1.What yog qhov sib txawv ntawm ob qho nyob rau hauv cov nqe lus ntawm lub hom ntsiab lus thiab cov tub ntxhais lub zog?
Ob qib kawm tau raug xaiv raws li "Q + tsawg kawg nkaus los lub zog hauv lub zog + Cov qib zoo" (qee qib tsis muaj ib qib ntawm qib pib). Cov tub ntxhais sib txawv li cas feem ntau feem ntau tshwm sim zog:
Q345B: "Q345" Qhia tawm ib qho txiaj ntsig lub zog ntawm tsawg kawg 345 mpa; "B" sawv cev rau qib zoo (sib xws rau 520℃kev cuam tshuam nyuaj ua qhov yuav tsum tau).
Q390: "Q390" Qhia tawm lub zog los lub zog ntawm tsawg kawg 390 mpa (kwv yees li 13% siab dua Q345B); Cov qhab nia zoo kuj suav nrog A, B, thiab C (piv txwv, Q390B raug cai rau -20℃kev cuam tshuam cov kev xav tau).
2.What yog qhov sib txawv ntawm cov neeg kho tshuab nruab nrab ntawm ob?
Tos lub zog: Q390 yog kwv yees li 13% siab dua, txiav txim siab ncaj qha rau nws lub load sab saud {2 2}} cov kabmob muaj peev xwm.
Lub zog tensile: Q390 muaj qhov ntau dua lub zog (kwv yees li 21% -14% siab dua Q345B), zoo ib yam li muaj zuj zus tuaj lub zog zog.
Kev Txom Nyem: Q390 tau qis me ntsis qis dua (ntau dua yog feem ntau ua rau muaj kev sib cais me me), tab sis tseem ua tau raws li cov qauv "yas deformation."
Kev Cuam Tshuam Tougness: Hauv cov qib zoo tib yam (piv txwv li cov kev xav tau nruj heev (tus qauv nyuaj qis - qhov kub muaj qhov tsis ua tiav).
3.Yog li cas qhov sib txawv hauv weldability ntawm ob?
Cov pa roj carbon sib npaug ntawm Q345B feem ntau tsawg dua los yog sib luag rau 0.45%, muab kev weldability zoo tshaj plaws. Cov vuam (xws li arc vuam thiab submerged arc vuam) tsis tas yuav muaj kev kub siab ntau dua los yog sib npaug rau ntawm {}}} chaw ntawm batch vuam.
Q390 cov pa hluav taws xob sib npaug yog qhov siab dua me ntsis Q345B (feem ntau tsawg dua lossis sib npaug ntawm cov khoom sib ntxiv ntawm cov ntsiab lus ntawm alloy. Nws tseem ua pov thawj ib qho kev nyiam me ntsis kom tawv me ntsis, xav tau cov txheej txheem stricter tswj thaum lub sijhawm vuam. Piv txwv li, preheating rau 50 {{- 100℃yog qhov yuav tsum tau rau cov chaw tsawg (tsawg dua los yog sib npaug 0 degree). Vuam tuab daim hlau (ntau dua los yog sib npaug nrog 25mm) tej zaum yuav tsum tau muaj qhov kub siab dua, thiab tswj hluav taws xob weld zog kom tsis txhob kub thiab txias.
4.What yog qhov sib txawv hauv kev ua haujlwm txias / kub ua haujlwm ntawm ob qho?
Txias ua haujlwm (piv txwv li, khoov, khoov): ob qho tib si lub zog, tab sis qis dua lub zog txias, thiab ua kom muaj zog me ntsis yuav tsim nyog rau cov ces kaum loj dua.
Kub ua haujlwm (piv txwv li, dov, Forging): Cov txheej txheem txawv me ntsis, thiab ob leeg yog qhov tsim nyog rau cov txheej txheem kub.
5.Qhov twg yog qhov sib txawv ntawm lawv daim ntawv teev cov xwm txheej?
Q345B: Qhov kev xaiv "zoo tshaj plaws rau tus nqi - ua hauj lwm zoo," haum rau feem ntau cov ntawv thov.
Vim nws lub zog nruab nrab, zoo heev weldability, thiab tus nqi qis dua (5% qis dua li Q390), Tam sim no siv cov hlau qis qis qis qis hauv kev tsim kho thiab engineering. Nws thawj cov ntawv thov muaj xws li:
Num xoos / kab ntawv rau siab {{}}}} Be} Beams rau cov khoom siv muaj (rau nruab nrab}
Me me thiab nruab nrab {- qhov chaw nyob qis dua lossis sib npaug rau 30m), thiab txhawb nqa rau cov tub rog hauv kev lag luam (xws li cov teeb liab uas muaj teeb liab thiab cov teeb liab);
Hlau -} qhob composite qauv (xws li composite cov teeb cig thiab qhob {} {{} {{{}.
Q390: "Siab {{-} Lub zog thov cov xwm txheej," tsom mus rau "qhov hnyav txo qis thiab kev txhim kho zoo."
Due to its higher strength, it is suitable for scenarios with high loads and the need for controlled component cross-sections. It can achieve weight reduction or space savings by reducing steel usage or reducing cross-sections. Nws thawj cov ntawv thov muaj xws li:
Cov leeg tub ntxhais ntawm Super - high- Cov nqaj loj), cov nqaj loj ntawm ntev- span choj (spans ntawm 30-50m);
Cov cuab yeej hnyav txhawb kev txhawb nqa (piv txwv li, taug kev kab teeb rau cranes ntau tshaj 100t); thiab cov qauv tshwj xeeb (piv txwv li, hlau hulls ntawm cov tso tsheb hlau luam loj loj thiab cov txheej txheem tso zis rau cov platform ntug dej);
Qhov hnyav {{0 {{}}, steel box Girders rau cov neeg ua haujlwm ua ntej ntawm 10%-15%.