INCONEL 625 Kawm paub ntxiv txog cov yam ntxwv thiab cov yam ntxwv
Inconel 625 yog ib qho ntawm cov nickel alloys tseem ceeb ntawm tsev neeg INCONEL, thiab yog vim li cas. Ntawm no peb tshawb nrhiav vim li cas nws thiaj li nrov thiab saib nws ntau daim ntawv thov thoob plaws ntau yam kev lag luam sib txawv.
High-performance alloys tau khaws cia zoo li no siv nyob rau hauv ntau yam kev lag luam daim ntaub ntawv rau xyoo lawm yam tsis tau hloov los ntawm cov ntaub ntawv tshiab. Txawm li cas los xij, INCONEL $ 625 yog qhov sib txawv thiab tseem yog cov khoom siv hauv tsev uas cov kws tshaj lij txuas ntxiv siv.
Tsim nyob rau hauv thaum ntxov 1960s, INCONEL 625 tau nrov vim nws muaj ntau yam, tso cai rau nws siv ntau yam kev siv. Ntau tshaj li ib nrab xyoo tom qab, engineers tau pom txoj hauv kev tshiab los siv cov hlau tsis tseem ceeb no, thiab nws tseem tau txais traction. Niaj hnub no kev siv cov nickel alloys txuas mus deb tshaj lawv qhov qub siv nyob rau hauv supercritical chav piping.
Thoob plaws hauv nws lub neej, txoj kev ua haujlwm tshiab tau qhia, tso cai rau cov engineers kom nkag siab zoo dua qhov peev txheej ntawm cov hlau no. Piv txwv li, hloov maj mam hloov hauv nws cov muaj pes tsawg leeg, nrog rau kev txhim kho milling kev coj ua, nce lub neej qaug zog ntawm cov ntawv nyias. Nws kuj yog ib qho kev xaiv zoo tshaj plaws rau kev vuam thiab tuaj yeem ua kom haum rau qhov sib txawv ntawm lwm cov khoom xyaw, ua rau 625 muab tub lim hlau tshwj xeeb rau cov welds sib txawv.
zoo meej muaj pes tsawg leeg
Qhov tshwj xeeb muaj pes tsawg leeg ntawm Inconel 625 muab nws cov khoom zoo tagnrho. Nws yog high-nickel alloy, ua kom tsawg kawg yog 58% ntawm tag nrho cov sib tov. Nws kuj tseem muaj cov chromium siab heev (20-23%). Kev sib xyaw ua ke zoo tshaj plaws ntawm nickel thiab chromium imparts txawv tshaj plaw rau corrosion, tshwj xeeb tshaj yog tiv thaiv oxidizing tshuaj.
Cov ntsiab lus molybdenum (8-10%) muab cov hlau nws muaj zog heev thiab ua haujlwm nrog rau cov ntsiab lus npib tsib xee los muab kev tiv thaiv hauv qhov chaw uas tsis yog oxidizing. Molybdenum kuj yog vim li cas cov hlau no tiv taus pitting thiab crevice corrosion.
Txawm hais tias niobium tso nyiaj rau ib feem me me ntawm cov muaj pes tsawg leeg, nws stabilizes lub rhiab heev ntawm cov hlau thaum lub sij hawm vuam, yog li tiv thaiv tom qab intergranular cracking. Txhua lub hauv paus ntawm cov hlau ua haujlwm siab no pab tsim cov khoom muaj zog, ruaj khov thiab siv tau zoo heev uas daws tau ntau yam teeb meem niaj hnub tsim engineering.
Cov cwj pwm tseem ceeb
Muaj ntau qhov laj thawj vim li cas cov hlau no nrov heev. Tshwj xeeb, nws muaj pes tsawg leeg ua rau nws tuaj yeem tiv taus ntau qhov chaw corrosive. Nws zoo li tsis muaj corrosive nyob rau hauv cov mob me, xws li nyob rau hauv lub xub ntiag ntawm cov dej tshiab los yog dej hiav txwv, nruab nrab ntsev thiab alkaline xov xwm.
Nyob rau hauv ntau qhov kub thiab txias corrosive ib puag ncig, cov chromium nyob rau hauv nws muaj pes tsawg leeg muaj oxidation zoo heev, thiab molybdenum muaj kev tiv thaiv tsis-oxidizing ib puag ncig. Nws tseem tuaj yeem tiv taus qhov kub thiab txias ib puag ncig.
Nickel alloys kuj muaj zog heev. Nws lub zog siab yog los ntawm kev sib xyaw ntawm molybdenum thiab me ntsis ntawm niobium. Ua ke, cov ntsiab lus no cuam tshuam cov alloy lub atomic matrix, imparting tshwj xeeb tshaj yog muaj zog nyob rau hauv lub annealed mob yam tsis tas yuav txhob txwm ntxiv dag zog los ntawm kev kho cua sov. Yog li ntawd, alloys feem ntau yog muab rau hauv ib qho kev mob annealed los muab kev ruaj ntseg zoo thaum tsim khoom thiab siv. Nws lub zog yog manifested nyob rau hauv siab corrosion qaug zog lub zog, siab tensile zog thiab tsis kam mus rau chloride ion kev nyuaj siab corrosion cracking.
