Kev Piav Qhia Luv
Khoom:3.5% Nickel Qis-Kub Seamless Steel Tube - ASTM A334 Qib 3 (UNS K12021 / 3.5Ni), txias rub, normalized thiab cua txias rau seamless thiab welded carbon thiab alloy steel raj npaj rau siv ntawm qhov kub qis.
Khoom Luv Piav Qhia:Womic Steel Group tau tsim kom muaj peev xwm loj hlob, loj hlob rau cov raj me me, ntev tshaj 3.5Ni seamless - npog 25mm OD x 2mm WT x 22m ib tus neeg ntev - ua tau raws li ASTM A334 Qib 3 qhov kub qis toughness yuav tsum tau mus txog -101 ° C. Cov kab ntau lawm no hais txog keeb kwm kev cia siab rau kev xa khoom rau cov raj me me, ntev tshaj 3.5Ni. Cov hlau nickel 3.5% muab cov notch toughness thiab ductility zoo heev ntawm qhov kub qis li -150 ° F (-101 ° C), ua rau nws yog cov khoom siv tseem ceeb rau LNG terminals, ethylene cracker units, cua sib cais nroj tsuag, thiab polar projects.
Sab nraud txoj kab uas hla ntawm 10mm txog 610mm (kub-dov), phab ntsa tuab ntawm 1.5mm txog 25.4mm, ib qho ntev txog 24m. Kev kos txias precision OD ntau yam: 6mm txog 89mm, nrog rau qhov ntev nruj tolerances qis li ± 0.10mm.
Muaj kwv yees li 3.5% nickel, nrog rau cov pa roj carbon tsawg, cov nickel siab kom txhim kho qhov kub tsawg thiab tiv thaiv kev tawg ntawm qhov kub tsawg ntawm -101 ° C. Cov khoom sib xyaw ib txwm muaj: C ≤0.19%, Mn 0.31-0.64%, Si 0.18-0.37%, Ni 3.18-3.82%, P ≤0.025%, S ≤0.025%.
3.5Ni (ASTM A334 Qib 3) nyob nruab nrab ntawm cov hlau kub qis Qib 6 (-45°C) thiab cov hlau siab 9% Ni Qib 8 (-196°C). Nws yog qhov kev daws teeb meem pheej yig tshaj plaws rau -50°C txog -101°C kev pabcuam.
Ua raws li ASTM A334/A334M, ASME SA334, ASTM A333/A333M Qib 3, nrog rau ASTM/ASME, PED, thiab NACE MR0175 (thaum thov).
Cov chaw txais LNG xws li cov kav dej pabcuam, cov chav PDH (Propane Dehydrogenation), cov khoom tawg ethylene, cov chav sib cais cua, thiab cov tshuab raj xa dej hauv hiav txwv rau cov cheeb tsam polar.
Womic Steel Groupyog ib lub chaw tsim khoom tshwj xeeb thiab xa tawm thoob ntiaj teb ntawm cov raj xa dej tsis muaj qhov kub thiab txias, cov raj xa dej me me, thiab cov raj xa dej tsis muaj qhov ntev. Nrog ntau tshaj 20 xyoo ntawm kev txawj ntse kos duab txias, peb cov raj xa dej tsis muaj qhov kub -101 ° C tam sim no muaj rau kev txiav txim ntau. Daim ntawv pov thawj ntawm lub Hoobkas, 100% kev sim ultrasonic thiab hydrostatic, kev txheeb xyuas cov khoom zoo, thiab cov ntawv qhia kev tshuaj xyuas tag nrho nrog kev taug qab ib qho kub. Kev tshuaj xyuas sab nraud (SGS / BV / DNV / TÜV) txais. Tus nqi sib tw thiab kev xa khoom sai.
Ntu 1: Keeb Kwm - Vim li cas 3.5Ni Seamless Tubes ntawm -101 ° C?
Txij li xyoo 1930, thaum Tebchaws Meskas thawj zaug tsim cov hlau nickel 3.5% rau kev pabcuam kub qis (thaum kawg tau ua tus qauv raws li ASTM A334 / A334M thiab A333 / A333M), Tebchaws Europe thiab Nyiv Pooj kuj tau tsim lawv cov qib hlau 3.5Ni. Cov ntaub ntawv no tau pab dav dav rau cov khoom tawg ethylene, kev thauj mus los LPG / LNG, cov nroj tsuag chiv, kev ua roj hmab, thiab kev lag luam roj av.
Hlau 3.5Ni yog cov hlau uas muaj cov pa roj carbon tsawg, muaj cov nickel ntau thiab cov hlau tsis muaj nickel (Ni) txog li 3.5%. Los ntawm kev kho cua sov kom zoo lossis kho kom zoo thiab ua kom sov, nws muab cov qauv ferrite + bainite ruaj khov thiab muaj zog tiv taus kub tsawg. Nws yog cov khoom siv zoo, tau lees paub thoob ntiaj teb siv rau cov hlab siab thiab cov kav dej hauv qhov chaw kub qis -101 ° C.
Hauv Suav teb, cov phaj hlau 3.5Ni thiab cov khoom siv forging tau ua tiav kev tsim khoom lag luam zoo thiab txhim khu kev qha tau ntau xyoo, qhia txog kev ua haujlwm zoo heev thiab kev siv nyiaj tsawg. Txawm li cas los xij, cov raj seamless - tshwj xeeb tshaj yog cov raj me me, ntev heev 3.5Ni - tseem muaj tsawg.
Yuav kom ua tiav qhov kev lag luam no, Womic Steel tau tsim ib txoj kab ntau lawm tshwj xeeb siv nws cov peev xwm tseem ceeb hauv kev tsim cov raj seamless uas tsis kub heev, kev tsim khoom me me, thiab kev siv tshuab kos duab txias ntev. Tom qab kev txhim kho cov txheej txheem thiab kev lees paub ntau pawg, peb cov raj seamless 25mm OD x 2mm WT x 22m ntev ntxiv 3.5Ni tau nkag mus rau hauv kev tsim khoom loj, nrog rau thawj pawg xa khoom thaum lub Plaub Hlis mus rau lub tuam txhab tsim khoom siv hauv tsev loj. Cov raj yuav raug siv rau hauv qhov project Lavxias Arctic Circle.
Kev kuaj xyuas uas tau lees paub thoob tebchaws tau lees paub tias txhua qhov ntsuas kev ua tau zoo tseem ceeb - suav nrog -101 ° C qhov kub qis Charpy qhov tawv, cov khoom tensile hauv chav sov, qhov tseeb ntawm qhov ntev, thiab qhov tiav ntawm qhov chaw - ua tau raws li ASTM A334 Qib 3 cov kev cai thiab sib piv tau zoo rau cov qib siab thoob ntiaj teb.
Ntu 2: Kev Tshuaj Xyuas Qib Sib Piv - Xaiv Cov Hlau Uas Kub Qis Tshaj Plaws
Cov kav dej hlau tsis muaj hlau sib xyaw ua ke rau qhov chaw kub tsawg feem ntau suav nrog ASTM A333/A334 Qib 3, 4, 6, 7, 8, 9, thiab 11. Ntawm lawv, Qib 3, 4, 7, thiab 8 yog cov feem ntau teev tseg rau kev pabcuam kub nruab nrab thiab hnyav. Kev xaiv cov khoom siv tsim nyog nyob ntawm qhov kub tsawg kawg nkaus uas xav tau, siab tsim, thiab peev nyiaj.
Cov lus hauv qab no qhia txog kev sib piv ntawm cov hlau qib qis uas siv tau rau qhov kub thiab txias, suav nrog lawv cov qib kub thiab txias, cov khoom siv kho tshuab (tensile thiab yield strength), thiab cov ntawv thov tseem ceeb. Kev sib piv no yuav pab qhia meej txog txoj haujlwm ua lag luam ntawm 3.5Ni hlau (ASTM A334 Qib 3) piv rau lwm cov ntaub ntawv.
Rooj: ASTM A333/A334 Kev Sib Piv Qib Hlau Kub Qis
| Kev Xaiv Qib | Qhov Kub Pab Tsawg Kawg Nkaus | Ni Cov Ntsiab Lus | Lub zog Tensile (min) | Lub Zog Tawm (min) | Kev ntev | Hom & Cov Ntawv Thov Tseem Ceeb |
|---|---|---|---|---|---|---|
| Qib 6 | -45°C (-50°F) | ≤0.5% | ≥415 MPa | ≥240 MPa | ≥30% | Cov Hlau Manganese Uas Muaj Cov Pa roj Carbon Tsawg. Qib siv ntau tshaj plaws thiab pheej yig. Kev kho dej, kev txias dav dav, thiab cov kav dej txias. |
| Qib 3 (3.5Ni) | -101°C (-150°F) | 3.18-3.82% | ≥450 MPa | ≥240 MPa | ≥30% (L) / ≥20% (T) | 3.5% Nickel Steel. Tsim nyog rau -50°C txog -101°C. Cov chav PDH, cov nroj tsuag ethylene, cov chav cais cua, cov kav dej Arctic. |
| Qib 4 | -101°C (-150°F) | ≤0.5% | ≥415 MPa | ≥240 MPa | ≥30% | Cov Hlau Carbon uas raug tua. Cov qauv matrix uas muaj me ntsis ferrite. Kev tawv tsis tshua muaj zog thaum kub tsawg piv rau 3.5Ni. |
| Qib 7 | -73°C (-100°F) | 2.0-2.5% | ≥450 MPa | ≥240 MPa | ≥30% | 2.5% Nickel Steel. Kev xaiv nruab nrab ntawm Qib 6 thiab Qib 3. |
| Qib 8 (9Ni) | -196°C (-320°F) | 8.4-9.6% | ≥690 MPa | ≥515 MPa | ≥22% | 9% Nickel Steel. Zoo heev rau qhov kub qis thiab txias heev. LNG cov kav dej loj (-162°C). |
| Qib 11 (Kev Ruaj Khov Siab) | -196 ° C. Zoo ib yam li Gr.8 | Zoo ib yam li Gr.8 | Zoo ib yam li Gr.8 | Zoo ib yam li Gr.8 | Zoo ib yam li Gr.8 | Ua los ntawm cov hlau tua zoo, siv rau cov khoom tseem ceeb uas tsis kub heev. |
Tshooj 3: Cov Tshuaj Lom Zem - Kev Tswj Xyuas Kom Zoo rau ASTM A334 Qib 3 Kev Ua Raws Cai
Los ntawm kev paub dhau los thiab kev ua pov thawj nrog 3.5Ni steel phaj thiab cov raj kub-kub seamless, Womic Steel tau tsim cov tshuaj lom neeg tswj hwm nruj nreem rau cov txheej txheem raj me me uas txias-dov. Qhov no ua kom muaj kev tawv nqaij zoo dua thaum tsis kub thiab tswj tau qhov ruaj khov ntawm kev tsim khoom txias-dov.
| Khoom | ASTM A334 Qib 3 (Qhov Siab Tshaj / Xav Tau) | Womic Steel Design Target | Kev Tshuaj Xyuas Lub Ladle Hlau Womic |
|---|---|---|---|
| Cov pa roj carbon (C) | ≤0.19% | 0.06 – 0.09% | 0.07% |
| Silicon (Si) | 0.18 – 0.37% | 0.18 – 0.33% | 0.24% |
| Manganese (Mn) | 0.31 – 0.64% | 0.45 – 0.60% | 0.51% |
| Phosphorus (P) | ≤0.025% | ≤0.010% | 0.004% |
| Sulfur (S) | ≤0.025% | ≤0.005% | 0.001% |
| Nickel (Ni) | 3.18 – 3.82% | 3.30 – 3.70% | 3.40% |
*Kev sib xyaw ua ke ntawm cov pa roj carbon tsawg (C ≤0.19%), phosphorus thiab sulfur tsawg heev (P ≤0.025%, S ≤0.025%), thiab kev ntxiv nickel 3.18-3.82% kom meej meej tshem tawm qhov kev pheej hmoo ntawm qhov kub qis embrittlement ntawm -101 ° C, thaum ua tau raws li ASTM A334 Gr.3 cov kev cai tshuaj lom neeg thiab kev kho tshuab thiab ua kom ntseeg tau tias ua haujlwm tau zoo heev thaum lub sijhawm kos duab.*
Tshooj 4: Cov Khoom Siv Kho Tshuab - Kev Ua Raws Cai ASTM A334 Qib 3 Uas Tau Pom Zoo
Cov khoom siv kho tshuab tau sim rau ntawm ob lub raj mis niam (tag nrho cov phab ntsa tuab) thiab lub raj mis tiav lawm (qhov chaw) tom qab kev kho cua sov zoo ib yam, nrog rau cov qauv coj los ntawm cov khoom tsim tawm ib txwm muaj.
Cov Khoom Siv Tensile Kub Hauv Chav
| Vaj tse | ASTM A334 Gr.3 Qhov Yuav Tsum Tau Ua | Womic Steel Tseeb (Kev Tsim Khoom Tsis Tu Ncua) |
|---|---|---|
| Lub Zog Tawm (0.2% offset) | ≥240 MPa | 330 – 360 MPa |
| Lub zog tensile | ≥450 MPa | 520 – 550 MPa |
| Kev ntev (ntev) | ≥30% | 32 – 36% |
| Kev ntev (transverse) | ≥20% | 26 – 30% |
| Qhov nyuaj (HB) | ≤190 | 160 – 175 |
Cov Qauv Metallographic
Tom qab ua kom sov li qub ntawm ≥845 ° C ua raws li cua txias, lub raj tiav lawm tau pom tias muaj cov qauv ferrite + bainite zoo nrog qhov ntsuas qhov loj ntawm cov noob kwv yees li ASTM No. 10 (cov noob ua kom zoo heev), uas ua rau muaj kev tawv nqaij zoo dua hauv qhov kub qis.
-101 ° C Kub Qis Charpy Impact Toughness
Vim tias kev sim cuam tshuam ncaj qha ntawm lub raj nyias-phab ntsa tiav lawm (25x2mm) tsis tuaj yeem ua tau raws li cov qauv kev coj ua (qauv me dhau), Womic Steel tau coj cov qauv raj niam ntawm tib tus lej kub, muab lawv rau hauv kev kho cua sov zoo ib yam li cov raj tiav lawm, thiab tom qab ntawd tshuab lawv rau hauv cov qauv me me 2.5x10x55mm Charpy V-notch. Kev sim cuam tshuam tau ua tiav ntawm qhov kub qis dua ntawm -117 ° C, tshaj qhov yuav tsum tau tsim -101 ° C, los qhia txog qhov kev nyab xeeb txaus.
| Kub Ntsuas | Qauv 1 | Qauv 2 | Qauv 3 | ASTM Qhov Yuav Tsum Tau Ua (2.5 hli me me) |
|---|---|---|---|---|
| -117°C | 32J | 33J | 35J | Qhov nruab nrab tsawg kawg nkaus ≥5J; ib qho ≥4J |
Cov txiaj ntsig ntawm kev sim cuam tshuam ntau dua li qhov yuav tsum tau ua ntawm ASTM, qhia tau tias cov khoom siv no muaj zog heev thaum kub qis nrog rau kev nyab xeeb ntau dhau qhov ntsuas kub -101 ° C.
Tshooj 5: Cov Txheej Txheem Tsim Khoom - Kev Kos Duab Txias thiab Kev Kho Mob Kub rau Cov Raj Me Me Ntev Ntev
Womic Steel tsim cov raj xa dej kub qis 3.5Ni siv txoj kev tsim khoom lag luam tag nrho uas tau tsim tshwj xeeb rau cov khoom me me, ntev ntxiv, thiab cov khoom tiav saum npoo siab:
- Hluav Taws Xob Arc Rauv Melting + Ladle Refining + Nqus Degassing:Xyuas kom meej tias cov hydrogen, oxygen, thiab nitrogen tsawg heev, nrog rau kev tswj hwm tshuaj lom neeg nruj (P ≤0.005%, S ≤0.001%).
- Kev Nruam Nruam + Kev Dov Paj:Tsim cov qhov zoo ntawm cov raj xa dej nrog lub zog sab hauv zoo.
- Kev tho qhov kub (Kev tho qhov hla):Cov hlau billets raug cua sov hauv lub cub tawg uas taug kev thiab tho rau hauv cov plhaub phab ntsa hnyav ntawm qhov kub dov zoo tshaj plaws; qhov eccentricity raug txo kom tsawg.
- Kev Sib Tw Txias / Kev Kos Duab Txias– Dhau ntau zaus (nrog rau kev ua kom sov nruab nrab): Qhov no yog cov txheej txheem tseem ceeb rau kev ua tiav cov raj ntev heev. Rau qhov loj kawg 25x2 hli, cov txheej txheem feem ntau yuav tsum tau peb zaug dhau los ntawm kev kos duab txias uas tswj tau zoo, nrog rau txhua zaus dhau los ua kom cov khoom siv tawv. Nruab nrab ntawm cov kev dhau los, cov raj yuav dhau los ntawm kev ua kom sov nruab nrab kom rov qab ua kom yooj ywm thiab tiv thaiv kev tawg ntawm kev ua haujlwm tawv.
- Kev Ua Kom Cov Tshuaj Kub (Normalizing):Nqa tawm hauv lub cub tawg tswj hwm huab cua ntawm ≥845 ° C, ua raws li cua txias kom txo qhov kev ntxhov siab ua haujlwm txias thiab ua kom zoo dua cov qauv me me.
- Kev Ncaj Ncees:Kev ncaj ncaj rau cov menyuam ua kom ntseeg tau tias qhov ncaj ncaj ntawm ≤1.5mm ib 'meter'.
- Txiav mus rau Qhov Ntev thiab Qhov Kawg Ua tiav:Cov tshuab txiav ya ua tiav qhov kev txiav siab; cov kawg yog deburred lossis beveled raws li qhov xav tau.
- 100% NDT, Kev Ntsuas Hydrostatic, thiab Kev Cim:Txhua lub raj yog kuaj ultrasonically, eddy tam sim no kuaj, thiab siab kuaj ua ntej qhov kawg qis kev ntxhov siab stamping.
- Qhov kawg tau txais:24.96 – 25.05mm OD × 2.04 – 2.16mm WT × 22m ntev. ID thiab OD qhov roughness ntawm qhov chaw ≤1.4μm Ra, ua tau raws li Qib 1 lub raj xa cua sov zoo ib yam li NB/T 47019.1-2021 (qhov chaw tiav hauv sub micrometer).
Tshooj 6: Kev Tswj Xyuas Zoo thiab Kev Ntsuas - Kev Txheeb Xyuas Kev Ua Haujlwm Tag Nrho
Txhua pawg ntau lawm ntawm 3.5Ni cov raj xa dej kub qis seamless raug kuaj xyuas raws li ASTM A334/A334M: 2021 cov qauv.
Daim Ntawv Pov Thawj:Daim Ntawv Pov Thawj Xeem Zeb raws li EN 10204 Hom 3.1. Hom 3.2 nrog tus neeg tim khawv thib peb (SGS/BV/DNV/TÜV) muaj thaum thov.
Kev sib xws ntawm pawg mus rau pawg:Womic Steel khaws cov ntaub ntawv qhia txog txhua tus lej cua sov thiab txhua pawg, kom ntseeg tau tias muaj kev taug qab tag nrho ntawm txhua lub raj tiav lawm.
Tshooj 7: Daim Ntawv Thov - Qhov twg 3.5Ni ASTM A334 Qib 3 Cov Raj Excel
Cov raj xa dej 3.5Ni uas tsis kub heev yog tsim los rau kev ua haujlwm ntev thiab txhim khu kev qha hauv qhov kub ntawm -45 ° C txog -101 ° C, ua kom tiav qhov sib txawv ntawm cov khoom siv qib 6 thiab cov khoom siv kim 9% Ni qib 8.
Lub raj 3.5Ni ua haujlwm ua qhov kev xaiv khoom siv pheej yig tshaj plaws rau qhov kub thiab txias ntawm -50 ° C (Qib 6) thiab -196 ° C (9% Ni Qib 8), ua rau nws yog qhov kev daws teeb meem zoo tshaj plaws rau feem ntau ntawm cov ntawv thov petrochemical qis-kub.
Tshooj 8: Vim li cas ho xaiv Womic Steel rau 3.5Ni Low-Kub Seamless Tubes?
Cov Lus Nug Feem Ntau (FAQ)
Tiv tauj Womic Steel
Yog tias koj muaj lus nug, kev pab txog kev siv tshuab, lossis yog xav tau tus nqi rau koj cov raj xa dej kub qis 3.5Ni raws li ASTM A334 Qib 3 (lossis lwm yam qib kub qis), thov hu rau peb ncaj qha.
Lub sijhawm tshaj tawm: Lub Rau Hli-24-2026