1.What ua Q3555B hom txhais tau tias?
Q: Tus lej Pinyin rau "tawm lub zog" (Qu Fu Qiang Du), qhia lub zog uas cov qhab nia hlau no feem ntau yog muaj qhab nia raws li cov txiaj ntsig muaj zog.
355: Qhia tias qib steel no muaj qhov qis dua lub zog ntawm 355 MPa lossis siab dua (ntawm Q235 loj dua lossis muaj zog ntau dua li 51%.
B: Qhia txog qib zoo ntawm cov hlau, uas tau faib raws li kev cuam tshuam los ntawm kev cuam tshuam thiab Sulfur Cov Ntsiab Lus (GB / T 15 C / B / C / B / C). Qib B Hlau Yuav Tsum:
Cov ntsiab lus Sulfur tsawg dua lossis sib npaug rau 0.040%, phosphorus cov ntsiab lus tsawg dua lossis sib npaug rau 0.045% (qis dua kev ua kom zoo dua qub);
Chav nyob kub (20 degree, v - It})) yog qhov yuav tsum muaj, nrog rau kev cuam tshuam tsis kam nyob hauv ib cheeb tsam uas tsawg dua kub).
2.Qhov dab tsi yog cov txheej txheem core tshuab ua haujlwm ntawm Q355B?
Qis tawm tswv yim zog: ntau dua lossis sib npaug rau 355 mpa; Lub ntsiab lus tseem ceeb ntawm cov qauv tsim qauv, txiav txim siab cov hlau muaj peev xwm tiv thaiv cov khoom siv qub qub, ua kom muaj kev txo qis hauv cov cross- seem thiab qhov hnyav.
Tensile lub zog: 470-630 mpa; Qhov ntau tshaj plaws tensile lub steel tuaj yeem tiv taus ua ntej tawg, kom nws tiv taus nrawm dua ntais hauv ntau dhau.
Elongation: ntau dua los yog sib luag rau 21%; Ib qho kev ntsuas ntawm tus hlau lub platform, ua kom cov Cheebtsam tiv thaiv loj heev nyob rau hauv kev ntxhov siab thiab deformation, fidilitating fabrication thiab sib sau ua ke.
Chav Ntsuas Kub cuam tshuam lub zog: ntau dua lossis sib npaug nrog 34 j; ua kom pom kev cuam tshuam tsis pom zoo nyob rau hauv ib puag ncig ib puag ncig, tiv thaiv kev loj hlob thaum siv thaum siv qis kub (<20°C).
3.Qhov yog cov tshuaj lom neeg muaj pes tsawg leeg ntawm Q355B?
C: Tsawg dua lossis sib npaug rau 0.24%; Kev tswj cov ntsiab lus carbon cov ntsiab lus kom muaj zog thiab cov pa roj av (roj carbon ntau dua weldability thiab nce kev pheej hmoo ntawm txias brittleness).
Si: tsawg dua los yog sib npaug rau 0.55%; Cov khoom siv daws teeb meem zog ntawm lub zog uas txhim kho lub zog tsis muaj zog yam tsis muaj kev nce qib.
MN: 1.00-1.60%; Ib qho tub ntxhais ntxiv dag zog ntxiv uas txhim kho lub zog thiab tawv los ntawm kev ua kom huv thiab cov tshuaj muaj zog, txhim kho kev ua haujlwm.
P: Tsawg dua lossis sib npaug rau 0.045%; Kev tsim txom impurity uas tuaj yeem ua rau txias brittleness thiab yuav tsum tau txwv nruj me ntsis.
S: Tsawg dua lossis sib luag rau 0.040%; Kev tsim txom impurity uas tuaj yeem ua rau kub brittleness (tawg thaum siab- kub ua) thiab yuav tsum siv tsawg.
4.What yog cov chaw thov ntawm Q355?
Tsev steel qauv: siab {{} Rose steel thaib, hloov Q235 yuav txo cov kev siv hlau thiab qis dua tus qauv hnyav);
Kev siv tshuab: thav duab thiab rooms rau cov excavators, cranes, thiab lub zog, thiab lub zog ntawm Q355B ua tau zoo);
Txuas hniav thiab chaw tsim khoom hauv nroog: Cov kab hlau steel rau kev siv hluav taws xob me me, thiab cov phiaj xwm sab nraum zoov, uas tuaj yeem txhim kho los ntawm kev kho mob saum npoo av);
Kev tsim tshuab: tshuab cov cuab yeej txaj, tsis rau siab {{} {{{1} {} Lub zog high- Lub zog high- Lub zog high}
Lub Tsheb Raug: Cov thav duab thiab lub cev ntas rau cov tsheb lag luam (tsheb thauj khoom thiab cov tsheb npav) (txo cov tsheb hnyav thiab kev txhim kho load kev ua haujlwm).
5.Qhov twg yog qhov kev ceev faj kom ceev faj rau siv Q355B?
Weldability: Q355B tau weldability zoo heev thiab tuaj yeem welded siv cov txheej txheem pa hluav taws xob xws li arc vuam, tog arc vuam) thiab cov pa thaiv cov thaiv arc vuam (bing vuam). Txawm li cas los xij, cov kev ceev faj hauv qab no siv:
Rau thicknesses ntau dua 40mm, preheating (80-150 degree) yuav tsum ua ntej vuam kom tsis txhob muaj weld tawg.
Nws raug nquahu kom siv cov hlau sib txuas hlau / Electrodes (xws li ER50 Series Vuam Hlau thiab E50 Series Vuam Qws).
Tsawg - qhov kub thiab txias: Qib B Steel tsuas yog muaj kev cuam tshuam rau hauv qis {degree}}} Rau qis - sov daim ntawv thov, qib siab-qib-qib siab dua li Q355C (0 Degree cuam tshuam lub zog) thiab Q355D (-40℃cuam tshuam lub zog) yuav tsum tau siv.
Cov txheej txheem: txias ua haujlwm xws li shearing, stamping, thiab khoov yog ua tau (cov khoom siv yas tau raws li qhov yuav tsum tau). Txawm li cas los xij, tom qab kev khoov txias, kev ntxhov siab sab hauv yuav tsum tau tshem tawm kom tsis txhob muaj excormation tom qab. Corrosion tiv thaiv: Thaum kev kho sab nraum zoov lossis kev kho mob saum npoo (xws li cov xim kub (xws li cov hlau ua kom tsis muaj cov qhab nia tshwj xeeb xws li Q355NH).