1. Dab tsi yog qhov tseem ceeb mellurgical sib txawv ntawm "stainless yeeb nkab" thiab monel k-500/501 yeeb nkab tseem ceeb rau kev xaiv cov khoom siv?
Qhov feem ntau qhov kev sib txawv tshaj plaws nyob hauv lawv cov hauv paus alloying system thiab thawj cov tshuab ntawm corrosion tsis kam. Qhov no yog ib qho tseem ceeb categorization uas ua rau lawv daim ntawv thov tag nrho.
Cov yeeb nkab hlau: qhov no yog tsev neeg ntawm cov hlau {{chromium (fe - cr) alloys. Lawv cov corrosion tsis kam los ntawm passive, chromium- richxes txheej (cr₂o₃) uas ua rau saum npoo. "Stainless" cov cuab yeej yog nyob ntawm no zaj duab xis passive. Hom Hom 304/316 (Austenicic) lossis 2205 (Corrosebenum, Molybdenum, thiab Nitrogen, tab sis cov hlau nyob twj ywm lub hauv paus pib.
Monel k - 500/501 Yeeb: Qhov no yog ib npib tsib {} tooj liab (n}} cu) alloy. Nws corrosion tsis kam yog ib qho chaw nyob hauv tsib xee - tooj liab matrix, uas yog qhov muaj zog tiv thaiv ib puag ncig. Nws tsis cia siab rau cov yeeb yaj kiab passive nyob rau hauv tib txoj kev stainless hlau ua. Tsis tas li ntawd, monel k - 500/501 yog hnub nyoog {} {} {} {
Vim li cas qhov kev txawv no tseem ceeb:
Xaiv cov khoom tsis raug raws li lub sij hawm tsis zoo xws li "corrosion - resistant" tuaj yeem ua rau kev puas tsuaj.
Koj yuav tsis siv stainless hlau hauv kub, concentrated hydrofluoric acid (HF); Nws yuav nrawm nrawm. Monel K-500 yog ib ntawm ob peb alloys tsim rau cov kev pabcuam no.
Koj yuav tsis siv Monel K-500 nyob rau hauv muaj zog oxidizing acids zoo li nitric acid; Nws yuav raug tawm tsam. Qee cov hlau hlau ua tau zoo hauv qhov chaw ib puag ncig no.
Koj yuav tsis siv cov qauv hlau stainless (304, 316) qeeb} Kev tsiv tsev, raws li nws tau raug kev ntxhov siab rau chloride kev ntxhov siab corrosion (SCC). Monel K-500 tau txhaj tshuaj zoo rau chloride SCC.
Hauv cov ntsiab lus, Stainless Hlau =} hlau {}} be}} relies ntawm passive cr- oxide zaj duab xis. Monel =} - be}} puag, thiab tuaj yeem yog nag lossis daus- tawv.
2. Hauv marine engineering, thaum yog monel k- 500 cov yeeb nkab tsis tseem ceeb xws li Super Aldlex 2507 yog ib txoj kev xaiv zoo?
Qhov kev xaiv hauv cov chaw marine nyob ntawm qhov kev sib xyaw ua ke ntawm corrosion, lub zog, thiab tus nqi yuav tsum tau ua.
Monel K-500 cov yeeb nkab yog qhov tseem ceeb rau:
High - Lub zog, tsis yog {1} {} Cov khoom sib nqus
Cov ntawv thov uas muaj cov acid
Superior anti - hole galling, rau valve ci, thiab lub plab nciab, cov menyuam muaj kuab heev rau galling thiab hnav dua li feem ntau stainless hlau.
Qhov siab tshaj plaws mus rau chloride SCC: rau cov kab lis kev uas yuav pom cov neeg tsis huv, Monel K-500 lub cev tsis muaj zog rau qhov tsis ua hauj lwm zoo muab kev nyab xeeb.
Super Duplex Stainless Hlau (piv txwv li, Untren S32750) raws li lwm txoj kev:
Super Duplex 2507 tej zaum yuav haum thiab ntau dua tus nqi-}}}} Siv txoj hauv kev zoo rau Monel K-500 cov yeeb nkab hauv cov xwm txheej hauv qab no:
Dej hiav txwv cov khoom siv:- pittater ua hauj lwm (}} tus nqi seater (} Kuj mus rau chloride SCC. Nws muab kev sib npaug zoo ntawm kev ua tau zoo thiab tus nqi rau cov cwj pwm tau roj zoo.
Thaum tus nqi yog ib tus neeg tsav tsheb loj: Monel K- 500} {{}} ecloy, yog qhov tseem ceeb tshaj plaws kim dua cov hlau tsis muaj nqi. Rau cov ntawv thov tseem ceeb tsawg dua uas super duplex raws li txoj kev xeb thiab cov txheej txheem kev lag luam, nws yog kev lag luam kev cai lij choj.
Decision Summary: Use Monel K-500 for the most critical, high-stress, non-magnetic, or HF-containing services. Xav txog super duplex rau loj-teev sewater dej uas nws lub siab pren thiab lub zog muaj txaus, thiab cov nqi nyiaj tau los muaj ntau yam.
3. Dab tsi yog qhov tseem ceeb ntawm kev sib tw tseem ceeb thaum vuam m-500 yeeb nkab, thiab nws txawv li cas ntawm vuam stainless hlau yeeb nkab?
Lub ntsiab lus sib tw hauv Vuam Monel K-500 cov yeeb nkab yog tswj cov zog ntawm lub zog ntawm welded sib koom tes ntawm welded sib koom tes nrog cov qauv kev ua kom muaj kev sib koom ua ke.
Monel K-500 vuam teeb meem:
Monel K - 500 derives nws lub zog siab los ntawm kev kho mob thaum nag lossis daus).
Qhov kev kho cua sov no tsis tuaj yeem thov mus rau tom daim teb weld yam tsis muaj kev rhuav tshem cov khoom ntawm tag nrho cov kab pheebsuab.
Yog li ntawd, txoj kev xyaum yog rau Weld K- 500} {} Lub taub hau 66 (erni4060), uas muaj ntau yam sib xws rau Monel 400.
Qhov tshwm sim: The Weld hlau muaj lub txiaj ntsig ib puag ncig 40-50 ksi (Monel 400 qib muaj ib qho txiaj ntsig zoo ntawm 110-150 KSI. Qhov no tsim lub zog tseem ceeb undermatch, ua rau weld lub tshuab tsis muaj zog taw tes rau hauv lub system.
Kev siv rau cov qauv tsim qauv piping:
Tus kws tshaj lij yuav tsum tsim cov kab ke kom ntseeg tau tias kev ntxhov siab ntawm Weld nyob hauv lub peev xwm ntawm cov hlau tsis muaj zog weld. Qhov no tuaj yeem koom nrog kev hloov pauv ntawm Welds rau tsawg- kev nyuaj siab thaj chaw lossis muab tag nrho cov kab ke lub siab muaj peev xwm.
Sib piv rau vuam ustenitic stainless hlau yeeb (piv txwv li 316L):
Vuam 316L stainless hlau yog qhov ncaj dua. Lub hom phiaj yog siv cov muab tub lim hlau (piv txwv li, ER316L) uas tsim kom muaj microstred cov ntsiab lus) thiab lub zog ntawm cov khoom siv ferrite (orrosion nrog lub zog ua hauj lwm thiab lub zog rau lub hauv paus hlau. Tsis muaj muaj lub zog muaj zog undermind qhov teeb meem.
Sib koom cov nyom: ob qho tib si alloys xav tau:
Ceebtaj heev huv: txhawm rau tiv thaiv cov pa roj carbon pickup lossis paug.
Rov qab ntxuav tawm: Siv Argon ntawm lub hauv paus sab kom tiv thaiv oxidation thiab "qab zib."
Kev tswj cov lus qhia tshav kub kub: kom tsis txhob muaj kev loj hlob ntau dhau los yog cais.
4. Kev ua tau zoo li cas ntawm Monel K- 500 thiab hlau stainless 316L yeeb nkab sib txawv hauv cov dej siab kub (NAOH) ib puag ncig?
Nyob rau hauv kub, concentrated caustic ib puag ncig, Monel K-500 qhia pom meej thiab kev txiav txim siab ua tau zoo dua ntawm cov hlau stainless.
Stainless hlau 316L Yeeb:
Performance: Stainless hlaus tuaj yeem raug kev nyuaj siab los ntawm kev tawg ua kom tawg, tshwj xeeb hauv cov kev ntxhov siab saum toj no ~ 20% thiab ntawm qhov kub tshaj 120℃(250℃(250℃f). Lub Passive oxide zaj duab xis yog tsis ruaj khov nyob rau hauv kub caustics.
Daim ntawv thov Txwv: Nws yog feem ntau tsis pom zoo rau kev pabcuam kom hnyav, tshwj xeeb tshaj yog nyob rau hauv cov kev ntxhov siab ntau.
Monel K-500 Yeeb:
Kev Ua Tau Zoo: Nickel thiab nws cov alellots, suav nrog cov monel k-500, yog cov ntaub ntawv uas nyiam siv rau kev siv kub, muaj cov khoom noj kom sov. Lawv nthuav tawm zoo heev rau txhua qhov kev muaj, txawm tias nyob hauv Molten State (~ 700℃F / 370 degree). Lawv tsis tshua muaj peev xwm ua rau caustic tawg hauv tib txoj kev uas yog stainless hlau.
Daim ntawv thov: Monel K- 500 kav, thiab cov roj, thiab lwm cov khoom siv hauv Chlor-alkali Kev lag luam.
Lub Rationale: Nickel ua cov txheej txheem tiv thaiv, ruaj khov txheej hauv cov khoom siv roj av, hydroxides uas tuaj yeem ua rau muaj kev ntxhov siab thiab tawg ua kom tawg.
Xaus: Rau qhov siab - kub, motion} ntsuas kub, Monel K-500 yog lub zog loj, thaum 316L stainless hlau yuav yog qhov kev xaiv tsis zoo thiab muaj kev phom sij.
5. Dab tsi yog cov muaj feem cuam ottm qauv rau procuring monel k-500 yeeb nkab, thiab lawv ua li cas lawv txawv ntawm cov neeg rau cov kav hlau uas tsis muaj zog?
Txheeb cov ntaub ntawv no rau cov qauv raug lawv tau raws li cov tshuaj uas yuav tsum tau ua, tshuab, thiab cov qauv zoo.
Monel K-500 (UN tsis muaj N05500) Yeeb:
Thawj tus qauv: Astm b 865}} / asme sb 865}}}}: qhov no yog cov qauv kev qhia tshwj xeeb rauSeamless thiab weldedNickel - hypper -}} aluminium alloy (tsis muaj n05500) yeeb nkab thiab raj. Nws nkag siab txog qhov yuav tsum tau ua rau K-500, suav nrog chemistry thiab cov khoom siv mechanies hauv cov neeg laus.
Lwm cov txheej txheem: Astm B164 / ASME SB164: Tus qauv no rau- tooj liab tus pas nrig, bar, thiab cov hlau tseem siv rau qib K-500Seamless Yeeb Nkabuas yog tsim los ntawm kub extrusion los ntawm ib qho bar Tshuag.
Stainless hlau 316 / 316L (unren s31600 / s31603) Yeeb:
Thawj tus qauv: Astm A312 / ASME SA312: qhov no yog tus qauv kev qhia tshwj xeeb rauSeamless thiab weldedAustenitic stainless hlau yeeb nkab. Nws tau npog ntau hom kev sib tw dav hlau, suav nrog 316 thiab 316L, qhia txog lawv cov chemistry, cov khoom siv mechanies, thiab kuaj.
Qhov sib txawv ntawm cov qauv:
Lub hauv paus Alloy System: Astm B 865} yog rau ni-}} ni ni alloys.
Yuav tsum muaj:
ASTM B 865} rau k-}}}} wb, 1100℃f rau 16 teev) kom ua tiav lub zog siab.
ASTM A312 rau 316L feem ntau yuav tsum muaj kev daws anealing tshav kub (maj nrawm los ntawm qhov siab kub) kom yaj thiab rov kho corrosion tsis kam.
Cov Khoom Siv Cov Khoom Siv Cov Khoom Siv Tshwj Xeeb: Qhov tsawg kawg nkaus tau tawm los thiab tensile muaj zog nyob rau hauv Astm B {}} muaj ntau dua li cov hauv A312 rau 316L.
Cov ntaub ntawv sib koom: Ob tus qauv yuav tsum muaj daim ntawv pov thawj zeb xeem (MTC) uas muab tus lej xov tooj rau cov cua sov thiab cov ntaub ntawv yuav tsum muaj. Qhov no yog qhov kawg - neeg siv kev lav ntawm kev ua tau zoo.
