(Fe) surfacetreatment---drawingofwire rod(mattresswiresavailablethismethod)
Patentedspringwires:inthemiddleofwiresizes, orcold-drawnspecleadhardeningandsurfacetreatmentanddrawing.
Galvanizedspringsteel fil fè: usuallyhot-plonje, galvanizingorplatingfinishedsize, drawnaftergalvanizingtotherequiredsize alsousewirepicklinghot frèt.
Fil fè Oilhardenedspringsteel: fe bemadeofcarbonsteeloralloy sou-demandcan, surfacetreatmentsandquenchedandtemperedaftercolddrawingtoafinishedsize, sa a kindoftechnologyinautomotivesuspensioncoil springandvalvespringsteel wirewithmoreordinarySprings, men wi, canalsobeused.
Surfacetreatment:commonlyusedpicklingandphosphorization, removalofironoxidetoformphosphatecoating, thereare afewmechanicalapproach. Aimwastomeettherequirementsofcold-drawnwire-drawingprocess, smoothsurfaceisobtained. Springsteel wireforhighfatiguelife, yon fil fè asvalvespringsteel, fil en rodherein, reducingsurfacedefectsonsteelbilletgrinding, alsohelpreducedefects.
Desen: finishedpullingthreaddrawingprocesshasagreatinfluenceontheproductproperties, generallyuselarger total de zòn sou zafè pou diminye de 90% (seeareareductionrate) andlowpassareareduction (10% - 20%), inordertoensurethetoughnessof theproduct. Forhigh strengthspringsteel fil, drawingforthecontrolofexportsofsteeltemperaturebelow150 ° c, preventingwirereverseduetostrainagingcrack, whichisamajorflawofsteelscrap. Pou sa a poutèt, drawingagoodlubricationisrequiredandsufficientcooling, smalllaneareareductionanddrawingspeedhelpsreducethewireand, #39, stemperaturerise.
Chofe tretman: carbonsteelSpringwireleadhardeningprocess, ou cangetveryfinePearlite (sorbite) fortheimprovementofdeepdrawingandspringpropertiesareuseful, patentingofthealternativeprocessoffluidized-bedis notextended, onlyinsmalldiameterapplication. Alloysteel wireannealingheat treatmentisgenerallyusedtomakedrawingdeformationmicrostructureadapted. Steelwireheat en treatmentsolutiontreatment, thepurposeof, whichistoimprovetheOrganizationtomeettheneedsofdrawing.Oilquenchingprocessusedonthewireusinginductionheatingorgas,fuel oilfurnace, heatingthewiretotheaustenitizingtemperatureinsulationfor parfois, anothermedium-temperaturetemperingafterhardening. Althoughnominallycalledoil, basicallybywaterquenchingoraddpolymerwaterquenching.
