1. Dab tsi txawv Hastelloy B "daim ntawv" los ntawm "phaj," thiab cov qauv kev tsim khoom twg tswj hwm nws cov khoom?
Hauv kev lag luam metallurgical, qhov sib txawv ntawm cov ntawv thiab phaj feem ntau yog nyob ntawm thickness, thiab qhov sib txawv no cuam tshuam rau kev tsim khoom, kev siv, thiab kev tuav.
Thickness Distinction rau ASTM B333:
Hastelloy B daim ntawv txhais tau tias yog lub tiaj tus - cov khoom dov nrog lub thickness tsawg dua 3/16 "(4.76mm) tab sis ntau dua 0.020" (0.51mm). Cov ntaub ntawv thinner dua 0.020" feem ntau yog cais raws li "foil" lossis "strip." Phaj, los ntawm qhov sib txawv, yog 3/16" thiab tuab dua.
Cov txheej txheem tsim khoom sib txawv:
Rolling Sequence: Thaum ob daim ntawv thiab phaj pib kub - dov slabs, daim ntawv ntau lawm yuav ntxiv cov khaub thuas dov. Tom qab pib kub dov mus rau nruab nrab thickness, cov khoom yog pickled (acid ntxuav) kom tshem tawm cov nplai thiab ces txias dov rau Sendzimir los yog 4-siab rolling mills kom tiav qhov kawg nyias gauge.
Nto Finish: Txias dov ua kom zoo dua, zoo dua qhov chaw tiav dua li kub dov. Daim ntawv tuaj yeem muab nkag rau hauv ntau qhov tiav:
Tsis yog . 1 Tiav: Kub dov, annealed, thiab descaled (rougher nto).
2B Finish: Txias dov, annealed, pickled, thiab maj mam dov nrog polished yob kom ua tiav ib tug du, matte tiav.
BA (Bright Annealed) Finish: Txias dov thiab annealed nyob rau hauv ib qho chaw tiv thaiv (hydrogen los yog lub nqus tsev vacuum) los tsim ib tug kaj, reflective nto tsis muaj pickling.
Dimensional Tolerances: Daim ntawv yog tuav kom nruj dua thickness dua phaj, feem ntau ± 0.005 "los yog zoo dua, nyob ntawm qhov ntsuas thiab qhov dav.
Kev tswj hwm tus qauv:
Ob daim ntawv thiab phaj yog tswj hwm los ntawm ASTM B333 (Standard Specification rau Nickel-Molybdenum Alloy Phaj, Ntawv, thiab Sawb). Cov qauv no qhia txog:
Cov kev cai tshuaj muaj pes tsawg leeg (UNS N10665).
Mechanical zog (tensile, yield, elongation).
Thaum tshav kub kub kev kho mob tej yam kev mob (kev daws annealed).
Tso cai hloov pauv ntawm qhov ntev thiab qhov hnyav.
Kev ua haujlwm, ua tiav, thiab kev lees paub zoo.
Tus qauv tso cai rau cov kev xav tau ntxiv xws li kev tshuaj xyuas ultrasonic, kev kuaj corrosion ntxiv, lossis nruj dua qhov ntev ntev ntev thaum teev los ntawm tus neeg yuav khoom.
2. Yuav ua li cas lub formability ntawm Hastelloy B daim ntawv piv rau stainless hlau, thiab cov tswv yim dab tsi yog siv los ua tau zoo khoov los yog tsim rau cov txheej txheem tshuaj?
Tsim Hastelloy B daim ntawv rau hauv cov khoom xws li reactor nkoj taub hau, baffles, ductwork, los yog tank linings yuav tsum to taub nws tus cwj pwm txawv mechanical piv rau cov hlau stainless.
Formability yam ntxwv:
Kev ua haujlwm siab dua: Hastelloy B ua haujlwm hnyav dua li austenitic stainless hlau zoo li 304 lossis 316. Qhov no txhais tau hais tias raws li daim ntawv yog khoov lossis tsim, nws yuav muaj zog thiab nyuaj sai heev, yuav tsum muaj kev sib sau ntau dua thiab ua rau muaj kev pheej hmoo ntawm kev tawg yog tias tsim txuas ntxiv yam tsis muaj qhov nruab nrab annealing.
Lower Ductility ntawm Extreme Strains: Thaum B-2 muaj ductility zoo nyob rau hauv lub annealed mob (feem ntau 40-50% elongation), nws ncav cuag nws txoj kev txwv sai dua 304 stainless hlau vim ua hauj lwm ceev ceev.
Springback: Cov hlau muaj zog ntau dua li cov pa roj carbon steel, uas ua rau muaj qhov zoo dua tom qab khoov. Tooling yuav tsum them nyiaj rau qhov no.
Txoj Kev Ua Tau Zoo:
Annealed Condition nkaus xwb: Txhua txoj haujlwm tsim yuav tsum tau ua ntawm daim ntawv nyob rau hauv qhov kev daws teeb meem tag nrho. Cov ntawv txias ua haujlwm (tempered) tsis tsim nyog rau kev ua haujlwm hnyav.
Slow, Controlled Bending: Rau kev sib sau nres (nias braking), siv qeeb khoov nrawm thiab dav dav khoov radii. Qhov tsawg kawg nkaus pom zoo khoov vojvoog yog feem ntau 1.5 mus rau 2 npaug ntawm daim ntawv tuab rau 90℃khoov, txawm tias nruj dua radii tuaj yeem ua tau nrog cov txheej txheem ceev faj.
Kev Tsim Kub Kub rau Cov Duab Loj: Rau cov duab nyuaj xws li sib sib zog nqus- kos taub hau lossis cov kab nkhaus hnyav, kev sib sau kub feem ntau yog ua haujlwm:
Kub: Feem ntau 1600℃F - 2100℃F (870℃- 1150℃).
Kev txiav txim siab: Yog tias qhov kub sib sau ua tiav hauv qab qhov kev daws teeb meem annealing kub (2050℃F), qhov tsim yuav tsum tau rov ua dua - kev daws teeb meem tom qab ntawd kom rov ua kom corrosion thiab tshem tawm cov kev ntxhov siab seem.
Lubrication: Heavy-lub luag haujlwm ua cov roj nplua nyeem (cov roj chlorinated los yog sulfurized) yog qhov tseem ceeb los tiv thaiv galling thiab tuag. Cov no yuav tsum tau muab tshem tawm tag nrho tom qab tsim los tiv thaiv kev sib kis.
Intermediate Annealing: Rau ntau-theem ua haujlwm, daim ntawv yuav xav tau cov tshuaj nruab nrab annealing kom rov ua kom cov ductility tom qab ua haujlwm txias.
3. Hauv daim ntawv thov tshwj xeeb dab tsi yog Hastelloy B daim ntawv nyiam dua lwm cov nickel alloys lossis stainless hlau, tshwj xeeb hauv kev lag luam tshuaj thiab tshuaj zoo?
Hastelloy B daim ntawv pom nws cov niche hauv cov ntawv thov cuam tshuam nrog txo cov kua qaub ntawm qhov kub siab, qhov twg lwm cov ntaub ntawv yuav ua tsis tau sai. Hauv kev lag luam tshuaj thiab tshuaj lom neeg zoo, cov khoom lag luam purity yog qhov tseem ceeb raws li cov cuab yeej siv tau ntev.
Cov ntawv thov nyiam:
Reactor Vessel Linings thiab Cladding: Iav-liab steel reactors muaj nyob rau hauv pharma, tab sis lawv muaj kev cuam tshuam rau thermal poob siab thiab muaj tsawg tshav kub hloov. Hastelloy B daim ntawv yog siv los ua cov ntaub ntawv hauv ob sab phlu (xws li xoob-kab lossis tawg- khi clad) rau cov reactors tuav cov tshuaj tiv thaiv uas muaj hydrochloric acid ua reactant lossis byproduct. Cov nplooj ntawv du yog yooj yim los ntxuav (CIP / SIP - Clean-hauv -Place / Sterilize-hauv -Place) thiab tsis muaj kab mob rhiab rau tshuaj intermediates.
Distillation Kem Internals: Cov tais, lub kaus mom npuas, cov khoom txhawb nqa, thiab cov ntaub qhwv demister fabricated los ntawm Hastelloy B daim ntawv yog siv nyob rau hauv txhua kab sib cais sib tov uas muaj chlorinated organics los yog HCl. Cov ntawv nyias tsim txo qhov hnyav thaum muab siab tshaj plaws corrosion kuj.
Ductwork thiab Scrubber Cheebtsam: Hauv cov nroj tsuag tshuaj zoo, tawm - gases feem ntau muaj HCl vapors. Hastelloy B daim ntawv yog tsim rau hauv ductwork, scrubber vaj tse, thiab kiv cua vaj tse los daws cov corrosive, txo cov roj ntws ntawm qhov kub thiab txias.
Thaum tshav kub kub Exchanger Cheebtsam: Thaum tubing yog ntau dua rau cov tshav kub exchanger nto, Baffle daim hlau thiab cov ntaub ntawv txhawb nqa nyob rau hauv lub plhaub - thiab - raj kub exchangers tuav txo cov xov xwm feem ntau txiav los ntawm B daim ntawv.
Pulsation Dampeners thiab Diaphragms: Hauv metering twj tuav cov tshuaj corrosive, nyias Hastelloy B daim ntawv yog tsim rau hauv diaphragms saj zawg zog los yog pulsation dampener zais zis, leveraging nws corrosion kuj ua ke nrog txaus flexural qaug zog lub neej.
Vim li cas B-2 dhau C-276 lossis Stainless:
Hauv kev pabcuam HCl ntshiab, C-276 (uas muaj chromium thiab tungsten) ua tau corrodes sai dua B-2 vim yog chromium cuam tshuam nrog molybdenum-raws li kev tiv thaiv zaj duab xis. Stainless hlau pits sai sai. B-2 muab tus nqi qis tshaj plaws corrosion thiab yog li qhov kev pab cuam lub neej ntev tshaj plaws thiab kev pheej hmoo tsawg tshaj plaws ntawm cov hlau tsis huv.
4. Cov kev xaiv dab tsi saum npoo av muaj rau Hastelloy B daim ntawv, thiab qhov xwm txheej ntawm qhov chaw cuam tshuam li cas rau kev tiv thaiv corrosion thiab kev huv hauv kev tu cev?
Qhov saum npoo tiav ntawm Hastelloy B daim ntawv cuam tshuam nws qhov kev ua tau zoo hauv kev ua tshuaj lom neeg, tshwj xeeb tshaj yog hais txog kev pib corrosion thiab kev huv. Ntau qhov kev xaiv tiav yog muaj rau ASTM B333.
Common Surface Finishes:
Kub Rolled, Annealed, thiab Descaled (Tsis yog . 1 Tiav):
Cov tsos mob: Matte, npub grey, kuj ntxhib.
Qhuav: Kub dov, ces annealed thiab pickled kom tshem tawm nplai.
Daim Ntawv Thov: Kev pabcuam tshuaj lom neeg dav dav uas qhov tsos tsis tseem ceeb. Lub rougher nto muaj qhov tseeb dua qhov chaw thiab tuaj yeem nyuaj dua los ntxuav.
Cold Rolled, Annealed, thiab Pickled (2D tiav):
Cov tsos: du, matte grey tiav.
Qhuav: txias dov, annealed nyob rau hauv ib tug oxidizing cua, ces pickled.
Daim ntaub ntawv: General fabrication qhov twg zoo dua nto uniformity yog xav tau.
Txias Rolled, Annealed, Pickled, thiab daim tawv nqaij dhau (2B tiav):
Cov tsos mob: Smooth, reflective, ci matte tiav. Qhov feem ntau tiav rau daim ntawv.
Ntau lawm: Tom qab annealing thiab pickling, daim ntawv yog muab lub teeb kawg txias dov dhau siv polished yob.
Daim Ntawv Thov: Nyiam rau cov khoom siv tshuaj thiab khoom noj khoom haus uas qhov kev huv huv yog qhov tseem ceeb. Lub smoother nto muaj tsawg crevices rau cov kab mob adhesion los yog chemical entrapment.
Bright Annealed (BA Finish):
Cov tsos mob: muaj kev cuam tshuam zoo heev, iav -zoo li tiav.
Kev tsim khoom: txias dov, ces muab tso rau hauv qhov chaw tswj (hydrogen lossis dissociated ammonia) rauv uas tiv thaiv oxidation, tshem tawm qhov xav tau ntawm pickling.
Cov ntawv thov: Ultra- daim ntawv thov huv, chav huv huv, thiab cov yam ntxwv ntawm vaj tse. Qhov du, tsis yog - ntxeem tau qhov chaw yooj yim tshaj plaws los ntxuav thiab tsawg kawg yuav pib corrosion.
Impact ntawm Performance:
Corrosion Resistance: Smoother finishes (2B, BA) muaj tsawg defects (micro-crevices, inclusions) qhov twg localized corrosion pib. Lawv kuj muaj tsawg dua qhov chaw ntawm qhov chaw raug rau cov xov xwm corrosive.
Cleanability: Rougher surfaces (Tsis yog. 1) cov txheej txheem cov khoom seem, ua rau kev ntxuav nyuaj thiab ua rau muaj kev pheej hmoo ntawm kev sib kis ntawm cov khoom sib kis. Rau cov ntawv thov kev lag luam ntsib cGMP (Tam sim no Kev Ua Haujlwm Zoo Tshaj Plaws), 2B lossis electropolished tiav feem ntau raug yuam.
Electropolishing: Cov ntawv tuaj yeem ua tau electropolished tom qab fabrication kom tshem tawm cov txheej txheej microscopic, nthuav tawm qhov tsis xws luag -dawb, siab dhau qhov zoo tagnrho rau ultra-siab- daim ntaub ntawv purity.
5. Yuav ua li cas Hastelloy B daim ntawv yuav tsum tau tuav, khaws cia, thiab tiv thaiv thaum lub sij hawm fabrication los tiv thaiv kom txhob muaj kab mob thiab nto puas?
Kev tuav thiab khaws cia ntawm Hastelloy B daim ntawv yog qhov tseem ceeb vim tias qhov chaw sib kis los yog kev puas tsuaj tuaj yeem cuam tshuam nws cov kev tiv thaiv corrosion thiab ua rau ua tsis tiav ntxov. Nickel alloys tshwj xeeb tshaj yog raug rau qee hom kev sib kis.
Kev tuav tswj thiab khaws cia tseem ceeb:
Segregation los ntawm Carbon Steel:
Kev pheej hmoo: Kev sib cuag nrog cov pa roj carbon steel (txawm tias muaj kev sib cuag los ntawm cov cuab yeej lossis cov racks cia) tuaj yeem hloov cov khoom hlau mus rau Hastelloy B nto. Cov khoom hlau no tuaj yeem ua raws li qhov chaw pib rau xeb thiab pitting corrosion thaum daim ntawv raug corrosive media. Cov kab mob hlau kuj tuaj yeem ua rau thaj tsam corrosion nyob rau hauv cov yeeb yaj kiab passive.
Txoj Cai: Khaws cov ntawv Hastelloy B rau ntawm cov hlau tsis muaj steel lossis ntoo racks, tsis txhob ncaj qha rau ntawm cov hlau. Siv cov yas los yog ntawv interleaving ntawm cov ntawv los tiv thaiv khawb thiab kis kab mob.
Txheej tiv thaiv:
Ntau tus neeg muag khoom siv cov yas yas lossis yas txheej rau ib lossis ob sab ntawm cov ntawv polished (2B, BA tiav) los tiv thaiv khawb thaum tuav thiab tsim khoom.
Ceeb Toom: Yog tias daim ntawv yuav raug siv rau qhov kub siab, xyuas kom cov txheej txheem raug tshem tawm tag nrho ua ntej raug tshav kub, vim qhov seem tuaj yeem carbonize thiab paug rau saum npoo.
Clean Lifting thiab Handling:
Siv cov nylon slings, lub tshuab nqus tsev lifters nrog huv si roj hmab pads, los yog hlau nplaum (txawm hais tias cov nickel alloys tsis muaj zog hlau nplaum, hlau nplaum yuav tsis muab kev ruaj ntseg lifting).
Tsis txhob rub cov ntawv hla ib leeg lossis hla qhov chaw ntxhib los tiv thaiv kev khawb tob uas ua raws li kev ntxhov siab thiab qhov chaw pib corrosion.
Marking thiab Identification:
Tsis txhob siv cov ntawv nyiaj carbon steel, hnov ntaus - cov cim cim, lossis cov crayons uas muaj leej faj lossis halogens rau kev kos. Cov no tuaj yeem cuam tshuam cov kab mob los yog ua rau pitting.
Siv cov - cov cim chloride tsawg, electro- tshuaj etching, los yog lub teeb abrasive marking nrog rau cov cuab yeej stainless hlau.
Kev tiv thaiv ib puag ncig:
Khaws hauv tsev hauv qhov chaw qhuav. Thaum Hastelloy B yog corrosion-resistant, condensation nyob rau saum npoo tuaj yeem ntes cov pa paug (chlorides, plua plav) thiab muaj feem ua rau staining lossis superficial corrosion.
Fabrication Cleanliness:
Sib tsoo log, hlau txhuam, thiab lwm yam cuab yeej siv ntawm Hastelloy B yuav tsum tau mob siab rau cov nickel alloys thiab yeej tsis tau siv yav dhau los ntawm cov hlau. Hla-kev kis kab mob los ntawm cov cuab yeej steel yog ib qho ua rau muaj kev ua haujlwm tsis zoo.
Tom qab kev tsim, daim ntawv yuav tsum tau muab ntxuav kom huv si (degreased) kom tshem tawm cov roj txiav, lubricants, thiab khw av. Yog tias daim ntawv yuav raug siv rau hauv kev pabcuam tseem ceeb, kev kho mob zaum kawg (acid tu) yuav raug teev tseg kom rov qab kho cov oxide zaj duab xis.
