N08028 tsis yog qib uas koj tau teev tseg tsis tu ncua. Rau cov kws tsim khoom thiab pab pawg muab khoom N08028 tshwj xeeb stainless hlau qhov chaw, cov khoom siv tiv thaiv corrosion tsuas yog ib nrab ntawm zaj dab neeg. Nws zaum nyob rau hauv high-alloy austenitic tsev neeg, tsim rau ib puag ncig qhov twg 316L yuav ua tsis tau-concentrated acids, chloride-nplua nuj txheej txheem ntws, thiab qaub roj. Lwm ib nrab ntawm zaj dab neeg yog seb qhov twg tuaj yeem siv rau kev kos duab, kho cua sov kom raug, thiab txheeb xyuas ua ntej nws nkag mus rau kev pabcuam. Tsab ntawv xov xwm no txuas cov khoom sib xyaw thiab cov khoom siv rau qhov ua tau tiag tiag ntawm kev tsim khoom thiab cov khoom siv N08028.
Dab tsi yog N08028 Stainless Hlau?
N08028 yog cov hlau tsis muaj hlau austenitic uas tau txheeb xyuas los ntawm UNS tus lej N08028 thiab European lub npe 1.4563 (X1NiCrMoCu 31-27-4). Nws tseem yog lag luam nyob rau hauv kev lag luam npe suav nrog Sanicro 28, Alloy 28, thiab Incoloy 028. Cov qib tau tsim los rau kev pabcuam hauv kev tshaj tawm corrosive, tshwj xeeb tshaj yog phosphoric acid ua, thiab txij li thaum tau txais kev pom zoo hauv kev ua tshuaj, roj thiab roj, thiab cov khoom siv tswj kev ua qias tuaj.
Cov hlau yog tus cwj pwm los ntawm cov ntsiab lus siab nickel (kwv yees li 31%), siab chromium (kwv yees li 27%), thiab ntxiv molybdenum thiab tooj liab. Qhov kev sib xyaw ua ke no txawv ntawm cov qib austenitic tus qauv: nws tsis yog hloov kho 316L lossis "super austenitic" hauv qhov kev nkag siab zoo, tab sis ib qho kev sib xyaw tshwj xeeb uas tsim los rau kev tiv thaiv oxidizing thiab txo cov kua qaub, nrog tooj liab ua lub luag haujlwm tseem ceeb hauv kev pabcuam sulfuric acid.
Rau kev yuav khoom thiab kos duab tshwj xeeb, cov khoom yuav tsum raug txheeb xyuas los ntawm nws tus lej UNS lossis EN es tsis yog cov npe lag luam ib leeg. ASTM B668 npog UNS N08028 thiab N08029 seamless yeeb nkab thiab raj rau cov kev pabcuam corrosive, yuav tsum muaj kev daws teeb meem thiab kev ntsuas tshuaj lom neeg, tensile, thiab hydrostatic test.
Chemical Composition thiab Key Properties
Cov nominal muaj pes tsawg leeg ntawm N08028 (UNS N08028 / EN 1.4563) yog kwv yees li: chromium 27%, npib tsib xee 31%, molybdenum 3.5%, tooj liab 1.0%, nrog carbon txwv rau ≤0.020%. Cov ntsiab lus tsis tshua muaj carbon (ELC qib) txo qis qhov kev pheej hmoo ntawm kev puas tsuaj thaum vuam thiab qhov kub siab.
Cov pitting kuj sib npaug tus lej (PRE) rau N08028 feem ntau qhia nrog qhov tsawg kawg nkaus ntawm 38, suav los ntawm tus qauv qauv PRE = % Cr + 3.3 × % Mo + 16 × % N. Cov chaw thib peb tshaj tawm PRE qhov tseem ceeb nyob rau hauv thaj tsam li ntawm 38–41, nyob ntawm cov khoom tsim thiab kev suav hauv paus. Qhov no tso N08028 zoo tshaj 316L (PRE feem ntau ~ 25-28) thiab nyob rau hauv ntau ntawm super austenitic qib, txawm hais tias nws tsis ncaj qha sib hloov nrog qib siab-molybdenum xws li 6Mo alloys.
Cov khoom siv kho tshuab rau cov kua nplaum-annealed bar Tshuag tau teev nyob rau ntawm qhov tsawg kawg nkaus yield zog (Rp0.2) ntawm 220 MPa, tensile zog 550-750 MPa, thiab elongation ≥35%. Hardness feem ntau yog ≤220 HB. Lub austenitic microstructure muab kev cuam tshuam zoo rau qhov hnyav txawm nyob rau ntawm qhov kub thiab txias.
Cov lus: Nominal muaj pes tsawg leeg thiab cov khoom tseem ceeb ntawm N08028 (tus nqi siv)
| Parameter | Tus nqi |
| Cr / Ni / Mo / Cu | ~ 27% / ~ 31% / ~ 3.5% / ~ 1.0% |
| Cov pa roj carbon (max) | 0.020% |
| PRE (qhov ntau yam) | ~ 38–41 (xws li-nyob ntawm) |
| Rp0.2 (kev daws teeb meem annealed) | ≥220 MPa |
| Rm | 550-750 MPa |
| Elongation | ≥35% |
Cov peev txheej: Alleima datasheet rau Sanicro 28. Qhov tseem ceeb yog nominal thiab yuav tsum tau lees paub tiv thaiv cov khoom tshwj xeeb thiab cov ntawv pov thawj ntawm tus neeg muag khoom.
Yuav ua li cas N08028 Sib piv nrog Cov Hlau Stainless
Kev sib piv nrog 304 thiab 316L yog ib qho uas cov neeg nyeem feem ntau yuav ua, thiab qhov sib txawv yog cov qauv, tsis yog marginal.
| Qib | Cr | Ni | Mo | Cu | PRE (tus qauv) |
| 304 | ~ 18% | ~ 8% | — | — | ~ 18–20 |
| 316l ua | ~ 16-18% | ~ 10-14% | ~ 2-3% | — | ~ 25–28 |
| N08028 | ~ 27% | ~ 31% | ~ 3.5% | ~ 1.0% | ≥38 |
PRE qhov tseem ceeb yog qhov qhia tau hais tias sib txawv nrog cov ntsiab lus tshwj xeeb thiab cov txheej txheem suav.
Cov ntsiab lus npib tsib xee ntawm N08028 yog kwv yees li peb mus rau plaub npaug ntawm 304 lossis 316L. Qhov no tseem ceeb rau ob qho laj thawj. Ua ntej, cov nickel siab txhim khu kev tiv thaiv rau chloride kev nyuaj siab corrosion cracking, hom tsis ua hauj lwm uas tuaj yeem tshwm sim hauv 304 thiab 316L nyob rau hauv ib txhij tensile stress thiab chloride raug. Thib ob, npib tsib xee stabilizes cov qauv austenitic thiab pab txhawb toughness.
Cov qib chromium thiab molybdenum muab cov pitting thiab crevice corrosion kuj tshwm sim hauv PRE tus nqi. Kev tshawb fawb ntawm superaustenitic stainless hlau tau lees paub tias nce Cr, Mo, thiab N cov ntsiab lus txhim kho corrosion kuj nyob rau hauv chloride media, thaum tooj liab ntxiv tshwj xeeb txhim khu kev tiv thaiv hauv sulfuric acid. Qhov no yog vim li cas N08028 feem ntau xaiv rau phosphoric thiab sulfuric acid ib puag ncig qhov twg 316L yuav corrode ntawm tus nqi tsis txaus ntseeg.
Kev sib pauv yog tus nqi thiab machinability. Cov ntsiab lus alloying uas muab kev tiv thaiv corrosion kuj ua rau N08028 kim dua ib kilogram thiab xav tau ntau dua rau tshuab. Nws tsis yog lub hom phiaj dav dav hloov kho los ntawm 316L; nws yog ib qho kev xaiv xaiv rau ib puag ncig uas qhov kev pheej hmoo corrosion ua pov thawj tus nqi hwm.
Kev tsim cov txheej txheem rau N08028 Stainless Steel Parts
Thawj txoj kev tsim khoom rau N08028 tshwj xeeb stainless hlau qhov chaw yog CNC machining los ntawm bar Tshuag, hollow bar, los yog forged billet. Cov khoom siv yog muaj nyob rau hauv cov tshuaj-annealed mob raws li puag ncig bar, hollow bar, thiab seamless raj. Rau feem ntau machined Cheebtsam - twj tso kua mis shafts, valve internals, fittings, thiab ntsuas lub cev - lub workflow yog: procure annealed bar los yog hollow bar mus rau qhov yuav tsum tau txoj kab uas hla, tshuab mus ze-net los yog zaum kawg cov duab, thiab xyuas qhov ntev thiab cov khoom siv.
Forging yog siv rau cov duab loj lossis ntau dua qhov kev siv cov khoom siv thiab cov qauv nplej zoo siab rau forged preform hla bar Tshuag. N08028 tuaj yeem ua haujlwm kub, tab sis lub qhov rais kub yog nqaim dua li cov qib austenitic. Cov chaw lag luam tsis raug cai qhia txog kev ua haujlwm kub ntawm kwv yees li 1050-1200 ° C nrog qhov ntsuas qhov tsawg kawg nkaus ntawm 950 ° C, tab sis cov lus qhia no tsis tshwm sim hauv Alleima datasheet tshuaj xyuas rau kab lus no thiab yuav tsum tau txheeb xyuas ncaj qha nrog cov khoom siv rau kev ua haujlwm forging.
Vuam yog ua tau thiab N08028 tau piav qhia tias muaj qhov zoo weldability, tab sis welded N08028 qhov chaw yuav tsum tau saib xyuas tom qab-weld mob. Alleima sau tseg tias hauv kev ua haujlwm vuam ib txwm, cov khoom siv hluav taws xob rau cov niam txiv cov hlau tshwm sim rau lub sijhawm luv dua li lub sijhawm uas intergranular corrosion ua rau muaj kev pheej hmoo, thiab qhov kev pheej hmoo ntawm intergranular nres tom qab vuam yog tsawg. Txawm li cas los xij, yog tias thaj chaw weld lossis tshav kub cuam tshuam yuav raug cuam tshuam rau cov kev pabcuam corrosive, kev daws teeb meem tom qab vuam kuj tseem yuav raug teev los ntawm tus kws ua haujlwm lub luag haujlwm. Kab lus no tsom rau cov khoom siv machined; welding yuav tsum raug kho raws li kev ua haujlwm tshwj xeeb uas xav tau cov txheej txheem tsim nyog.
Kev txiav txim siab Machining rau N08028 Tshwj xeeb Stainless Hlau Qhov
Machining N08028 nthuav tawm cov kev cov nyom classic ntawm high-alloy austenitic stainless hlau: ua hauj lwm ceev ceev, thermal conductivity tsawg, thiab ib tug nyiam ua raws li cov cuab yeej txiav. Cov alloy siab nickel thiab molybdenum cov ntsiab lus ua kom cov teebmeem no piv rau 316L.
Kev ua haujlwm tawv tawv yog tus cwj pwm zoo tshaj plaws rau kev tswj qhov ntev. Thaum lub cuab yeej rubs ntau dua li kev txiav-vim tsis txaus noj, lub npoo dull, lossis qhov tsis txaus ntawm kev txiav-cov txheej saum npoo hardens ho. Tom ntej no dhau mus ntsib ib tug nyuaj nto, accelerating lub cuab tam hnav thiab thawb lub lag luam mus rau chatter thiab tsis zoo nto tag. Cov tswv yim siv tau yog tias "ntse" machining tswv yim nrog lub teeb pub thiab qhov tob me me ntawm kev txiav yog qhov tsis zoo. Cov cuab yeej yuav tsum koom nrog cov khoom hauv qab ntawm thaj tsam hardened los ntawm kev dhau dhau los.
Kev tswj cua sov yog qhov tseem ceeb sib npaug. N08028 lub thermal conductivity yog tsawg, yog li txiav cov cua kub concentrates ntawm lub cuab tam ntug es tsis dissipating rau hauv lub workpiece los yog nti. Alleima cov lus qhia machining raug cai rau Sanicro 28 pom zoo kom txo cov kev txiav ceev los ntawm kwv yees li 50-55% piv rau Sanmac 316/316L thaum tig nrog coated cemented carbide cov cuab yeej, thaum txo qis qis me ntsis thiab nrog kev saib xyuas. Qhov no yog qhov pib ntawm cov khoom siv tshwj xeeb, tsis yog cov lus pom zoo rau "stainless steel." High-pressure coolant qhia ntawm qhov chaw txiav pab tswj cov cuab yeej lub neej. Cov cuab yeej geometry thiab qib kev xaiv yuav tsum tau ua kom haum rau cov haujlwm tshwj xeeb; ib tus neeg xa khoom nrog kev paub dhau los hauv high-nickel austenitic alloys yuav tsim cov kev txwv tsis yog kev sim ntawm txoj haujlwm.
Deg kev ncaj ncees deserves meej meej xim rau corrosion-resistant qhov chaw. Machining-induced residual stress thiab microstructural hloov tuaj yeem cuam tshuam qhov pib ntawm qhov chaw corrosion. Thaum cov lus teb tshwj xeeb saum npoo ntawm N08028 rau kev ua haujlwm tsis tshua muaj ntaub ntawv nyob rau hauv cov ntaub ntawv pej xeem muaj tshaj li 316L, cov ntsiab cai dav siv: ib qho smeared, ua hauj lwm-hardened nto tsis sib npaug rau ib qho huv si txiav thaum ib feem yuav ntsib chemical aggressive. Rau qhov chaw sealing tseem ceeb lossis qhov chaw ntub dej, qhov kev ua haujlwm tiav thiab cov cuab yeej yuav tsum tau teev tseg thiab txheeb xyuas.
Dimensional Accuracy, Tolerances, thiab Surface Finish
Kev kam rau siab thiab kev ua tiav ntawm qhov chaw rau N08028 yuav tsum tau tsav los ntawm kev ua haujlwm, tsis yog los ntawm kev xav tias cov khoom siv "tshwj xeeb" xav kom muaj kev sib haum xeeb nruj. Tshaj-specification ntawm cov yam ntxwv tsis ua haujlwm nce nqi thiab qhov pheej hmoo ntawm seem yam tsis muaj kev txhim kho kev ua haujlwm.
Rau qhov chaw ua haujlwm - lub ntsej muag lub ntsej muag, cov kabmob haum, mating txoj kab uas hla - kev kam rau siab yuav tsum muaj kev cuam tshuam txog kev sib dhos. Lub twj tso kua mis cov ntawv xov xwm lossis lub valve qia tuaj yeem xav tau IT7 lossis zoo dua, thaum tshem tawm qhov thiab qhov chaw tsis sib haum tuaj yeem siv cov kev zam dav dav. Tus neeg muab khoom siv machining yuav tsum paub meej tias muaj peev xwm rau cov yam ntxwv tshwj xeeb thiab cov khoom siv tsis yog xav tau los ntawm kev paub txog 316L.
Nto roughness ntawm wetted lossis sealing nto cuam tshuam rau ob qho tib si kev ua haujlwm thiab kev coj tus cwj pwm. Ib qho chaw ntxhib muab ntau qhov chaw rau qhov pib pib thiab tuaj yeem khaws cov txheej txheem seem. Rau kev sib khi lub ntsej muag, Ra qhov tseem ceeb hauv thaj tsam ntawm 0.8-1.6 μm feem ntau tau teev tseg, thaum qhov chaw tsis tseem ceeb tuaj yeem lees txais 3.2 μm lossis rougher. Cov no yog siv ntau yam rau machined stainless hlau Cheebtsam feem ntau; tus nqi tsim nyog nyob ntawm txoj kev sib khi tshwj xeeb lossis kev xav kom huv.
Ib daim ntawv qhia tswv yim rau kev kos duab: yog tias qhov chaw ua tiav lossis kev ua siab ntev tau teev tseg yam tsis muaj kev ua haujlwm ncaj ncees, tus neeg muag khoom tuaj yeem tsis kam ua haujlwm lossis hais tus nqi siab los lav kev ua raws. Cov ntawv sau meej meej ntawm qhov chaw twg yog qhov ua haujlwm tau zoo thiab uas yog kev zam dav dav pab ob tus neeg muag khoom thiab tus neeg yuav khoom.
Muaj kev siv ntawm N08028 Stainless Hlau Cheebtsam
Cov ntawv thov uas N08028 raug xaiv qhia cov yam ntxwv zoo ib yam: qhov chaw tiv thaiv corrosion tshaj qhov muaj peev xwm ntawm 316L, thiab ib feem geometry yuav tsum tau siv tshuab ntau dua li cov qauv tubular yooj yim.
Kev siv tshuaj thiab petrochemical. N08028 yog siv nyob rau hauv phosphoric acid ntau lawm khoom, sulfuric acid tuav, thiab tshav kub exchanger Cheebtsam. Cov tooj liab ntxiv tshwj xeeb txhim kho kev ua haujlwm nyob rau hauv ib puag ncig sulfuric acid, thaum chromium thiab molybdenum cov ntsiab lus hais txog oxidizing tej yam kev mob. Pump Cheebtsam, valve trim, thiab reactor internals hauv cov kev pabcuam no yog cov khoom siv machined.
Roj thiab roj-kev pabcuam qaub. Hauv ib puag ncig uas muaj H₂S, CO₂, thiab chlorides, N08028 muab kev tiv thaiv rau sulfide kev ntxhov siab tawg thiab kev ntxhov siab corrosion tawg. Alleima tshaj tawm tias Sanicro 28 tau pom zoo raws li NACE MR0175 / ISO 15156 rau sulfide kev ntxhov siab tawg tiv thaiv kev pabcuam hauv cov khoom siv roj. Cov cuab yeej Downhole, coupling stock, thiab valve Cheebtsam rau cov roj qaub qhov dej yog cov piv txwv ntawm daim ntawv thov. Nco ntsoov tias tsab xov xwm no hais txog cov khoom siv machined; tubular cov khoom yog them los ntawm kev cais tshwj xeeb.
Seawater thiab chloride-cov kabmob txias tshuab. Tus nqi siab PRE txhais tau hais tias ua rau pitting thiab crevice corrosion nyob rau hauv cov dej uas muaj chloride. Alleima hais txog qhov ua tau zoo tshaj plaws uas lees paub Sanicro 28 qhov tsim nyog rau cov kav dej hiav txwv nqa thiab dej hiav txwv-txias cua sov sib pauv. Cheebtsam xws li twj tso kua mis, fasteners, thiab valve lub cev nyob rau hauv marine los yog brackish dej txias circuits yuav siv tau N08028 qhov twg 316L tau qhia lub neej tsis txaus.
Kev tswj cov pa phem thiab flue gas desulfurization. Mixed acid thiab chloride ib puag ncig hauv FGD tshuab ntxhua khaub ncaws tuaj yeem tshaj qhov txwv ntawm cov qauv stainless hlau. N08028 Cheebtsam hauv damper shafts, tsuag nozzles, thiab twj internals yog cov piv txwv ntawm machined qhov chaw xaiv rau cov xwm txheej no.
Nyob rau hauv txhua rooj plaub, kev xaiv cov khoom yuav tsum tau validated tiv thaiv cov chemistry, kub, thiab kev nyuaj siab lub xeev ntawm daim ntawv thov. N08028 tsis yog kev daws teeb meem thoob ntiaj teb rau "corrosive" ib puag ncig; nws yog ib qho kev daws teeb meem rau ib puag ncig tshwj xeeb uas nws qhov tshwj xeeb alloy ua ke tsim nyog.
Kev Yuav Tsum Tau Paub Txog Thaum Sourcing N08028 Parts
Kev yuav khoom rau N08028 qhov chaw uas hais tias tsuas yog "khoom siv: N08028" tawm ntau dhau rau kev txhais lus. Cov kev cai hauv qab no yuav tsum tau hais meej meej hauv kev nug thiab lees paub hauv tus neeg muag khoom qhov kev tsocai thiab ntawv pov thawj.
Cov ntaub ntawv tus kheej thiab ntawv pov thawj. Qhia UNS N08028 lossis EN 1.4563, tsis yog lub npe lag luam ib leeg. Yuav tsum tau daim ntawv pov thawj ntawm cov khoom siv (MTC) rau EN 10204 3.1 uas qhia txog cov tshuaj muaj pes tsawg leeg thiab cov khoom siv kho tshuab rau cov cua sov siv. Daim ntawv pov thawj yuav tsum ua raws li cov qauv khoom lag luam (xws li EN 10088-3 rau bar).
Cov khoom tsim thiab kev mob. Rau machined qhov chaw, hais seb cov khoom pib yog bar, hollow bar, los yog forging. Cov khoom lag luam bar yuav tsum tau muab nkag rau hauv qhov kev daws teeb meem tshwj tsis yog cov khoom ua haujlwm txias yog txhob txwm xav tau. Paub meej tias tus mob annealed ntawm daim ntawv pov thawj.
Kev kho cua sov tom qab machining lossis vuam. Yog hais tias qhov yuav tsum tau welded, los yog machining induces tseem ceeb txias ua hauj lwm nyob rau hauv ib tug tseem ceeb cheeb tsam, xav seb puas yuav tsum tau kev daws annealing. N08028 tso siab rau qhov tseeb kev daws teeb meem-annealed microstructure rau kev pom zoo corrosion. Qhov kev txiav txim siab yuav tsum yog nyob ntawm qhov chaw pabcuam thiab qhov chaw ntawm kev ua haujlwm txias lossis vuam, tsis yog siv raws li lub neej ntawd. Alleima pom zoo kom cov tshuaj annealing ntawm 1100-1160 ° C ua raws li dej quenching yog xav tau kev kho cua sov ntxiv tom qab ua tiav.
Kev tshuaj xyuas thiab kev sim. Tshaj li kev soj ntsuam qhov loj me, xav txog seb puas muaj kev txheeb xyuas cov khoom zoo (PMI) yuav tsum tau txheeb xyuas tus kheej ntawm cov khoom tiav. Kev ntsuam xyuas hardness tuaj yeem muab qhov kev kuaj ntxhib ntawm kev kho cua sov. Rau kev pabcuam corrosion tseem ceeb, kev kuaj corrosion ntxiv yuav raug teev tseg, txawm tias qhov no ntxiv cov nqi thiab sijhawm ua haujlwm.
Kev huv ntawm qhov chaw. Stainless hlau qhov chaw yuav tsum tsis muaj embedded hlau paug los ntawm machining los yog tuav. Qhia kom meej tias cov khoom yuav raug ntxuav thiab passivated yog tias lawv yuav raug rau cov kev pabcuam corrosive. Tsis txhob txhuam cov pa roj carbon steel, cov cuab yeej, lossis cov khoom sib txuas nrog cov N08028 tiav.
FAQ
Puas yog N08028 tib yam li Sanicro 28, Alloy 28, thiab Incoloy 028?
Yog, cov no yog cov npe lag luam rau tib qho kev sib xyaw alloy. UNS N08028 yog tus qauv cim; EN 1.4563 yog European tsim. Qhia rau UNS lossis EN tus lej ntawm cov duab kos kom tsis txhob muaj qhov tsis meej.
Yuav N08028 ncaj qha hloov 316L?
Tsis yog ib qho kev hloov pauv uas tsis muaj kev ntsuam xyuas. N08028 muaj ntau dua corrosion kuj nyob rau hauv aggressive acids thiab chloride ib puag ncig, tab sis nws raug nqi ntau dua thiab nyuaj rau tshuab. Kev hloov pauv yuav tsum tau ua kom ncaj ncees los ntawm hom tsis ua haujlwm tshwj xeeb lossis tus nqi corrosion tau pom nrog 316L.
Puas yog N08028 xav tau kev kho cua sov tom qab vuam?
Alleima cov ntaub ntawv sau tseg tias qhov kev pheej hmoo ntawm intergranular nres tom qab vuam ntawm Sanicro 28 yog tsawg heev nyob rau hauv ib txwm vuam tej yam kev mob. Txawm li cas los xij, yog tias cov khoom siv welded yuav ua haujlwm nyob rau hauv ib puag ncig corrosive heev, cov tshuaj annealing tseem yuav tau teev tseg los ntawm kev ua haujlwm engineering lub luag haujlwm rau cov khoom siv. Qhov yuav tsum tau muaj nyob ntawm qhov kev pabcuam thiab yuav tsum tau txiav txim los ntawm rooj plaub.
Lub sij hawm coj mus kuaj rau N08028 yog dab tsi?
Lub sij hawm xa tuaj nyob ntawm cov khoom muaj, ib feem complexity, thiab kom muaj nuj nqis. Qhov no tsis yog cov lus nug txog cov khoom vaj khoom tsev thiab yuav tsum tau qhia rau tus neeg muag khoom tshwj xeeb rau kev hais lus.
