Q: Puas muaj cov kev cai dav dav hauv kev lag luam hais txog cov ntsiab lus carbon ntawm substrate rau galvanized coils?
A: Yog. Muaj feem ntau meej cov lej txwv ntawm cov ntsiab lus carbon ntawm lub substrate rau galvanized coils kom tau raws li qhov yuav tsum tau muaj ntawm cov txheej txheem kub -dip galvanizing. Kev pom zoo ntawm kev lag luam qhia tias cov substrates haum rau kub-dip galvanizing feem ntau qis- cov pa roj carbon steel phaj nrog cov ntsiab lus carbon ntawm 0.05% thiab 0.15%. Qhov no yog los tswj qhov kev siv ntawm cov hlau-zinc cov tshuaj tiv thaiv, kom ntseeg tau qhov adhesion thiab nto zoo ntawm txheej. Lwm qhov kev lag luam ntau tshaj qhov txwv yog tias cov ntsiab lus carbon ntawm substrate feem ntau tsis tshaj 0.12%. Noj cov qib DX51D raws li piv txwv, cov ntsiab lus carbon yuav tsum tau rau nws cov substrate tsis ntau tshaj 0.12%. Qhov no yog lub hauv paus txheej txheem rau cov hlau siv hauv galvanized coils.
2. Puas yog cov ntsiab lus ntawm cov pa roj carbon monoxide galvanized coils siv rau lub hom phiaj sib txawv kiag li?
A: Tsis yog kiag li. Cov ntsiab lus ntawm cov pa roj carbon monoxide yog qhov tseem ceeb qhia qhov txawv ntawm cov qib sib txawv ntawm cov ntawv hlau galvanized. Nyob ntawm kev ua tau zoo thiab kev xav tau ntawm lub zog, qhov kev tso cai sib txawv ntau heev. Tshwj xeeb, nws tuaj yeem muab faib ua peb pawg hauv qab no:
Ordinary forming thiab structural steel: Qhov no yog hom ntau tshaj plaws. Cov khoom siv hauv paus feem ntau yog qis qis- carbon steel, thiab nws cov ntsiab lus carbon feem ntau yog tswj los ntawm 0.10% thiab 0.20%. Piv txwv li, S320GD + Z qib steel los xij siv rau cov khoom siv dav dav xav kom cov ntsiab lus carbon ntawm cov khoom siv hauv paus tswj tau qis dua 0.20%.
Ntau yam stamping thiab sib sib zog nqus- kos duab steels: Yuav kom tau txais kev sib sib zog nqus zoo dua- kos duab, cov ntsiab lus carbon ntawm cov ntawv hlau no yuav tsum muaj tsawg li tsawg tau. Piv txwv li, cov ntsiab lus carbon ntawm DC04E + Z electro-galvanized ntawv, haum rau stamping complex duab xws li lub cev panels, yog capped ntawm 0.08%; thaum cov ntsiab lus carbon ntawm interstitial IF steel siv rau ultra- kos duab tob yog nruj me ntsis txwv rau qis dua 0.005%, txawm tias qis li 0.001%-0.005%.
High-lub zog steel qauv: Hom hlau no txhim kho nws lub zog los ntawm microalloying thiab tswj dov thiab txias thev naus laus zis, thiab nws cov ntsiab lus carbon zoo ib yam li cov qauv hlau zoo tib yam. Piv txwv li, qhov siab tshaj plaws carbon cov ntsiab lus ntawm lub substrate nyob rau hauv siab -strength structural G550 qib galvanized ntawv raws li ASTM A653 yog 0.15%. Qhov siab tshaj plaws carbon cov ntsiab lus ntawm substrate nyob rau hauv ib co tshwj xeeb siab - lub zog steels txawm mus txog 0.18%, tab sis cov txheej txheem tshwj xeeb yuav tsum tau ua kom zoo galvanizing.
3. Vim li cas nws tseem ceeb heev rau kev tswj xyuas cov ntsiab lus carbon ntawm cov substrate hauv galvanized coils? Dab tsi cuam tshuam cov ntsiab lus carbon muaj nyob rau hauv cov txheej txheem galvanizing thiab qhov kawg zoo?
A: Kev tswj hwm cov ntsiab lus ntawm cov pa roj carbon monoxide yog qhov tseem ceeb kom tau txais cov txheej txheem siab - zoo, muaj zog. Thaum kub-dip galvanizing, hlau nyob rau hauv substrate reacts nrog cov zinc molten los ua ib tug hlau-zinc alloy txheej. Raws li cov ntsiab lus carbon nyob rau hauv substrate nce, cov tshuaj tiv thaiv no yuav ua rau muaj zog.
Cov tshuaj tiv thaiv hnyav no ua rau muaj teeb meem ntau: Ua ntej, hlau poob nce ntau, cov ntaub ntawv pov tseg thiab tsim cov zinc ntau dua hauv cov zinc molten, cuam tshuam rau kev ruaj khov. Thib ob, cov tshuaj tiv thaiv ntau dhau ua rau cov hlau tsim-zinc alloy txheej los ua tuab tuab. Cov txheej txheej no yog ib qho nyuaj thiab nkig, txo cov plasticity thiab adhesion ntawm txheej. Thaum lub sij hawm tom qab stamping thiab dabtsi yog khoov txheej txheem, cov tuab thiab nkig txheej yog feem ntau tawg los yog tev. Tsis tas li ntawd, cov ntsiab lus siab ntawm cov pa roj carbon monoxide tuaj yeem ua rau cov nyhuv cementite, qhov twg cov pa roj carbon khaws cia ntawm cov hlau nto thaum lub sij hawm annealing, tsim cementite. Qhov no txo cov peev txheej ntub dej ntawm cov zinc molten ntawm cov hlau, ua rau tsis tiav plating lossis zinc nodules.
4. Dhau li ntawm cov ntsiab lus carbon, puas daim ntawv ntawm cov pa roj carbon monoxide hauv substrate tseem cuam tshuam rau qhov zoo ntawm galvanizing?
A: Yog, daim ntawv ntawm cov pa roj carbon steel yog qhov tseem ceeb sib npaug. Cov pa roj carbon nyob rau hauv cov hlau feem ntau muaj nyob rau hauv daim ntawv ntawm hlau- cov pa roj carbon compounds, thiab cov microstructures sib txawv muaj qhov sib txawv ntawm cov hlau -zinc cov tshuaj tiv thaiv tus nqi.
Cov txiaj ntsig kev sim qhia tau hais tias thaum carbon muaj nyob rau hauv daim ntawv ntawm granular pearlite los yog txheej pearlite, cov hlau yaj sai tshaj plaws nyob rau hauv zinc da dej, ua rau ib qho txawv txav ntawm cov hlau tsis muaj zog-zinc cov tshuaj tiv thaiv thiab tsim cov txheej tuab tuab heev. Piv txwv li, yog tias carbon muaj nyob rau hauv ib tug uniformly dispersed sorbite los yog troostite qauv, cov tshuaj tiv thaiv yuav ntau npaum li cas, uas ua rau ib tug nyias txheej txheej nrog adhesion zoo dua. Qhov tseeb no qhia tau hais tias rau cov hlau uas muaj cov ntsiab lus zoo sib xws, cov txheej txheem kev kho cua sov sib txawv tuaj yeem ua rau kev coj tus cwj pwm sib txawv ntawm galvanizing; Yog li ntawd, tus thawj microstructure ntawm lub substrate kuj yog ib qho tseem ceeb los xav txog.
5. Yuav ua li cas daws cov teeb meem ntawm galvanizing siab -carbon substrates hauv kev tsim khoom tiag?
A: Hauv kev tsim khoom, cov kev ua kom zoo hauv qab no, xws li ua ntej-plating, feem ntau yog siv los daws cov teeb meem no:
Ua ntej-plating/Nickel Pre-plating: Qhov no yog ib txoj hauv kev zoo tshaj los daws cov teeb meem galvanizing ntawm siab -silicon, siab- carbon steel. Ua ntej steel sawb nkag mus rau hauv zinc da dej, ib txheej nyias ntawm nickel (los yog lwm yam hlau txheej) yog electroplated. Cov txheej npib tsib xee no tiv thaiv kev sib cuag ncaj qha ntawm cov hlau substrate thiab zinc molten, ua rau qeeb tus nqi thiab kev siv ntawm cov hlau -zinc cov tshuaj tiv thaiv, yog li tau txais ib txheej nyias nrog adhesion zoo. Hauv kev tsim khoom tiag tiag, qhov no tuaj yeem ua tiav los ntawm kev ntxiv kwv yees li 0.05% nickel rau zinc da dej.
Optimized Annealing Txheej Txheem: Los ntawm kev tswj cov huab cua thiab qhov kub thiab txias hauv qhov cub annealing, cov pa roj carbon suaj kaum ntawm cov hlau saum npoo tuaj yeem tiv thaiv tau, txhim kho qhov ntub dej ntawm zinc da dej thiab txo qhov tsis xws luag xws li zinc nodules.
Kev Tswjhwm Zoo ntawm Zinc Bath Kub thiab Cov Txheej Txheem: Txo cov zinc da dej kub thiab nruj tswj hwm cov ntsiab lus txhuas hauv zinc da dej tuaj yeem txhim kho kev loj hlob kinetics ntawm cov hlau -zinc alloy txheej thiab inhibit nws cov thickening ntau dhau.