Q355B

Q355B
Q355B yog qhov qis -} Alloy alloy, Siab} {}}} - Lub zog ntawm lub teb chaws qib hlau tshwj xeeb (GB / T 1591-2018). Nws yog dav siv nyob rau hauv kev tsim khoom machinery tsim, tsim kev tsim khoom, cov qauv steel, thiab lwm thaj teb. Nws cov kev ua tau zoo thiab kev thov cov yam ntxwv muaj raws li nram no:
1. Qib lub ntsiab lus
Q: Sawv tsees "tawm lub zog" (thawj tus tsiaj ntawv ntawm tus pinyin "Qǔfú yog lawm".
355: Qhia txog cov hlau qis dua cov txiaj ntsig qis zog zog zog ntawm 355 MPa (ntawm chav tsev kub).
B: Denotes qib qis dua, uas yog categorized los ntawm kev cuam tshuam cov tawv rau hauv, B, C, D, thiab e cov qib. Qib B yuav tsum muaj kev cuam tshuam lub zog (AKV) ntau dua lossis sib npaug ntawm 34 j nyob rau hauv ib qho kev cuam tshuam rau tsawg {{}}} -20 degree).
2. Cov khoom tseem ceeb
Cov cuab yeej kho tshuab: Tensile lub zog ntawm 470-630 MPa, tawm los ntawm 555 MPa, thiab elongation ntau dua lossis sib npaug li 22%. Nws ua kom muaj zog thiab kev nyuaj, thiab cov txheej txheem welding (vuam cov txheej txheem yuav tsum ua tib zoo tswj kom tsis txhob tawg). Tshuaj lom neeg muaj feem: carbon (c) tsawg dua lossis sib npaug rau 0.24%, mannese (mn) tsawg dua lossis sib npaug lossis sib npaug nrog 0.55%. Me me ntawm cov khoom siv alloy (xws li NB, V, thiab ti) tseem suav nrog txhim kho lub zog thiab weldability. Impurities xws li sulfur (s) thiab phosphorus (p) yog tsawg (qib b yuav tsum tau p tsawg dua lossis sib npaug lossis sib npaug 0.035%).
3. Cov ntawv thov tseem ceeb
Kev tsim kho tsim: Cov qauv hlau loj loj (xws li txuas hniav, muaj zog}} Rising crane cov txheej txheem), thiab ntau yam nws lub zog siab los txo cov teeb meem hnyav.
Kev tsim tshuab: Cheebtsam (excavator thiab cov khoom siv hluav taws xob (tsis yog rau qhov siab kub), cov khoom siv siab, uas yuav tsum tau tiv thaiv cov khoom hnyav thiab cov nyom nyuaj.
Lwm Cov Kev Siv: Tsheb tsim khoom (cov tsheb thauj khoom (cov roj tshwj xeeb), thiab lwm yam ntawm lub zog (nruab nrab}}
Q355B yog qhov qis -} alloy steel nrog ib lub zog ntawm 355 MPa siab dua Q235 (235 MPa), ua kom haum rau cov kev siv kom tau muaj zog dua.
Tus nqi yog siab dua Q235, tab sis tag nrho cov nqi yuav raug txo los ntawm txo cov tuab, muab tus nqi zoo dua-} kev piv txwv.
Hauv cov ntsiab lus: Q355B yog qhov siab {1} {} lub zog, yooj yim welloy qauv steel thiab cov khoom siv tshuab uas yuav tsum tau tiv thaiv kev ntxhov siab hnyav lossis nyuaj siab. Nws yog qhov siab - kev hloov kho rau ib txwm muaj rau cov qes qis- cov hlau hlau xws li Q235.