Ho khetha se nepahetseng ceramic slurry bakeng sa fektheri e lahlehileng ea boka ba boka ts'ebetso ha e mabapi le ho kopanya phofo le metsi-e mabapi le ho laola microstructure, dimensional repeatability, le botšepehi ba khetla pele lerotholi la pele la tšepe e qhibilihisitsoeng le phalla. Re bone litsi tse ngata haholo tsa li-foundation tse lahlang 30% ea betch-eseng ho tsoa ho sekoli, empa ho tsoa ho khetla, ho ba mahlahahlaha ho feta Ra 6.3 µm, kapa ho petsoha nakong ea dewaxing. Ho hloleha hoo ho qala nako e telele pele sebōpi se tuka. E qala ka tlhahiso ea slurry, taolo ea rheology, le taeo ea ts'ebetso.
Ke Hobane'ng ha Ts'ebetso ea Slurry e Laela ho Fana - Eseng Feela Qetello e Ntle
Baenjiniere ba bangata ba tšoara slurry ea ceramic e le "black box" binder system. Empa ka ho lahla matsete a holimo-haholo-holo bakeng sa li-valve tsa hydraulic, matlo a pompo, kapa li-nozzles tsa cobalt alloy - slurry ke lera la pele le sebetsang. Kabo ea boholo ba likaroloana tsa eona (hangata 0.5-15 µm bakeng sa li-zircon / mullite blends), li-binder solids content (28-32% bakeng sa litsamaiso tse thehiloeng ho ethyl silicate), le index ea thixotropic e khetholla ka ho toba: matla a botala ba khetla (> 1.8 MPa pele ho mollo), katoloso ea mocheso e tsamaisanang le boka ba boka.<0.3% e fapane ho 150°C), le masalla a ho khathala (<0.05 wt% molora ka mora 900°C). Re ile ra lekanya sena ho pholletsa le mabelo a tlhahiso ea 47: ha viscosity e hoholeha ho feta 18-22 cP ho 25 ° C (e lekantsoe ka 100 rpm ho Brookfield LVDV-II+), phapang ea botenya ba khetla e phahamisitsoe ke 42%, 'me ho hasana ha mahlakore a bohlokoa ho ile ha eketseha ho tloha ho ± 0.0.1 mm ho ea ho ± 0.0.3 mm.
Ke ka lebaka leo lifeme tsa maemo a holimo li sa rekeng slurry feela - li e tšoaneleha ka sehlopha ka seng. Ba lekola nako ea gel khahlano le ASTM F2212, ba netefatsa botsitso ba pH lipakeng tsa 2.8-3.4, 'me ba lekola phallo e sa tsitsang ka li-curve tsa tahlehelo-on-ignition (LOI). Pompo e le 'ngoe ea OEM ea Europe eo re neng re e tšehelitse e ne e hloka ≤0.8% ho honyela ha mela ho likhetla tse chesitsoeng—e ka finyelloang feela ka litekanyo tse laoloang tsa mullite-to-zircon le nako e tiileng ea binder hydrolysis. Li-slurries tse tloaelehileng tsa "off-the-shelf" ha se hangata li kopanang le seo.
Mekhoa e mene ea ho hloleha ha 'nete ea lefats'e-le mokhoa oa ho e emisa pele ho dewaxing
Litaba tsa seretse ha se hangata li itlhahisang ka lialamo. Ba hoeshetsa ka matšoao:
- Mapetso a dewaxing: E bakoa ke ho falla ha mongobo ka potlako nakong ea mouoane oa autoclaving-o lokisitsoeng ka ho lokisa binder crosslink density le ho eketsa 0.15-0.25% colloidal silica e le mofetoleli oa marang-rang.
- Ho koaheloa ka holim'a litšepe tse sa hloekang: E lateloa ho li-ion tse setseng tsa chloride (> 50 ppm) ka har'a li-alumina sol binders-e rarolloa ka ho fetohela ho li-alumina hydrate tse se nang chloride.
- Shell delamination ka mor'a ho thunngoa: E hokahane le khokahano e sa lekaneng ea li-interlayer-e rarollotsoe ka ho ntlafatsa nako ea ho lula ea dip (12-18 sec) le ho sebelisa li-slurries tse latellanang: seaparo sa "backup" se mahoashe (100-200 mesh stucco), seaparo se setle sa sefahleho (325 mesh), le seaparo sa "ultrafine seal" (submicron zircon)
- Ho hoholeha ha dimensional likarolong tse nang le mabota a masesaane: E khannoa ke khatello e sa lekaneng ea ho omisa-e fokotsoa ke likamore tse omisang tse laoloang ke mongobo (45–55% RH, 22–25°C) le litselana tsa lebelo la moea.
Re kile ra thusa moreki oa Asia Boroa-bochabela ho fokotsa rework e amanang le khetla ho tloha ho 19% ho isa ho 2.3% ka libeke tse ts'eletseng-eseng ka ho fetola barekisi, empa ka ho kenya li-viscometers tse ka hare ho litanka tsa bona tsa dip le ho bala ho amanang le data ea CMM mabapi le li-castings tsa ho qetela. Coefficient ea khokahano? 0.87.
Seo Molekane oa 'Nete oa Ceramic Slurry a se Fanang—Ka Nģ'ane ho Bucket
E ka tšeptjoang ceramic slurry bakeng sa fektheri e lahlehileng ea boka ba boka molekane o etsa lintho tse tharo tseo barekisi ba bangata ba ke keng ba li etsa:
- E arolelana litokomane tse felletseng tsa tekheniki: Eseng feela maqephe a SDS-empa li-histogram tsa boholo ba likaroloana, litlaleho tsa karolo ea XRD, le lichate tsa binder hydrolysis kinetics
- E netefatsa ts'ebetso ho geometry ea hau: E tsamaisa li-dips ho latela lipaterone tsa hau tsa boka, e lekanya botenya ba khetla ka li-eddy-current probes, 'me e hokahanya liphetho ho lipehelo tsa hau tsa metallurgic (mohlala, litlhoko tsa boholo ba lijo-thollo tsa AMS 5387)
- E kopanya le litsamaiso tsa hau tsa ts'ebetso: E fana ka lintlha tsa tšebelisano tse thellang bakeng sa lisebelisoa tsa hau tse teng tsa stucco, liparamente tsa potoloho ea dewaxing, le li-profiles tsa ho thunya - ha ho na khakanyo mabapi le litefiso kapa linako tsa ho ts'oara
Boemo bona ba ho kopanya bo arola barekisi ba thepa ho balekane ba boenjiniere. Ke ka lebaka leo baetsi ba kang QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD-e hlahisang likarolo tsa pompo ea motsoako oa cobalt tse hlokang zero ka hare porosity le ± 0.03 limilimithara bore mamello-hloka slurry traceability ho fihlela palo lotho, ho akarelletsa le disetifikeiti tse tala tsa tlhahlobo le litlaleho tsa motho oa boraro refractory sebopeho.
Ho Sheba Pele: Slurry Intelligence Ha e sa Khetho
Moeli o latelang ha se feela k'hemistri e betere-ke maikutlo a nako ea sebele. Hona joale re kenya litanka tsa slurry tse lumelletsoeng ke IoT tse hlokomelang mocheso, viscosity, le pH metsotsoana e meng le e meng e 90, li-auto-adjusting binder dosing ka lipompo tsa peristaltic tse amanang le PLC. Bahoeletsi ba pele ba tlaleha 37% e fokolang ea li-NCR tse amanang le likhetla le 22% ka potlako ho fumana mangolo a malapa a macha a alloy (joaloka T800 cobalt-based superalloys).
Empa theknoloji feela e ke ke ea lokisa metheo e fokolang. Qala mona: hlahloba tsela eo u sebetsang ka eona ha joale. Na u lekanya viscosity letsatsi le leng le le leng-kapa feela "ho hlahloba ho tsitsisa"? A na u ngola li-curve tsa khatello ea dewaxing hammoho le tahlehelo ea boima ba khetla? Na kabo ea hau ea likaroloana tsa stucco e netefalitsoe ho latela ISO 13320? Haeba karabo leha e le efe ke "che," ke moo ho lutla ha lihlahisoa ho qalang teng.
Hobane ka mokhoa o nepahetseng oa ho etsa matsete, slurry ha se feela ho roala mohlala. E hlalosa moeli pakeng tsa katleho le sekhechana-micron e le 'ngoe ka nako.
