1, Dab tsi yog npib tsib xee- Raws li Alloys tuaj yeem siv los tsim cov impellers ntawm Acid thiab Alkali Solution Transfer Pumps?
Hastelloy C series (C276, C22, C4)
Cov no yog npib tsib xee-chromium-molybdenum-tungsten alloys uas muaj kev tiv thaiv zoo rau ob qho tib si oxidizing thiab txo cov kua qaub, xws li sulfuric acid, hydrochloric acid, nitric acid, thiab cov kua qaub sib xyaw. Lawv kuj pom zoo corrosion kuj nyob rau hauv alkaline xov xwm zoo li sodium hydroxide daws.
Hastelloy C276 yog qib siv dav tshaj plaws, tsis muaj carbide nag lossis daus thaum vuam, tsis txhob cuam tshuam kev cuam tshuam ntawm intergranular corrosion. Nws yog tsim rau impellers tuav siab -concentration acid-alkali kev daws teeb meem thiab sib xyaw corrosive media.
Ib 625
Cov hlau no muaj zog los ntawm niobium, nrog lub zog tensile siab, qaug zog tsis kam, thiab corrosion kuj. Nws tiv taus corrosion los ntawm dilute mus rau nruab nrab -concentration acids (hydrochloric acid, sulfuric acid) thiab alkaline daws, thiab muaj kev tiv thaiv zoo rau pitting thiab crevice corrosion.
Nws yog qhov zoo tagnrho rau cov impellers ua haujlwm nyob rau hauv nruab nrab -corrosion thiab siab - mechanical- load tej yam kev mob, xws li hloov twj tso kua mis rau cov dej khib nyiab uas muaj cov kua qaub -alkali Cheebtsam.
Monel 400
Ib tug npib tsib xee- tooj liab alloy nrog zoo heev corrosion kuj nyob rau hauv txo acids (xws li, dilute hydrochloric acid, hydrofluoric acid) thiab alkaline xov xwm. Nws kuj muaj qhov hnav tsis kam zoo thiab qis -kub toughness.
Nws yog tsim rau impellers ntawm lub twj tso kua mis tuav dilute acid -alkali daws nyob rau hauv nruab nrab kub, tab sis tsis pom zoo rau muaj zog oxidizing acid ib puag ncig (xws li, concentrated nitric acid).
Alloy 20 (Nickel{1}} hlau-chromium alloy)
Txawm hais tias tau muab faib ua npib tsib xee- hlau-chromium alloy, nws muaj cov ntsiab lus nickel siab (32% - 38%) thiab corrosion kuj zoo heev hauv sulfuric acid, phosphoric acid, thiab alkaline daws. Nws kuj muaj qhov zoo weldability thiab tus nqi -effectiveness.
Nws yog tus nqi -kev xaiv zoo rau impellers ntawm lub twj tso kua mis tuav qis- mus rau - nruab nrab concentration acid-alkali daws nyob rau hauv cov txheej txheem tshuaj.
2, Dab tsi yog Daim Ntawv Thov Tshwj Xeeb ntawm Nickel-Raws li Alloys hauv Automobile Exhaust Gas Treatment Systems?
Substrates thiab honeycomb nqa ntawm catalytic converters
Lub catalytic converter yog qhov tseem ceeb ntawm kev kho cov pa roj. Nickel-raws li alloys (xws li Inconel 600, 601) yog siv los ua cov hlau honeycomb carrier, hloov cov khoom siv ceramic.
Cov alloys tuaj yeem tiv taus qhov kub thiab txias tsis tu ncua (txog 1000 degree) thiab thermal shocks thaum lub cav pib- nres cycles, thiab lawv cov thermal conductivity siab ua kom muaj qhov sib txawv ntawm qhov kub thiab txias, txhim kho catalytic efficiency. Tsis tas li ntawd, lawv muaj kev tiv thaiv zoo rau cov kua qaub (piv txwv li, sulfur oxides, nitrogen oxides).
Exhaust manifold liners thiab txuas cov kav dej
Lub tso pa tawm ncaj qha sau siab - qhov kub ntawm cov pa tso pa tawm ntawm lub tog raj kheej lub cav, nrog kev ua haujlwm kub txog 800-900℃. Nickel-raws li alloys (piv txwv li, Hastelloy X, Inconel 718) yog siv los ua liners lossis ib qho manifolds kom tiv taus siab - kub oxidation thiab thermal qaug zog.
Piv nrog rau cov hlau tsis muaj steel, npib tsib xee-raws li alloys muaj kev nkag tau zoo dua ntawm qhov kub thiab txias, tsis txhob deformation thiab tawg los ntawm lub sijhawm ntev - thermal stress. Lawv kuj tiv thaiv corrosion los ntawm condensed acidic dej tsim thaum lub caij txias pib.
Diesel particulate filter (DPF) Cheebtsam
Rau cov cav diesel, DPF yog siv los ntes cov teeb meem hauv cov pa tawm. Nickel-raws li alloy fibers (piv txwv li, alloy 617) yog siv los ua cov ntaub ntawv lim lossis cov khoom siv ntxiv.
Cov alloys muaj siab - kub lub zog thiab oxidation tsis kam, thiab tuaj yeem tiv taus qhov kub thiab txias (txog 1200 degree) tsim thaum lub sij hawm DPF regeneration (combustion ntawm cov khoom seem), thaum tiv thaiv corrosion los ntawm leej faj- muaj cov pa roj.
Sensors thiab actuators nyob rau hauv cov pa kev kho tshuab
Cov sensors tseem ceeb (piv txwv li, oxygen sensors, NOₓ sensors) thiab actuators nyob rau hauv lub tshuab tso pa yuav tsum tau cov ntaub ntawv uas ruaj khov nyob rau hauv high kub. Nickel-raws li alloys (xws li Inconel 625) yog siv los ua lub tes tsho tiv thaiv sensor thiab cov khoom siv hluav taws xob.
Lawv tuaj yeem tswj hwm kev ncaj ncees nyob rau hauv siab - qhov kub thiab txias corrosive ib puag ncig, kom ntseeg tau tias qhov tseeb thiab ruaj khov ntawm cov sensors thiab actuators tau ntev.
