Dab tsi yog qhov zoo thiab tsis zoo ntawm Q345 steel piv rau lwm yam qis- {2} {}} lub zog steels?
Q345 hlau yog ib qho ntawm cov qhab nia theem siab tshaj plaws ntawm qis qis {{1} {{{2} {{luas {2} {{luas- lub zog hlau (HSLA hlau) hauv kuv lub teb chaws. Nws qhov kev ua tau zoo tso, raug nqi, thiab cov nqi sib xyaw txiav txim siab tau zoo dua lwm yam qis {} {}- lub zog applications. Cov hauv qab no yog cov ncauj lus kom ntxaws ntawm nws cov txiaj ntsig thiab qhov tsis zoo, sib xyaw ua ke nrog cov xwm txheej sib piv (Categorized los ntawm kev sib piv qib graphis):
1. Q345 steel cov ntsiab lus zoo: ntsuas "ua tau zoo" kev ua tau zoo, nqi, thiab txheej txheem "los ua kom tau raws li cov kev xav tau nrov
Q345 qhov zoo tseem ceeb nyob rau hauv nws "Cov Qauv Kev Ua Haujlwm Zoo + Tus nqi qis dua + Tus txheej txheem qis tshaj plaws." Tshwj xeeb tshaj yog nyob rau hauv qis {{}} {{{5} {}}} lub zog qis {}} cov hlau almoy. Qhov no yog xav hauv peb qhov tseem ceeb:
1. Cost Advantage: Lower raw material and manufacturing costs, resulting in an outstanding cost-performance ratio.
Lub siab dua lub zog ntawm tsawg -} ecoy high-}}} econing thiab ti, thiab tempering), ua rau muaj nqi siab dua. Piv rau Q460 / Q690: Q345 muaj cov ntsiab lus qis dua (piv txwv li cov ntsiab lus NB / V / T345 yog kub}}} rolled lossis tswj-dov). Nws cov khoom siv nyoos yog kwv yees li 15% -25% qis dua Q460 thiab 30% -40% qis dua Q690.
Piv rau Q235 (tib yam cov hlau ua haujlwm): Thaum Q345 yog qhov ntau dua li 47% muaj peev xwm (xws li cov kab teeb ci thiab cov tsheb thauj khoom sib tw tuaj yeem txo tus nqi ntawm cov qauv, ua rau muaj kev thauj ntau dua:
Cov txheej txheem - zaj phooj ywg ntawm tsawg-} {{{{2} sib npaug ntawm nws cov pa roj carbon monoxe (CEQ) thiab ua haujlwm txias kom tawv. Q345 Cov kev txawj ntse hauv ob qho no:
Good Weldability: Q345 muaj cov pa roj carbon sib npaug ntawm 0.42% {}} 0.47% ({{{{{weld steel. " Preheating tsis tseem ceeb lossis yuav tsum tsuas yog tsawg-kub preheating (piv txwv li, tsis muaj kev ua ntej yog qhov yuav tsum tau ua rau cov hlau tuab ≤10mm). Cov ntaub hlau uas muaj pa (xws li Er50-6 Vuam hlau thiab E5015 Vuam Qws) tau muaj nuj nqis rau kev tswj hwm qhov kub tshwj xeeb, xws li Q690).
Cov qauv muaj txiaj ntsig zoo: Q345 muaj elongation ntawm ≥21% (≥19% rau cov phiaj tuab) thiab cov khaub ncaws tuab tus txheej txheem, pob tw, thiab coiling. Piv txwv li, kev khoov ntawm cov nqaj hlau (khoov li hluav taws xob ≥ 2 {}}} phaj tuab) thiab cov kav hlau thiab vuam hlau los yog annealing. Txawm li cas los xij, siab - lub zog steels xws li Q690 / Q9} Qhov kev nce qib qis dua, uas yuav tsum tau ua rau muaj kev sib tw hauv nruab nrab,
Q345 txoj kev ua tau zoo yog "lub zog siab + broad -} spectrum tawv." Yog tias tsis xav tau kev kho rau cov kev siv tshwj xeeb, nws npog tau ntau tshaj li 80 {{}}} lub zog hlau thov.
Lub zog hloov kho tau: Lub zog nruab nrab tau ua raws li lub tsev ua haujlwm (chaw ua lag luam) Tsis muaj qhov yuav tsum tau ua kom muaj zog ntau dhau (zam kom kim heev "kev ua tau zoo rov qab").
Kev them dav: Lub sub {{0 ° C - E2 ° C ({} {{{19 ° C, E: - 60 ° C). Qhov no yog qhov zoo dua li feem ntau tsawg-zog, cov hlau tsis tshua muaj (piv txwv li, Q390, uas tsuas yog muaj kev ntaus nqi ib qib). 40 ° Cle Cov Kev Ntsuas Cov Lus Qhia Txog Qhov Ntau Ntawm Cov Nrig Sib Nraus (xws li steel qhov kev hloov kho hauv thaj chaw txias (kev siv hluav taws xob txaus
Q345 Qhov tsis zoo kav los ntawm nws txoj haujlwm raws li "theem pib ua kom muaj zog thiab tsis txaus siab, thiab siab- kub tsis kam). Qhov kev tsis zoo no yog manifested hauv peb qhov tseem ceeb:
1. Qes lub zog sab sauv qis dua, tsis tuaj yeem ntsib lub teeb yuag thiab siab {{1} hews} Cov khoom siv thauj khoom
Nrog nce kev lag luam thov kom muaj "lub teeb nyuaj" thiab "high {{}}}}}} qhov hnyav piv txwv.
Kev sib piv nrog Q460 / Q690: nyob rau hauv tib yam kev yuav tsum tau, Q345 daim ntawv thickness yuav tsum muaj kwv yees li 25kn, Q345 yuav tsum muaj 12 hli, tsuas yog xav tau 9 hli). Qhov no ua rau muaj kev nce phaus thiab kev thauj mus los / cov nqi tsim kho. Tus nqi teeb tsa yog nce. Piv txwv li, siab-}} Lub luag haujlwm tsheb tau siv Q610 / Q960 los tsim cov thav ntawv kom ua tiav kev sib tw thiab roj efficiency. Cov thav ntawv no tau dhau 30% ntais dua Q345 thav ntawv, uas Q345 tsis tuaj yeem ua tiav.
Piv nrog kub {-} Zoo li cov qauv hluav taws xob (xws li Sedan}}}}} Lub zog steel nrog 1500mpa lossis siab dua. Q345 lub zog yog qhov deb dua tsis txaus ntseeg, ua rau nws tsis muaj cov khoom tshwj xeeb (cov tsiaj tsis kam, thiab kub ua rau muaj kev ntxiv.
Q345 yog "General - hom phiaj qes -} alloy steel" tsis muaj cov ntsiab lus rau cov chaw tshwj xeeb. Yog li ntawd, rau cov huab cua tsis kam, thiab kub tsis kam, nws yuav tsum tau tshaj tawm- kev kho thiab kho cua sov). Nws cov nqi thiab kev ntseeg tau yog qis dua rau tshwj xeeb qis-} aleloy steel:
Tsis zoo hnav tsis kam: Q345 muaj lub hardness ntawm kwv yees li ntawm kwv yees li 140}} 160 hb, nyob deb dua nm450, uas muaj lub hardness ntawm ≥450 HB). Txhawm rau siv nyob rau hauv high -}}}}} pa ntaub ntawv xws li cable machinery thoob thiab ntaub npog {9} {reasant txheej los yog quenching. Tshwj xeeb hnav-resistant steels (xws li NM360) tuaj yeem siv ncaj qha yam tsis muaj kev ua ntxiv.
Cov huab cua tsis zoo: Q345 tsis muaj huab cua {{}}}}} mm / xyoo tom qab tsib xyoos ntawm sab nraum zoov kis. Weathering hlaus (xws li Q355NH), uas ua ke ntawm CU {} p {}} p {} {}}} kev tiv thaiv corrosion corrosion. " Txawm li cas los xij, yog Q345 yog siv rau hauv cov qauv steel sab nraum zoov (xws li hla- corrosating nkawm (tha xim thiab galvanizing nqi.
Kev siv hluav taws xob siab tsis txaus:} npau taws rau Q345 yog kwv yees li 300 ° C (xws li boilers thiab siab- kub pipelines). Muaj zog tshwj xeeb kub - Cov hlau tiv taus ntev ntev ntawm lub sij hawm ntawm 540 ° C thiab}}}}} lwm cov loadarios.
Cheebtsam xws li cov chaw ua lag luam tshuab hluav taws xob thiab cov tshuab ua pob ua ke ≥ 50% ntawm cov txiaj ntsig zoo). Thaum Q345 txoj kev ua phem ua tau raws li qhov yuav tsum tau ua tiav, nws tseem lag luam qab siab dua- lub zog hlaus lossis cov uas muaj kev kho tshwj xeeb.
Q345's Chav-} Kev qaug zog lub zog yog li 1750-380 MPa (kwv yees li ntawm 52%
Yog tias Q345 yog siv rau hauv high -}}}} zoo li cua turarios (xws li cua turline ntauwd flanges), nws yuav tsum tau tua cov panening lossis nto hardening los txhim kho kev ua phem ntom ntom ntom. Txwv tsis pub, qaug zog tawg yog yuav tshwm sim, ua kom luv luv lub neej.