Nyob rau hauv lub tshuab tsis tshua muaj siab tuag casting (LPDC), lub riser raj plays lub luag hauj lwm txiav txim siab nyob rau hauv molten aluminium hloov. Ib qho ntawm cov lus nug ntau tshaj plaws los ntawm foundry engineers yog:
Silicon nitride riser raj siv tau ntev npaum li cas?
Cov lus teb yog nyob ntawm kev ua haujlwm - tab sis nyob rau hauv feem ntau aluminium casting ib puag ncig, siab - zoo silicon nitride riser raj tuaj yeem kav ntev li ob peb zaug ntau dua li cov hlau cam khwb cia lossis cov raj refractory.
Hom Kev Pabcuam Lub Neej hauv LPDC Daim Ntawv Thov
Raws li LPDC ruaj khov, lub raj silicon nitride riser feem ntau kav ntev:
6 mus rau 18 lub hlisnyob rau hauv cov kab ntau lawm
Qee zaum ntev dua nyob rau hauv qhov chaw ua kom zoo dua qub
2-5 lub sij hawm ntev tshaj li cam khwb cia hlau riser raj
Nyob rau hauv siab - ntim aluminium log casting nroj tsuag, ntau lub foundries qhia txog kev txo qis hauv kev hloov zaus tom qab hloov kho dua rau silicon nitride ceramic raj.
Txawm li cas los xij, kev ua neej tsis yog tsuas yog lub sijhawm - nws yog hais txog kev ruaj ntseg thiab sib xws thoob plaws hauv lub voj voog casting.
Vim li cas Silicon Nitride Riser Tubes kav ntev dua?
Lub neej ntev kev pab cuam ntawm silicon nitride ceramic riser hlab los ntawm cov khoom siv science, tsis yog coincidence.
Superior Resistance rau Molten Aluminium
Molten aluminium aggressively tawm tsam cov khoom siv hlau. Cam khwb cia hlau riser raj maj mam yaj, ua rau:
Phab ntsa thinning
Deg yaig
Oxide paug
Cov khoom siv silicone nitride muaj qhov tsis tshua muaj dej tsis zoo nrog molten aluminium thiab muaj zog corrosion kuj, tswj cov qauv kev ntseeg siab ntev mus.
Siab Thermal Shock Resistance
LPDC cov tshuab muaj kev rov ua cua sov thiab cua txias.
Silicon nitride ceramic muaj:
Tsawg thermal expansion
Siab tawg toughness
Zoo heev tawg kuj
Qhov no tiv thaiv kev tawg tam sim ntawd los ntawm thermal qaug zog - ib qho kev ua tsis tiav hauv cov khoom siv refractory.
Mechanical Strength nyob rau hauv siab
Thaum lub sij hawm tsis tshua muaj siab tuag casting, lub riser raj yuav tsum tiv taus qhov hloov pauv tsis tu ncua.
Si₃N₄ ceramic muaj lub zog flexural siab thiab ua kom muaj kev ruaj ntseg nyob rau hauv kev ua haujlwm siab. Qhov no ua kom cov dej ntws zoo thiab txo qis hauv lub raj.
Dab tsi cuam tshuam rau Kev Pabcuam Lub Neej?
Txawm hais tias silicon nitride riser raj yog ruaj, lifespan nyob ntawm ntau yam:
Kub kub stability
Aluminium alloy muaj pes tsawg leeg
Cov kev tswj xyuas
Installation raug
Kev tswj kev kub ntxhov
Kev teeb tsa tsis raug lossis kev cuam tshuam rau txhua yam tuaj yeem ua rau lub neej luv luv, txawm tias muaj cov khoom siv ua haujlwm siab -.
Kev tshuaj xyuas tsis tu ncua thiab tuav kom raug yog qhov tseem ceeb
Sib piv Silicon Nitride rau lwm cov ntaub ntawv
| Khoom siv | Nruab Nrab Lifespan | Corrosion Resistance | Tus Nqi Theem |
|---|---|---|---|
| Cast Iron | Luv luv | Tsawg | Tsawg |
| Aluminium Titanate | Nruab nrab | Zoo | Nruab nrab |
| Silicon Nitride | Ntev tshaj plaws | Zoo heev | Siab dua |
Txawm hais tias thawj tus nqi ntawm silicon nitride riser raj yog siab dua, tag nrho cov nqi ua haujlwm feem ntau qis dua vim:
Txo downtime
Tsawg dua hloov
Txhim kho casting tawm los
Tsawg kis kab mob
Nyob rau hauv tas li LPDC ntau lawm, qhov ntev - lub sij hawm ruaj khov no txhim kho cov txiaj ntsig zoo.
Cov cim Nws yog lub sij hawm los hloov lub Riser Tube
Txawm tias siab -kev ua tau zoo ceramic raj yuav tsum tau saib xyuas. Hloov lub riser raj yog tias koj saib:
Pom phab ntsa thinning
Nto tawg
Nce melt turbulence
Casting defect tus nqi nce
Siab tsis ruaj khov
Kev tiv thaiv kev hloov pauv ib txwm muaj tus nqi ntau dua - ua haujlwm tau zoo dua li kev cuam tshuam kev tsim khoom tsis tau xav txog.
Tus nqi tiag tiag: Kev ruaj ntseg dhau sijhawm
Thaum ntsuas seb lub raj silicon nitride riser kav ntev npaum li cas, cov lus nug tseem ceeb dua yog:
Koj cov txheej txheem casting ruaj khov npaum li cas thaum nws lub neej ua haujlwm?
Lub raj ntev dua - kav ntev txhais tau tias:
Kev ua kom huv huv tsis tu ncua
ruaj khov LPDC siab tswj
Txo qhov tsis xws luag casting
Predictable kev npaj kho
Qhov no yog vim li cas silicon nitride ceramic riser raj tau dav siv nyob rau hauv niaj hnub aluminium casting nroj tsuag.
Xaus
Nyob rau hauv feem ntau LPDC aluminium casting daim ntawv thov, silicon nitride riser raj tuaj yeem kav ntau lub voj voog ntau lawm - feem ntau ntau zaus ntev dua li cov khoom siv hlau.
Thaum lub neej ua haujlwm tiag tiag nyob ntawm kev ua haujlwm, kev sib xyaw ua ke ntawm kev tiv thaiv corrosion, thermal stability, thiab lub zog txhua yam ua rau silicon nitride cov kev daws teeb meem rau siab - kev ua haujlwm casting tshuab.
Yog tias koj tab tom ntsuas cov ntaub ntawv riser raj lossis npaj los hloov kho los ntawm cov hlau cam khwb cia, kev nkag siab txog kev ua haujlwm ntawm lub neej yog thawj kauj ruam mus rau kev txhim kho casting efficiency.
