1. Cov qib ntawm lub teb chaws tus qauv galvanized coils (kub-dip galvanized steel ntawv) zoo li cas? Txhua tsab ntawv thiab tus lej hauv tus lej ua piv txwv li cas?
A: Siv cov qib DC51D + Z ntau tshaj plaws ua piv txwv, qib system tau teev tseg hauv lub teb chaws tus qauv GB/T 2518-2019 muaj peb ntu: cov khoom siv hauv paus hom kev txheeb xyuas, tus lej lej, thiab txheej txheej tom qab. Thawj ob tsab ntawv sawv cev rau cov khoom siv hauv paus, qhov twg D qhia txog qhov txias txias (tsim rau stamping thiab dabtsi yog khoov), H qhia cov khoom kub -rolled puag (tsim rau cov khoom siv uas tsis tshua muaj tuab), thiab S qhia cov qauv hlau (tseem ceeb rau lub zog es tsis yog formability). Tsab ntawv thib peb C qhia tias txias- cov khoom siv dov hauv paus (Feem ntau), thaum D sawv cev tshwj xeeb rau kev kub kub-dip galvanizing. Tus lej tsim yog qhov tseem ceeb ntawm qib kev ua tau zoo-51 sawv cev rau qib kev lag luam dav dav (khoov yooj yim), 52 sawv cev rau qib stamping (tsim rau kev stamping), 53 sawv cev rau qib kos duab sib sib zog nqus (tsim rau kev kos duab sib sib zog nqus), thiab 54 thiab siab dua sawv cev rau ultra-tshaj qhov sib sib zog nqus qib (wn{2} qhov chaw). Rau cov qauv hlau, cov lej xws li 220/350/450 qhia qhov tsawg kawg nkaus yield zog tus nqi. Cov lus kawg kawg qhia txog cov txheej txheej: + Z rau cov zinc txheej ntshiab, + ZF rau zinc - hlau alloy txheej, + ZA rau zinc-aluminium alloy txheej, thiab + AZ rau aluminium-zinc alloy txheej.
2. Dab tsi yog qhov sib txawv ntawm qhov tawm los, lub zog tensile, thiab elongation ntawm cov qib sib txawv hauv lub teb chaws tus qauv? Qib twg muaj qhov ua tau zoo tshaj plaws?
A: Cov khoom siv hluav taws xob ntawm lub teb chaws tus qauv qib qhia pom meej gradient faib. Kev lag luam qib DC51D + Z muaj lub zog tawm los tsawg dua lossis sib npaug ntawm 360MPa, lub zog tensile Tsawg dua lossis sib npaug ntawm 440MPa, thiab elongation Ntau dua lossis sib npaug li 20%, haum rau kev khoov yooj yim. Sib piv cov qib ib kauj ruam, peb pom tias DC52D + Z muaj lub zog tawm los uas txo qis li ntawm 100MPa rau Tsawg dua lossis sib npaug rau 260MPa, lub zog tensile uas nqaim mus rau 300-390MPa, thiab elongation uas nce mus rau ntau dua lossis sib npaug rau 28%. DC53D + Z ntxiv cov kev xav tau no, nrog lub zog tawm los tsawg dua lossis sib npaug ntawm 200MPa, tensile lub zog 270-320MPa, thiab elongation Ntau dua lossis sib npaug li 38%, haum rau nruab nrab qhov tob tob. DC54D + Z yog qib zoo rau kev kos duab tob tob, nrog lub zog tawm los tsawg dua lossis sib npaug ntawm 180MPa, lub zog tensile 270-310MPa, thiab elongation Ntau dua lossis sib npaug li 40%, ua rau nws tsim nyog rau qhov sib sib zog nqus sib sib zog nqus. Feem ntau, cov qib nrog qis qis zog thiab elongation ntau dua muab kev ua haujlwm zoo dua thiab ua haujlwm. Rau cov txheej txheem kos duab tob tshaj plaws, DC54D + Z yuav tsum yog qhov kev xaiv zoo tshaj plaws, tab sis cov kev xaiv tshwj xeeb yuav tsum tau ua raws li kev xav tau ntawm cov khoom lag luam geometry complexity, pwm tsim, thiab cov txheej txheem kev kho mob tom ntej.
3. Yuav ua li cas ib tug yuav tsum xaiv cov qib uas tsim nyog los ntawm lub teb chaws standard grade system raws li qhov tseeb ua technology (xws li dabtsi yog khoov, kos duab ntiav, thiab sib sib zog nqus drawing)?
A: Tus yuam sij rau kev xaiv yog sib piv cov qib mus rau qib ntawm kev ua deformation. Yog hais tias cov khoom tsuas yog yooj yim khoov, trimming, los yog yob txoj kev, coj mus muag qib DC51D + Z yog txaus. Qib no yog cov khoom siv siv dav tshaj plaws hauv kev tsim kho thiab kev lag luam teeb pom kev zoo, muab tus nqi zoo tshaj -kev ua tau zoo. Thaum cov khoom yuav tsum tau kos duab ntiav, xws li kev tsim lub cev muaj zog lossis cov discs ntiav -zoo li tus, nws raug nquahu kom siv DC52D + Z stamping qib. Cov qib no tuav cov formability zoo thaum muab kev ua haujlwm siab. Thaum xav tau kev kos duab sib sib zog nqus, xws li kev tsim cov khoom nkhaus zoo li lub tsheb qhov rooj vaj huam sib luag, fenders, tshuab ntxhua khaub ncaws sab hauv, thiab roj tso tsheb hlau luam, DC53D + Z lossis siab dua - specification DC54D + Z sib sib zog nqus nqus qib yuav tsum tau siv. Cov qib no muaj lub zog qis dua rau lub zog tensile piv, txhim kho qhov kev txwv tag nrho. Tsis tas li ntawd, cov qauv steel qib S220GD + Z rau S550GD + Z tshwj xeeb yog siv rau kev thauj khoom-cov kabmob. Cov lej sawv cev rau qhov tsawg kawg nkaus tawm lub zog. Thaum xaiv cov hlau, lub zog yuav tsum tau ua ntawm cov qauv tsim yuav tsum tau ua kom tau raws li qhov tsis yog formability. Piv txwv li, S350GD + Z lossis S450GD + Z tuaj yeem nyiam rau kev tsim cov khoom siv raws li qhov yuav tsum tau ua.
4. Muab piv rau tus qauv qub (GB/T 2518-2008), Dab tsi hloov tau tshwm sim hauv cov txheej txheem ntawm tus qauv tshiab GB/T 2518-2019? Cov neeg siv yuav tsum xyuam xim rau dab tsi thaum xaiv cov qhab nia?
A: GB/T 2518-2019 yog qhov txawv ntawm GB/T 2518-2008 thiab tau hloov pauv ob qho GB/T 2518-2008 thiab GB/T 14978-2008 tus qauv. Nws ua ke plaub hom txheej: zinc-hlau alloy (ZF), zinc-aluminium alloy (ZA), thiab aluminium-zinc alloy (AZ), muab ntau yam dav. Hauv cov txheej txheem tshiab, nws raug nquahu kom siv DC-theem qib rau kev xaiv sib piv, raws li qib SGCC (raws li qib galvanized ntawv hauv thawj lub tebchaws tus qauv) muaj ntau dua nyob rau hauv cov qauv qub. SGCC roughly sib raug rau DC51D + Z, SGCD1 rau DC52D + Z, SGCD2 rau DC53D + Z, thiab SGCD3 rau DC54D + Z. Thaum xaiv ib yam khoom, cov neeg siv yuav tsum tau them nyiaj tshwj xeeb rau cov hauv qab no: Tus qauv tshiab tau hloov kho cov kev xav tau rau lub zog tawm los thiab lub zog tensile. Cov khoom siv kho tshuab ntawm qee qib tau ua kom zoo dua qub piv rau cov qauv qub. Nws kuj ua rau cov kev cai nruj dua rau qhov elongation ntawm cov qauv transverse dhau ntawm qhov kev taw qhia dov. Thaum kev txiav txim, nws yuav tsum tau qhia meej tias GB / T 2518-2019 tau raug coj los ua kom tsis txhob muaj cov khoom siv tsis tau raws li qhov xav tau zoo thaum xa khoom vim yog siv tsis raug rau tus qauv qauv.
5. Yuav ua li cas los sib piv thiab xaiv cov qib tsim nyog ntawm galvanized coil nrog cov qauv thoob ntiaj teb xws li Japanese JIS thiab European EN?
A: Suav cov qauv qib thiab qib siab thoob ntiaj teb cov qauv muaj kev sib raug zoo hauv cov khoom siv tshuab, thiab kev xaiv sib npaug tuaj yeem ua los ntawm kev xa mus rau kev sib piv kev sib raug zoo. Suav tus qauv DC51D + Z yog qhov sib npaug ntawm Japanese JIS G3302 tus qauv SGCC, ob qho tib si rau qib lag luam dav dav; DC52D + Z yog sib npaug rau SGCD1, haum rau stamping; DC53D + Z yog sib npaug rau SGCD2, haum rau kev kos duab sib sib zog nqus; DC54D + Z yog sib npaug rau SGCD3, haum rau ultra- kos duab tob. Los ntawm thoob ntiaj teb lees paub European tus qauv EN 10346, cov ntawv ua ntej DX (tsis yog DC hauv Suav tus qauv) hauv DX51D, DX52D, thiab DX53D sib haum rau tib theem kev ua haujlwm. Piv txwv li, DX51D + Z yog qhov tseem ceeb sib npaug rau DC51D + Z. Hais txog cov qauv hlau, JIS G3302 SGHC series (kub-kub{26}}rolled base steel nrog kub-dip galvanization) muaj cov kev xav tau zoo sib xws rau lub teb chaws tus qauv S series structural steel, tab sis cov qauv xa khoom txawv. Thaum xaiv cov hlau hla cov qauv, nws raug nquahu kom siv cov khoom siv kho tshuab (yield zog, tensile zog, elongation) raws li cov ntsuas ntsuas nruj, txheeb xyuas cov qib kam rau ua thiab zinc txheej hom ib los ntawm ib qho, thiab tom qab ntawd ua tib zoo phim lawv. Yog tias yuav tsum tau xa tawm lossis xa mus rau cov tuam txhab txawv teb chaws, feem ntau cov qauv hauv tebchaws tuaj yeem ua tau raws li qhov yuav tsum tau ua; tsuas yog tus qauv ntawm qhov kev lees paub yuav tsum tau hloov kho.