1.What yog cov kev ua qias tuaj thiab cov phom sij rau ntawm lub txias txias {{1} {dov steel?
Cov roj tsis huv: qhov no feem ntau yog los ntawm cov roj rolling (siv rau cov roj av thiab lwm yam) thaum lub sij hawm cov roj hmab, khoom siv roj nplua nyeem, lossis cov roj tsis zoo los ntawm annealing. Yog tias tsis tshem tawm, qhov no tuaj yeem ua rau cov khoom tsis zoo ntawm cov xim tsis zoo ntawm cov xim sib xyaw (npuas thiab ua kom tawg thiab ua kom haum siv thiab ua haujlwm ua haujlwm thaum lub thwj.
Roj Nplig / xeb: Feem ntau tshwm sim tom qab tsis yog}}} Cov txheej txheem oxide uas tsis muaj huab cua zoo li ntawm cov khoom siv pa roj av xws li ua ke los ntawm kev khaws cia ntawm qhov chaw) lossis cov xeb me tshwm sim los ntawm kev cia. Oxide nplai tuaj yeem roughen saum npoo av, ua rau cov kev pab tsis sib haum thiab kev ua rau ntawm flaking thiab khawb cov ntawv thaum ua.
Cov impurities: Cov no suav nrog cov hmoov hlau thiab hlau khib nyiab sab laug ntawm cov xaim, nrog rau plua plav los ntawm kev khaws / tsheb thauj mus los. Cov impurities no tuaj yeem ua rau pinholes thiab ua pob rau ntawm coated nto, lossis puas cov ntawv puas thaum lub sijhawm stamping. Pickling nyob ntawm: Yog hais tias rinse tom qab pickling yog tsis meej, acid (xws li fecrochloric acid) lossis cov ntsev (xws li cov kab xeb ntawm cov phaj (thaj av daj thiab xeb).
2.What yog cov siv tshuaj lom neeg cov tshuaj lom neeg thiab lawv cov xwm txheej muaj feem xyuam?
Alkaline cov tshuaj txhuam muaj cov sodium hydroxide, sodium carbonate, sodium silicate, thiab surfactants (xws li sodium alkylenzene sulfonate). Lawv tshem cov roj stains los ntawm alkaline hydrolysis (roj ntim soluble soaps hauv cov ntawv nplaum rau cov khoom ntim, ua rau cov roj me me tshem tawm hauv dej). Lawv tsim nyog rau cov ntxhia roj stains xws li Rolling roj thiab lubricating roj thiab lubricating roj, thiab yog cov tshuaj me me rau cov ntawv (alkaline recentred kom tsis txhob muaj corrosion ntau).
Acidic cleaners primarily use hydrochloric acid, sulfuric acid (at low concentrations), or citric acid (an organic acid). They are effective against mill scale and rust stains. The acid reacts with the mill scale to form soluble salts (such as FeCl₂ and FeSO₄), which are removed with the solution. Acid cleaning is often combined with alkaline cleaning (first using acid to remove scale, then alkaline to remove oil). However, it's important to note that cold-rolled steel is mostly low-carbon steel. Excessive acid concentrations (e.g., hydrochloric acid concentrations > 20%) or high temperatures (>60 degree) tuaj yeem corrode lub substrate, ua rau nyob rau hauv nplaim roughness. (Corrosion inhibitors, xws li hexamine, yog yuav tsum tau txo tus nqi corrosion.)
Nruab nrab tu cov neeg sawv cev, feem ntau yog raws li surfactants (xws li cov tsis muaj kwv yees li 7 thiab tshem cov roj teeb thiab plua plav los ntawm emulsification thiab nkag mus. Lawv haum rau txias- rolled steel yuav tsum tau ua tiav heev (xws li cov uas siv nyob rau hauv cov seev cev), zam cov kua qaub thiab alkali corrosion.
3.Qhov dab tsi yog cov txheej txheem kev tu ua kom huv yog li cas?
Kev nkag siab: txias {- Daim ntawv sau cia (lossis siv cov tshuaj tiv thaiv kom nrawm) Haum rau me me batches ntawm cov ntawv qhia ua qauv zoo xws li cov ntawv, cov qauv no yuav tsum muaj cov khoom siv yooj yim tab sis tsis muaj peev xwm siv tau yooj yim.
Txau: Lub siab - siab txau cov tshuaj lom neeg, siv ob qho kev cuam tshuam yuam kev thiab tshuaj lom neeg kom tshem tawm cov khoom tsis huv. Haum rau cov kab ntau lawm (xws li txias-dov-dov daim ntawv xov) tiav kev ua tiav (nrawm txog li 10-30 m / min) thiab tuaj yeem ua ke nrog cov khoom siv cov txiaj ntsig.
4.What yog cov kev sib hloov ntawm kev ntxuav lub cev?
Cov menyuam Txhuam Hniav Txhuam Hniav: Txhuam cov tub luam (ua los ntawm nylon lossis xaiv raws cov npoo ua kom tiav ntawm daim phiaj nthab) yog ntsia rau ntawm kab ntxuav. Raws li lub phaj dhau mus, cov txhuam hniav rollers tig (ntawm qhov ceev ntawm 100 {{}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}} Cov hmoov av kom tshem tawm cov hmoov hlau, plua plav, thiab roj emulsified, thiab emulsified roj. Txhuam siab yuav tsum tau tswj (feem ntau 0.1-0.3 mpa). Ntau dhau siab siab tuaj yeem khawb daim phaj saum npoo (tshwj xeeb tshaj yog ci cauj-rolled phaj).
High - pa dej yaug: siab -}}}}}}}}) yog txau mus rau lub phaj. Qhov no feem ntau siv kom tshem cov tshuaj seem (xws li cov kua qaub tom qab pickling thiab alkali tom qab ntxuav tawm) thiab paug xoob los ntawm cov tshuaj lom neeg. Cov dej kub (chav sov lossis 40 {}} 50℃rau kev ua kom zoo nkauj (ntawm ib lub phaj ntws mus rau lub phaj kom tiv thaiv rov qab thiab cov khoom paug theem nrab) yuav tsum tau tswj hwm. Kev tu kom huv nrho: ultrasonic vuam (20-40KHz zaus) tau qhia rau hauv lub tank tu, tsim ntau lub npuas me me hauv cov kua. Thaum cov npuas no tawg, lawv tsim kom muaj kev kub ntxhov, cuam tshuam cov roj ntsha hauv cov nplais (xws li cov roj stains thiab hlau hmoov av hauv nqaim. Hom no yog tsim nyog rau precision txias phaj (xws li cov uas siv hauv cov khoom siv hluav taws xob (kev tshem tawm txawm tias micron loj loj).
5.Txhua tus yuam sij ntawm txoj kev tu huv si li cas?
Kev siv tshuaj lom neeg muaj cov tshuaj tua neeg: Alkaline Kev Tu cov tshuaj tiv thaiv feem ntau muaj kev xav tau ntawm 2-5% (ntau dua cov peev xwm yooj yim tuaj yeem ua rau muaj lub zog huv tsis txaus); Acidic Tu cov neeg sawv cev (hydrochloric acid) muaj kev sib haum xeeb ntawm 5-15% (siv cov tshuaj corrosion los ua kom cov corrosion tus nqi qis dua 0.1g / milming.
Qhov kub thiab txias: Ntau dua sim ua kom muaj cov tshuaj tiv thaiv kev ntxuav (piv txwv li kub siab dua 80%
Lub sijhawm tu: Kev tu huv si yuav tsum tau ib txoj kab nrawm ntawm 10-}} 30m / min (kho nyob ntawm qhov tuab ntawm lub qhov paug). Lub sijhawm luv luv yuav ua rau kev ntxuav tsis tiav, thaum ntev dhau lub sijhawm yuav ua rau xeb ntau dhau ntawm lub vaj huam sib luag ntawm lub vaj huam sib luag. Neeg kho tshuab zog: Txhuam cov menyuam cov menyuam siab 0.1-0.3Mpa, siv qis dua cov kab laug sab kom tsis txhob khawb; siv ntau dua rau cov laug cam kom ua kom muaj cov nyhuv ntxhoo).