Cov khoom siv dab tsi yog Inconel 625 alloy hauv Suav teb?
Inconel 625 alloy qhia:
625 Cov hlau no muaj kev tiv thaiv corrosion zoo heev thiab oxidation tsis kam, ob qho tib si muaj zog tensile zoo thiab qaug zog los ntawm qhov kub thiab txias mus rau qhov kub ntawm 980 degree, thiab muaj peev xwm tiv taus kev ntxhov siab corrosion hauv ntsev tsuag cua. Yog li ntawd, nws tuaj yeem siv dav hauv kev tsim khoom ntawm aerospace engine qhov chaw, aerospace structural qhov chaw thiab cov khoom siv tshuaj, nrog rau cov xwm txheej uas nws tau ntsib nrog dej hiav txwv thiab raug rau cov neeg kho tshuab siab.
Inconel 625 alloy tshuaj muaj pes tsawg leeg:
Hom Lub Npe: Inconel 625 (UNS N06625 / W.Nr.2.4856)
Teb chaws tus qauv: UNS American tus qauv: N06625 W. Nr./EN European tus qauv: 2.4856 ASTM: B 443, B 444, B 446, B 564, B 366 AMS: 5599, 5581, 6555, 5837 ASME: SB }, SB - 444, SB-446, SB-564, SB-366 NACE: MR0175-3 ISO: 15156-3
Kev koom tes manufacturers: OUTOKUMPU (Outokumpu), AVESTA (Avesta), American Hastelloy, American SMC, American Metallurgical Alliance ATI, German Thyssenkrupp VDM, Mannex, Deutsche Nickel, Swedish Sandvik, Cov npe nrov xws li Nippon Metallurgy thiab Nippon Steel
chemical muaj pes tsawg leeg:
Chromium Nickel Molybdenum Cobalt Niobium + Tantalum Txhuas Titanium Carbon Iron Manganese Silicon Phosphorus Sulfur
Yam tsawg kawg nkaus tus nqi 20.0 -- 8 0 -- 3 15 -- -- -- -- -- -- -- --
Tus nqi siab tshaj 23.0 Margin 10.0 1.0 4. 9}} 5 0 5 0 015 0.015
Inconel 625 nta:
1. Nws muaj kev tiv thaiv zoo heev tiv thaiv ntau yam corrosive media hauv oxidizing thiab txo qhov chaw.
2. Kev tiv thaiv zoo heev rau pitting corrosion thiab crevice corrosion, thiab yuav tsis tsim kev ntxhov siab corrosion tawg los ntawm chloride
3. Kev tiv thaiv zoo heev rau inorganic acid corrosion, xws li nitric acid, phosphoric acid, sulfuric acid, hydrochloric acid thiab sib xyaw acids ntawm sulfuric acid thiab hydrochloric acid, thiab lwm yam.
4. Zoo heev tiv thaiv corrosion los ntawm ntau yam inorganic acid tov tov
5. Thaum qhov kub nce mus txog 40 degree, nws tuaj yeem pom zoo corrosion kuj nyob rau hauv hydrochloric acid daws ntawm ntau yam concentrations.
6. Zoo processability thiab weldability, tsis muaj tom qab weld tawg rhiab heev
7. Kev tsim cov ntawv pov thawj ntawm cov hlab ntsha siab nrog phab ntsa kub ntawm -196 ~ 450 degree
8. Muaj ntawv pov thawj los ntawm NACE tus qauv ntawm American Society of Corrosion Engineers (MR-01-75) kom ua tau raws li tus txheej txheem siab tshaj plaws VII rau kev siv hauv qhov chaw qaub qaub.
Metallographic qauv: 625 muaj lub ntsej muag-centered cubic lattice qauv. Thaum khaws cia ntawm li 650 degree rau lub sijhawm ntev txaus, cov pa roj carbon monoxide thiab tsis ruaj khov quaternary theem yuav los nag thiab hloov mus rau theem ruaj khov Ni3 (Nb, Ti) orthorhombic lattice. Tom qab cov khoom siv ntxiv dag zog, molybdenum thiab niobium Cheebtsam hauv nickel-chromium matrix yuav txhim kho cov khoom siv ntawm cov khoom, tab sis cov yas yuav raug txo.
Corrosion kuj: Alloy 625 muaj corrosion kuj zoo heev nyob rau hauv ntau yam xov xwm. Nws muaj kev tiv thaiv zoo heev rau pitting corrosion, crevice corrosion, intergranular corrosion thiab chloride nruab nrab corrosion. Nws muaj corrosion kuj zoo rau inorganic acids xws li nitric acid, phosphoric acid, sulfuric acid, hydrochloric acid thiab lwm yam inorganic acids, thiab kuj yog resistant rau alkali thiab organic acid corrosion nyob rau hauv oxidizing thiab txo ib puag ncig. Zoo tiv thaiv chloride ions thiab txo kev ntxhov siab corrosion tawg. Yuav luag tsis muaj corrosion nyob rau hauv seawater thiab industrial gas ib puag ncig, thiab nws muaj siab corrosion kuj rau seawater thiab ntsev tov txawm nyob rau hauv high kub. Tsis muaj rhiab heev thaum vuam. Nws yog resistant rau carbonization thiab oxidation nyob rau hauv static los yog cyclic ib puag ncig, thiab yog resistant rau corrosion los ntawm chlorine-muaj gases.
Kev ua tau zoo thiab cov kev xav tau: Thermal processing
1. Thermal processing temperature range yog 1150 degree ~ 900 degree, thiab txoj kev txias yog dej quenching lossis lwm txoj kev ua kom txias sai.
2. Yuav kom tau txais kev ua haujlwm zoo tshaj plaws thiab kev tiv thaiv corrosion, kev kho annealing yuav tsum tau nqa tawm tom qab ua haujlwm kub.
3. Thaum cua sov, cov khoom tuaj yeem ncaj qha mus rau hauv lub cub tawg uas tau ua kom sov rau qhov siab tshaj plaws ua haujlwm kub. Tom qab khaws cia kom sov rau lub sijhawm txaus (60 feeb ntawm lub sijhawm tuav yog xav tau rau txhua 100mm thickness), nws tuaj yeem tawm sai sai ntawm lub cub tawg thiab ua kom sov hauv qhov kub ntawm qhov ntsuas kub ntawm qhov ntsuas kub. Thaum cov khoom kub poob qis dua qhov kev ua haujlwm thermal, nws yuav tsum tau rov ua dua.
Ua haujlwm txias
1. Cov ntaub ntawv ua haujlwm txias yuav tsum tau muab tshem tawm, thiab lawv qhov kev ua haujlwm hardening yuav tsum siab dua li ntawm austenitic chromium-nickel stainless hlau.
2. Thaum lub sij hawm ua hauj lwm txias, intermediate annealing yog yuav tsum tau.
3. Thaum cov nyiaj ua haujlwm ntau dua 15%, kev kho annealing yuav tsum tau ua tom qab ua haujlwm kub.
Welded
1. Haum rau vuam siv cov txheej txheem vuam tsoos
.2. Cov ntaub ntawv yuav tsum tau welded yuav tsum nyob rau hauv ib tug daws-kho lub xeev, thiab oxide nplai, roj stains thiab ntau yam cim thiab cim yuav tsum tau muab tshem tawm.
3. Kev kho cua sov tsis tas yuav tsum tau ua ntej thiab tom qab vuam.
Daim ntawv thov Scope ntawm Inconel 625 Daim ntawv thov thaj chaw yog: Softened thiab annealed tsawg carbon alloy 625 yog dav siv nyob rau hauv cov tshuaj ua lag luam. Nws zoo corrosion kuj thiab siab zog pab kom nws siv raws li nyias cov yam ntxwv Cheebtsam. Alloy 625 tuaj yeem siv rau qhov chaw raug dej hiav txwv thiab raug rau cov neeg kho tshuab siab.
Tej thaj chaw thov: 1. Chloride-muaj cov txheej txheem tshuaj lom neeg, tshwj xeeb tshaj yog siv cov kua qaub chloride catalysts. 2. Digesters thiab bleaching tanks siv nyob rau hauv lub pulp thiab ntawv kev lag luam. 3. Flue gas desulfurization system. Absorption ntauwd, reheater, flue gas inlet baffle, kiv cua (humidity), stirrer, baffle thiab flue, thiab lwm yam. 4. Siv los tsim cov khoom siv thiab cov khoom siv rau hauv cov roj av acidic 5. Cov tshuaj tiv thaiv ntawm acetic acid thiab acetic anhydride tshwm sim 6. Sulfuric acid condenser.
