1. Q: Cov tshuaj muaj pes tsawg leeg thiab qhov sib txawv tseem ceeb ntawm Ni200 (UNS N02200) thiab Ni201 (UNS N02201) npib tsib xee yog dab tsi?
A:Ni200 (UNS N02200) thiab Ni201 (UNS N02201) yog cov khoom lag luam ntshiab wrought npib tsib xee alloys, nrog rau qhov sib txawv yog lawv cov ntsiab lus carbon. Qhov zoo li qhov sib txawv me me no muaj qhov cuam tshuam loj rau kev siv siab - kub.
Tshuaj muaj pes tsawg leeg:
| Element | Ni200 (UNS N02200) | Ni201 (UNS N02201) |
|---|---|---|
| Nickel (ntxiv rau Cobalt) | 99.0% yam tsawg kawg nkaus | 99.0% yam tsawg kawg nkaus |
| Cov pa roj carbon | 0.15% siab tshaj | 0.02% siab tshaj |
| Hlau | 0.40% siab tshaj | 0.40% siab tshaj |
| Manganese | 0.35% siab tshaj | 0.35% siab tshaj |
| Silicon | 0.35% siab tshaj | 0.35% siab tshaj |
| Sulfur | 0.01% siab tshaj | 0.01% siab tshaj |
Qhov txawv ntawm qhov tseem ceeb: Cov ntsiab lus carbon
Cov pa roj carbon specification yog qhov sib txawv ntawm ob qib no:
200 Nws:Cov pa roj carbon ntau tshaj 0.15%. Cov ntsiab lus siab dua cov pa roj carbon monoxide no muab lub zog siab dua me ntsis hauv cov txheej txheem annealed tab sis ua rau cov hlau tsis muaj zoggraphitizationntawm qhov kub thiab txias.
Xyoo 201:Cov pa roj carbon ntau tshaj 0.02%. Qhov qis- carbon variant tau tsim tshwj xeeb los kov yeej qhov teeb meem graphitization, ua kom muaj kev ruaj khov ntawm qhov kub siab dua.
Graphitization Phenomenon:
Thaum Ni200 raug rau qhov kub thiab txias nruab nrab ntawm300℃thiab 600℃(572℃F txog 1112℃F)rau ncua sij hawm ntev, cov pa roj carbon tam sim no nyob rau hauv cov hlau tuaj yeem precipitate li graphite particles ntawm grain ciam teb. Cov nag lossis daus no ua rau cov khoom siv, ua rau muaj kev puas tsuaj loj hauv kev ntxhov siab. Ni201, nrog nws cov ntsiab lus tsis tshua muaj carbon tsawg, zoo li tshem tawm qhov kev pheej hmoo no.
Mechanical Properties (Annealed Condition):
| Khoom | Ni 200 | Ni 201 |
|---|---|---|
| Tensile zog | 55-80 ksi (380-550 MPa) | 55-80 ksi (380-550 MPa) |
| Yield zog (0.2% offset) | 15-40 ksi (105-275 MPa) | 15-40 ksi (105-275 MPa) |
| Elongation (hauv 2 nti) | 40–50% | 40–50% |
| Hardness (Rockwell B) | 45–75 | 45–75 |
Daim ntawv qhia kev:
200 Nws:Haum rau cov ntawv thov qis dua 600℃F (315 degree), suav nrog cov khoom siv hluav taws xob, cov roj teeb tiv tauj, cov khoom siv ua zaub mov, thiab chav-kub caustic tuav.
Xyoo 201:Yuav tsum tau txais kev pabcuam kub siab tshaj 600℃F (315 degree), suav nrog cov khoom siv tshuaj ua haujlwm tuav cov dej qab zib kub, siab - kub exchangers, thiab cov khoom siv hauv cov khoom siv hluavtaws.
Rau cov ntawv thiab cov khoom siv phaj, qhia cov qib kom raug raws li qhov siab tshaj qhov kev pabcuam kub yog qhov tseem ceeb los xyuas kom meej ntev -cov ntaub ntawv ruaj khov.
2. Q: Dab tsi yog cov ntsiab lus tseem ceeb tswj hwm Ni200 thiab Ni201 npib tsib xee daim ntawv thiab phaj?
A:Ni200 thiab Ni201 daim ntawv thiab phaj yog tswj hwm los ntawm ntau yam ASTM thiab ASME specifications, nyob ntawm seb cov khoom tsim thiab cov kev pab cuam npaj. Kev nkag siab txog cov kev qhia tshwj xeeb no yog qhov tseem ceeb rau kev yuav khoom kom raug thiab ua raws.
Thawj Specifications:
| Specification | Title | Cov Qib uas siv tau |
|---|---|---|
| ASTM B 162 | Standard Specification rau Nickel Phaj, Sheet, thiab Sawb | UNS N02200 (Ni200), UNS N02201 (Ni201) |
| ASME SB-162 | ASME Boiler thiab Pressure Vessel Code version | UNS N02200, UNS N02201 |
| ASTM B906 | General Requirements rau Nickel Alloy Phaj, Sheet, thiab Sawb | Tag nrho cov nickel alloys |
| TIAB SA 5550 | Aerospace Khoom Specification rau Nickel Sheet (Ni200) | UNS N02200 |
| TIAB SA 5553 | Aerospace Khoom Specification rau Nickel Sheet (Ni201) | UNS N02201 |
ASTM B162 Cov Lus Qhia:
ASTM B162 qhia txog cov cai hauv qab no rau cov ntawv nickel thiab phaj:
| Kev xav tau | Ni200 (N02200) | N201 (N02201) |
|---|---|---|
| Cov pa roj carbon | 0.15% max | 0.02% max |
| Tensile zog | 55 ksi min (380 MPa) | 55 ksi min (380 MPa) |
| Yield zog | 15 ksi min (105 MPa) | 15 ksi min (105 MPa) |
| Elongation (2 nti) | 40% min | 40% min |
| Kev kho cua sov | Annealed (1300-1600℃F) | Annealed (1300-1600℃F) |
Cov Khoom Muag Khoom thiab Tolerances:
Daim ntawv:Thickness ntawm 0.005 nti (0.13 hli) txog 0.1875 nti (4.76 hli). Dav feem ntau 24-48 ntiv tes (610-1219 mm).
Phaj:Thickness ntawm 0.1875 nti (4.76 mm) thiab ntau dua. Dav feem ntau 48-96 ntiv tes (1219-2438 mm).
Sawb:Thickness ntawm 0.005 nti (0.13 hli) txog 0.1875 nti (4.76 hli), nqaim dav dua li daim ntawv.
Nto Finishes:
ASTM B162 tso cai rau ntau qhov chaw tiav:
Kub-Rolled, Annealed, thiab Pickled:Txheem rau phaj thiab cov ntawv hnyav dua
Txias-Rolled, Annealed, thiab Pickled:Standard rau daim ntawv thiab sawb
Bright Annealed:Rau daim ntawv thov xav tau ib tug huv, reflective nto
Polished:Rau kev ua kom zoo nkauj lossis kev pabcuam huv
ASME Code Ua raws:
Rau kev siv lub nkoj siab, cov khoom siv yuav tsum ua raws li ASME SB-162 thiab raug ntaus nrog ASME Code cim. ASME Tshooj VIII, Division 1 tso cai rau kev siv Ni200 thiab Ni201 txog 600℃F (315 degree) rau Ni200 thiab mus txog 800℃F (427 degree) rau Ni201, muab kev tsim kom raug kev ntxhov siab raug siv.
Rau kev yuav khoom, qhia qhov tseeb ASTM lossis ASME tus qauv nrog rau qib qib (UNS N02200 lossis UNS N02201) ua kom tau txais cov khoom siv nrog cov ntsiab lus carbon tsim nyog thiab cov khoom siv kho tshuab rau cov kev pabcuam npaj.
3. Q: Vim li cas cov ntawv ntshiab npib tsib xee (Ni200/Ni201) yog cov khoom siv rau kev tuav cov dej qab zib caustic (NaOH) hauv kev ua tshuaj?
A:Ntshiab npib tsib xee nthuav tawm ib qho tshwj xeeb electrochemical passivity nyob rau hauv concentrated caustic soda (sodium hydroxide) ib puag ncig uas tsis sib xws los ntawm stainless hlau, tooj liab alloys, los yog ntau nickel-raws li superalloys. Cov cuab yeej no tau tsim Ni200 thiab Ni201 ua cov khoom siv rau cov khoom siv caustic.
Mechanism ntawm Caustic Resistance:
Ntshiab npib tsib xee tsim ib qho chaw ruaj khov, tiv thaiv oxide zaj duab xis (feem ntau yog npib tsib xee oxide, NiO) ntawm nws qhov chaw nyob hauv ib puag ncig caustic. Zaj movie no yog:
Self- kho tus kheej:Yog hais tias mechanically puas, nws sai hloov nyob rau hauv lub xub ntiag ntawm caustic
Stable nyob rau hauv ib tug dav concentration ntau yam:Siv tau los ntawm dilute mus rau 100% caustic
Resistant rau caustic embrittlement:Tsis zoo li carbon steel thiab stainless hlau, ntshiab nickel tsis raug kev nyuaj siab -corrosion cracking (SCC) hauv caustic media
Kev sib piv kev ua haujlwm:
| Khoom siv | Kuj rau Caustic ntawm 50% NaOH, 200℃F | Hom kev ua tsis tiav |
|---|---|---|
| Ni200/Ni201 | Zoo heev (0.001–0.005 ipy) | Tsis muaj -passive |
| 316L Stainless hlau | pluag | Kev ntxhov siab -corrosion tawg hauv lub lis piam |
| Carbon Steel | txwv | Caustic embrittlement, general corrosion |
| Tooj Alloys | pluag | Ceev ceev dav dav corrosion |
Hom Caustic Processing Applications:
| Khoom siv | Qib Xaiv | Kev Pabcuam |
|---|---|---|
| Caustic Evaporators | Ni 201 | 50-73% NaOH, 250-350℃F, nqus tsev vacuum |
| Caustic Concentrators | Ni 201 | 73-98% NaOH, 350-600℃F |
| Caustic Cia Tank | Ni 200 | 50% NaOH, ambient kub |
| Thaum tshav kub kub Exchangers (caustic sab) | Ni 201 | Kev sib txawv concentration, siab kub |
| Piping thiab Fittings | Ni200/Ni201 | Raws li qhov kub thiab txias |
| Pump thiab Valve Cheebtsam | Ni200/Ni201 | Seaworthy rau kev pabcuam caustic |
Kev txwv kub:
Ni200 (0.15% max C):Haum rau kev pabcuam caustic mus txog600℃F (315 degree). Tshaj qhov kub no, qhov kev pheej hmoo ntawm graphitization nce.
Ni201 (0.02% max C):Haum rau kev pabcuam caustic mus txog800℃F (427 degree)thiab tshaj, nyob ntawm qhov siab thiab concentration. Qhov qis - cov ntsiab lus carbon tshem tawm graphitization txaus ntshai.
Chlor-Alkali Kev Lag Luam:
Hauv kev lag luam chlor-alkali, uas tsim cov tshuaj chlorine, caustic soda, thiab hydrogen los ntawm electrolysis, npib tsib xee ntshiab yog cov khoom tsim los rau:
Caustic evaporators thiab concentrators
Caustic cia thiab hloov tshuab
Thaum tshav kub kub exchangers tuav kub caustic cawv
Rau cov ntawv thov no, Ni201 yuav luag thoob plaws ntiaj teb tau teev tseg vim qhov ua haujlwm siab kub (feem ntau 300-400℃F) thiab lub peev xwm rau qhov kub thiab txias excursions uas yuav embrittle Ni200.
4. Q: Dab tsi yog qhov tseem ceeb rau kev vuam thiab fabricating Ni200 / Ni201 npib tsib xee daim ntawv?
A:Ntshiab npib tsib xee daim ntawv qhia zoo weldability thiab fabricability, tab sis nws cov cim metallurgical yam ntxwv yuav tsum tau tshwj xeeb mloog thaum lub sij hawm vuam thiab kev ua hauj lwm.
Welding Considerations:
Kev xaiv txheej txheem:
Gas Tungsten Arc Vuam (GTAW/TIG):Txaus siab rau daim ntawv nyias (txog 0.125 nti)
Gas Metal Arc Vuam (GMAW/MIG):Haum rau cov ntu tuab
Shielded Hlau Arc Vuam (SMAW):Siv rau thaj chaw vuam thiab cov phaj hnyav dua
Filler Hlau Xaiv:
Qhov pom zoo muab tub lim hlau yogERNi-1(AWS A5.14), which matches the composition of the base metal. ERNi-1 muab:
Sib piv corrosion kuj
Zoo ductility nyob rau hauv raws li -welded mob
Compatibility nrog Ni200 thiab Ni201
Ua ntej- Weld Preparation:
| Kev xav tau | Paub meej |
|---|---|
| Ntxuav | Txhuam degreasing nrog acetone los yog haum hnyav. Ntshiab nickel yog rhiab heev rau sulfur, lead, thiab phosphorus paug. |
| Kev npaj nto | Tshem tawm cov oxides saum npoo los ntawm kev tu txhua yam (sib tsoo) lossis pickling. |
| Cov cuab yeej tshwj xeeb | Siv cov txhuam hlau thiab cov log sib tsoo rau cov nickel alloys los tiv thaiv kev sib kis -. |
| Ntug Kev Npaj | Tshuab los yog zom cov npoo; sheared npoo tej zaum yuav xav tau kev ntxuav ntxiv. |
Thaum tshav kub kub input Control:
| Parameter | Kev pom zoo |
|---|---|
| Kub Input | Tsawg mus rau nruab nrab; tsis txhob kub dhau |
| Interpass Temperature | Hauv qab 200℃F (93 degree) |
| Cov txheej txheem | Stringer hlaws; tsis txhob weaving uas tuaj yeem txhawb kev tawg kub |
| Tiv thaiv | Ntshiab argon rau GTAW; rov qab - yuav tsum tau tshem tawm cov hauv paus hla |
Ncej -Kev kho cua sov:
Cov ntawv thov feem ntau: Raws li -welded condition yog txais
Rau kev pabcuam corrosive hnyav: Kev ntxhov siab ntawm 1000–1100℃F (540–595 degree) tej zaum yuav muaj txiaj ntsig
Rau siab tshaj plaws corrosion kuj: Tag nrho annealing ntawm 1300-1600℃F (705-870 degree) nrog ceev ceev
Kev tsim cov kev txiav txim siab:
| Kev ua haujlwm | Kev txiav txim siab |
|---|---|
| Txias txoj kev | Ni200/Ni201 ua haujlwm- tawv sai heev. Rau cov duab complex, intermediate annealing yuav tsum tau. |
| Daim duab sib sib zog nqus | Zoo heev ductility nyob rau hauv annealed mob; siv cov- zoo lubricants los tiv thaiv galling. |
| Khoov | Yam tsawg kawg khoov vojvoog nyob ntawm thickness; 1T-2T yog nyob rau hauv annealed mob. |
| Khiav | Feem ntau siv los ua cov ntawv npib tsib xee rau hauv lub taub hau tank thiab cones. |
Common Fabrication Challenges:
| Kev sib tw | Kev txo qis |
|---|---|
| Galling | Siv cov roj zoo- zoo; tswj cov cuab yeej ntse |
| Ua Haujlwm Hardening | Intermediate anneals rau multi-theem forming |
| Kev kis kab mob | Cov cuab yeej tshwj xeeb; huv si ua ntej welding |
| Distortion | High thermal expansion yuav tsum tau ceev faj fixturing |
Rau cov neeg tsim khoom, cov txheej txheem vuam tsim nyog raws li ASME Tshooj IX lossis cov qauv siv tau yog qhov tseem ceeb. Kev sib xyaw ua ke ntawm cov hlau ua kom zoo, tswj cov khoom siv hluav taws xob, thiab kev tu kom huv kom ntseeg tau tias cov khoom siv nickel welded ua tiav lub neej ua haujlwm ntev uas yuav tsum tau muaj nyob rau hauv caustic thiab lwm qhov chaw corrosive.
5. Q: Cov ntawv pov thawj zoo thiab cov kev xav tau ntawm Ni200 / Ni201 npib tsib xee yog dab tsi?
A:Kev yuav khoom ntawm siab- zoo Ni200 thiab Ni201 npib tsib xee daim ntawv yuav tsum tau ua tib zoo saib xyuas cov lus qhia tshwj xeeb, ntawv pov thawj, thiab cov khoom siv taug qab kom ntseeg tau tias ua tau raws li kev lag luam.
Cov ntaub ntawv pov thawj (Mill Test Report):
MTR yuav tsum muaj ntaub ntawv:
| Element | Kev xav tau |
|---|---|
| Specification | ASTM B162 (los yog ASME SB-162) nrog qib (N02200 lossis N02201) |
| Kev Ntsuas Kub | Ua kom tiav cov tshuaj muaj pes tsawg leeg suav nrog carbon (Tsawg dua lossis sib npaug rau 0.15% rau Ni200; Tsawg dua lossis sib npaug rau 0.02% rau Ni201) |
| Mechanical Properties | Tensile zog (55 ksi min), yield zog (15 ksi min), elongation (40% min) |
| Kev kho cua sov | Annealing cov ntsiab lus (qhov kub thiab txias, txoj kev txias) |
| Qhov ntev | Thickness, dav, ntev |
Traceability Requirements:
Thaum tshav kub kub naj npawb:Txhua daim ntawv lossis phaj yuav tsum tau cim nrog tus lej xov tooj cua sov tuaj yeem nkag mus rau MTR
Specification Marking:ASTM B162 / ASME SB-162, qib kev xaiv
Hloov Kos Npe:Cov cim yuav tsum tau pauv mus rau qhov txiav
Surface Finish Options:
| Ua kom tiav | Kev piav qhia | Daim ntawv thov |
|---|---|---|
| Kub-Rolled, Annealed & Pickled | Matte tiav, nplai tshem tawm | Phaj rau cov hlab ntsha |
| Txias-Rolled, Annealed & Pickled | Smooth, uniform tiav | General daim ntawv thov |
| Bright Annealed | Reflective, huv si | Cov khoom siv hluav taws xob, kev ua zaub mov |
| Polished | Daim iav tiav | Kho kom zoo nkauj, kev pabcuam huv |
Dimensional kev txiav txim siab:
| Yam khoom | Thickness Ntau | Hom dav |
|---|---|---|
| Daim ntawv | 0.005–0.1875 nti (0.13–4.76 hli) | 24-48 nti (610-1219 hli) |
| Phaj | 0.1875–{1}} ntiv tes (4.76–{3}} mm) | 48-96 nti (1219-2438 hli) |
| Sawb | 0.005–0.1875 nti (0.13–4.76 hli) | Mus txog 24 nti (610 mm) |
Thib peb-Kev soj ntsuam tog:
Rau cov ntawv thov tseem ceeb, kev tshuaj xyuas ntxiv yuav suav nrog:
Positive Material Identification (PMI):Kev txheeb xyuas ntawm alloy muaj pes tsawg leeg thaum tau txais
Kev kuaj ultrasonic:Rau phaj thicknesses tshaj 0.5 ntiv tes txhawm rau txheeb xyuas qhov tsis sib xws
Kev kuaj Hardness:Kev txheeb xyuas qhov mob annealed
Dimensional soj ntsuam:Kev pom zoo ntawm thickness, flatness, thiab ntug mob
Daim ntawv txheeb xyuas khoom:
Thaum yuav khoom Ni200/Ni201 nickel ntawv:
Qhia kom tiav Standard:ASTM B162 UNS N02200 lossis ASTM B162 UNS N02201
Txhais kev kho cua sov:Annealed mob (tus qauv rau daim ntawv thiab phaj)
Qhia kom meej Surface Finish:Pickled, ci annealed, los yog polished raws li xav tau
Yuav tsum tau MTR nrog Kev Xa Khoom:Tag nrho traceability rau cua sov tooj
Xav txog ASME Code:Qhia rau ASME SB-162 rau kev siv lub nkoj siab
Tsim Tau Txais Kev Tshawb Fawb:suav nrog PMI pov thawj rau cov ntawv thov tseem ceeb
Cov Nqi Them Nqi:
| Qhov xwm txheej | Kev cuam tshuam |
|---|---|
| Qib | Ni201 feem ntau hais kom tus nqi tshaj Ni200 vim qis carbon specification |
| Thickness | Daim ntawv nyias nyias (<0.010 inches) carries higher per-pound cost |
| Nto tiav | Bright annealed thiab polished tiav ntxiv cov nqi ua haujlwm |
| Ntau | Cov xaj loj dua tau txais txiaj ntsig los ntawm kev lag luam ntawm nplai |
| Daim ntawv pov thawj | ASME Code{0}}cov ntaub ntawv pov thawj tuaj yeem nqa tus nqi them |
Kev ceeb toom tseem ceeb:
Rau cov ntawv thov uas xav tau kev pabcuam kub siab (siab dua 600℃F / 315 degree), nws yog ib qho tseem ceeb uas yuav tsum tau qhia.Ni201 (UNS N02201)tsis yog Ni200. Kev siv Ni200 saum toj no qhov ntsuas kub yuav ua rau graphitization embrittlement, uas tuaj yeem ua rau muaj kev puas tsuaj loj. Tus nqi nce ntxiv ntawm Ni201 yog qhov tsawg dua piv rau qhov kev pheej hmoo ntawm kev ua tsis tiav ntxov ntawm kev ua tshuaj lom neeg tseem ceeb, kev ua zaub mov, lossis cov khoom siv kub siab tshaj -.
Rau cov neeg yuav khoom, nrhiav los ntawm cov tuam txhab tsim khoom thiab cov chaw muag khoom muaj npe nrov nrog cov ntaub ntawv zoo ua kom ntseeg tau tias Ni200 thiab Ni201 cov khoom lag luam ua tau raws li qhov yuav tsum tau ua thiab xa cov kev ua tau zoo uas tau ua lag luam ntshiab npib tsib xee tus qauv cov khoom siv rau caustic tuav, hluav taws xob siv, thiab siab - kub ua rau ntau tshaj ib puas xyoo.
