Ob qib no -UNS S31000 thiab UNS S31008- zaum ntawm lub workhorse kawg ntawm tshav kub-resistant austenitic stainless hlau tsev neeg. Lawv tsis txawv. Tab sis qhov sib txawv ntawm lub qhov dej - tshwj xeeb S310S yeeb nkab uas kav ib xyoo caum thiab ib qho khoom siv tsis zoo uas ua tsis tau zoo hauv kaum plaub lub hlis los txiav txim siab feem ntau cov ntawv tshwj xeeb yeej tsis nyob.
Peb muab txhua yam sib txawv thiab ntsuas ntawm cov kav dej, flange, phaj, yeeb nkab fittings thiab round bar. Thov koj txhob xav li castiv tauj pebrau cov lus qhia ntxiv txog cov khoom thiab tus nqi.
Cov Khoom Muag Khoom
Bar & Rod
Phaj & Ntawv
Coil & Sawb
Tube & Tube
Haum: Flange, Tee, Luj Tshib, Reducer thiab lwm yam.
Forging: Nplhaib, Ncej, Vajvoog, Thaiv thiab lwm yam.
| Qhov xwm txheej | S310 (UNS S31000) | S310S (UNS S31008) |
|---|---|---|
| Cov ntsiab lus carbon | Tsawg dua lossis sib npaug li 0.25% | Tsawg dua lossis sib npaug li 0.08% |
| EN npe | 1.4841 (X15CrNiSi25-21) | 1.4845 (X8CrNi25-21) |
| Chav -temp tensile zog | Siab dua me ntsis (carbon solid-kev daws teeb meem) | Raws li ASTM A312 |
| Intergranular corrosion txaus ntshai | Siab nyob rau hauv lub qhov rais 425–860℃rhiab heev | Tsawg heev |
| Weldability | Marginal - xav tau kev saib xyuas nrog kev muab tub lim thiab txheej txheem | Zoo - tus qauv TIG/MIG/MAG siv tau |
| Hom kev siv | Tsis yog-welded siab-temp Cheebtsam, zoo li qub rauv qhov chaw | Welded yeeb nkab tshuab, fabricated sib dhos, siab piping |
Khoom Specification
Qib: AISI 310S / UNS S31008 / EN 1.4845 / W.Nr. 1.4845
Kev tsim qauv: ASTM A312 (pipe) lossis ASTM A213 (tube) - qhia meej TP310S
Hom: Seamless / ERW / EFW - qhia meej meej
Loj: OD × phab ntsa thickness los yog NPS × sij hawm
Ntev: Ib qho random (4.8-6.7m), ob chav random (9-12m), lossis ntev ntev (xws li)
Xaus: Plain End (PE), Beveled End (BE) - qhia lub kaum sab xis yog tias tsis yog -tus qauv
Nto tiav: Pickled thiab passivated (tus qauv), polished (xws li grit), ci annealed
Kev Xav Tau Zoo
MTC: EN 10204 3.1 (3.2 yog thib peb- tog neeg ua pov thawj)
Kev kho cua sov: tshuaj annealed ntawm 1040-1150 degree, txias ceev
NDT: Hydrotest rau ASTM A312; UT puv -lub cev rau ntau dua lossis sib npaug rau 4 "NB seamless
PMI: 100% pov thawj ntawm txhua qhov ntev
Cov qoob loo loj: ASTM E112, lub hom phiaj 4-6 (yog tias tau teev tseg)
Intergranular corrosion: ASTM A262 Xyaum E (yog tias muaj kev pabcuam hauv kev nkag siab ntau)
Txoj kev tsim khoom: Seamless, Welded
S310S yeeb nkab tuaj txog hauv peb hom kev tsim khoom, txhua tus muaj tus nqi sib txawv, ntsuas qhov siab, thiab qhov profile zoo:
Seamless Yeeb Nkab (SMLS)
Ua los ntawm kev tho lub pob zeb thiab tom qab ntawd kub - dov lossis txias - kos duab mus rau qhov ntev kawg. Seamless yeeb nkab tsis muaj longitudinal weld seam, uas tshem tawm qhov tsis muaj zog ntawm metallurgical txuas nyob rau hauv lub siab ciam teb. Rau siab - kub siab daim ntawv thov - boiler raj, superheater raj, reformer rauv raj - seamless yog lub neej ntawd.ASTM A213 TP 310 S(seamless boiler / superheater / heat exchanger tubes) thiab ASTM A312 TP310S (seamless yeeb nkab rau kev pab cuam) yog cov tswj specifications.
Seamless S310S yeeb nkab nqi15-25% ntau duatshaj qhov sib npaug welded khoom, nyob ntawm qhov loj me. Tus nqi qis qis rau cov kab me me (hauv qab 2 ") qhov txias - kos duab ua haujlwm siab, thiab nthuav dav rau cov kab loj loj (tshaj 12") qhov twg cov pob zeb muaj thiab tho qhov muaj peev xwm ua rau muaj kev txwv.
Welded yeeb nkab (ERW / EFW)
Ua los ntawm dov phaj los yog sawb mus rau hauv ib daim ntawv cylindrical thiab welding lub longitudinal seam. Hluav taws xob Resistance Welded (ERW) yeeb nkab siv cov cua sov ua haujlwm kom fuse cov npoo tsis muaj cov hlau muab tub lim; Fais Fusion Welded (EFW) siv cov khoom ntim khoom siv nrog TIG lossis ntshav welding. ASTM A249 TP310S npog welded boiler / tshav kub exchanger raj; ASTM A358 TP310S npog EFW yeeb nkab rau siab - qhov kub thiab txias kev pabcuam.
Welded S310S yeeb nkab yog siv tau rau ntau yam tsis yog -code lossis qis- cov ntawv siv siab thiab yog siv dav hauv cov khoom siv hluav taws xob, cov kav dej, thiab cov pa tawm. Lub weld seam, thaum ua kom zoo thiab annealed, ua tiav lub hauv paus-hlau- sib npaug cov khoom siv tshuab. Txawm li cas los xij, nyob rau hauv kev pabcuam thermal, lub vuam seam HAZ (tshav sov- thaj tsam cuam tshuam) tuaj yeem dhau los ua qhov zoo tshaj plaws kev pib tawg vim qhov seem ntawm qhov sib txawv ntawm cov nplej.
Vuam S310S: Filler Hlau, Sigma Phase, thiab Post- Weld Integrity
Vuam yog qhov twg S310S yeeb nkab tshuab ua tiav lossis tsis ua haujlwm. Qib nws tus kheej yog nkag tau yooj yim los ntawm TIG (GTAW), MIG (GMAW), thiab SMAW (stick) txheej txheem. Tsis tas yuav preheat. Tab sis peb qhov teeb meem tshwj xeeb xav tau kev saib xyuas.
Filler Hlau Xaiv
Tus qauv txuam muab tub lim rau S310S yogSIB 310(bare wire for GTAW/GMAW) orE310-15/E310-16(Cov electrode rau SMAW). ER310 muaj tib yam 25Cr-20Ni chemistry raws li lub hauv paus hlau, ua ib tug weld deposit uas phim cov oxidation kuj thiab thermal expansion cwj pwm ntawm cov yeeb nkab.
Txawm li cas los xij, kev sib xyaw ua ke tuaj yeem ua teeb meem hauv qee qhov kev pabcuam. Yog tias qhov sib txuas welded yuav ua haujlwm nyob rau hauv 650-900℃sigma-theem ntau rau ncua sij hawm, qhov vuam tso nyiaj - uas solidifies nrog ib tug dendritic qauv thiab micro-segregation - tuaj yeem tsim sigma sai dua lub hauv paus hlau. Hauv cov xwm txheej no, adissimilar muab tub lim zoo li ERNiCr-3 (Alloy 82)los yogERNiCrMo-3 (Alloy 625)tej zaum yuav tau teev tseg. Cov npib tsib xee - cov hauv paus muab tub lim no tiv thaiv kev tsim cov sigma thiab muab kev nkag siab zoo dua ntawm qhov vuam, txawm tias tus nqi siab dua.
| Filler Hlau | Txheej txheem | Chemistry (Cr-Ni-Fe) | Zoo tshaj rau | Tus nqi txheeb ze |
|---|---|---|---|---|
| SIB 310 | GMAW / GMAW | 25Cr-20Ni-Fe tshuav nyiaj li cas | Matching chemistry, kev pabcuam txheem | Lub hauv paus |
| E310-15 | SMAW | 25Cr-20Ni-Fe tshuav nyiaj li cas | Field welding, txoj haujlwm ua haujlwm | +10–15% |
| ERNiCr-3 (Alloy 82) | GMAW / GMAW | 20Cr-72Ni-Fe | Sigma- kev pabcuam yooj yim, sib txuas sib txuas | +200–250% |
| ERNiCrMo-3 (Alloy 625) | GMAW / GMAW | 22Cr-60Ni-9Mo | Kev pabcuam hnyav carburizing / corrosive | +300–350% |
Tshaj tawm -Kev kho cua sov (PWHT)
S310S feem ntau uatsis xav tau PWHTtom qab vuam rau feem ntau siv. Cov ntsiab lus carbon tsawg (tsawg dua lossis sib npaug li 0.08%) txo qis qhov kev pheej hmoo ntawm kev nkag siab, thiab cov qauv austenitic tsis dhau los ntawm kev hloov pauv martensitic uas ua rau PWHT yuav tsum tau ua rau qee qib ferritic thiab martensitic.
Qhov tshwj xeeb yog thaum S310S tau txias heev - ua haujlwm ua ntej vuam - piv txwv li, hauv txias - lub luj tshib lossis lub taub hau tsim. Kev ua haujlwm txias qhia txog lub zog seem uas tuaj yeem ua kom cov nag lossis daus ntawm carbide thaum vuam. Hauv cov xwm txheej zoo li no, akev daws anneal ntawm 1050-1150℃tom qab quench sairestores lub equilibrium microstructure. Qhov no tsis yog PWHT hauv kev xav ib txwm muaj; nws yog ib tug tag nrho cov kev kho mob uas redissoles tej precipitated carbides thiab tshem tawm cov residual stresses.
Weld Defect Indicators Specifications rau S310S
Peb qhov kev tsis zoo weld hom rov tshwm sim hauvS310S cevkev tsim:
Kub tawg (solidification cracking):Lub 25Cr-20Ni muaj pes tsawg leeg muaj qhov sib txawv ntawm qhov kub thiab txias, ua rau nws raug kub kub tawg yog tias lub pas dej sib txuas raug txwv thiab cov ntsiab lus sulfur / phosphorus nyob rau qhov siab kawg ntawm lub qhov rais spec. Siv cov muab tub lim nrog tswj qis S / P (ER310 feem ntau khiav S Tsawg dua lossis sib npaug rau 0.015%, P Tsawg dua lossis sib npaug rau 0.020%) txo qhov no.
Pom tau hauv RT / UT raws li:Linear indications raws lub weld centerline, feem ntau branching.
Sensitization hauv HAZ:Yog hais tias lub vuam cua sov input yog siab dhau lawm (kev mus los qeeb heev), lub HAZ dwells nyob rau hauv lub 425-860℃sensitization ntau yam ntev txaus rau chromium carbide los nag. Tswj cua sov input rau1.0-1.5 kJ / hlirau cov phab ntsa tuab txog li 6 hli.
