1.What yog lub ntsiab lus tseem ceeb ntawm Q345B?
"Q" sawv ntsug rau "Qi" (Pinyin Startic ntawm tus cwj pwm rau "paib lub zog"
"345" Qhia txog cov hlau qis dua lub zog txo ntawm 345 Mpa yam tsawg kawg ntawm cov hlau yuav tsum tsis pub tsawg tshaj 345 MPa).
"B" sawv cev rau cov hlau cov qib zoo, koom nrog qhov qis - roj carbon steel qeb. Nws sib thooj rau kev cuam tshuam cov kev cai nruj cov cai Tsis muaj qhov tsawg - kub cuam tshuam cov kev xav tau (rau Q345C / d / e, tsawg} Kev cuam tshuam kub cuam tshuam, thiab -40 degree, ntsig txog).
2.What yog cov tshuaj lom neeg siv tshuaj lom neeg ntawm Q345B?
Cov pa roj carbon (c): tsawg dua los yog sib npaug rau 0.24% (cov pa roj carbon qis txo qhov kev pheej hmoo ntawm cov kev pheej hmoo txias thaum lub sij hawm vuam kaus mom);
Silicon (si): tsawg dua los yog sib npaug rau 0.55% (deoxidizer, txhim kho steel smelting zoo);
Manganese (MN): tsawg dua lossis sib npaug ntawm 1.60% (loj ntxiv cov khoom siv ntxiv, ua kom muaj zog steel los ntawm cov tshuaj muaj zog zog);
Phosphorus (p): tsawg dua lossis sib npaug rau 0.035%;
Sulphur (s): tsawg dua los yog sib npaug rau 0.035% (P thiab S yog cov teeb meem immulities thiab yuav tsum nruj me ntsis tswj kom tiv thaiv cov hlau embrittlementlement);
Vanadium (V), Niobium (NB), thiab titanium (TI): Yuav tau muab ntxiv rau 0.22% (Microalloying lub zog thiab kev siv zog ntau dua).
3.Qhov yog cov khoom siv tshuab ntawm Q345B?
Lub zog tensile: 470-630 MPa (qhov siab tshaj plaws kev ntxhov siab cov hlau tuaj yeem tiv taus ua ntej tawg, xav txog cov khoom siv "lub zog cia");
Elongation (a): ntau dua los yog sib npaug ntawm 21% (sawv cev ntawm tus nqi txheeb ze ua ntej tawg;
Kev cuam tshuam hluav taws xob (AK): ntau dua lossis sib npaug ntawm 34 j (muaj peev xwm tiv thaiv cuam tshuam cuam tshuam kev cuam tshuam ntawm steel yog tsawg dua kev ua kom tawg tau nyob rau hauv kev cuam tshuam);
Kev uazaum txias: lees paub (tsis muaj kab nrib pleb hauv qhov chaw khoov thaum lub sij hawm txheem txias khoov qhia zoo yas thiab yooj yim ntawm kev tsim).
4.What yog cov tub ntxhais muaj txiaj ntsig ntawm Q345b?
Lub zog siab thiab lub teeb ua ntej: piv rau Q235b, nrog rau cov qauv siv hlau thiab cov kab txuas ntxiv, cov kab ke no, cov hauv paus -}}} kev coj cov kabmob siab).
Zoo tag nrho kev ua tau zoo: Nws ua ke ua ke lub zog siab, ductility, thiab muaj zog}
Kev lag luam: ntxiv dag zog los ntawm kev sib ntxiv ntawm microalloy cov kev xav tau (V, NEX)
5.Qhov yog cov ntawv teev npe raug ntawm Q345b?
Kev tsim kho: High -} ROSS TSEV STEEL qauv, kev txhawb nqa kab teeb, thiab lwm yam kom txo qis cov qauv txheej txheem);
Choj engineering: steel thawv girders thiab trusses rau me thiab nruab nrab {{{0} {
Machinery
Pipeline Engineering: Siab - cov roj siab roj / roj pipelines, thiab lwm yam muaj zog tseem ceeb);
Automotive thiab tubrog nkoj: Cov tsheb thauj khoom, nkoj licks, thiab lwm yam (lwm yam zog rau kev hnav khaub ncaws hnav).