Q345 steel yog cov feem ntau siv qis qis - {{{2 {{2 {2 {series hauv S355 Series Hauv Cov Qauv Thoob Ntiaj Teb). Nws cov txiaj ntsig tseem ceeb yog qhov kev sib xyaw ntawm lub zog siab, kev ua tau zoo, kev nruj me ntsis, thiab muaj txiaj ntsig ntawm cov ntsiab lus tsawg. Yog li ntawd, nws yog dav siv hauv cov ntawv thov uas yuav tsum tau siv ob qho tib si thauj khoom - Cov khoom muaj peev xwm. Cov ntsiab lus hauv qab no nws siv los ntawm peb lub kev xav: Cov chaw thov tseem ceeb, cov xwm txheej raug, lawv cov laj thawj, thiab kev saib xyuas zoo:
1. Cov chaw thov tseem ceeb: adapting rau cov xwm txheej raws li "siab lub zog + yooj yim tshuab yooj yim"
Q345 Cov txiaj ntsig lub zog (ntau dua lossis sib npaug zos rau 345 MPa) yog qhov ntau dua li cov pa roj carbon hlau (piv txwv li lub zog ntawm ntau dua lossis sib npaug rau 235 MPa). Nws tseem muaj kev vam meej zoo thiab cuam tshuam tawv (tshwj xeeb tshaj yog muaj tsawg - kub sab nrauv). Nws tseem ua pov thawj zoo heev Veldability, xav tsis muaj kev ua pretreclecture. Yog li ntawd, nws yog feem ntau siv nyob rau hauv cov txheej txheem qhov, engineering khoom, thiab cov khoom loj uas yuav siv zog thiab zoo li qub.
Ii. Qhov sib txawv hauv cov ntawv thov rau cov qib sib txawv: Xaiv cov hom tsim nyog raws koj cov kev xav tau
Q345 tsis yog ib qib nkaus xwb, tab sis ib tsev neeg ntawm cov qhab nia steel. Cov hnub ua haujlwm sib txawv (xws li A / C / C / E, R, N, Etc. Kev kho kom sov thiab kev kho kom sov,
Q345A: Tsis muaj tsawg {{- qhov kev cuam tshuam kub thiab tsis muaj kev thauj khoom kub (xws li cov khoom siv hluav taws xob zoo nkauj (xws li cov cuab yeej siv hluav taws xob zoo tib yam);
Q345B / C / D / E: Qes {{1} kub cuam tshuam nyuaj zuj zus (qib siab ntau dua lossis sib npaug rau -40 degree). Qib E yog feem ntau siv nyob rau hauv cov choj, cua tshuab raj, thiab cryogenic cia tso tsheb hlau luam nyob rau hauv txias qaum teb thaj chaw;
Q345r: "R" sawv ntsug rau "Siab Hlaws Hlau." Tom qab ib txwm ua, nws ua rau pom kev zoo heev thiab kev laus tawm tsam tom qab vuam thiab muaj kev tsim tshwj xeeb rau kev tsim tawm nruab nrab;
Q345nd: "N" sawv ntsug kev kho mob, "thiab" sawv "sawv ntsug tsis muaj qhov kub thiab txias (tsim nyog rau} 40 4}} Nws yog siv rau kev tsim tshuab machinery thiab offshore platform cheeb tsam raug rau cov chaw tsawg-kub. III. Daim Ntawv Thov Txiav Txim
Vuam txuam: Thaum vuam Q345, siv Vuam cov xov hlau / Electrodes nrog cov hlau vuam) kom tsis txhob sib koom ua tsis tiav ntawm cov khoom siv weld.
Kev ua haujlwm txias tswj: Thaum khoov thiab pob qij txha yog ua tau, piv txwv li, me me bend radius) tej zaum yuav ua rau muaj kev ntseeg siab me. Yog li ntawd, kev ua tsis taus yuav tsum tau hloov kho raws li cov tuab.
Corrosion tiv thaiv: Thaum siv sab nraum zoov lossis hauv kev tiv thaiv corrosion (piv txwv, kub}} dip galvanizing) yog yuav tsum tau los tiv thaiv xeb los ntawm kev txwv tsis pub muaj xeb cov khoom siv.
Thickness nyhuv: lub zog thiab tawv zuj zus zuj zus me ntsis nrog kev nce ntxiv hlau thickness ("tuab nyhuv"). Rau cov paib tuab (piv txwv li, ntau dua lossis sib npaug nrog 50mm), xaiv cov qhab nia uas tau raug kuaj xyuas kom ntseeg tau tias lawv tsis muaj kev cuam tshuam nrog sab hauv.
Hauv cov ntsiab lus, Q345, vim nws lub zog siab, nqi- qhov ua tau zoo, tau dhau los ua kev tsim kho, kev thauj khoom, thiab lwm thaj teb. Nws cov kev thov tshwj xeeb yuav tsum tau txiav txim siab raws li kev ua yeeb yam sib txawv ntawm cov qib sib txawv ntawm cov qib kev kawm thiab kev ua haujlwm.