1. Dab tsi yog qhov sib txawv ntawm Nickel ntawm Nickel 200 thiab Nickel 201, thiab yuav ua li cas cov ntaub ntawv sau lawv daim ntawv sau rau lub nkoj siab lirication?
Qhov tseem ceeb tshaj yog lawv cov ntsiab lus carbon, uas ncaj qha dictates lawv kev pabcuam kub thiab txias. Nickel 200 (tsis yog tshaj plaws N02200) muaj cov ntsiab lus carbon ntau tshaj plaws ntawm 0.15%, thaum Nickel 201 (tsis yog N0220) yog qhov tsawg dua ntawm cov khoom siv ntawm 0.02%.
Qhov sib txawv no yog qhov tseem ceeb thaum xaiv phaj rau cov khoom muag zoo li cov khoom siv siab zoo li cov hlab ntsha siab zoo li cov nkoj siab, cov tshuaj tiv thaiv, thiab tso tsheb hlau luam, thiab tso tsheb hlau luam, thiab tso tsheb hlau luam, thiab tso tsheb hlau luam, thiab tso tsheb hlau luam, thiab tso tsheb hlau luam, thiab tso tsheb hlau luam, thiab tso tsheb hlau luam, thiab tso tsheb hlau luam, thiab tso tsheb hlau luam, thiab tso tsheb hlau luam, thiab tso tsheb hlau luam, thiab tso tsheb hlau luam, thiab tso tsheb hlau luam, thiab tso tsheb hlau luam, thiab tso tsheb hlau luam, thiab tso tsheb hlau luam, thiab tso tsheb hlau luam, thiab tso tsheb hlau luam, thiab tso tsheb hlau luam, thiab tso tsheb hlau luam, thiab tso tsheb hlau luam. Thaum nce qhov kub siab (feem ntau saum toj no 600℃F lossis 315 degree), cov pa roj carbon hauv tsib caug xyoo 200 tuaj yeem ua rau cov ciaj ciam nplej, sib sau graphite. Tus txheej txheem no, hu ua "Graphitization," embrittles cov hlau, txo nws lub zog thiab cuam tshuam lub zog. Rau lub nkoj siab loj ua los ntawm phaj, qhov no tuaj yeem ua rau kev puas tsuaj, tsis muaj peev xwm tsis muaj kev ntxhov siab.
Yog li, txoj cai thov yuav ncaj:
Nickel 200 phaj: siv rau kev pabcuam kub hauv qab 600℃f (315 degree). Nws yog tus nqi -}}}} Qhov kev xaiv zoo rau corrosion tsis kam ntawm qis dua kub uas nws cov khoom siv neeg siv tau.
Nickel 201 Caj: Yuav tsum tau rau kev pabcuam kub siab tshaj 600℃f (315 degree). Nws cov ultra {{4 {}} Cov ntsiab lus muaj roj carbon tsawg tiv thaiv cov teeb meem phom sij, ua kom ntev}}}} lub micritional stability thiab nruj.
Thaum muab ib lub nkoj uas yuav ua haujlwm ntawm ambient lossis muaj mob kub, npib tsib xee 200 phaj feem ntau tau teev tseg. Txawm li cas los xij, yog tias tus txheej txheem cuam tshuam ntau kub, xws li nyob rau hauv ib tug caustic evaporator, cov qauv tshuaj yuav tsum muaj kev ncaj ncees thiab kev nyab xeeb ntawm cov khoom siv nyiaj.
2. Nyob rau hauv uas cov kev pab cuam corosive yog phaj Tshuag tau los ntawm Nickel 200 cov khoom ntawm kev xaiv rau cov txheej txheem coricating?
Nickel 200 lub phaj tau teev rau nws cov kev tshwj xeeb tsis kam mus rau ntau qhov kev xeb ib puag ncig, tshwj xeeb tshaj plaws qhov twg qhov twg stainless hlau swb. Nws cov ntsiab lus Nickel siab (ntau dua 99.0%) muab ib qho teeb meem tshwj xeeb ntawm kev corrosion {}} Cov khoom tiv thaiv.
Cov ntawv thov tseem ceeb muaj xws li:
Caustic dej qab zib (sodium hydroxide) tuav: Qhov no yog daim ntawv thov thawj. Nickel 200 cov khoom pov thawj tshwj xeeb ntawm cov nqi qis hauv plab hauv txhua qhov siab ntawm caustic dej qab zib, mus txog rau nws lub boiling point. Cov tso tsheb hlau loj loj, ua rau cov hlab ntsha loj, thiab ua cov kettles feem ntau raws li cov npe npib tsib xee 200 phaj rau kev tuav thiab ua NAOH. Nws yog tsis muaj zog rau qhov kev ntxhov siab corrosion uas ua rau cov hlau uas tsis muaj feem cuam tshuam hauv qhov chaw ib puag ncig no.
Cov zaub mov thiab cov roj fatty acid ua: Nickel 200 tau siv dav hauv cov khoom siv rau kev tsim cov roj ntsha, ua kom luv, thiab lwm yam fatty acids. Nws tiv thaiv corrosion los ntawm organic acids thiab txwv tsis pub cov khoom paug (catalyzed los ntawm lwm cov hlau) uas tuaj yeem ua rau muaj kev kub ntxhov lossis tshem tawm. Nws tsis - rease reassive xwm pab tswj cov khoom siv huv.
Cov khoom siv hluavtaws: hauv cov txheej txheem xws li Rayon Production, kev txhoj num ib puag ncig muaj kev sib cav sib ceg. Cov hlab ntsha thiab kev tso tsheb hlau luam tawm los ntawm Nickel 200 Phaj muab qhov tsim nyog ntev thiab corrosion tsis kam.
Alkaline ntsev thiab tsis {- oxidizing ib puag ncig, ua rau nws tsim nyog rau cov neeg ua haujlwm thiab crystallizers hauv cov tshuaj thiab cov tshuaj lag luam.
Qhov kev txiav txim siab siv Nickel 200 phaj tshaj tus kav hlau tsis xeb, pitting los ntawm kev yuav tsum tau tiv thaiv kev ua kom tawg nyob rau hauv cov alkaline thiab organic ib puag ncig.
3. Dab tsi yog qhov tseem ceeb tsim thiab kev tsim khoom zoo nkauj rau npib tsib xee 200 phaj, thiab kev sim dab tsi yog qhov kev kuaj mob thaum muaj ntawv pov thawj?
Kev tsim khoom thiab muab cov Nickel 200 phaj rau kev siv yog tswj hwm los ntawm cov qauv hlua thoob ntiaj teb uas ua kom zoo, thiab kev ua haujlwm.
Tus thawj coj thawj coj yog Asm B162, "tus qauv kev tshwj xeeb rau lub phaj npib tsib xee, ntawv, thiab sawb." Daim ntawv no cov ntsiab lus cov cai rau:
Tshuaj lom neeg tshuaj: Nws qhia txog kev txwv tsis pub muaj rau npib tsib xee, tus kws tooj liab, hlau, thiab lwm yam kab, thiab lwm yam kab, thiab lwm yam kab mob qog ua raws li cov khoom siv N02200.
Cov cuab yeej kho tshuab: nws txhais qhov tsawg kawg nkaus lub zog, kom muaj zog: 55 ksi min, yield zog: 15 ksi min, elongation: 40% min hauv 2 nti).
Qhov seem tsis muaj kev zam txim: nws tau tshaj tawm cov kev hloov tau zoo hauv cov kev hloov kho tuab, dav, thiab ntev rau cov phiaj.
Rau cov ntawv thov siab rau lub nkoj siab, tus qauv no tau saws los ntawm cov asme boiler thiab siab lub siab code li SB-162.
Kev soj ntsuam tseem ceeb rau cov ntawv pov thawj muaj xws li:
Tshuaj Ntsuam Xyuas Tshuaj: Ib qho qauv los ntawm txhua qhov kub ntawm cov hlau yog tshuaj ntsuam kom paub tseeb cov muaj pes tsawg leeg.
Tensile Xeem: ua kom paub meej tias cov khoom siv neeg kho tshuab tau raws li tus qauv.
Kev ntsuas hardness: feem ntau ua raws li kev kuaj ntxiv.
Tsis - Kev Kuaj (NDT): Rau cov ntawv thov tseem ceeb, lub phaj yuav raug kuaj rau cov lamination sab hauv lossis suav nrog.
Cov chaw tsim khoom yuav tsum muab daim ntawv pov thawj zeb xeem (MTC) cov ntaub ntawv no txhua qhov kev xeem no, muab kev sib tw los ntawm lub phaj rov qab los rau thawj cov hlau.
4. Dab tsi yog cov kev txiav txim siab tseem ceeb rau vuam thiab sib sau Nickel 200 phaj thaum lub sijhawm fabrication ntawm cov khoom loj?
Fabricating Nickel 200 lub phaj yuav tsum muaj cov tswv yim tshwj xeeb uas tau siv rau cov roj carbon lossis stainless hlau zoo li thermal nthuav dav thiab qis thermal conductivity.
Vuam txiav txim siab:
Muab tub lim hlau: cov muab tub lim rau Vuam ob leeg 200 rau nws tus kheej yog Eni-1 rau Smaw) lossis Enni-1 rau GTAW (Tig). Cov kev sib xyaw ua ke no pab tswj kev txhim kho corrosion tsis kam nyob rau hauv thaj chaw weld.
Kev nyiam huv: Qhov no yog qhov tseem ceeb. Txhua thaj chaw muaj kev cia siab yuav tsum muaj kev phom sij xws li roj, roj, pleev xim, thiab tseem ceeb tshaj plaws, kos duab hlau los ntawm cov hlau tooling. Funless Stainless Hlau Txhuam Hniav Thiab Cov kuab tshuaj yuav tsum tau siv.
Cov Qauv Sib Xws & Tshav Kub Kub: Siv cov nyiam sib cav uas dav dav kom haum raws li Wooder Pas Dej Weld Faib. Ua haujlwm rau "cov hlua khi ko taw" cov txheej txheem nrog tsawg rau me ntsis sov tawm tswv yim. Zam kev tawm heev tab sis, vim nws tuaj yeem tshaj li Weld hlau, ua rau kev sib cais ntawm kev tsis txaus siab thiab muaj peev xwm tawg.
Preheat / interpass Kub: Preheat feem ntau tsis tas yuav tsum tau. Lub interpet kub yuav tsum tau tswj thiab khaws qis, feem ntau qis dua 150 qib f (65 degree), los tiv thaiv kev loj hlob ntau dhau.
Ua kev txiav txim siab:
Nickel 200 lub phaj muaj qhov ductility zoo dua thiab tuaj yeem txias - muaj tsim cov khoom siv cov khoom siv.
Txawm li cas los xij, nws txoj haujlwm hnyav ua haujlwm yog qhov tseem ceeb. Ib nrab -}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}} ece} Txoj Cai Kev Ua Haujlwm Loj Los Rov Ua Dua Tshiab thiab tiv thaiv kev tawg.
Qhov kev kub ntxhov rau Nickel 200 yog feem ntau ntawm 1300℃F thiab 1670℃(705 degree), ua raws li los ntawm kev txias nrawm (quenching) kom tsis txhob muaj graphitization hauv qhov tseem ceeb hauv qhov chaw.
5.
Kev sib xyaw ntawm corrosion tsis kam, siab thermal thiab hluav taws xob conductivies, thiab sib nqus cov khoom ua rau Nickel 200 phaj muaj txiaj ntsig zoo nyob rau hauv ntau cov thev naus laus zis.
Aerospace thiab defense: Nickel 200 yog siv nyob rau hauv cov pob zeb ua ke thiab lub dav hlau tsis kam mus rau qee qhov kev ua kom muaj zog thiab nws cov kev sib nqus qis. Qhov kev tso cai tsawg no yog qhov tseem ceeb rau cov khoom siv ze cov kev taw qhia sib txawv thiab kev tshawb fawb.
Cov khoom siv hluav taws xob thiab tshuab hluav taws xob: nws txoj kev ua hluav taws xob zoo ua rau siv rau cov khoom siv roj teeb, thiab nws cov khoom sib nqus yog siv cov ntawv thov tiv thaiv. Daim hlau tuaj yeem yog machined rau hauv thav teb lossis vaj tse rau cov tshuab hluav taws xob tshwj xeeb.
Caustic fusion crucibles thiab khoom siv: hauv kev ntsuas cov khoom siv rau cov crucails thiab cov hlab ntsha siv nyob rau hauv caustic fuster cov txheej txheem, uas qhov twg yog cov qauv yog yaj hauv molten caustic. Daim phiaj phaj tso cai rau rau kev fabrication ntawm kev cai, rase cruciles.
Hloov mus thiab tuav cov ntsev: hauv qhov kev tshawb fawb kub thiab qib siab, cov txheej txheem kev txhim kho thiab hloov cov kab rau cov ntsev kom meej.
Hauv cov ntawv thov no cov kev siv Nicke, Nickel 200 tsis yog tsuas yog kho cov khoom siv, xaiv rau qhov ua tau zoo thiab kev ntseeg tau ntawm qhov siab- technology tshuab.
