Raws li cov cuab yeej tseem ceeb hauv kev siv tshuab niaj hnub casting,silicon carbide crucibletau maj mam dhau los ua lub thawv nyiam rau cov hlau tsis-ferrous smelting vim nws cov kev ua tau zoo heev thiab cov khoom siv tshwj xeeb. Tshwj xeeb tshaj yog thaum ua cov hlau kub kub melts, silicon carbide crucibles nthuav tawm cov kev ua haujlwm tseem ceeb. Tsab ntawv xov xwm no yuav qhia meej txog cov yam ntxwv ntawm kev ua haujlwm ntawm silicon carbide crucibles, nws daim ntawv thov hauv cov txheej txheem casting, thiab yuav ua li cas muab cov kev daws teeb meem zoo thiab txhim khu kev qha rau niaj hnub casting tuam txhab.
1. Dab tsi yog silicon carbide crucible?
Silicon carbide crucible yog lub thawv kub kub siv silicon carbide (SiC) ua cov khoom tseem ceeb. Nws yog tsuas yog siv rau smelting thiab ua ntau yam hlau thiab alloys. Silicon carbide yog cov khoom siv hluavtaws uas tsis tshua muaj siab hardness thiab kub tsis kam. Nws yog dav siv nyob rau hauv high-tech teb xws li ceramics, metallurgy, thiab semiconductors.
Vim tias silicon carbide crucibles muaj lub cev zoo thiab tshuaj lom neeg xws li cov thermal conductivity, tsis tshua muaj thermal expansion coefficient, thiab corrosion tsis kam, lawv muaj kev ruaj ntseg tsis sib xws thiab ua haujlwm nyob rau hauv qhov kub thiab txias.
2. Technical zoo ntawm silicon carbide crucible
1. Kev kub siab ua haujlwm zoo heev
Silicon carbide crucibles muaj cov cua kub tsis tshua muaj siab thiab tuaj yeem tiv taus kub tshaj 1600 ° C. Qhov no ua rau lawv zoo tagnrho rau smelting high-temperature hlau xws li tooj liab, txhuas thiab npib tsib xee. Piv nrog rau cov crucibles ua los ntawm lwm cov ntaub ntawv, lub zog ntawm silicon carbide crucibles tsis txo qis nyob rau hauv qhov kub thiab txias tej yam kev mob, ua kom nws cov duab stability thaum lub sij hawm smelting txheej txheem.
Qhov kev tiv thaiv kub kub zoo no pab cov tuam txhab kom tsis txhob crucibles los ntawm deforming los yog tawg vim qhov kub thiab txias, yog li txhim kho kev tsim khoom txuas ntxiv thiab ua haujlwm tau zoo.
2. Cov thermal conductivity zoo heev
Lwm qhov tseem ceeb ntawm cov khoom siv silicon carbide yog nws cov thermal conductivity, uas tso cai rau kev hloov pauv sai thiab txawm tias cua sov. Qhov no txhais tau hais tias thaum lub sij hawm smelting txheej txheem, cov hlau molten tuaj yeem ncav cuag qhov kub thiab txias, txo lub sij hawm melting thiab txhim kho ntau lawm efficiency.
Qhov no thermal conduction kuj txo cov overheating ntawm cov hlau molten, pab kom ua tiav ntau yam kub tswj thaum lub sij hawm casting txheej txheem thiab xyuas kom meej zoo zoo casting.
3. Tsawg thermal expansion coefficient
Lub coefficient ntawm thermal expansion yog hais txog qhov uas cov khoom nthuav dav hauv ntim thaum rhuab. Silicon carbide muaj cov coefficient tsawg heev ntawm thermal expansion, uas txhais tau hais tias nws hloov me ntsis loj thaum rhuab. Yog li ntawd, txawm tias nyob rau hauv ib puag ncig uas muaj qhov kub thiab txias hloov pauv, cov silicon carbide crucible tuaj yeem tswj tau nws cov duab qub thiab tsis txhob tawg lossis puas vim qhov nthuav tawm lossis kev cog lus.
Qhov qis thermal expansion yog tshwj xeeb tshaj yog haum rau cov txheej txheem casting uas nquag cua sov thiab cua txias, ua kom ntev lub neej kev pab cuam ntawm lub crucible.
4. Zoo heev corrosion kuj
Thaum lub sij hawm smelting txheej txheem, cov hlau molten reacts nrog lub crucible, maj eroding nws nto. Txawm li cas los xij, cov khoom siv silicon carbide muaj cov tshuaj tiv thaiv zoo heev thiab tuaj yeem tiv taus qhov yaig ntawm cov kua hlau, tshwj xeeb tshaj yog thaum cuam tshuam nrog cov hlau tsis zoo xws li tooj liab thiab txhuas.
Zoo corrosion kuj tsis tsuas yog ncua lub neej kev pab cuam ntawm lub crucible, tab sis kuj txo impurity pa phem tshwm sim los ntawm corrosion ntawm lub crucible nto, xyuas kom meej lub purity ntawm cov hlau kua thiab txhim kho qhov zoo ntawm cov khoom kawg.
5. Muaj zog txhua yam
Silicon carbide crucibles tuav lub zog txhua yam txawm tias qhov kub thiab txias, ua rau lawv tsis tshua tawg lossis deform. Cov yam ntxwv ntawm lub zog siab no ua rau lub crucible tuaj yeem tiv taus qhov cuam tshuam ntawm cov hlau molten thiab lwm yam kev ntxhov siab, tswj kev ruaj ntseg thaum lub sij hawm kub smelting.
6. Zoo thermal shock stability
Thermal shock stability yog hais txog lub peev xwm ntawm cov khoom siv los tiv thaiv kev tawg thaum kub hloov sai. Silicon carbide crucibles pom zoo thermal shock stability thiab muaj peev xwm tiv taus kub hloov ceev yam tsis muaj cracking. Qhov no yog qhov tseem ceeb tshwj xeeb rau cov txheej txheem casting uas yuav tsum tau ua kom sov thiab txias.
peb. Kev siv ntawm silicon carbide crucible
Vim nws qhov kub thiab txias tsis kam, thermal conductivity, thiab corrosion kuj, silicon carbide crucibles yog dav siv nyob rau hauv ntau yam hlau smelting thiab casting txheej txheem, tshwj xeeb tshaj yog nyob rau hauv lub smelting ntawm non-ferrous hlau thiab alloys. Cov hauv qab no yog ob peb yam kev siv scenarios:
Copper Casting: Thaum smelting tooj liab,silicon carbide crucibles tuaj yeem ua kom lub cev kub tsis sib xws, txo qhov tsim ntawm impurities, thiab txhim kho qhov zoo ntawm tooj liab.
Aluminium thiab aluminium alloy smelting: Aluminium yooj yim reacts nrog lub crucible thaum lub sij hawm smelting txheej txheem, tab sis corrosion kuj ntawm silicon carbide zoo tiv thaiv lub crucible los ntawm txhuas corrosion thiab ncua nws cov kev pab cuam lub neej.
Lwm yam kub kub smelting: Silicon carbide crucible kuj tsim nyog rau smelting high-temperature hlau xws li zinc thiab npib tsib xee, thiab muaj zog adaptability.
Plaub. Kev siv thiab txij nkawm ntawm silicon carbide crucible
Txhawm rau txuas ntxiv kev pab cuam lub neej ntawm silicon carbide crucibles, kev siv kom raug thiab kev saib xyuas yog qhov tseem ceeb. Nov yog qee cov lus qhia:
Preheat lub crucible: Ua ntej pib siv lossis rov siv dua, nws raug nquahu kom maj mam preheat lub crucible rau qhov kub thiab txias kom tsis txhob muaj cua sov thiab tawg.
Tsis txhob ua cua sov sai thiab txias: Txawm hais tias silicon carbide crucibles muaj thermal shock stability zoo, kev hloov kub ceev heev tseem tuaj yeem ua rau lub crucible puas.
Kev tshuaj xyuas tsis tu ncua: Thaum siv, tsis tu ncua xyuas lub ntsej muag crucible rau cov cim ntawm cov kab nrib pleb lossis corrosion, thiab daws cov teeb meem tshwm sim raws sijhawm.
Post lub sij hawm: Sep-05-2024