1. Dab tsi yog qhov tseem ceeb ntawm cov tshuaj muaj pes tsawg leeg thiab cov ntsiab lus tseem ceeb ntawm Hastelloy G30, thiab lawv yuav txiav txim siab nws qhov kev ua tau zoo li cas?
Hastelloy G30 (UNS N06030) yog npib tsib xee-raws li superalloy nrog cov tshuaj sib xyaw ua kom zoo sib xws tsim los rau ntau yam tshwj xeeb- corrosion kuj. Nws cov nominal muaj pes tsawg leeg yog kwv yees li 43% Nickel (Ni), uas muab lub hauv paus austenitic matrix thiab inherent tsis kam rau txo qhov chaw. Cov ntsiab lus tseem ceeb ntawm alloying suav nrog 30% Chromium (Cr) rau kev ua haujlwm zoo rau oxidizing media, kub sulfuric acid, thiab nitric acid. Nws muaj nyob ib ncig ntawm 5.5% Molybdenum (Mo) thiab 1.7% Tungsten (W), uas sib koom ua ke txhim khu kev tiv thaiv rau thaj chaw pitting thiab crevice corrosion hauv chloride- muaj ib puag ncig. Ib qho tseem ceeb yog nws cov ntsiab lus Cobalt (Co) siab (~ 5%), uas ua rau muaj kev sib zog ua kom muaj zog. Qhov tseem ceeb, nws muaj cov ntsiab lus Carbon tsawg heev (C) thiab ntxiv ntawm Niobium (Nb) rau stabilization, uas ua rau txo qis kev cuam tshuam rau intergranular corrosion hauv tshav kub- thaj chaw cuam tshuam (HAZ) tom qab vuam. Qhov kev sib xyaw ua ke no ua rau G30 round bar tshwj xeeb rau kev tuav cov tshuaj sib xyaw ua ke uas muaj sulfuric, nitric, thiab hydrofluoric acids, nrog rau phosphoric acid ib puag ncig uas muaj halides. Daim ntawv puag ncig muab cov chemistry no nyob rau hauv ntau yam khoom lag luam rau kev ua haujlwm rau hauv cov khoom xws li twj tso kua mis, valve stems, thiab reactor internals.
2. Hauv cov ntawv thov tshwj xeeb twg yog Hastelloy G30 Round Bar suav tias yog cov khoom siv tseem ceeb ntawm kev tsim kho, thiab vim li cas?
Hastelloy G30 puag ncig bar yog qhov tseem ceeb hauv ob peb lub siab -corrosion industries uas qhov kev ncaj ncees ntawm cov khoom tsis yog -negotiable. Nws thawj daim ntawv thov yog nyob rau hauv Kev Lag Luam Kev Lag Luam Tshuaj (CPI) rau cov cuab yeej siv los cuam tshuam cov kua qaub sib tov. Qhov no suav nrog:
Phosphoric Acid Production: Nws yog siv rau agitator shafts, twj impellers, thiab fasteners nyob rau hauv evaporators thiab concentrators tuav ntub - txheej txheem phosphoric acid, uas muaj corrosive fluorides thiab chlorides.
Sulfuric Acid Pickling & Recovery: Hauv cov nroj tsuag hlau pickling thiab cov kua qaub rov qab (xws li cov siv SX-EW txheej txheem), G30 tuav yog machined rau hauv cov khoom tseem ceeb uas tiv taus kub, paug sulfuric acid.
Mixed Acid Environments: Nws yog teev rau li qub, spools, thiab stems nyob rau hauv cov txheej txheem kev sib tov ntawm nitric thiab hydrofluoric acids (xws li, nyob rau hauv stainless hlau pickling los yog uranium ua) los yog sulfuric thiab nitric acids.
Nuclear Roj Reprocessing: Nws tsis kam rau nitric acid thiab cov khoom fission tshwj xeeb ua rau nws haum rau qee yam khoom siv.
Kev Tiv Thaiv Kev Ua qias tuaj (FGD - Flue Gas Desulfurization): Txawm tias tsis yog rau tag nrho cov tshuab ntxhua khaub ncaws, G30 round bar yog siv rau cov khoom tseem ceeb sab hauv hauv qhov hnyav tshaj plaws, chloride-laden zones ntawm advanced FGD systems.
Daim ntawv puag ncig yog qhov tseem ceeb ntawm no vim tias nws tso cai rau kev ua haujlwm ncaj qha ntawm siab - lub zog, qhov chaw monolithic -xws li cov ncej ntev lossis cov ntsia hlau loj - uas yuav tsum muaj cov khoom siv zoo ib yam thoob plaws hauv lawv cov ntoo khaub lig- ntu, kom tsis txhob muaj txoj hauv kev los yog cov ntsiab lus tsis muaj zog uas tuaj yeem tshwm sim los ntawm welded fabrications.
3. Dab tsi yog qhov tseem ceeb ntawm cov khoom siv kho tshuab thiab lub cev ntawm Hastelloy G30 Round Bar ntawm qhov kub thiab txias, thiab lawv cuam tshuam rau kev siv tshuab thiab kev tsim khoom li cas?
Hastelloy G30 puag ncig tuav nthuav tawm ib qho tshwj xeeb ntawm cov khoom siv kho tshuab thiab lub cev. Nyob rau hauv cov xwm txheej annealed, ib txwm chav tsev kub tensile zog yog nyob ib ncig ntawm 85-100 ksi (586-689 MPa), nrog ib tug yield zog ntawm 40-45 ksi (276-310 MPa) thiab zoo heev elongation (Ntau tshaj los yog sib npaug rau 40%). Nws tuav lub zog muaj txiaj ntsig txog li 1200℃F (650 degree). Nws lub cev muaj zog muaj xws li qhov ceev ntawm 0.305 lb / in³ (8.44 g / cm³), qhov nruab nrab thermal expansion coefficient, thiab thermal conductivity qis dua hlau, uas yog ib qho tseem ceeb thaum lub sij hawm machining thiab vuam.
Cov khoom no ncaj qha cuam tshuam rau fabrication:
Machining: G30 ua hauj lwm- hardens sai, yuav tsum tau nruj lub tshuab teeb, ntse zoo- rake carbide cov cuab yeej, qeeb ceev, thiab hnyav, zoo ib yam feeds ua hauj lwm nyob rau hauv lub hardened nto txheej. Kev txaus coolant txaus yog yuav tsum tau los tswj cov cua sov buildup. Cov thermal conductivity tsawg txhais tau hais tias cua sov concentrates ntawm qhov txiav, xav tau cov khoom siv thiab cov duab geometry tsim los rau siab - kub alloys.
Vuam: Nws nthuav tawm zoo weldability siv cov txheej txheem xws li GTAW (TIG) thiab GMAW (MIG). Txawm li cas los xij, nws cov ntsiab lus siab nickel thiab chromium thiab cov thermal conductivity tsawg yuav tsum tau ceev faj tswj cov cua sov. Sib piv cov hlau nplaum xws li G30 lossis ERNiCrMo-11 yog tus qauv. Post-weld kev kho cua sov feem ntau tsis tas yuav tsum tau vim nws cov pa roj carbon tsawg thiab Nb-stabilized chemistry, uas tiv thaiv carbide nag lossis daus hauv HAZ.
4. Yuav ua li cas corrosion tsis kam ntawm Hastelloy G30 piv rau ntau cov alloys xws li 316L Stainless hlau los yog Hastelloy C-276, tshwj xeeb tshaj yog nyob rau hauv cov kev pab cuam sib xyaw acid?
Hastelloy G30 tuav ib qho tshwj xeeb niche ntawm cov qauv stainless hlau thiab cov molybdenum ntau dua -npib tsib xee alloys. Kev sib piv ncaj qha yog nthuav tawm:
vs. 316L Stainless hlau: G30 yog qhov zoo tshaj plaws hauv txhua qhov kev pabcuam kub, muaj zog acid, tshwj xeeb tshaj yog cov uas muaj cov tshuaj oxidizing thiab halides . 316L yuav raug kev txom nyem loj thiab pitting/crevice corrosion nyob rau hauv kub sulfuric acid thiab chloride ib puag ncig qhov twg G30 excels. G30 yog txoj kev txhim kho thaum 316L ua tsis tiav.
vs. Hastelloy C-276 (UNS N10276): Qhov no yog qhov sib piv ntau dua. C-276, nrog ~ 15.5% Mo, muaj kev tiv thaiv zoo tshaj plaws rau kev txo qis ib puag ncig zoo li kub hydrochloric acid thiab hnyav pitting hauv nruab nrab / acidic chlorides. Txawm li cas los xij, G30 ua tau zoo tshaj C-276 hauv oxidizing acids thiab complex mixed acids. Nws cov chromium siab (30% vs . 15.5% hauv C-276) muab nws ruaj khov, tiv thaiv oxide txheej hauv nitric acid thiab oxidizing sulfuric acid. Hauv kev lag luam phosphoric acid, qhov twg fluorides thiab chlorides tsim ib qho kev sib xyaw oxidizing, G30 feem ntau yog qhov kev xaiv tshaj C-276. Yog li ntawd, G30 puag ncig bar tau teev tseg tsis yog lub hom phiaj dav dav corrosion, tab sis tshwj xeeb rau oxidizing lossis complex tov-acid chemisries qhov twg nws cov high-Cr, nruab nrab-Mo tshuav nyiaj li cas yog qhov zoo.
5. Dab tsi yog qhov tseem ceeb ntawm kev yuav khoom, kev sim, thiab kev txiav txim siab thaum muab Hastelloy G30 Round Bar rau kev pabcuam tseem ceeb?
Vim nws daim ntawv thov nyob rau hauv kev nyab xeeb - tseem ceeb, siab - ib puag ncig corrosion, kev yuav khoom nruj thiab cov txheej txheem pov thawj yog qhov yuav tsum tau ua.
Cov ntaub ntawv pov thawj: Lub voj voog puag ncig yuav tsum tau muab nrog daim ntawv pov thawj Cov Khoom Siv Xeem Xeem (MTR) / Daim Ntawv Pov Thawj Zeb Xeem uas ua raws li cov qauv zoo li ASTM B472 (Nickel Alloy Billets thiab Bars). Qhov MTR no yuav tsum sau cov tshuaj tiv thaiv hluav taws xob tiag tiag kom paub tseeb tias nws ua tau raws li UNS N06030 cov lus qhia tshwj xeeb, suav nrog cov pa roj carbon tsawg thiab kab kawm.
Kev Ntsuas Kev Ntsuas: Tshaj li chemistry, kev ntsuas cov cuab yeej cuab tam (tensile, hardness) raws li kev yuav khoom (xws li, ASTM B573 rau pas nrig) yog tus qauv. Rau cov khoom tseem ceeb, kev kuaj ntxiv tuaj yeem raug teev tseg:
Kev kuaj Corrosion: Ntau-Kev kuaj corrosion tshwj xeeb hauv cov txheej txheem simulated tej zaum yuav xav tau.
Tsis yog-Kev Ntsuam Xyuas Kev Puas Tsuaj (NDT): Rau siab- qhov chaw ncaj ncees, cov kab puag ncig tej zaum yuav raug kuaj ultrasonic (UT) txhawm rau txheeb xyuas qhov cuam tshuam sab hauv lossis eddy tam sim no kuaj (ET) rau saum npoo thiab ze ntawm - qhov chaw tsis zoo.
Traceability: Tag nrho traceability los ntawm cov cua sov mus rau qhov kawg bar yog qhov tseem ceeb. Qhov no suav nrog cov xov tooj cua sov, txoj hauv kev ua zeb, thiab qhov ntev.
Qhov xwm txheej: Cov khoom siv tshwj xeeb yuav tsum tau hais meej meej txog qhov yuav tsum tau ua - feem ntau yog cov tshuaj annealed rau qhov zoo tshaj plaws corrosion resistance- thiab qhov tiav (xws li, kub tiav, tig, av, los yog polished).
Kev Tsim Nyog Muaj Peev Xwm: Nws yog qhov muaj txiaj ntsig zoo los ntawm cov khoom lag luam muaj koob npe lossis ncaj qha los ntawm cov mills nrog cov pov thawj kev tswj hwm zoo (xws li AS9100, ISO 9001) thiab kev paub txog kev ua haujlwm siab - alloys. Kev pov thawj ntawm daim ntawv pov thawj los ntawm kev lees paub ncaj qha rau zeb yog qhov kev coj ua zoo tshaj plaws kom tsis txhob hloov cov khoom siv.
