Thaum cov neeg feem coob hnov 'poob ciab casting', lawv pom qhov kawg gleaming hlau ib feem - ib tug turbine hniav, ib tug kho mob cog, ib daim ntawm intricate hniav nyiaj hniav kub. Dab tsi tau glossed tshaj, yuav luag ib txwm, yog pwm. Lub plhaub ceramic uas tsis yog cov khoom lag luam, tab sis tsis muaj cov khoom lag luam tsuas yog tsis muaj nyob. Nws yog qhov chaw tsis zoo uas txhais txhua yam. Thiab muaj ib qho kev xav tsis zoo uas tus qauv siv quav ciab yog qhov nyuaj. Hauv kuv qhov kev paub, qhov ntawd yog qhov chaw ua haujlwm tiag tiag tseem tsis tau pib. Cov pwm yog qhov twg cov txheej txheem yeej lossis poob.
Lub Plhaub Game: Nws yog Txhua Yam Txog Txheej
Wb tham txog lub plhaub nws tus kheej. Nws tsis yog ib qho dip-thiab-dunk. Nws yog ib tug ritual. Koj pib nrog kev sib sau ua ke - tsob ntoo, pawg, txhua yam koj tab tom khiav. Thawj lub tsho tiv no, prime slurry, yog qhov tseem ceeb tshaj plaws. Qhov no yog qhov interface uas ntes txhua qhov nthuav dav ntawm koj tus qauv siv quav ciab. Yog tias koj muaj qhov chaw ua tiav ntawm Ra 3.2 lossis zoo dua, lub tsho tiv no txiav txim siab yog tias koj yuav ntaus nws. Kuv tau pom cov khw siv zircon-raws li slurry rau thawj txheej no, tshwj xeeb tshaj yog rau cov khoom muaj kev ncaj ncees zoo li cov hauv aerospace lossis kev kho mob. Cov hmoov nplej refractory ntawm no yog super zoo, yuav luag zoo li cov hmoov nplej uas koj yuav ci nrog. Puas muaj pob? Koj yuav pom lawv tom qab nodules ntawm lub casting. lav.
Cov txheej txheem stuccoing uas ua raws txhua qhov poob yog lwm qhov kev txiav txim hu. Cov qoob loo loj ntawm stucco-fused silica, alumina, zircon xuab zeb - nce nrog txhua txheej. Thawj stucco tej zaum yuav yog 200-mesh, yuav luag ib plua plav, los khaws cov ntsiab lus. Los ntawm lub tsho plaub los yog thib tsib, koj siv cov khoom siv coarser 30-50 mesh los tsim cov tuab thiab lub zog rau dewax thiab ncuav. Lub suab yog txhua yam: poob, ntws, stucco, qhuav. Rov ua dua. Kev ziab ib puag ncig yog tus khub ntsiag to. Cov av ntub dhau, thiab cov khaubncaws sab nraud povtseg yuav tsis kho kom zoo; lub plhaub nyob twj ywm 'ntsuab' thiab tsis muaj zog. Kub thiab qhuav heev, thiab koj yuav raug tawg los ntawm cov kuab tshuaj evaporation sai heev. Kuv twb muaj batch nyob rau hauv ib tug tsis zoo tswj chav qhuav tuaj tawm nrog ib tug tawv tawv tawv uas tsuas yog spelling teeb meem tom qab.
Thiab pes tsawg txheej? Qhov ntawd tsis yog los ntawm phau ntawv. Ib tug me me bronze sculptures yuav ploj mus nrog 5-6 txheej. Ib tug npib tsib xee-raws li superalloy turbine hniav pouring ntawm 1500 ° C +? Koj tab tom saib 9, tej zaum 12 txheej. Koj tsim kom txog thaum lub plhaub muaj qee qhov heft, ib lub suab dull thaum koj coj mus rhaub nws. Nws yog ib qho tactile. Lub hom phiaj yog lub plhaub uas muaj peev xwm ciaj sia lub thermal shock ntawm dewaxing (feem ntau yog chav autoclave hnub no) thiab tom qab ntawd tuav rov qab ib tug dej ntawm molten hlau yam tsis muaj buckling los yog tawg. Qhov ntawd yog tag nrho lub hom phiaj ntawm poob ciab casting pwm.
Dewaxing: Lub Sijhawm Ntawm Qhov Tseeb
Nov yog thawj qhov kev sim tiag tiag ntawm koj lub plhaub. Tag nrho cov txheej txheem txheej txheem no yog hais txog yuav ua rau flash-rhuab. Txoj kev siv hluav taws xob qub qub feem ntau ploj mus - ntxhov siab heev, ntxhov siab heev ntawm lub plhaub. Tam sim no nws yog high-pressure chav autoclaves. Lub hauv paus ntsiab lus yog yooj yim: ceev ceev lub plhaub, yaj cov quav ciab tawm ntawm sab hauv. Qhov kev txiav txim tsis yog. Qhov ntsuas kub thiab siab nce siab yog ib daim ntawv qhia. nrawm dhau, thiab cov wax nthuav dav tuaj yeem tshuab lub plhaub sib nrug ntawm sab hauv zoo li lub grenade. qeeb dhau, thiab cov quav ciab yuav yaj thiab ntws tsis sib xws, tawm hauv cov seem uas yuav hlawv tom qab thiab ua rau muaj qhov tsis xws luag.
Kuv nco qab ib txoj hauj lwm rau ib co stainless hlau valve lub cev. Cov qauv siv quav ciab yog tuab. Peb khiav tus txheej txheem autoclave voj voog. Qhov tshwm sim yog 30% plhaub tawg tus nqi. Cov quav ciab, dai rau hauv nruab nrab ntawm cov ntu tuab, nthuav dav sai dua li nws tuaj yeem khiav tawm ntawm lub rooj vag system. Peb yuav tsum rov qab mus thiab hloov cov qauv siv quav ciab-ntxiv cov vents sab hauv, hloov lub rooj vag tsim-tsuas yog los pab txhawb kev tshem tawm cov quav ciab. Nws yog ib qho kev ua phem heev: cov pwm tsim pib nrog cov quav ciab, tab sis nws yuav tsum tau lees paub thaum lub sij hawm dewax. Lub plhaub tsis passive; nws yog nyob rau hauv ib tug nruj kev sib tham nrog cov wax nws yog tsim los hloov.
Lub wax rov qab yog nws lub ntiaj teb. Koj tau txais cov quav ciab tawm, koj lim nws, koj muab nws nrog cov quav ciab tshiab los tswj cov khoom. Tab sis qhov ntawd yog lwm zaj dab neeg. Lub plhaub tam sim no yog khoob, tsis muaj zog, thiab tuav lub kab noj hniav zoo meej ntawm koj feem. Nws hu ua lub xeev ntsuab. Tom ntej no nres: lub cub tawg.
Burnout thiab Pour: Qhov twg Chemistry tshwm sim
Lub cub tawg ua ob txoj haujlwm: nws tshem tawm cov kab kawg ntawm cov quav ciab lossis cov dej noo, thiab nws ua rau cov khoom siv ceramic ua ke, tig lub plhaub ntsuab rau hauv cov pwm muaj zog, monolithic pwm. Tus nqi nce siab yog qhov tseem ceeb dua. Koj yuav tsum maj mam hlawv tawm cov organics tsis tsim cov roj uas tawg lub plhaub. Lub voj voog ib txwm tuaj yeem tuav ntawm 200 ° C rau ib teev, tom qab ntawd maj mam nce mus rau 900-1000 ° C. Koj tsis yog cua sov xwb; koj tab tom hloov cov chemistry ntawm cov binder hauv slurry.
Qhov no yog qhov kev paub txog ntaub ntawv tseem ceeb. Yog tias koj nchuav cov cobalt-chrome kho mob alloy, koj lub plhaub muaj pes tsawg leeg yuav tsum tiv thaiv cov hlau nkag ntawm qhov kub ntawm qhov tshwj xeeb. Lub plhaub tsim los rau cov pa roj carbon steel tsuas tuaj yeem hnov mob nrog cobalt, ua rau muaj kab mob. Cov tuam txhab uas muaj cov khoom siv sib sib zog nqus, xws li Qingdao Qiangsenyuan Technology Co., Ltd. (QSY), tsim cov kev paub no rau hauv lawv cov txheej txheem ntau xyoo lawm. Hauv lawv qhov chaw, tsi.comLawv hais txog kev ua haujlwm nrog cobalt thiab nickel-based alloys. Qhov ntawd qhia kuv tias lawv tau tsim cov qauv plhaub tshwj xeeb - tej zaum nrog zircon ntxiv lossis cov ntawv tshwj xeeb - txhawm rau ua kom muaj qhov kub thiab txias ntawm cov alloys. Nws tsis yog txheej txheem generic.
Thaum cov pwm kub (feem ntau koj ncuav thaum nws tseem nyob ntawm ob peb puas degrees Celsius kom tiv thaiv thermal shock thiab txhim kho hlau fluidity), koj ncuav. Cov hlau hits ceramic. Lub sijhawm no yog lub sijhawm poob ciab casting pwm ua pov thawj lawv tus nqi. Lawv yuav tsum tiv taus thermal stress, metallostatic siab, thiab tsis qhia tej impurities. Ib lub plhaub uas tsis raug rho tawm haujlwm yuav tawg. Ib qho uas raug rho tawm haujlwm dhau los tuaj yeem ua nkig. Nws yog lub qhov rais nqaim.
Knockout thiab Aftermath
Tom qab lub casting tau solidified thiab txias, koj tau mus ua txhaum lub pwm. Nws yog kev txaus siab, kev ua phem-dej dav hlau, kev co, qee zaum brute quab yuam. Lub plhaub taum zoo yuav tsum tawm hauv chunks, tsis yog hmoov av. Yog tias nws hloov mus rau hmoov, nws yuav raug rho tawm haujlwm. Yog hais tias nws yog fused rau cov hlau nyob rau hauv me ntsis, qhov no yog ib tug tshuaj tiv thaiv - tsis ncaj ncees lawm plhaub khoom rau lub alloy.
Sab hauv ntawm lub plhaub kab noj hniav, ib qho uas kov cov hlau, qhia ib zaj dab neeg. Nws yuav tsum yog tus du. Yog tias koj pom ib qho ntxhib, txiv kab ntxwv-tev kev ntxhib los mos ntawm cov kab noj hniav, uas txhais ncaj qha mus rau qhov chaw casting. Qhov roughness feem ntau los ntawm thawj lub tsho tiv no yog tuab heev lossis thawj stucco tsis embedded zoo. Nws yog cov ntaub ntawv pov thawj ntawm koj thawj zaug poob. Txhua qhov tsis zoo hauv pwm sab hauv los ua qhov zoo ntawm qhov casting. Tsis muaj qhov nkaum.
Qhov no yog qhov tseeb tus nqi ntawm pwm qhov tsis zoo yuav tshwm sim. Ib qhov chaw nto ntawm qhov casting tuaj yeem grindable. Ib qho mistun los ntawm lub plhaub tawg? Qhov ntawd yog qhov poob tag nrho, thiab koj tau poob tag nrho cov nqi ntxiv los ntawm cov qauv siv quav ciab mus ntxiv. Cov pwm yog cov khoom siv, tab sis nws yog cov khoom siv siab tshaj plaws hauv cov saw hlau.
Tshaj li Tus Qauv: Kev Sib Tham thiab Kev Txiav Txim Siab
Tsis yog tag nrho cov pwm tsim sib npaug. Xav txog ib feem nrog qhov sib sib zog nqus, nqaim channel-zoo li lub phaj ua kua txias rau cov khoom siv hluav taws xob. Tau txais cov slurry kom coat sib sib zog nqus hauv cov channel uas tsis muaj cua nkag yog npau suav phem. Tej zaum koj yuav tau siv lub tshuab nqus tsev pab txheej, los yog tig tsob ntoo thaum lub sij hawm dipping. Cov dej ntws tsis yooj yim; slurry tuaj yeem ua pas dej thiab tsim cov pob tuab uas ua rau lub plhaub tawg tom qab.
Los yog cores. Qee zaum koj xav tau cov kab noj hniav sab hauv uas tsis tuaj yeem tsim los ntawm cov quav ciab ib leeg. Koj ntxig ceramic cores rau hauv cov qauv siv quav ciab ua ntej shelling. Tam sim no koj lub plhaub yuav tsum tau cog lus nrog lossis tsawg kawg ua kom haum rau lub hauv paus no thaum tua thiab nchuav. Qhov sib txawv thermal expansion ntawm lub plhaub thiab cov khoom siv tseem ceeb yog qhov hloov pauv tshiab. Yog tias lawv tsis txav mus ua ke, cov tub ntxhais tuaj yeem hloov pauv lossis tawg, ua rau cov duab puab sab hauv. Qhov no yog thaj chaw siab heev, qhov twg cov pwm dhau los ua cov qauv sib xyaw.
Tom qab ntawd muaj qhov sheer scale. Kuv tau ua hauj lwm rau pwm rau qhov siab tshaj ib 'meter'. Lub plhaub rau ib yam dab tsi uas loj yuav tsum txhawb nqa nws tus kheej qhov hnyav thaum tuav. Lub logistics ntawm dipping, ziab, thiab txav cov loj loj, cov qauv tsis yooj yim yog ib qhov project engineering hauv nws tus kheej. Koj tsis tuaj yeem ua raws li phau ntawv qhia xwb. Koj tsim cov tswv yim - kev cai racks, tshwj xeeb kom qhuav ib ntus. Nws yog qhov chaw 30 xyoo ntawm kev ua haujlwm, zoo li QSY hais txog dab tsi, txhais ua hom kev nkag siab, daws teeb meem kev xav. Koj kawm paub tias lub plhaub zoo li cas rau ntawm ntau hom qauv. Nws yog ib qho khoom siv tes ua txheej saum toj ntawm kev tshawb fawb.
Yog li thaum koj saib qhov precision peev casting, tsis txhob pom cov hlau xwb. Pom dab ntawm lub plhaub ceramic uas ua rau nws. Txhua qhov contour, txhua qhov chaw tiav, txhua phab ntsa nyias yog qhov ua pov thawj rau qhov zoo thiab kev tswj hwm ntawm cov txheej txheej, raug rho tawm haujlwm ceramic. poob ciab casting pwm. Lawv yog cov uas tsis mloog lus, ua pov thawj rau tag nrho cov txheej txheem. Tau txais lawv txoj cai tsis yog ib kauj ruam hauv cov txheej txheem; nws yog tus txheej txheem. Tag nrho lwm yam yog kev npaj lossis ntxuav.
