Thaum koj hnov 'kev nqis peev casting khoom siv,' feem ntau lub siab dhia ncaj nraim mus rau wax lossis ceramic slurry. Qhov ntawd yog qhov chaw. Cov dab neeg tiag tiag yog nyob rau hauv gritty, feem ntau overlooked cov ntsiab lus - cov binders uas tsis heev teem nyob rau hauv high humidity, peev casting khoom siv zoo li refractories uas hloov pauv batch-rau-batch, lossis cov neeg tso tawm uas ua haujlwm zoo kawg nkaus kom txog thaum lawv tsis ua. Nws tsis yog ib daim ntawv teev khoom xwb; Nws yog ib txoj hlua ntawm kev vam khom qhov twg ib qho kev sib txuas tsis muaj zog, hais tias lub tsho tiv no tsis sib haum, tuaj yeem khawb tag nrho kev khiav. Kuv tau pom cov khw muag khoom liam lawv lub qhov cub rau qhov teeb meem porosity uas tau tshwm sim los ntawm cov qib pheej yig dua alumina silicate muab tub lim lawv hloov mus rau rau lub hlis ua ntej. Cov khoom siv yog lub hauv paus, thiab koj tsuas pom lawv thaum lawv ua tsis tiav.
Cov Khoom Siv Tseem Ceeb: Tshaj li Daim Ntawv Tshawb Fawb
Cia peb rhuav tshem cov khoom tseem ceeb, tsis yog los ntawm phau ntawv teev npe, tab sis los ntawm lub rooj ntev zaum. Yog, koj xav tau cov qauv siv quav ciab, tab sis hom tseem ceeb heev. Ib qho yooj yim-melt wax tej zaum yuav yooj yim dua rau phau ntawv tooling, tab sis rau complex, nyias-walled geometries yuav tsum tau siab dimensional stability thaum lub sij hawm sib dhos, koj tab tom saib ib tug puv, siab-melt point blend. Qhov sib txawv ntawm qhov kawg ntawm qhov kawg thiab qhov ntev ntev tuaj yeem yog ib nrab lab lossis ntau dua, uas yog txhua yam hauv aerospace lossis cov khoom siv kho mob. Tom qab ntawd muaj lub rooj vag system ciab. Siv tib lub wax rau cov qauv thiab cov rooj vag yog ib qho kev txuag nqi uas feem ntau rov qab thaum lub sij hawm dewaxing, ua rau tawg.
Sab hauv ceramic yog ib txoj haujlwm chemistry. Lub slurry tsis yog slurry xwb. Nws yog ib tug meej cocktail ntawm colloidal silica los yog ethyl silicate binder, refractory hmoov (xws li fused silica, zircon, los yog alumina), thiab wetting / anti-foam agents. Lub pH thiab viscosity xav tau kev saib xyuas tas li - kev hloov ntawm ob peb vib nas this ntawm Zahn khob tuaj yeem cuam tshuam rau lub tsho tuab thiab cov kua dej, ua rau lub plhaub tsis muaj zog. Kuv nco qab txog ib txoj hauj lwm rau qee qhov marine impellers uas peb tau txais lub plhaub tawg thaum lub sij hawm autoclave dewaxing. Tig tawm, cov khoom tshiab ntawm colloidal silica muaj qhov sib txawv me ntsis qhov loj me me, cuam tshuam rau lub zog gel ntawm thawj lub tsho loj. Peb yuav tsum tau kho lub sij hawm poob thiab stucco xuab zeb grain loj los them. Cov no yog cov kev hloov kho uas koj yuav tsis pom hauv phau ntawv.
Stucco sands yog lwm qhov sib txawv uas ntsiag to. Lub angularity thiab loj tis ntawm zircon xuab zeb piv rau fused silica xuab zeb tsim muaj ntau yam sib txawv plhaub permeability thiab lub zog. Siv cov coarser stucco ntawm lub tsho tiv no txhim kho cov kua dej thiab txo lub sij hawm tsim lub plhaub, tab sis yog tias qhov gradation tsis raug, nws tsim teeb meem kev sib txuas. Nws yog qhov sib npaug ntawm lub plhaub lub zog thiab cov pa permeability thaum lub sij hawm nchuav. Ib tus neeg muag khoom nrog kev tswj nruj ntawm cov khoom siv specs yog tsim nyog rau lawv qhov hnyav hauv kub.
Kev Txhawb Nqa: Feem ntau tsis nco qab, Ib txwm tseem ceeb
Qhov no yog qhov uas ntau lub khw sim tswj cov nqi tau hlawv. Xav txog cov khoom siv uas yeej tsis ua rau kev txhaj tshuaj glamour. Plhaub sealants rau patching me imperfections - yog tias lawv tsis muaj qhov sib txuam thermal expansion coefficient rau lub plhaub, lawv yuav tawm hauv lub preheat. Tom qab ntawd muaj pwm txhawb los yog tua cov tais. Siv cov txheej txheem ceramic fiber board yuav zoo li zoo, tab sis yog tias nws tsis zoo tag nrho los yog tsis muaj lub zog kub, hnyav, lub plhaub nyuaj tuaj yeem ua rau lub sijhawm kub kub preheat, ua rau muaj kev ntxhov siab thiab muaj peev xwm tawg ua ntej hlau txawm pom nws.
Kev nqis peev casting khoom siv txuas ntxiv mus rau kev ua haujlwm tom qab cam khwb cia ib yam nkaus. Cov tshuaj rau lub plhaub tshem tawm: tsis yog ib qho dej qab zib caustic xwb yuav ua. Lub concentration, kub, thiab lub sij hawm raug yuav tsum tau tuned rau koj lub plhaub tshwj xeeb kom tshem tawm cov ceramics zoo yam tsis muaj kev tawm tsam cov hlau substrate, tshwj xeeb tshaj yog nrog cov reactive alloys xws li titanium los yog tej yam npib tsib xee. Ib yam li ntawd, cov khoom siv txiav thiab sib tsoo-abrasive cut-off log, tshwj xeeb grit siv rau cov hlau sib txawv. Siv cov khoom siv hluav taws xob txhuas oxide rau ntawm cobalt superalloy yog ib qho kev tawm dag zog hauv kev tsis muaj txiaj ntsig thiab cov khoom siv khib nyiab.
Ib qho ntawm cov khoom tsis sib tham feem ntau yog qhov ntsuas kub qis qis los yog pyrometric cones rau qhov cub preheat. Kev cia siab ib leeg ntawm lub qhov cub lub thermocouple yog qhov txaus ntshai. Kuv tau pom ib lub thermocouple drift los ntawm 25 ° C, ua rau cov plhaub qis qis uas tsis muaj zog thiab permeable ntau dua li qhov xav tau. Qhov tshwm sim yog hlau nkag thiab ib pawg ntawm cov valve lub cev. Ib qho yooj yim, qub-tsev kawm ntawv lub khob hliav qab tso rau hauv lub qhov cub ua rau peb pom qhov pom tseeb tias cov ntawv nyeem tsis tuaj yeem ua tsis tau. Qee zaum, cov khoom siv qis qis yog qhov tseem ceeb tshaj plaws.
Material Match: Lub Alloy-Supply Symbiosis
Koj xaiv ntawm peev casting khoom siv yog dictated los ntawm cov hlau koj nyob nraum pouring. Qhov no tsis yog-negotiable. Pour 316 stainless? Zircon thawj lub tsho tiv no thiab cov tsho tiv no nrog fused silica tej zaum yuav yog tus qauv. Tab sis hloov mus rau high-manganese hlau lossis nickel-based superalloy zoo li Inconel 718, thiab qhov kev ua si hloov. Qhov siab dua qhov kub thiab txias ntawm cov hlau-kua sib cuam tshuam xav tau refractories nrog cov ntsiab lus fusion siab dua thiab zoo dua thermal poob siab. Tej zaum koj yuav tau hloov mus rau tag nrho-zircon system lossis txawm tias tshwj xeeb refractories zoo li yttria rau qee yam reactive alloys.
Cov wax yuav tsum tau sib xws. Qee qhov kev ua tau zoo alloys muaj qhov xav tau superheat siab heev. Yog tias cov qauv siv quav ciab tsis raug tshem tawm tag nrho thaum lub sij hawm hlawv, cov pa roj carbon tuaj yeem tshwm sim hauv cov hlau, ua rau muaj kev cuam tshuam loj heev thiab kev tiv thaiv corrosion. Qhov no yuav tsum muaj cov quav ciab nrog cov hmoov tshauv tsawg thiab lub plhaub hlawv lub voj voog uas tau tsim kho kom zoo nyob ib puag ncig cov khoom siv tshwj xeeb. Nws yog ib qho kev sib tham ntawm cov qauv khoom, lub plhaub system, thiab cov alloy.
Qhov no yog qhov uas cov kev txawj ntse ntawm ib tug foundry ua qhov tseem ceeb. Ib lub tuam txhab zoo li Qingdao Qiangsenyuan Technology Co., Ltd. (QSY), nrog lawv peb xyoo caum hauv peev casting thiab machining, embodies lub ntsiab cai no. Ua haujlwm hla cov hlau cam khwb cia hlau, hlau, stainless, thiab tshwj xeeb cobalt / nickel alloys, lawv nkag siab tias cov khoom siv-cov ntaub ntawv plhaub, cov qauv waxes-tsis yog ib qho loj-haum-tag nrho. Lawv lub sijhawm ua haujlwm ntev qhia txog kev paub tob, kev paub txog kev nrhiav thiab tsim nyog cov khoom siv rau txhua tsev neeg cov khoom, uas yog ib feem tseem ceeb ntawm kev ua tiav qhov sib xws hauv cov txheej txheem sib txawv-rhiab heev. Koj tuaj yeem pom lawv txoj hauv kev rau kev tsim khoom sib xyaw ntawm lawv qhov chaw ntawm https://www.tsingtaocnc.com.
Kev Tshawb Fawb thiab Kev Tsim Nyog: Lub Ntiaj Teb Tiag Tiag
Nrhiav tus neeg muag khoom rau colloidal silica yog ib qho yooj yim. Nrhiav ib qho uas muab batch-rau-batch sib xws nrog cov ncauj lus kom ntxaws ntau cov ntaub ntawv txheeb xyuas yog qhov nyuaj thiab kim dua. Cov txheej txheem tsim nyog yog lim hiam tab sis tsim nyog. Peb tau siv los khiav ib qho mini-cam khwb cia nrog txhua pawg tshiab ntawm cov khoom siv lub tsho loj-ib qho qauv sim yooj yim, ob peb lub plhaub, nchuav nrog cov hlau uas paub. Peb yuav faib nws, nrhiav kev nkag mus rau hlau, ntsuas qhov chaw tiav, kos rau kev suav nrog. Nws raug nqi sijhawm thiab nyiaj txiag, tab sis nws tiv thaiv kev puas tsuaj ntau lawm.
Tsim kev sib raug zoo nrog ob peb tus neeg muag khoom tseem ceeb yog qhov zoo dua li niaj hnub caum tus nqi qis tshaj. Ib tus neeg muag khoom zoo yuav ua haujlwm nrog koj thaum muaj teeb meem. Kuv nco txog ib lub sij hawm thaum peb lub plhaub tawg tus nqi inexplicably nce. Peb cov khoom lag luam slurry xa lawv cov kws tshuaj. Peb tau siv sijhawm ib hnub los tshuaj xyuas peb cov txheej txheem, thiab nws tau taw qhia tias qhov kev hloov pauv hauv peb cov dej hauv zos cov dej ntxhia (tom qab hloov chaw hauv nroog) tau cuam tshuam rau cov slurry lub zog ionic. Nws pab hloov kho ib qho me me ntxiv kom them rov qab. Qhov ntawd yog tus nqi koj tsis tau txais los ntawm tus neeg muag khoom online faceless.
Nws kuj them nyiaj rau qee lub sijhawm tshawb xyuas cov neeg xa khoom thib ob. Rau cov khoom xws li cov ntxaij lim dej ceramic (ua npuas dej los yog reticulated), qhov pore loj thiab cov qauv kev ncaj ncees yog qhov tseem ceeb rau molten hlau pom. Ib pawg tsis zoo tuaj yeem tawg lossis tawg, qhia txog cov khoom siv ceramic rau hauv qhov casting. Muaj ib tus neeg xa khoom thaub qab uas ua tau raws li spec yog ib feem ntawm kev tswj xyuas cov saw hlau ruaj khov rau qhov tseem ceeb peev casting khoom siv.
Ua tsis tiav raws li Kev Kawm: Thaum Cov Khoom Siv Tom Qab
Txhua leej txhua tus muaj dab neeg tsov rog. Ib qho ntawm kuv cov lus qhia kim tshaj plaws suav nrog tus nqi-optimized gating ciab. Nws muaj me ntsis thermal expansion dua peb cov qauv siv quav ciab. Hauv California lub caij ntuj sov sov, chav sib dhos yuav nce siab tshaj 75 ° F. Qhov sib txawv ntawm qhov sib txawv ntawm lub rooj vag thiab cov qauv intricate ua rau muaj kev ntxhov siab tawg ntawm cov junctions uas tsis pom qhov muag. Tsuas yog tom qab lub plhaub tsev thiab dewaxing puas tau cov kab nrib pleb tshwm nyob rau hauv lub ceramic, ua rau fins thiab veining ntawm lub castings. Peb poob ib lub hlis ntau lawm. Qhov kho tsis yog hloov cov quav ciab xwb; nws kuj tau ua raws li kev tswj hwm ib puag ncig nruj hauv thaj chaw qauv sib dhos.
Lwm qhov hloov maj mam yog nrog tus tshiab, txhim kho cov neeg sawv cev ntub dej hauv slurry. Nws tsim cov tsho zoo nkauj, tsis muaj npuas. Txawm li cas los xij, tom qab ntawd peb pom tias nws tau tso ib zaj duab xis seem uas ua rau me ntsis cuam tshuam kev sib cuam tshuam ntawm lub tsho thib peb thiab plaub. Cov plhaub taum dhau cov qauv kev ntsuas lub zog tab sis yuav delaminate nyob rau hauv lub thermal shock ntawm pouring loj castings. Qhov kev ua tsis tiav tau sib cuam tshuam thiab siv ntau lub hlis rau hauv paus-ua rau. Tam sim no, txhua qhov kev hloov pauv hauv surfactant lossis additive, txawm tias me me, mus los ntawm tag nrho cov thermal shock test raws tu qauv ntawm lub plhaub tsim-tus neeg sawv cev.
Cov kev ua tsis tiav no qhia tias cov khoom siv yog qhov system. Koj tsis tuaj yeem hloov ib qho kev hloov pauv hauv kev sib cais. Nws yuav tsum muaj kev pom zoo ntawm tag nrho cov txheej txheem saw, los ntawm kev ua qauv mus rau shakeout. Qhov kev paub los taw qhia qhov no los ntawm ntau xyoo ntawm kev ua haujlwm ntawm tes, kev daws teeb meem, thiab tsim kom muaj kev nkag siab zoo rau cov ntaub ntawv no cuam tshuam li cas. Nws yog qhov sib txawv ntawm tsuas yog yuav cov khoom siv thiab kev nkag siab tiag tiag peev casting khoom siv raws li lub dynamic, sib tham sib lub hauv paus ntawm cov khoom siv tes ua.
