European steel qibS890 qw(EN 10025-6) muaj qhov ncaj ncees thiab tseem ceeb hauv Suav teb tus qauv (GB) sib npaug, tab sis kev ua tiav qhov sib npaug tiag tiag yuav tsum muaj cov lus qhia meej heev.
Qhov sib npaug ncaj qha yog:
Q890D lossis Q890E muab nyob rau hauv Quenched thiab Tempered (Q + T), feem ntau raws li tus qauv GB / T 16270-2018 (High lub zog steel daim hlau).
1. Qhov tseeb GB Qib: Q890D / Q890E
Qib Qib:
Q= Yield zog (Qufu hao)
890= Yam tsawg kawg nkaus tawm lub zog hauv MPa (rau thickness Tsawg dua lossis sib npaug li 16 hli).
D / E= Qib Qib (Toughness Level)
D: Kev cuam tshuam toughness kuaj ntawm -20℃.
E: Kev cuam tshuam toughness kuaj ntawm -40 degree.
Primary Standard:GB / T 16270-2018 yog tus qauv tseem ceeb npog cov hlau los ntawm Q460 txog Q960 hauv ntau yam khoom xa tuaj.
2. Cov ntsiab lus tseem ceeb rau qhov sib npaug tiag
Matching S890QL tsis yog hais txog tus lej "Q890" xwb. Tus mob "QL" (Quenched thiab Tempered) yog tus yam ntxwv txhais. Tsuas yog xaj "Q890E" tsis txaus thiab pheej hmoo.
Koj yuav tsum qhia meej meej:
"Q890E (rau -40℃cuam tshuam) hauv Quenched thiab Tempered (Q + T) tus me nyuam tus mob raws li GB / T 16270-2018."
Yog vim li cas qhov no yuav tsum tau:GB / T 16270 tso cai rau kev xa khoom sib txawv (xws li, Thermomechanical Rolling / TMCP lossis Quenching & Tempering). TMCP steel tej zaum yuav ua tau raws li lub zog tab sis yuav tsis zoo ib yam los ntawm - thickness microstructure uniformity, tempering cov txiaj ntsim, thiab guaranteed tawg toughness raws li ib tug tseeb Q + T steel. Kev ua tau zoo hauv cov txheej txheem welded tseem ceeb yuav raug cuam tshuam.
3. Kev sib piv khoom: S890QL vs. GB sib npaug (Q890E Q+T)
| Khoom | S890QL (EN 10025-6) | Sib npaug Suav Qib |
|---|---|---|
| Txuj | TS EN 10025-6 | GB/T 16270-2018 |
| Qib | S890 qw | Q890E (rau -40℃cuam tshuam) |
| Min. Yield (ReH) | Ntau dua lossis sib npaug rau 890 MPa (t Tsawg dua lossis sib npaug li 16mm) | Ntau dua lossis sib npaug rau 890 MPa (t Tsawg dua lossis sib npaug li 16mm) |
| Tensile (Rm) | 940 - 1100 MPa | 940 - 1100 MPa (Txuas) |
| Impact Toughness | 27J @ -40 degree | Ntau dua lossis sib npaug rau 47J @ -40 degree(Faj seeb: GB yuav tsum tau siab dua) |
| Kev Xa Khoom | Quenched & Tempered (QL) | Yuav tsum tau teev tseg: Quenched & Tempered (Q + T) |
| Daim ntawv thov tseem ceeb | Ultra-siab-lub zog, hnyav- cov khoom tseem ceeb. | Ib yam: Cov khoom siv mining, qib siab crane booms, tshwj xeeb machinery. |
4. Kev txiav txim siab tseem ceeb ntxiv rau S890QL/Q890E
Weldability yog qhov Kev Sib Tw Loj:Nyob rau theem no lub zog (890 MPa tawm los), vuam ua ib qho kev kawm tshwj xeeb. Nws xav tau:
Sib piv ultra-siab- lub zog vuam siv tau (xws li, tawm lub zog ntau dua lossis sib npaug rau 890 MPa).
Exquisitely tswj cov txheej txheem:nruj preheating, tsawg tshav kub input, thiab yuav luag ib txwm yuav tsum tau Post-Weld Heat Treatment (PWHT).
Ntau yam uas tsis yog -kev kuaj kev puas tsuaj (NDT).
Tsis yog General Structural Steel:Cov khoom siv no tsuas yog siv rau hauv qhov hnyav tshaj plaws- cov khoom tseem ceeb ntawm cov tshuab ua haujlwm siab tshaj plaws (xws li, sab nraud ntawm qhov ntev tshaj plaws crane booms, ultra- siab- lub tog raj kheej siab, tshwj xeeb kev siv tub rog / kev tiv thaiv). Nws cov nqi thiab fabrication complex yog txwv tsis pub siv tus qauv.
Los ntawm -Thickness Properties:Rau cov phaj tuab, kev qhia Z-kev taw qhia (los ntawm-} tuab) kuaj (piv txwv li, Z25 lossis Z35 ib GB / T 5313) feem ntau yuav tsum tau ua kom tsis txhob lamellar tearing hauv cov welds uas muaj kev txwv ntau heev.
5. Cov Lus Qhia Txog Kev Muag Khoom
Txhawm rau kom ntseeg tau tias koj tau txais cov ntaub ntawv raug, koj qhov kev qhia tshwj xeeb yuav tsum hais:
"Cov ntaub ntawv:Q890E raws li GB / T 16270-2018, hauv Quenched thiab Tempered (Q + T) tus me nyuam tus mob. Yam tsawg kawg nkaus toughness: Ntau dua los yog sib npaug rau 47J ntawm -40 degree. Cov ntaub ntawv pov thawj (Hom 3.1 lossis 3.2) yuav tsum qhia meej meej txog Q + T txheej txheem kev kho cua sov thiab tshaj tawm tag nrho cov kev sim tshuab. "
Rau cov ntawv thov offshore, koj yuav tsum tau siv tus qauv zoo li GB / T 25830 (uas yog daim ntawv thov offshore -cov qauv tsom tau los ntawm EN 10225) thiab suav nrog kev nruj nruj thiab CTOD (Crack Tip Opening Displacement) cov kev xav tau.
Xaus
Cov khoom sib npaug rau S890QL yog Q890E hauv Quenched thiab Tempered mob ib GB / T 16270-2018. Qhov kev sib tw tseem ceeb yog ua kom ntseeg tau tias "QL" mob tau cog lus kaw, vim tias qib GB lub npe nws tus kheej tsis qhia qhov no. Cov ntaub ntawv no sawv cev rau qhov tseeb pinnacle ntawm kev lag luam muaj welded structural steel thiab yog tshwj tseg rau cov ntawv thov uas nws qhov kev ua tau zoo tshaj plaws ua rau tus nqi tshwj xeeb thiab kev siv dag zog.