Cov khoom ntawm inconel 625
Inconel 625 (Alloy 625, 2.4856) yog lub zog npib npib tsib xee nrog lub zog zoo thiab zoo heev corrosature thiab kub. Nws yog feem ntau ntawm lub npib (tsawg kawg 58%) nrog ntxiv cov chromium, xws li me me ntawm mathanese, silvalt, silicon, txhuas, thiab titanium.
Inconel 625 tau tsim los ntawm Inco Corporation (tam sim no Feem ntawm Cov Hlau Tshwj Xeeb Coral) thaum xyoo 1960, li no cov cim lag luam tsis sib xws. Txawm hais tias lwm cov chaw tsim khoom tam sim no tsim cov qauv sib txawv ntawm cov cim scoronnark tau dhau los ua cov cim lag luam uas muaj menyuam yaus Nickel-licomium almoy tsev neeg. Nws pib kev txhim kho los ntawm qhov xav tau ntawm cov alloys kom ua haujlwm ntawm cov txheej txheem loj dua hauv cov txheej txheem hluav taws xob (vim qhov no tuaj yeem ua rau lub thermodynamic efficiency ntawm cov khoom siv. Daim ntawv thov thawj zaug suav nrog cov kav dej piping, tab sis dhau lub sijhawm nws cov kev tso pa roj av, kev hloov pauv roj cua sov, cov roj roj, thiab cov pob zeb hluav taws xob. Raws li cov kev paub metallgical thiab cov txheej txheem statide tau muaj kev txhim kho, cov lej sib xyaw ua ke tau hloov kho me ntsis. Qhov kev qhia tshwj xeeb tam sim no muaj siab dua thiab weldability tshaj li siv ntau haum rau siv ntau dua rau kev siv lub zog kub thiab muaj zog hluav taws xob.
Nickel alloys tau haum zoo rau cov ntawv thov kub nyhiab vim tias lawv ua cov txheej txheem ruaj khov vim tias lawv cov txheej oxide uas txwv tsis pub ua cov hlau ntxiv. Chromium ntxiv rau txhim kho corrosion tsis kam tab sis ua me ntsis los txhim kho cov khoom siv neeg kho tshuab. Rau inconel 625 alloy, niobium thiab manganese ntxiv txhim kho cov txiaj ntsig muaj zog. Yam tsawg kawg nkaus paib lub zog yog 50 Ksi (345 n / mm²) rau diameters loj dua 4 nti (100 hli) thiab 415 n / msi (415 n / msi (415 n / mm²) rau me me diameters. Yam tsawg kawg nkaus tensile muaj zog yog 110 Ksi (760 n / mm 11) thiab 120 ksi (830 n / mmol), feem.
Me me ntawm manganese (feem ntau<0.5% maximum) provide some solid solution strengthening. From a metallurgical perspective, this means that manganese dissolves with the nickel and chromium but slightly stresses the crystal structure. This is caused by a mismatch in the relative sizes of the atoms that make up the crystal structure. This disturbance impedes the movement of dislocations and other defects in the crystal structure, increasing its strength under load.
Niobium kuj tseem laus nyob hauv npib tsib xee-chromium alloys, tab sis feem ntau siv nyob rau hauv lwm cov almoys, xws li Inconel 718, los muab nag lossis daus. Niobium yog cov khoom siv ntxiv dag zog. Tom qab kev ua kev laus tshav kub, niobium sib xyaw nrog cov pa roj carbon los ua cov me me ntawm niobium carbide, uas muaj txiaj ntsig zoo heev txhim kho lub zog. Txawm li cas los xij, hauv Inconel 625 Alloy, Niobium siv tau ntau dua li, feem ntau {}}%. Nws txhim kho cov kev siv cov nyhuv tag nrho Qee tus neeg siv khoom tshwj xeeb muaj cov kev cai tshwj xeeb rau kev laus 625 Alloy, uas yog, kev ntsuas kev kawm ntxiv thiab kuaj cov khoom lag luam muaj txiaj ntsig, tab sis xws li kev thov tsis tshua muaj.
Txawm hais tias inconel 625 alloy tsis yog li muaj zog li incymucted alloys, nws qis me ntsis qis dua super duplex steel stainless hlau steel stainless hlau steel stainless hlau steel stainless hlau Stainless hlau Stainless Stainless hlau Stainless. Tsis tas li ntawd, nws cov khoom yuav ruaj khov dua li qhov ntsuas kub thiab txias. Kev Cuam Tshuam Lub zog yog tswj hwm ntawm tsawg kub ({}}} degree thiab {} degree thiab {6} degree. Ib yam li ntawd, lawv cov tshuab ua haujlwm nyob ruaj khov txog 650 degree, saum toj uas cov txiaj ntsig thiab lub zog tensile poob siab. Cov ntsiab lus npib tsib xee ua haujlwm txuas ntxiv oxidation tiv taus ze li 1000 degree, tso cai rau siv hauv cov ntawv thov tsis yog hom lossis load-cov kabmob.
Cov txheej txheem nkag mus nyob zoo txog 650 degree, raws li cov txheej txheem nag ntxov tshwm sim nyob rau hauv lossis siab dua qhov kub thiab me ntsis degrades cov khoom siv neeg kho tshuab. Txias ua haujlwm tuaj yeem siv rau kev nce qib ua kom muaj zog ntau. Kev siv hluav taws xob thiab vuam vuam kuj tseem yooj yim heev, muab cov cuab yeej siv kom raug, teeb txheej txheem vuam siv.
Txawm hais tias feem ntau siv hauv cov ntawv thov uas nws cov khoom siv neeg kho tshuab tau tshawb xyuas los ntawm nws cov kev ua tau zoo heev, nws kuj tseem muaj ntau yam kev tawm tsam ntau yam. Nrog tshaj 20% chromium thiab txog li 10% molybdenum, inconel 625 alloy muaj qhov pitting tivthaiv tus lej (pren) ntawm 45 lossis siab dua. Qhov no ua kom pom tseeb tsis zoo rau pitting thiab corrosion corrosion. Raws li qhov tshwm sim, nws yog qhov zoo rau siv nyob rau hauv seaterwater, brackish lossis dej phwj teb ib puag ncig thiab rau cov khoom siv nkoj thiab cov cuab yeej siv hluav taws xob.
Kev lag luam kev ua lag luam yog ib qho kev thov ib qho rau cov tsis muaj peev xwm 625 alloy. Ntxiv nrog rau nws txoj kev txhim kho corrosion thiab kub tiv taus vuam thiab fineration ua rau nws zoo tagnrho rau kev tsim khoom siv cua sov, li qub thiab txuas.
Inconel 625 Alloy ntsib Nace MR {1}} (iso}) Cov qauv rau cov qauv hydrogen sulfide, lossis h2s. Raws li qhov tshwm sim, feem ntau nws siv hauv cov roj thiab roj kev siv uas yog suav tias yog "qaub" thiab muaj kev pheej hmoo ntawm sulfide kev ntxhov siab tawg. Cov qib metertructure thiab xam phaj tawv tau zoo haum rau cov cuab yeej, downhole tubing thiab hangers.
