1. UNS N06002 yog dab tsi, thiab nws cov yam ntxwv tseem ceeb ntawm kev ua haujlwm yog dab tsi uas ua rau nws haum rau siab -kub siv cov kav dej?
UNS N06002, tseem paub los ntawm lub npe lag luam Haynes 230®, yog npib tsib xee -chromium-tungsten- molybdenum alloy uas sawv cev rau cov kev daws teeb meem tseem ceeb rau qhov kub siab tshaj - kev pabcuam kub. Nws raug cais raws li ib qho khoom siv - kev daws teeb meem, wrought superalloy. Nws qhov tshwj xeeb tsim nyog rau cov kav dej tseem ceeb yog los ntawm kev sib xyaw ua ke ntawm cov khoom:
Qhov Zoo Tshaj Plaws Siab -Temperature Strength: Nws khaws cov tensile tseem ceeb thiab creep- tawg lub zog ntawm qhov kub siab tshaj 1000 ° C (1800 ° F), deb tshaj cov hlau tsis muaj steel. Qhov no tiv thaiv sagging, distortion, lossis tawg tsis ua haujlwm hauv cov kav dej kub.
Superior Oxidation Resistance: The alloy forms a dense, adherent, and slow-growing chromium oxide (Cr₂O₃) scale. Cov txheej tiv thaiv no muab qhov tshwj xeeb tiv thaiv kev ntsuas thiab degradation hauv oxidizing cua mus txog 1150 ° C (2100 ° F), kom ntseeg tau ntev - cov khoom siv ruaj khov.
Kev ruaj ntseg zoo heev: N06002 yog tsim los tiv thaiv kev tsim ntawm deleterious topologically ze- ntim (TCP) theem xws li sigma (σ) thiab mu (μ) uas tuaj yeem ua rau lwm cov alloys tom qab ntev - lub sij hawm raug nyob rau hauv 650-1150 ° C ntau yam. Qhov no ua kom ductility thiab toughness yog khaws cia nyob rau lub sijhawm.
Zoo Fabricability: Txawm hais tias nws lub zog siab, nws tuaj yeem welded, tsim, thiab machined siv cov txheej txheem tsim rau cov nickel alloys, tso cai rau kev tsim cov piping spools.
Cov yam ntxwv no ua rau N06002 yeeb nkab cov khoom ntawm kev xaiv rau feem xav tau tshaj plaws ntawm cov cua kub cua sov, cov raj radiant, combustors, thiab siab -kub kub exchangers qhov twg ob qho tag nrho cov neeg kho tshuab load thiab oxidation hnyav yog concurrent challengers.
2. Cov kev lag luam tshwj xeeb thiab cov ntawv thov twg yog UNS N06002 yeeb nkab feem ntau ua haujlwm?
UNS N06002 yeeb nkab pom nws cov niche nyob rau hauv daim ntawv thov qhov twg kub thawb tshaj qhov txwv ntawm tus qauv austenitic stainless hlau thiab txawm ntau lwm yam nickel alloys. Nws qhov kev xa tawm tseem ceeb yog nyob rau hauv:
Thermal Processing & Thaum tshav kub kub kho: Siv rau radiant raj, muffles, retorts, thiab cub tawg yob nyob rau hauv carburizing, nitriding, annealing, thiab sintering rauv. Nws tsis kam mus rau thermal cycling thiab carburizing / oxidizing cua yog qhov tseem ceeb ntawm no.
Aerospace & Gas Turbines: Ua hauj lwm nyob rau hauv combustion liner Cheebtsam, kev hloov ducts, thiab afterburner qhov chaw uas huab cua kub los ntawm combustion yog tam sim no. Nws lub zog - rau - qhov hnyav piv ntawm qhov kub thiab txias yog qhov txiaj ntsig tseem ceeb.
Chemical Process Industries (CPI): Tshwj xeeb rau siab -kub reactor internals, hloov kab, thiab downstream piping nyob rau hauv cov txheej txheem xws li chav methane hloov, nitric acid ntau lawm, thiab syngas ntau lawm, qhov twg raug kub, corrosive txheej txheem gases yog tas li.
Lub Hwj Chim Loj: Siv nyob rau hauv cov tshuab siab heev, suav nrog ultra-supercritical boilers, cua sov rov qab lub tshuab hluav taws xob (HRSGs), thiab cov khoom siv hauv kev sib xyaw gasification ua ke (IGCC) cov nroj tsuag, tuav - qhov kub thiab txias, siab - siab chav thiab combustion gases.
Kev Tiv Thaiv Kev Ua qias tuaj: Tsim nyog rau ducting thiab cov khoom siv hauv thermal oxidizers thiab incinerators uas yuav tsum tau ua kom nruj, cov pa roj kub kub.
Hauv cov ntsiab lus, N06002 yeeb nkab tau teev rau "kub workhorse" ntu ntawm lub kaw lus, feem ntau sawv cev rau tus nqi - qhov sib npaug ntawm kev ua tau zoo thiab kev ua haujlwm ntev piv rau cov platinum kim dua - pab pawg hlau alloys lossis ceramic tov.
3. Dab tsi yog qhov kev txiav txim siab tseem ceeb rau vuam UNS N06002 piping, thiab cov hlau muab tub lim feem ntau pom zoo?
Vuam yog ib qho tseem ceeb ntawm kev tsim cov txheej txheem rau N06002 piping systems, yuav tsum tau muaj kev tswj hwm los khaws nws cov khoom hauv lub cev. Cov ntsiab lus tseem ceeb suav nrog:
Kev huv huv: Paramount. Txhua qhov chaw (cov yeeb nkab kawg, cov hlau muab tub lim) yuav tsum tau ua tib zoo ntxuav cov roj, roj, xim, thiab cov cim cim. Dedicated, paug-dawb stainless hlau hlau txhuam yuav tsum tau siv.
Kev sib koom ua ke: tsim kom haum- nrog qhov sib txawv txaus yog qhov tseem ceeb los xyuas kom meej qhov nkag mus thiab tsis txhob muaj qhov tsis xws luag.
Thaum tshav kub kub Input Control: Siv cov hluav taws xob qis mus rau nruab nrab kom txo qhov loj ntawm cov cua sov- cuam tshuam cheeb tsam (HAZ) thiab tiv thaiv kev loj hlob ntawm cov nplej ntau dhau, uas tuaj yeem cuam tshuam qhov tawv. Stringer hlaws yog nyiam tshaj qhov dav weave qauv.
Interpass Kub: Yuav tsum tau ua tib zoo tswj, feem ntau tsis tshaj 150 ° C (300 ° F), kom tsis txhob tawg.
Shielding Gas: High-purity argon (los yog argon-helium mixes) yog siv rau ob qho tib si GTAW (TIG) thaub qab thiab thaiv kom tiv thaiv oxidation ntawm tungsten thiab lub pas dej molten weld.
Filler Hlau: Feem ntau thiab pom zoo muab tub lim hlau rau vuam N06002 rau nws tus kheej yog ERNiCrWMo-1 (eg, Haynes 230® muab tub lim hlau lossis sib npaug AWS SFA 5.14 kev faib tawm). Qhov sib txuam sib xyaw muab tub lim no yog tsim los tsim cov hlau vuam nrog cov khoom siv kho tshuab thiab oxidation tsis kam zoo ib yam li cov hlau hauv paus, kom ntseeg tau tias kev ua tau zoo ntawm kev sib koom ua ke. Rau qhov sib txawv ntawm cov welds rau lwm cov alloys, cov khoom siv nickel-raws li ERNiCr-3 (Inconel 625) tej zaum yuav raug siv, tab sis qhov no yuav tsum tau ua tib zoo ntsuam xyuas engineering.
4. Ntev npaum li cas - lub sij hawm thermal stability ntawm UNS N06002 piv rau lwm yam siab - kub nickel alloys xws li UNS N06625 (Inconel 625) los yog N06022 (Hastelloy C-22)?
Qhov no yog qhov txhais tau zoo ntawm UNS N06002. Thaum UNS N06625 thiab N06022 ua tau zoo nyob rau hauv aqueous corrosion kuj thiab qis dua - qhov kub thiab txias, N06002 tshwj xeeb yog tsim los rau kev ua kom ntev tshaj - lub sij hawm ruaj khov nyob rau hauv siab siab - kub, gaseous ib puag ncig.
Theem Stability: N06002 qhov tseeb qhov sib npaug ntawm chromium, tungsten, thiab molybdenum, nrog me me ntxiv ntawm lanthanum thiab boron, ua rau qeeb cov nag lossis daus ntawm nkig theem nrab (sigma, mu, Laves) thaum lub caij nyoog laus ntawm 650-1150 ° C. Hauv qhov sib piv, N06625 yog qhov ua rau muaj zog ntxiv thiab embrittlement vim nag lossis daus ntawm gamma double prime (γ'') thiab delta (δ) theem ntawm qhov kub siab tshaj li ntawm 650 ° C, ua rau nws tsis haum rau ntev heev -lub sij hawm high-temperature kev pab cuam.
Oxidation vs. Aqueous Corrosion: N06022 (C-22) yog tus yeej hauv kev tiv thaiv pitting thiab crevice corrosion nyob rau hauv kev txo / oxidizing tshuaj ib puag ncig tab sis tsis optimized rau siab tshaj plaws kub-kub oxidation kuj los yog lub zog. Nws cov ntsiab lus molybdenum tuaj yeem txhawb kev tsis ruaj khov ntawm qhov kub siab heev.
Kev Ua Lag Luam Ua Lag Luam-tawm: N06002 txi qee qhov tshwj xeeb chloride-induced stress corrosion cracking (SCC) resistance of N06625 and the broad aqueous corrosion resistance of N06022 to achieve its world-class mix of creep strength, oxidation resistance, and microstructural stability. Yog li ntawd, rau cov kav dej kub uas siv cov roj combustion huv si lossis cua, N06002 yuav ua haujlwm tau zoo dua thiab ua rau lwm cov alloys. Qhov kev xaiv yeej ib txwm siv - tshwj xeeb.
5. Dab tsi yog qhov tseem ceeb ntawm kev ruaj ntseg thiab kev sim cov txheej txheem rau UNS N06002 yeeb nkab ua ntej kev teeb tsa?
Kev nruj QA/QC tsis yog - sib tham tau rau siab - kev ua tau zoo alloys zoo li N06002 kom ntseeg tau tias lawv ua tau raws li kev tsim qauv rau kev pabcuam tseem ceeb. Cov kev cai tseem ceeb suav nrog:
Cov ntaub ntawv pov thawj: Kev tshuaj xyuas Mill Test Certificate (MTC) lossis Certified Material Test Report (CMTR) txheeb xyuas cov hluav taws kub chemistry ua raws li ASTM B435 / ASME SB-435 (phaj / ntawv) los yog B622 (seamless yeeb nkab) rau UNS N06002, thiab cov khoom siv kho tshuab (tensile, yield, specifications.
Dimensional thiab Visual Inspection: Paub meej cov yeeb nkab OD, phab ntsa thickness, ncaj, thiab ntev. Kev kuaj pom meej meej rau qhov tsis xws luag xws li khawb, qhov, qhov tawg, lossis kev ntsuas ntau dhau los ntawm kev sib tsoo yog ua.
Tsis yog -Kev Ntsuas Kev Puas Tsuaj (NDT):
Dye Penetrant Testing (PT) lossis Liquid Penetrant Inspection (LPI): Tus qauv rau kev kuaj xyuas qhov chaw- rhuav tshem qhov tsis xws luag ntawm cov yeeb nkab sab nraud thiab sab hauv (yog siv tau).
Kev Ntsuas Ultrasonic (UT): Siv rau kev kuaj xyuas qhov tsis zoo ntawm qhov chaw, txheeb xyuas cov phab ntsa tuab, thiab, qhov tseem ceeb, rau kev tshuaj xyuas cov yeeb nkab seamless rau laminations lossis suav nrog. Rau welded yeeb nkab, UT lossis Radiographic Testing (RT) yog qhov yuav tsum tau kuaj xyuas qhov vuam seam ncaj ncees.
Eddy Current Testing (ECT): Feem ntau ua haujlwm rau seamless tubing txhawm rau txheeb xyuas qhov chaw thiab ze rau - qhov tsis xws luag.
Kev txheeb xyuas cov khoom zoo (PMI): Siv cov khoom siv tau yooj yim X-ray fluorescence (XRF) analyzers los txheeb xyuas cov alloy muaj pes tsawg leeg ntawm txhua cov yeeb nkab lossis cov qauv neeg sawv cev, tiv thaiv cov khoom sib tov-ups.
Kev Ntsuas Hydrostatic (Hydrotest): Ua ntej ua haujlwm, cov kav dej ua tiav feem ntau yog ntsuas nrog dej ntawm 1.5 npaug ntawm qhov kev tsim siab los txheeb xyuas tag nrho cov suab nrov thiab xau- nruj ntawm tag nrho cov welds thiab fittings.
Kev ua raws li cov txheej txheem no ua kom ntseeg tau tias UNS N06002 piping system muaj cov khoom tsim nyog uas yuav tsum tau ua kom muaj kev nyab xeeb, txhim khu kev qha, thiab ntev - kev ua tau zoo nyob rau hauv qhov kev rau txim siab tshaj plaws.
