Thaum cov neeg feem coob hnov 'cov ntaub ntawv pov tseg ploj', lawv tam sim ntawd xav txog cov quav ciab nws tus kheej. Qhov ntawd yog thawj qhov kev xav tsis zoo. Cov qauv siv quav ciab tsuas yog qhov pib, qhov chaw ib ntus. Cov ntaub ntawv tiag tiag pib tom qab siv quav ciab ploj mus. Nws yog hais txog lub refractory slurry, stucco, hlau koj ncuav, thiab txawm tias huab cua nyob rau hauv koj burnout cub. Tau txais ib qho ntawm qhov tsis ncaj ncees lawm txhais tau hais tias qhov sib txawv ntawm lub suab nrov nrov thiab cov khoom seem uas kim heev. Kuv tau pom ntau txoj haujlwm ua tsis tiav vim tias ib tus neeg tau xaj 'tus qauv' peev hmoov yam tsis xav txog qhov kev nthuav dav ntawm cov hlau los yog ib feem ntawm geometry.
Lub Foundation: Txhua yam pib nrog lub plhaub zoo
Wb tham txog cov pwm. Lub plhaub peev tsis yog 'plaster' xwb. Rau feem ntau engineering daim ntaub ntawv, tshwj xeeb tshaj yog nrog high-melt alloys, koj nyob nraum soj ntsuam nrog ib tug silica-raws li system, feem ntau fused silica los yog zircon hmoov. Cov ntaub ntawv tseem ceeb - ethyl silicate los yog colloidal silica. Cov colloidal silica binders muaj ntau dua tam sim no rau lawv qhov sib xws, tab sis cov txheej txheem ethyl silicate tuaj yeem muab rau koj kom pom tseeb dua ntawm qee qhov geometries, txawm hais tias lawv nyuaj dua los daws. Qhov kev xaiv ntawm no dictates koj tag nrho cov sij hawm kom qhuav. nrawm dhau, thiab koj tau tawg; qeeb dhau, thiab koj cov kab ntau lawm grinds kom nres.
Kuv nco qab ib pawg ntawm nickel-based superalloy turbine hniav peb tau ua. Cov ntawv luam tau hu rau cov phab ntsa nyias. Peb siv peb tus qauv zircon thawj slurry, tab sis lub stucco yog qib tsis ncaj ncees lawm - cov xuab zeb yog ntxhib heev. Nws tsis tau xauv rau hauv slurry kom zoo ntawm cov npoo zoo. Qhov tshwm sim? Hlau nkag, ib tug ntxhib li-cam khwb cia nto uas coj lub hnub nyoog mus rau lub tshuab ntxuav. Zaj lus qhia yog tias tus poob ciab cov ntaub ntawv pov thawj rau lub plhaub yuav tsum tau sib phim tsis yog rau cov hlau, tab sis rau qhov loj me. Rau kev nthuav dav zoo, koj mus zoo dua nrog koj cov stucco txoj cai los ntawm thawj lub tsho tiv no, txawm tias nws txhais tau tias ntxiv lub tsho tiv no los yog ob lub zog.
Qhov no yog qhov kev paub dhau los ntawm lub khw muag khoom ntev ntev tseem ceeb. Ib lub tuam txhab zoo li Qingdao Qiangsenyuan Technology Co., Ltd. (QSY), nrog lawv 30 xyoo nyob rau hauv peev casting thiab machining, yuav muaj lawv cov qauv slurry thiab stucco gradations dialed rau ntau tsev neeg cov khoom. Lawv tsis yog tsuas yog yuav 'kev nqis peev' xwb; Lawv tab tom tswj hwm lub tsev qiv ntawv ntawm cov khoom sib txuas rau cov hlau cam piv rau cobalt-based alloys, piv txwv li. Qhov kev paub hauv tsev kawm ntawv hauv cov ntaub ntawv npaj yog qhov koj them nyiaj tiag tiag.
Lub Wax Nws tus kheej: Tsis yog txhua tus tsim muaj vaj huam sib luag
Rov qab mus rau qhov quav. Nws zoo nkaus li yooj yim, tab sis nws yog qhov tseeb polymer sib xyaw. Koj muaj koj tus qauv siv quav ciab, koj cov khoom siv khiav, thiab koj cov khoom siv kho mob. Lawv muaj cov ntsiab lus melting sib txawv, viscosities, thiab shrinkage tus nqi. Siv cov khoom siv uas tsis tshua muaj melt-point kho wax ntawm cov qauv siab-melt-point tuaj yeem ua rau muaj kev cuam tshuam thaum sib dhos los yog thaum ntxov ntawm dewaxing. Qhov mob taub hau loj tshaj plaws yog wax expansion. Yog tias koj cov mis nyuj wax nthuav ntau dhau ntawm qhov kub thiab txias, nws tuaj yeem tawg lub plhaub ntsuab me me thaum lub sij hawm autoclave dewaxing txheej txheem. Poof, muaj mus koj pwm.
Peb ib zaug hloov mus rau ' pheej yig dua' cov khoom siv quav ciab rau kev khiav loj ntawm stainless hlau fittings. Cov kev txhaj tshuaj wax tsis tau tawm me ntsis, thiab cov quav ciab muaj ntau dua volumetric contraction. Nws zoo nkaus li zoo kom txog thaum peb pib sib sau cov pawg - cov qauv tau hloov pauv me ntsis, ua rau cov kab tsis sib haum ntawm qhov kawg castings. Cov nyiaj khaws cia ntawm wax raug tshem tawm kaum zaug dhau los ntawm NDT ntxiv thiab kev siv tshuab xav tau. Tam sim no, peb lo nrog cov pov thawj sib xyaw thiab khiav cov khoom siv sim me me rau txhua qhov haujlwm tshiab. Lub wax yog lub literal blueprint; yog nws tsis yog, txhua yam downstream yog tsis ncaj ncees lawm.
Hlau Fill: Qhov twg Material Science tau txais tiag
Qhov no yog qhov pom tseeb, tab sis nws yog tag nrho ntawm subtleties. Cov ntaub ntawv rau 316L stainless yog ib yam; Yuav ua li cas cov cua kub ntawm cov hlau cuam tshuam nrog koj lub plhaub tshwj xeeb ntawm koj qhov tshwj xeeb pouring kub yog lwm qhov. Fluidity, kub tearing nyiam, shrinkage cwj pwm - nws yog txhua yam nyob rau hauv cov ntsiab lus. Nrog tshwj xeeb alloys xws li npib tsib xee los yog cobalt-raws li QSY cov npe, kev tswj yog nruj dua. Cov alloys no feem ntau reactive. Yog tias koj lub plhaub muaj qhov tsis ncaj ncees lawm chemistry lossis tsis yog tag nrho sintered, koj tuaj yeem tau txais cov txheej txheem tsis zoo uas yog npau suav phem tshem tawm.
Gating thiab pub kev tsim yog ib feem ntawm poob ciab cov ntaub ntawv pov thawj kev sib tham, thiab. Cov khoom siv riser (feem ntau yog tib lub alloy) yog kev suav kev txi. Nws qhov loj me thiab qhov tso kawm yog ib qho kev ua haujlwm ntawm cov alloy lub solidification ntau yam. Ib tug ntev-ntau alloy xav tau ib tug sib txawv noj lub tswv yim tshaj li ib tug luv luv-nqi. Kuv tau pom cov plhaub zoo nkauj nchuav zoo kawg nkaus, tsuas yog nrhiav kom pom cov porosity shrinkage nyob rau hauv ib seem tuab vim tias cov riser tsis raug lossis me me dhau. Cov hlau yog 'rau spec', tab sis tus tsim tsis hwm nws cov khoom siv.
Unseen Player: Lub voj voog Burnout
Feem ntau overlooked nyob rau hauv daim ntawv teev cov ntaub ntawv yog lub cub tawg cua. Lub voj voog kub hnyiab ua ob txoj haujlwm tseem ceeb: nws tshem tawm cov quav ciab (tsis tawg lub plhaub) thiab nws sinters lub plhaub rau hauv cov pwm muaj zog, ruaj khov. Qhov ntsuas kub ntawm qhov ntsuas kub, tuav, thiab ib puag ncig (cua, nitrogen) yog tag nrho ntawm 'cov txheej txheem khoom'. Ib qho kev txhoj puab heev tuaj yeem tshuab plhaub sib nrug los ntawm lub zog siab. Qhov kub tsis txaus thaum kawg ua rau lub plhaub tsis muaj zog thiab ua rau cov hlau nkag mus.
Rau cov cores nyuaj lossis cov lim dej ceramic hauv cov pwm, lub voj voog hluav taws xob tseem ceeb dua. Cov no yog cov khoom siv ceramic sib txawv nrog lawv tus kheej nthuav dav nkhaus. Yog tias lawv tsis sib haum nrog lub plhaub tseem ceeb ntawm cov khoom siv thermal expansion, koj tau txais kev ntxhov siab tawg. Nws yog qhov system. Koj tsis tuaj yeem yuav cov khoom siv 'zoo' plhaub thiab 'zoo' cov khoom tseem ceeb; koj yuav tsum xyuas kom meej tias lawv ua hauj lwm ua ke los ntawm tag nrho cov thermal voj voog. Qhov no yog ib tug classic pitfall nyob rau hauv prototyping.
Kev Ua Tsis Taus Ua Tus Xib Fwb: Ib Qhov Kev Pom Tsis Zoo
Kuv qhov kev kawm tsis ua haujlwm feem ntau yog lub tiaj, zoo li lub phaj zoo li cov hlau nplaum. Peb siv cov txheej txheem fused silica plhaub. Ib feem tuaj tawm hneev nti, zoo li qos yaj ywm chips. Cov khoom siv tau zoo, lub plhaub tsis zoo. Qhov teeb meem yog qhov sib txawv txias. Cov npoo nyias nyias tau ruaj khov thiab cog lus ua ntej, rub rau ntawm qhov chaw tseem-molten, uas tom qab ntawd solidified nyob rau hauv kev ntxhov siab. Cov khoom siv lub plhaub nws tus kheej, thaum refractory, tsis muaj txoj cai permeability lossis thermal conductivity los txhawb kev txias txias. Peb daws nws los ntawm kev hloov mus rau lub plhaub kaw lus nrog cov ntsiab lus alumina ntau dua rau txoj haujlwm tshwj xeeb, uas tau hloov pauv cov cua sov rho tawm, thiab los ntawm kev ntxiv cov tswv yim txias ribs hauv cov qauv siv quav ciab nws tus kheej. Nws tau qhia kuv tias cov khoom siv pwm yog ib qho kev koom tes hauv cov txheej txheem solidification, tsis yog lub thawv passive xwb.
Coj Txhua Yam Ua Ke: Lub Khw Pem Hauv Ntej Qhov Tseeb
Yog li thaum koj ntsuas poob ciab cov ntaub ntawv pov thawj, koj tsis khaws cov khoom tawm ntawm lub txee. Koj nyob nraum orchestrating ib tug saw ntawm sib xws, reactive tshuaj. Cov siv quav ciab yuav tsum ua haujlwm nrog koj cov cuab yeej thiab cov txheej txheem sib dhos. Cov ntaub ntawv plhaub yuav tsum ua haujlwm nrog koj txoj kev tshem tawm cov quav ciab, koj cov hlau qhov kub thiab txias, thiab nws cov cim ua kom khov. Cov hlau yuav tsum yog qib thiab zoo haum rau cov kev ntxhov siab uas yuav pom. Thaum kawg, tag nrho cov txheej txheem yuav tsum ruaj khov txaus kom rov ua dua, batch tom qab batch.
Tias yog vim li cas kev koom tes nrog kev paub txog kev paub tsis yog tsuas yog hais txog outsourcing ib kauj ruam. Koj tab tom tapping rau hauv lawv qhov tob, feem ntau nyuaj-yeej, cov ntaub ntawv thiab txheej txheem database. Ib tug ruaj zoo li QSY tsis yog muag castings xwb; lawv tau muag daim ntawv thov raug ntawm peb lub xyoo caum ntawm kev sib cuam tshuam ntawm cov khoom siv - paub txog lub plhaub twg uas ua rau lub tshuab ua tau zoo ntawm lawv. tshwj xeeb alloys, los yog yuav ua li cas kho lub preheat rau ib tug complex nyias-wall steel tivthaiv. Cov ntaub ntawv yog cov khoom xyaw, tab sis daim ntawv qhia tiag tiag yog nyob rau hauv lub khw lub logbooks thiab cov kws txawj 'instincts. Koj tuaj yeem yuav tib cov hmoov thiab waxes lawv ua, tab sis tsis muaj cov ntsiab lus ntawd, koj tsuas yog cia siab rau qhov zoo tshaj plaws. Hauv qhov kev ua si no, kev cia siab tsis yog lub tswv yim.
