacetreatmentanddrawing.
Galvanizedspringsteel filo: usuallyhot-tuffo galvanizingorplatingfinishedsize, alsousewirepicklinghot-freddo-drawnaftergalvanizingtotherequiredsize.
Oilhardenedspringsteel filo: acciaio bemadeofcarbonsteeloralloy su-demandcan, surfacetreatmentsandquenchedandtemperedaftercolddrawingtoafinishedsize, questo wirewithmoreordinarySprings di springandvalvespringsteel kindoftechnologyinautomotivesuspensioncoil, naturalmente, canalsobeused.
Surfacetreatment:commonlyusedpicklingandphosphorization, removalofironoxidetoformphosphatecoating; ci sono afewmechanicalapproach. Aimwastomeettherequirementsofcold-drawnwire-drawingprocess, smoothsurfaceisobtained. Passione wireforhighfatiguelife, tali asvalvespringsteel filo, filo di acciaio rodherein, reducingsurfacedefectsonsteelbilletgrinding, alsohelpreducedefects.
Disegno: finishedpullingthreaddrawingprocesshasagreatinfluenceontheproductproperties, generallyuselarger riduzione della superficie totale di circa il 90% (seeareareductionrate) andlowpassareareduction (10% - 20%), inordertoensurethetoughnessof theproduct. Sinonimo strengthspringsteel filo, drawingforthecontrolofexportsofsteeltemperaturebelow150 ° c, preventingwirereverseduetostrainagingcrack, whichisamajorflawofsteelscrap. Per questo motivo, drawingagoodlubricationisrequiredandsufficientcooling, smalllaneareareductionanddrawingspeedhelpsreducethewireand #39; stemperaturerise.
Trattamento: carbonsteelSpringwireleadhardeningprocess, si cangetveryfinePearlite (sorbite) fortheimprovementofdeepdrawingandspringpropertiesareuseful, notextended patentingofthealternativeprocessoffluidized-bedis, onlyinsmalldiameterapplication di calore. AlloySteel wireannealingheat treatmentisgenerallyusedtomakedrawingdeformationmicrostructureadapted. Inox steelwireheat treatmentsolutiontreatment, thepurposeof whichistoimprovetheOrganizationtomeettheneedsofdrawing.Oilquenchingprocessusedonthewireusinginductionheatingorgas,fuel oilfurnace, heatingthewiretotheaustenitizingtemperatureinsulationfor, qualche volta, anothermedium-temperaturetemperingafterhardening. Althoughnominallycalledoil, basicallybywaterquenchingoraddpolymerwaterquenching.
