Dab tsi yog Spheroidizing Annealing
Spheroidizing annealing yog kev kho cua sov siv los ua kom cov hlau, tshwj xeeb tshaj yog cov pa roj carbon ntau thiab cov hlau alloy, kom nws tuaj yeem ua tshuab, txias tsim lossis ua tiav ntxiv. Thaum kho, cov cementite platelets nyob rau hauv pearlite tawg thiab loj hlob mus rau hauv me me spherical hais dispersed nyob rau hauv ib tug ferrite matrix. Cov qauv tsim, hu ua spheroidite, yog qhov softest thiab feem ntau ductile mob uas ib tug hlau tuaj yeem ncav cuag ntawm ib qho hardness.
Vim li cas Spheroidizing thiaj xav tau
High carbon steels nyob rau hauv ib txwm dov los yog normalized mob yog ib qho nyuaj thiab abrasive, ua kom ceev cov cuab yeej hnav thiab tsis zoo nto tiav nyob rau hauv machining. Spheroidizing txo cov hardness los ntawm 20 mus rau 30 Rockwell C cov ntsiab lus los yog ntau tshaj thiab txhim kho cov uniformity ntawm cov khoom. Nws kuj tseem rov ua kom cov ductility tom qab ua haujlwm txias kom cov hlau kos duab, stamping thiab khoov tuaj yeem txuas ntxiv yam tsis muaj kev tawg.
Kev kho cua sov Cycle
Cov txheej txheem ua kom sov cov hlau mus rau qhov kub thiab txias qis dua, feem ntau 680 txog 720 degrees Celsius, thiab tuav nws ntev, feem ntau ob peb teev mus rau ntau tshaj ib hnub. Kev ua kom txias qeeb tom qab tuav. Xwb, cov hlau tuaj yeem ua rau saum toj thiab qis dua qhov kub thiab txias kom nrawm carbide spheroidization. Lub voj voog caij nyoog nyob ntawm qhov muaj pes tsawg leeg thiab qhov yuav tsum tau muaj qhov kawg hardness.
Qhov cuam tshuam rau Microstructure
Lub lamellar cementite ntawm pearlite tsis ruaj khov ntawm qhov ntsuas kub thiab maj mam yaj ntawm cov npoo ntawm daim hlau, tso cai rau cov carbide rov faib ua spheroids. Cov txheej txheem diffusion qeeb qeeb, uas yog vim li cas kev kho mob yuav siv sijhawm. Cov spheroidal carbides yog me me nyob rau hauv qhov chaw ntawm ib lub ntim tshaj daim hlau, uas txo cov hardness thiab txhim kho formability.
Cov txiaj ntsig rau kev tsim khoom
Spheroidized steel tshuab sai dua nrog lub neej ntev ntawm lub cuab yeej thiab kev tswj cov nti zoo dua, txiav cov xov huv huv thiab cov ntsiab lus tseem ceeb, thiab lub taub hau txias rau hauv cov fasteners tsis tawg. Cov qauv kuj tseem txhim kho cov lus teb rau cov kev kho mob tom qab hardening vim tias cov pa roj carbon dioxide yaj tsis sib xws. Rau cov laj thawj no, spheroidizing yog cov txheej txheem zeb kho rau cov hlua hlau, sawb thiab bar siv rau hauv lub taub hau txias thiab machining.
Tej kev siv
Cov ntawv thov muaj xws li lub taub hau txias rau bolts thiab screws, carbon steel sawb rau stamping, caij nplooj ntoos hlav steel ua ntej tsim, bearing steel ua ntej machining, thiab cov cuab yeej steel ua ntej shaping. Cov kev kho mob tau teev tseg rau cov hlau uas muaj cov ntsiab lus carbon saum toj no li ntawm 0.4 feem pua thaum kev ua haujlwm hnyav lossis kev ua kom txias.
Cov lus nug nquag
spheroidizing siv sijhawm ntev npaum li cas?Lub voj voog feem ntau kav los ntawm ob peb teev mus rau ntau tshaj ib hnub, nyob ntawm seb cov hlau muaj pes tsawg leeg, ntu loj thiab lub hom phiaj hardness.
Puas yog spheroidizing hloov cov tshuaj muaj pes tsawg leeg?Tsis yog, tsuas yog kev faib tawm ntawm cov carbides hloov; tag nrho cov muaj pes tsawg leeg ntawm cov hlau tseem zoo ib yam.
Cov pa roj carbon tsawg puas tuaj yeem spheroidized?Tsawg carbon steels twb muag thiab tsis xav tau spheroidizing; kev kho mob yog siv rau nruab nrab thiab siab carbon thiab alloy steels.
Yuav ua li cas hardness tiav tom qab spheroidizing?Hardness nyob ntawm muaj pes tsawg leeg tab sis feem ntau ntog nyob rau hauv thaj tsam ntawm 130 mus rau 200 HBW rau nruab nrab carbon steels.
Puas spheroidizing txhim kho machinability ntawm tag nrho cov hlau?Rau siab carbon thiab alloy steels nws feem ntau ua, tab sis rau qee qhov qis alloy steels ib qho kev kho kom zoo tuaj yeem muab kev coj tus cwj pwm zoo dua.
