Koj pom Alloy 20 ntawm daim ntawv spec, thiab thawj qhov kev xav yog feem ntau corrosion-resistant nickel alloy, lumping nws nrog Hastelloys thiab Inconels. Qhov ntawd yog qhov uas qhov oversimplification pib. Nyob rau hauv qhov tseeb, nws tus cwj pwm, tshwj xeeb tshaj yog nyob rau hauv fabrication thiab machining, zaum nyob rau hauv no nuanced, tej zaum kev ntxhov siab, nruab nrab hauv av. Nws tsis yog kev zam txim zoo li 316L, tab sis nws tsis hais kom muaj kev hwm zoo ib yam li C-276. Kuv twb pom tej yaam num stumble los ntawm kev kho nws zoo li ib tug.
Tus Fabricator's Reality: Welding and Forming Nuances
Qhov twg koj yeej kawm txog ib qho alloy yog nyob rau hauv lub khw, tsis yog los ntawm cov ntaub ntawv. Nrog Alloy 20, cov txheej txheem vuam yog qhov tseem ceeb. Nws yog stabilized nrog niobium, tab sis qhov ntawd tsis ua rau nws tsis muaj zog rau rhiab heev yog tias koj tsis saib xyuas nrog cov khoom cua sov. Kuv nco qab ib pawg ntawm fabricated headers rau phosphoric acid kev pab cuam qhov twg cov welds zoo tag nrho tab sis ua tsis tau tejyam ntxov ntxov nyob rau hauv lub tshav kub-cuam tshuam cheeb tsam. Qhov teeb meem? Interpass kub siab dhau lawm. Cov spec tau hais tias khaws cia qis dua 150 ° C, thiab cov neeg ua haujlwm tau lax, xav tias nickel alloy tuaj yeem nqa nws. Nws ua tsis tau. Qhov kev paub no tau ua raws li txoj cai: kho nws lub voj voog thermal nrog tib txoj kev qhuab qhia raws li koj xav tau rau cov khoom sib txawv ntau dua.
Kev tsim yog lwm qhov chaw. Nws muaj qhov ductility zoo, tab sis nws qhov kev ua haujlwm hnyav yog qhov tseem ceeb. Yog tias koj tab tom ua txias txias, lub cuab yeej siab xav tau kev hloov pauv piv rau cov qib austenitic. Peb yuav tsum tau txiav cov yob rau lub plhaub thiab lub raj cua kub exchanger lub baffles ib zaug vim hais tias thawj zaug dhau los induced ntau hardening, ua rau microcracks thaum lub sij hawm tom ntej trimming. Nws yog ib yam khoom uas xav kom koj npaj rau lub caij nplooj ntoos hlav thiab lub zog ntxiv tom qab txhua kauj ruam deformation.
Qhov no yog qhov uas tus foundry qhov kev paub tseem ceeb. Ib tug khub zoo li Qingdao Qiangsenyuan Technology Co., Ltd. (QSY), nrog lawv peb lub xyoo caum hauv casting thiab machining, feem ntau muaj cov kev txwv no hu rau hauv. Lawv tau hais ua ntej rau lawv. peev casting cov txheej txheem nrog alloys zoo li no, tswj cov solidification tus nqi thiab tom qab-casting tshav kub kev kho mob yog tsis-negotiable kom ua tau raws li cov carbide faib thiab tsis txhob localized corrosion kick-off ntsiab lus.
Machining: Qhov sib npaug ntawm tawv thiab Gummy
Yog tias koj tsuas yog tshuab 304 lossis txawm tias duplex steels, Alloy 20 yuav xav txawv. Nws tsis yog qhov nyuaj tshaj plaws nyob rau ntawd, tab sis nws yog tenacious. Nws tsis tawg ib nti huv si; nws nyhav tsim ntev, stringy swarf uas tuaj yeem ua rau muaj kev puas tsuaj yog tias tsis tswj hwm. Tus yuam sij yog ntse, zoo-rake tooling thiab zoo ib yam, nruab nrab feeds thiab speeds. Cov kev txiav txhoj puab heev ua rau kev txhim kho ntawm ntug thiab qhov chaw tsis zoo.
Peb kawm qhov no ntawm txoj haujlwm twj tso kua mis. Siv tib yam tsis xws li rau 17-4PH stainless ua rau cov cuab yeej hnav sai thiab tau qhab nia ntawm cov ntawv xov xwm. Rov qab tawm ntawm qhov nrawm, nce qhov pub me ntsis (tsis pom zoo, tab sis nws pab hauv nti tawg), thiab siv lub tshuab ua kom lub siab ua kom muaj qhov sib txawv. Cov ntaub ntawv muaj ib txoj kev qhia rau koj thaum koj ua yuam kev.
Rau cov khoom sib xyaw, qhov no yog qhov sib xyaw CNC machining muaj peev xwm dhau los ua qhov txiaj ntsig loj. Ib tus neeg muag khoom uas ua haujlwm rau ob qho tib si casting thiab qhov kawg machining, zoo li cov kev pabcuam tau teev tseg rau tsi.com, tuaj yeem txhim kho tag nrho cov haujlwm ua haujlwm. Lawv tuaj yeem tso cov khoom lag luam tsim nyog los ntawm cov txheej txheem casting, paub meej tias lawv cov tshuab yuav ua li cas thiaj li txiav txim siab zaum kawg ntawm cov hlau tshwj xeeb no, zam qhov kev ntxhov siab ntawm kev xa cov semi-tiav, hardened casting mus rau lwm lub khw.
Cov ntsiab lus tshwj xeeb Alloy Cov ntsiab lus thiab cov khoom xaiv
Alloy 20 feem ntau categorized nyob rau hauv tshwj xeeb alloys, thiab yog li ntawd. Tab sis nws yog ib qho tseem ceeb kom paub tias nws yog dab tsi tshwj xeeb rau. Nws qhov chaw qab zib yog qhov chaw ib puag ncig sulfuric acid, tshwj xeeb tshaj yog nyob rau hauv cov tshuaj chlorides. Nws yog qhov mus-mus rau ntau qhov sib xyaw tso tsheb hlau luam, piping, thiab fittings hauv kev ua tshuaj. Txawm li cas los xij, kuv tau pom nws tsis raug siv hauv kev cia siab ntawm kev tawm tsam thoob ntiaj teb. Nws tsis zoo tagnrho rau cov mob oxidizing siab lossis hydrofluoric acid, piv txwv li.
Kev xaiv nws feem ntau los mus rau qhov kev ntsuam xyuas tus nqi tiv thaiv ntau dua-nickel alloys. Hauv ib qhov project rau cov nroj tsuag tshuaj nruab nrab, qhov pib tsim hu ua Hastelloy C-22 rau tag nrho cov reactor system. Kev tshuaj xyuas qhia tau hais tias rau qhov kub thiab txias ntawm sulfuric acid tam sim no, Alloy 20 tau ntau tshaj qhov txaus. Kev hloov pauv tau txuag cov nqi peev tseem ceeb yam tsis muaj kev cuam tshuam rau lub neej kev pabcuam. Qhov ntawd yog tus nqi ntawm qhov tseeb, tsis dhau-conservative, xaiv cov khoom siv.
Qhov no ua raws li cov khoom siv ntawm tus kws tshaj lij xws li QSY. Lawv ua haujlwm nrog Nickel-raws li alloys thiab cobalt-based alloys txhais tau hais tias lawv nkag siab txog cov txheej txheem xaiv qib no. Lawv tsis yog muag hlau xwb; lawv feem ntau koom nrog kev sib tham thaum ntxov los txiav txim siab tias Alloy 20 yog qhov haum, lossis yog tias cov kev pabcuam xav tau ib kauj ruam mus rau qee yam muaj zog dua, uas lawv tuaj yeem muab tau.
Casting Considerations: Soundness thiab Detail
Casting Alloy 20, tshwj xeeb ntawm cov plhaub molding los yog peev casting txoj kev QSY tshwj xeeb hauv, nthuav tawm nws tus kheej cov teeb meem nyuaj. Lub alloy muaj ib tug kuj siab melting point thiab tshwj xeeb shrinkage yam ntxwv. To get a sound, dense casting free from shrinkage porosity or hot tears, the gating and risering system design is paramount. Nws tsis yog lub ncuav thiab tsis nco qab cov khoom.
Kuv tau tshuaj xyuas cov cam khwb cia lub cev qhov twg corrosion pib los ntawm sab hauv micro-shrinkage kab noj hniav uas tsis pom ntawm RT. Lub foundry tau siv cov qauv tsim kom zoo dua rau cov pa roj carbon steel. Kev txhim kho kev hloov pauv mus rau exothermic risers kom cov hlau molten ntev dua thiab txhawb kev taw qhia kev sib zog. Ib tug foundry tus qauv engineering kev txawj ntse yog ncaj qha mus kuaj ntawm no.
Qhov zoo ntawm kev ua haujlwm ntev yog lub tsev qiv ntawv ntawm cov qauv pov thawj thiab cov txheej txheem uas lawv tsim. Rau cov khoom siv rov ua dua tshiab xws li cov twj tso kua mis lossis cov impellers hauv Alloy 20, cov ntaub ntawv txheej txheem keeb kwm no yog qhov muaj txiaj ntsig zoo rau kev ua kom zoo sib xws thiab zoo los ntawm thawj lub ncuav mus rau pua pua.
Hauv Kev Pabcuam: Lub Sijhawm Saib Xyuas Ntev
Cov pov thawj zaum kawg ntawm kev xaiv cov khoom siv yog nyob rau hauv kev pabcuam. Alloy 20 Cheebtsam xav tau lub hauv paus kev soj ntsuam lub sijhawm, tshwj xeeb tshaj yog nyob rau hauv welds thiab high-stress. Peb ib zaug taug qab ib txheej ntawm cov cua kub exchanger raj tshaj tsib xyoos. Cov ntaub ntawv niam txiv yog impeccable, tab sis ob peb lub raj-rau-tubesheet welds pom cov cim ntawm me ntsis riam-kab nres. Nws tsis yog qhov ua tsis tiav, tab sis nws tau hais tias txawm tias qhov sib koom ua ke zoo yog qhov yooj yim tshaj plaws. Qhov kev daws teeb meem tsis yog hloov cov hlau, tab sis siv cov txheej txheem tshuaj xyuas ntau dua rau cov pob qij txha thaum kaw.
Nws kuj muaj cov cuab yeej zoo ntawm qhov kub nruab nrab, tab sis koj tsis xav thawb nws lub zog creep. Rau high-temperature, high-pressure sulfuric kab, nws yuav yog qhov tsis ncaj ncees lawm kev xaiv. Ib zaug ntxiv, nws yog hais txog kev paub nws txoj kab.
Thaum kawg, ua haujlwm nrog Alloy 20 yog hais txog kev hwm nws tus kheej tshwj xeeb. Nws yog ib qho khoom siv zoo heev uas ua rau muaj qhov sib txawv tseem ceeb ntawm cov qauv stainless hlau thiab hwm nickel alloys. Tab sis nws tus nqi tsuas yog ua tiav thaum koj lees paub nws cov nuances hauv fabrication, machining, thiab daim ntawv thov. Nws tsis yog khoom; nws yog cov cuab yeej precision. Thiab zoo li txhua yam cuab yeej precision, nws qhov kev ua tau zoo nyob ntawm ntau yam ntawm cov txuj ci ntawm cov neeg qhia, casting, machining, thiab txhim kho nws raws li nws ua nyob rau hauv chemistry ntawm alloy nws tus kheej.
