Surfacetreatment (baja)---drawingofwire rod(mattresswiresavailablethismethod)
Patentedspringwires:inthemiddleofwiresizes, orcold-drawnspecleadhardeningandsurfacetreatmentanddrawing.
Galvanizedspringsteel kawat: usuallyhot-mencelupkan galvanizingorplatingfinishedsize, alsousewirepicklinghot-dingin-drawnaftergalvanizingtotherequiredsize.
Oilhardenedspringsteel kawat: pada demandcan bemadeofcarbonsteeloralloy steel, surfacetreatmentsandquenchedandtemperedaftercolddrawingtoafinishedsize, ini kindoftechnologyinautomotivesuspensioncoil springandvalvespringsteel wirewithmoreordinarySprings, tentu saja, canalsobeused.
Surfacetreatment:commonlyusedpicklingandphosphorization, removalofironoxidetoformphosphatecoating; thereare afewmechanicalapproach. Aimwastomeettherequirementsofcold-drawnwire-drawingprocess, smoothsurfaceisobtained. Springsteel wireforhighfatiguelife, seperti asvalvespringsteel kawat, rodherein kawat baja, reducingsurfacedefectsonsteelbilletgrinding, alsohelpreducedefects.
Gambar: finishedpullingthreaddrawingprocesshasagreatinfluenceontheproductproperties, generallyuselarger total luas pengurangan sekitar 90% (seeareareductionrate) andlowpassareareduction (10% - 20%), inordertoensurethetoughnessof produk. Forhigh strengthspringsteel kawat, drawingforthecontrolofexportsofsteeltemperaturebelow150 ° c, preventingwirereverseduetostrainagingcrack, whichisamajorflawofsteelscrap. Untuk alasan ini, drawingagoodlubricationisrequiredandsufficientcooling, smalllaneareareductionanddrawingspeedhelpsreducethewireand #39; stemperaturerise.
Panas pengobatan: carbonsteelSpringwireleadhardeningprocess, fortheimprovementofdeepdrawingandspringpropertiesareuseful cangetveryfinePearlite (sorbite), patentingofthealternativeprocessoffluidized-bedis notextended, onlyinsmalldiameterapplication. Alloysteel wireannealingheat treatmentisgenerallyusedtomakedrawingdeformationmicrostructureadapted. Stainless steelwireheat treatmentsolutiontreatment, thepurposeof whichistoimprovetheOrganizationtomeettheneedsofdrawing.Oilquenchingprocessusedonthewireusinginductionheatingorgas,fuel oilfurnace, heatingthewiretotheaustenitizingtemperatureinsulationfor kadang-kadang, anothermedium-temperaturetemperingafterhardening. Althoughnominallycalledoil, basicallybywaterquenchingoraddpolymerwaterquenching.
