1. Vim li cas nws thiaj li tsis tuaj yeem muab ib qho "Nqi Ib Kg" rau cov kav dej thiab cov kav dej nickel alloy?
Kev muab ib tus nqi ib kilogram tsis ua tau vim yog kev sib cuam tshuam ntawm ntau yam uas txiav txim siab tus nqi kawg. Tus nqi tsis yog rau cov hlau nyoos xwb tab sis rau kev ua tiav tag nrho, kuaj, thiab muaj ntawv pov thawj cov khoom lag luam. Cov kev hloov pauv tseem ceeb muaj xws li:
1. Raw Material (Alloy) Tus Nqi: Qhov no yog tus nqi qis ntawm "kua nplaum," uas tau tsav los ntawm London Hlau Txauv (LME) cov nqi rau Nickel, Molybdenum, Cobalt, thiab Chromium. Alloys nrog cov ntsiab lus siab ntawm cov khoom kim heev xws li Molybdenum (C-276, 625) lossis Cobalt (qib qib) muaj tus nqi qis dua.
2. Cov txheej txheem tsim khoom & complexity:
Seamless vs. Welded: Seamless kav, tsim los ntawm extrusion los yog tho, yog ntau nyuaj thiab kim los tsim dua welded kav los ntawm dov daim ntawv.
Qhov Loj thiab Phab Ntsa Thickness: Ua nyias- cov raj phab ntsa lossis cov kav dej loj heev yuav tsum tau siv thev naus laus zis ntau dua thiab muaj cov txiaj ntsig qis dua, nce tus nqi.
Tolerance thiab Finish: Tight dimensional tolerances los yog tshwj xeeb nto finishes (xws li, polished, pickled) ntxiv nqi.
3. Muaj nuj nqis thiab kev yuav Channel: Cov phiaj xwm loj loj hais kom tus nqi zoo dua me me, ib qho - tawm kev yuav khoom. Kev yuav ncaj qha los ntawm lub zeb yog txawv los ntawm kev yuav los ntawm tus neeg muag khoom lossis tus muag khoom.
4. Kev Ntsuas thiab Ntawv Pov Thawj: Cov Ntawv Pov Thawj Zeb Xeem Xeem (MTC) suav nrog, tab sis kev sim ntxiv xws li PMI (Positive Material Identification), NDT (Ultrasonic, Eddy Tam Sim No), lossis thib peb - kev tshuaj xyuas tog ntxiv tus nqi.
5. Kev Ua Lag Luam Dynamics: Geopolitical yam, cov saw hlau tsis muaj zog, thiab kev thov thoob ntiaj teb ua rau cov nqi hloov pauv txhua hnub.
2. Koj puas tuaj yeem muab cov nqi txheeb ze ntawm cov alloys los ntawm qhov tsawg tshaj plaws mus rau kim tshaj?
Yog lawm. Cov qeb duas hauv qab no yog nyob ntawm tus nqi txheeb ze ntawm cov khoom siv raw alloying thiab qhov nyuaj ntawm lawv cov kev tsim khoom (xws li, kev kho cua sov). Tus nqi yog ib kilogram ntawm cov yeeb nkab tiav / raj.
Tus nqi txheeb ze (qis mus rau siab):
Incoloy 800/800H: Cov ntsiab lus qis nickel, cov ntsiab lus hlau siab. Tus nqi ntau tshaj - siv tau rau siab - cov ntawv thov kub.
Inconel 600: Ib qho yooj yim npib tsib xee-chromium alloy tsis muaj tus nqi siab- ntxiv ntawm molybdenum lossis niobium.
Monel 400: Cov ntsiab lus nickel siab, tab sis nws cov tooj liab ntxiv yog tsawg dua li molybdenum lossis cobalt.
Incoloy 825: Zoo ib yam li 800 tab sis nrog ntxiv molybdenum thiab tooj liab, txav nws mus rau tus nqi ntaiv.
Inconel 601: Txhim kho nrog txhuas, ua rau nws nyuaj thiab me ntsis kim dua 600.
Inconel 625: Cov ntsiab lus siab ntawm Molybdenum (~ 9%) thiab Niobium nce nws cov nqi hauv paus. Nws cov machinability tsis zoo kuj ntxiv rau cov nqi ua haujlwm.
Inconel 718: Cov nag lossis daus- cov hlau hnyav uas yuav tsum tau muaj kev sib tw, ntau- kauj ruam kev kho cua sov. Qhov kev ua haujlwm tshwj xeeb no ua rau nws kim dua 625, txawm hais tias muaj qhov zoo sib xws hauv chemistry.
Inconel X-750 / 725: Zoo ib yam li 718, cov no yog cov hnub nyoog-hardenable alloys. Alloy 725, nrog kev tiv thaiv corrosion ntau dua, feem ntau hais kom tus nqi tshaj X-750 thiab 718.
Hastelloy C-276: Muaj cov qib siab ntawm Molybdenum (~ 16%) thiab Tungsten (~ 4%), ob qho ntawm cov khoom siv kim tshaj plaws. Nws yog feem ntau kim tshaj alloy nyob rau hauv daim ntawv no ib kilogram.
3. Rau ib pob nyiaj siv -paub qhov project xav tau kev tiv thaiv corrosion, dab tsi yog qhov kev cuam tshuam ntawm cov nqi qeb?
Qhov qeb duas hais kom nruj "haum-rau- lub hom phiaj" txheej txheem xaiv kom tsis txhob dhau - qhia thiab tshaj - kev siv nyiaj.
Tsis txhob ua rau lub "zoo tshaj" alloy. Siv Hastelloy C-276 qhov twg Incoloy 825 txaus yog qhov peev txheej loj thiab tsis tsim nyog.
Ua Kev Ntsuam Xyuas Corrosion: Kom meej meej cov tshuaj ib puag ncig (pH, kub, chloride concentration, muaj oxidizers). Piv txwv li:
Dilute Caustic Soda ntawm Ambient Kub? Incoloy 800 tej zaum yuav ua kom txaus, txuag nqi tshaj Monel 400.
Seawater Service? Inconel 625 yog qhov zoo heev, tab sis ib qho super duplex stainless hlau (xws li UNS S32750) tuaj yeem muab kev tiv thaiv txaus ntawm tus nqi qis dua.
Sulfuric Acid Service? Incoloy 825 yog tus kws tshaj lij, tab sis yog tias muaj mob hnyav heev, tus nqi them rau Hastelloy C-276 yog qhov tsim nyog los tiv thaiv kev ua tsis tiav.
Xav txog Clad lossis Lined Yeeb Nkab: Rau cov kab loj loj, cov yeeb nkab carbon steel nrog nyias sab hauv cladding ntawm cov hwm zoo (xws li C-}276 lossis 625) tuaj yeem yog cov kev daws teeb meem zoo heev, muab kev tiv thaiv corrosion nyob qhov twg nws xav tau yam tsis muaj nqi ntawm cov phab ntsa.
4. Tshaj li cov khoom siv raw, lwm yam nqi dab tsi yog "pob ntseg" hauv tus nqi siab -kev ua tau zoo nickel alloy raj?
Tus nqi ib kg suav nrog ntau qhov tseem ceeb, tus nqi - ntxiv cov txheej txheem uas tseem ceeb rau kev ntseeg tau:
1. Kev kho cua sov: Kev daws teeb meem annealing, quenching, thiab nag lossis daus hardening (rau 718, 725, X-750) yog cov txheej txheem siv zog thiab tswj nruj heev uas yog ib feem tseem ceeb ntawm tus nqi.
2. Kev Pov Hwm Zoo thiab Kev Ntsuas: Qhov no yog tus tsav tsheb loj. Nws suav nrog:
Tsis yog-Kev Ntsuas Kev Ua Phem (NDT): Kev kuaj ultrasonic rau cov kav dej seamless, eddy tam sim no rau cov raj.
Hydrostatic Testing: Kev ntsuas siab txhua qhov ntev ntawm cov yeeb nkab.
Daim ntawv pov thawj: Tsim thiab txheeb xyuas daim ntawv pov thawj Mill Test (MTC) rau ASTM / ASME cov qauv.
3. Kev ua haujlwm tsis zoo: Nickel alloys tsis yooj yim rau lub tshuab (lawv ua haujlwm- tawv sai). Qhov no nce tus nqi ntawm kev txiav, beveling, thiab threading cov yeeb nkab kawg piv rau carbon steel.
5. Tus neeg yuav khoom yuav ua li cas thiaj li yuav tau cov khoom no kom lawv tau txais tus nqi ncaj ncees thiab cov khoom zoo?
Lub tswv yim muab kev tshaj lij yog qhov tseem ceeb.
Muab cov lus nug ntxaws: Tsis txhob nug "Inconel 625 yeeb nkab nqi ib kg." Qhia:
Txuj: (xws li ASTM B444 rau 625 yeeb nkab, ASTM B622 rau seamless raj)
Loj: OD, WT, thiab Ntev.
Qib / Cov Txheej Txheem: (piv txwv li, Annealed, Solution Annealed)
Kev Xeem Xeem: (piv txwv li, PMI, NDT hom, Hydrotest siab)
Daim ntawv pov thawj: (piv txwv li, MTC rau EN 10204 3.1)
Tau Txais Ntau Cov Lus Qhia: Tau txais cov lus hais los ntawm cov tuam txhab muaj npe nrov thiab cov neeg tsim khoom tsim. Ceev faj ntawm cov nqi uas zoo li zoo dhau los ua qhov tseeb.
Ua Ntej Tag Nrho Tus Nqi Ntawm Cov Tswv Cuab (TCO): Tus nqi pheej yig tshaj plaws pib tuaj yeem yog qhov kev xaiv kim tshaj plaws yog tias cov khoom ua tsis tiav, ua rau poob qis, kev tsim khoom ploj, thiab kev nyab xeeb. Kev ntseeg tau ntawm cov khoom muaj ntawv pov thawj zoo los ntawm tus neeg muag khoom muaj npe nrov yog tsim nyog tus nqi.
Nkag siab txog Kev Ua Lag Luam: Nco ntsoov tias LME cov nqi nickel tsis hloov pauv. Kev hais lus tsuas yog siv tau rau 24-48 teev.
Xaus: "Tus nqi ib kg" yog qhov pib ntawm kev sib tham txog kev lag luam thiab kev lag luam, tsis yog daim duab kawg. Lub hom phiaj yog los yuav ib daim ntawv pov thawj, haum- rau- cov khoom lag luam uas xa tus nqi qis tshaj plaws hauv lub neej ntawm qhov project, tsis yog tus nqi qis tshaj plaws.
