Kev txiav txim siab DNV Steel Qib: Los ntawm Base mus rau Siab -Lub zog, Yuav ua li cas xaiv qib zoo rau koj qhov project?
Hauv kev tsim khoom hauv nkoj thiab sab nrauv, xaiv cov khoom tsim nyog yog tus yuam sij kom muaj kev nyab xeeb, ua raws, thiab tus nqi- ua tau zoo.DNV (Det Norske Veritas), raws li ib qho ntawm lub ntiaj teb kev ua lag luam kev faib tawm, teeb tsa tus qauv kub rau cov hlau siv hauv kev siv dej hiav txwv. Txawm hais tias koj tab tom tsim dej hiav txwv- mus rau cov nkoj, cov nkoj hauv hiav txwv, lossis lwm cov qauv hauv hiav txwv, kev nkag siab txog DNV steel grading system yog thawj kauj ruam tseem ceeb tshaj plaws.
Tsab ntawv xov xwm no muab cov lus qhia ntxaws ntxaws ntawm DNV steel qib-los ntawm lub zog dav dav mus rau ultra- siab zog- nrog rau cov kev ua haujlwm tseem ceeb los pab koj txiav txim siab txog kev yuav khoom.
Qhov Basic Classification Logic ntawm DNV Steel
DNV steel designations ua raws li qhov tseeb logic, feem ntau xav txog ob yam khoom:Lub zogthiabToughness(Impact resistance).
Ua ntej, DNV steels tau muab faib ua ob pawg loj raws liLub zog:
Mild Steel (General Strength): Cov no yog cov qhab nia tseem ceeb uas muaj lub zog txaus thiab zoo weldability, haum rau cov khoom siv tsis tshua muaj teeb meem.
Siab -Tensile Steel (HT Steel): Txhim kho nrog cov ntsiab lus alloying (xws li niobium, vanadium, thiab titanium) thiab ua los ntawm cov txheej txheem tswj dov thiab txias, cov hlau no ua tiav cov txiaj ntsig zoo dua. Qhov no tso cai rau kev thauj khoom ntau dua - cov kabmob muaj peev xwm tsis muaj qhov hnyav ntxiv - qhov tseem ceeb rau kev tsim lub teeb yuag.
Thib ob, raws liToughness(kev cuam tshuam lub zog ntawm qhov kub thiab txias), steels tau muab faib ua qibA, B, D, E, thiab F. Tsab ntawv no qhia txog qhovyam tsawg kawg nkaus Charpy V-qhov cuam tshuam lub zogntawm qhov ntsuas kub ntsuas, ncaj qha ntsig txog kev nyab xeeb ntawm lub nkoj thaum taug kev hauv cov dej txias lossis cov polar.
Cov ncauj lus kom ntxaws ntawm Main DNV Steel Qib
Hauv qab no yog cov qib DNV steel ntau tshaj plaws thiab lawv cov kev ua haujlwm tseem ceeb.
1. General Strength Steels (Yield zog ntau dua los yog sib npaug rau 235 MPa)
Cov no yog cov feem ntau siv carbon steel daim hlau. Lub ntsiab DNV cov qhab nia muaj zog yogA, B, D, thiab E, nrog qhov sib txawv tseem ceeb hauvcuam tshuam qhov ntsuas kubthiabkev xa khoom.
| Qib | Min. Yield zog (MPa) | Impact Test Temp. (degree) | Tej kev siv |
|---|---|---|---|
| NV A | 235 | +20 degree | General hull lug, bulkheads, thiab outfitting cov khoom uas tsis tshua muaj toughness. |
| NV B | 235 | 0 degree | Sab saum toj lawj qauv, coamings, thiab lwm qhov chaw ua haujlwm ntawm qhov kub thiab txias me ntsis. |
| NV D | 235 | -20 degree | Hull daim hlau sab nrauv, lub zog decks, thiab lwm qhov chaw muaj kev ntxhov siab thiab kub qis. |
| NV E | 235 | -40 degree | Siv rau polar-cov nkoj hauv chav kawm lossis cov khoom hnyav heev- cov qauv kabmob uas yuav tsum tau ua kom zoo heev qis- kub toughness. |
2. Siab-Tensile Steels (Yield Strength Ntau dua lossis sib npaug li 315 MPa)
Cov qib siab- tensile steel qib suav nrog cov lej hauv lawv qhov kev xaiv los qhia qhov tsawg kawg nkaus yield zog. Piv txwv li,32txhais tau tias qhov tsawg kawg nkaus tawm lub zog ntawm 315 MPa,36txhais tau tias 355 MPa, thiab40txhais tau tias 390 MPa.
Cov qhab nia no suav nrog cov ntawv toughness (A, D, E, F) los tsim cov npe xws li:
NV A32 / NV D32 / NV E32 / NV F32
NV A36 / NV D36 / NV E36 / NV F36
NV A40 / NV D40 / NV E40 / NV F40
Ntawm cov no,NV E 36yog ib tug heev nrhiav- tom qab ua ke ntawm siab zog thiab toughness. Nws muaj qhov tsawg kawg nkaus yield zog ntawm355 MPa rauthiab qhov ntsuas kub ntawm qhov cuam tshuam-40 degree, ua rau nws yog ib qho kev xaiv nrov rau cov nkoj loj hull cov qauv thiab qhov tseem ceeb ntawm kev sib koom ua haujlwm ntawm ntug dej hiav txwv.
3. Siab dua -Lub zog & Cov Ntawv Thov Tshwj Xeeb Qib (Ntau dua lossis sib npaug rau 420 MPa)
Raws li cov hlab ntsha loj dua thiab siab dua, qhov kev thov siab dua - cov ntaub ntawv muaj zog nce. DNV specifications npog cov qib mus txog960MPa ua. Cov ultra-siab- lub zog steels feem ntau yog siv rau hauv qhov hnyav- cov nkoj tshwj xeeb lossis cov khoom sib sib zog nqus - hiav txwv.
Feem ntau siab dua - qib zog suav nrog:
NV A420 / NV D420 / NV E420 / NV F420: Yam tsawg kawg nkaus tawm lub zog ntawm 420 MPa.
NV A460 / NV D460 / NV E460 / NV F460: Yam tsawg kawg nkaus tawm lub zog ntawm 460 MPa.
Txawm muaj zog duaQib: A500, A550, A620, A690, thiab txawmA960muaj nyob rau cov kev cai tsim tshwj xeeb.
4. Tshwj xeeb -Lub Hom Phiaj DNV Steels: Stainless Steels & Tsawg-Tub Kub Hlau
Tshaj li cov pa roj carbon steel, DNV kuj tau lees paub stainless hlau thiab npib tsib xee- alloy steels rau ib puag ncig tshwj xeeb.
Austenitic & Duplex Stainless Hlau: Feem ntau siv rau hauv cov kav dej, li qub, lub tank ballast, thiab lwm qhov chaw xav tau kev tiv thaiv corrosion siab. Feem ntau DNV- cov qib ntawv pov thawj suav nrogNV 304L, NV 316L, thiab duplex qib xws liUNS S31803thiabUNS S32205.
Tsawg-Tub kub nickel Steels: Siv nyob rau hauv LNG (Liquefied Natural Gas) cia tso tsheb hlau luam thiab cov cuab yeej ua haujlwm ntawm qhov kub thiab txias li -100℃lossis qis dua. Cov qhab-nees DNV-certified suav nrogNV 5Ni (5% nickel steel)thiabNV 9Ni (9% nickel steel) .
Cov lus sib piv ceev ntawm cov ntsiab lus tseem ceeb
Rau sab nrawm-los ntawm- sab piv, ntawm no yog cov ntsiab lus ntawm cov khoom siv kho tshuab rau qee cov qib tseem ceeb:
| Hom hlau | Qib | Min. Yield zog (MPa) | Tensile zog (MPa) | Impact Test Temp. (degree) |
|---|---|---|---|---|
| General Lub Zog | NV A | 235 | 400–520 | +20 |
| NV D | 235 | 400–520 | -20 | |
| NV E | 235 | 400–520 | -40 | |
| Siab -Tensile | NV A32 | 315 | 440–590 | +20 |
| NV E 36 | 355 | 490–620 | -40 | |
| NV A40 | 390 | 510–660 | +20 |
Yuav Ua Li Cas Xaiv Qhov Zoo DNV Qib?
Ua raws li Cov Qauv Tsim Qauv: Koj cov duab kos duab kos duab lossis kev faib cov cai hauv zej zog yuav qhia meej txog cov qib steel uas xav tau.
Txheeb xyuas qhov chaw ua haujlwm: Yog tias lub nkoj yuav taug kev siab -latitude lossis polar water, koj yuav tsum xaivQib D, E, lossis txawm Fsteels uas muaj kev cuam tshuam siab toughness kom tsis txhob muaj kev pheej hmoo tawg tawg.
Xav txog tus nqi-Kev ua tau zoo: Thaum siab - tensile steels muaj tus nqi siab dua, lawv tuaj yeem txo qhov hnyav tag nrho thiab ntim ntawm cov hlau xav tau. Kev sib xyaw ua ke ntawm cov qib sib txawv muaj zog tuaj yeem ua tauho optimize tag nrho cov nqi project.
Tau txais DNV-Certified Steel rau Koj Txoj Haujlwm Tom ntej
Seb koj xav tau qhov feem ntauNV A/B/D/E, lub siab - zog thiab siab - toughnessNV E 36, los yog tshwj xeebstainless thiab qis -kub steels, peb muabua tiav DNV-cov ntawv pov thawj steel kev daws teeb meem.
Peb tuav cov khoom lag luam dav dav thiab muaj kev sib koom tes zoo nrog cov mills loj, ua rau peb muab ntau yam ntawm DNV shipbuilding daim hlau. Peb kuj tuaj yeem muab cov kev cai ntxiv xws lilos ntawm -Thickness Properties (Z15, Z25, Z35). Tag nrho cov ntaub ntawv tuaj nrogofficial DNV zeb xeem daim ntawv pov thawj, xyuas kom tag nrho traceability thiab kev ruaj ntseg zoo.
Nrhiav rau qib tshwj xeeb, qhov loj me, lossis nqe nqe lus?
Tiv tauj peb hnub no rau ib qho - ntawm - ib qho kev qhia txog kev xaiv cov ntaub ntawv!
ib - nres kev daws teeb meem
pab neeg tshaj lij
siab zoo
Xaiv YUXIN steel pawg, thiab qhov koj yuav tsis yog cov hlau phaj nkaus xwb, tab sis kuj tseem muaj kev lav phib xaub tiav thiab muaj lub luag haujlwm.
Peb qhov chaw nyob
Tianjin, Suav
Xov tooj
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E -mail
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FAQ
01.DNV- pom zoo steel yog dab tsi, thiab vim li cas nws thiaj li tseem ceeb rau kev tsim nkoj?
02.Dab tsi yog cov ntawv (A, B, D, E) thiab cov lej (32, 36, 40) hauv DNV steel qib sawv rau?
03.Dab tsi yog qhov txawv ntawm NV E36 thiab NV A36 cov hlau tsis tu ncua, thiab kuv yuav xaiv li cas ntawm lawv?
04. Dhau li ntawm qib, dab tsi lwm yam tseem ceeb uas kuv yuav tsum xyuam xim rau thaum yuav DNV- pom zoo steel daim hlau?
Sib nrug los ntawm qib (piv txwv li, NV E36), koj yuav tsum tau ua tib zoo saib xyuas cov ntsiab lus hauv qab no kom ntseeg tau tias kev yuav khoom raug:
Dimensional Tolerances: Paub meej tias qhov tso cai sib txawv hauv thickness, dav, thiab ntev raws li koj qhov kev txiav lossis fabrication.
Los ntawm -Thickness Properties (Z-cov khoom): Yog tias lub phaj yuav tiv taus lub zog tensile nyob rau hauv cov thickness kev taw qhia (xws li, ntawm nodal pob qij txha), koj yuav tsum qhia Z15, Z25, los yog Z35 qib kom tiv thaiv lamellar tearing.
Tus me nyuam qhov xwm txheej: Qhia meej seb nws puas yog As -Rolled (AR), Tswj -Rolled (CR), Normalized (N), lossis Quenched & Tempered (QT), vim qhov no ncaj qha cuam tshuam rau qhov kawg microstructure thiab weldability.
Certification & Traceability: Ib txwm thov daim ntawv pov thawj DNV Mill Test Certificate los xyuas kom meej tias cov xov tooj cua sov thiab batch tooj sib haum nrog cov khoom siv tiag tiag, muab tag nrho traceability thoob plaws hauv cov khoom siv.
Tuam Tshoj ib qho - nres cov khoom siv hlau
Los ntawm xyoo ntawm kev nkag siab thiab nag lossis daus ntawm cov hlau, Yuxin Group tam sim no tau dhau los ua cov txheej txheem steel thiab cov chaw tsim khoom, muab ntau yam khoom rau ntau lub tuam txhab tsim kho thiab cov tuam txhab steel qauv thoob ntiaj teb. Ua tsaug rau Yuxin Group txoj kev tshaj lij thiab kev ncaj ncees, nws tau dhau los ua lub ntiaj teb - muaj npe nrov lag luam.
