1.Yuav ua li cas cov roj tiv thaiv feem ntau yog siv nyob rau hauv cov txheej txheem annealing ntawm txias-rolled coils?
Thaum lub sij hawm annealing, txias-rolled coils feem ntau yog siv cov sib xyaw ntawm hydrogen (H₂) thiab nitrogen (N₂) gases, nrog rau cov hydrogen feem ntau yog li ntawm 5% mus rau 100% (txog 100% nyob rau hauv tag nrho - hydrogen furnace). Hydrogen muaj zog txo cov khoom, zoo tshem tawm cov oxide txheej los ntawm cov sawb nto thiab tiv thaiv oxidation; nitrogen ua haujlwm raws li cov khoom siv roj los tswj cov huab cua thiab txo qhov kev pheej hmoo ntawm kev tawg.
2.Vim li cas cov roj tiv thaiv yuav tsum muaj hydrogen?
Txo cov hlau oxide: Txo cov hlau oxide uas yuav tsim thaum lub sij hawm annealing rau hlau hlau, tsis txhob nto defects.
Kev txhim kho saum npoo zoo: Cov tshuaj tiv thaiv txo qis ua rau cov dej vapor, uas tom qab ntawd raug tshem tawm nrog cov roj ntws, ua kom pom tseeb, oxide-dawb strip nto.
Txhim kho thermal conductivity: Hydrogen muaj ntau dua thermal conductivity tshaj nitrogen, shortening lub voj voog annealing thiab txhim kho efficiency ntau lawm.
3.Yuav ua li cas qhov piv ntawm cov roj tiv thaiv yuav tsum tau kho raws li tus txheej txheem?
Txhua yam - hydrogen furnace (100% H₂): Siv rau cov ntawv thov uas xav tau qhov zoo ntawm qhov chaw (piv txwv li, tsheb sab nrauv vaj huam sib luag), ua kom tau txais kev txo qis thiab ua kom txias sai.
Nitrogen-hydrogen sib tov (H₂ 5%-40%): Siv rau cov hlau sib sib zog nqus zoo tib yam los yog sawb hlau nrog qis dua qhov yuav tsum tau ua, ntsuas kev nyab xeeb thiab nqi.
Ntshiab nitrogen (100% N₂): Siv tsuas yog rau qis- cov txheej txheem kub lossis qib steel tshwj xeeb (piv txwv li, nruab nrab annealing ntawm silicon steel), zam dhau hydrogen permeation.
4.Yuav ua li cas kom muaj kev ruaj ntseg ntawm cov roj tiv thaiv thaum siv?
Kev soj ntsuam nruj airtightness: Lub tshuab hluav taws xob lub cev tau txais cov qauv kaw tag nrho los tiv thaiv huab cua nkag.
Kev tswj huab cua: Oxygen concentration yog saib xyuas hauv lub sijhawm tiag tiag siv lub ntsuas pa oxygen kom ntseeg tau tias nws tseem qis dua qhov kev txwv qis dua (feem ntau<0.5%).
Purge txheej txheem: Ua ntej annealing, huab cua nyob rau hauv lub cub tawg yog tag nrho hloov nrog nitrogen, thiab tom qab annealing, hydrogen yog purged nrog nitrogen kom tsis txhob muaj kev phom sij.
5.Qhov kev tiv thaiv roj muaj txiaj ntsig dab tsi rau qhov kawg ntawm cov khoom txias -rolled coils?
Surface Quality: Tiv thaiv qhov tsis xws luag xws li oxidation thiab pitting, kom ntseeg tau adhesion ntawm cov txheej tom ntej (xws li zinc plating).
Mechanical Properties: Ib qho chaw ntshiab hydrogen tiv thaiv decarburization los yog carburization, kom ruaj khov strip zog thiab sib sib zog nqus- kos duab.
Kev Ua Tau Zoo: Lub siab -hydrogen huab cua ua rau lub voj voog luv luv (piv txwv li, tag nrho -hydrogen cub tawg txuag ntau dua 30% lub zog ntau dua li lub cub tawg), txo cov nqi tsim khoom.