Kugadzirwa kwegraphite crucible kwave kushanduka zvakanyanya nekuuya kweiyo isostatic yekutsikirira tekinoroji, ichimaka seyakanyanya hunyanzvi pasi rose. Mukuenzanisa nemaitiro echinyakare ramming, isostatic kudzvanya inoguma mune crucibles ane yunifomu mameseji, yakakwira density, kugona kwesimba, uye kwepamusoro kuramba kune oxidation. Kushandiswa kwepamusoro-soro panguva yekuumbwa kunowedzera zvakanyanya kugadzirwa kwe crucible, kuderedza porosity uye kunowedzera kuwedzera kwekushisa kwekushisa uye kusagadzikana kwehutu, sezvinoratidzwa mumufananidzo 1. Munzvimbo ye isostatic, chikamu chimwe nechimwe che crucible chinosangana neuniform molding pressure, kuve nechokwadi chekugadzirisa zvinhu mukati mese. Iyi nzira, sezvakaratidzwa mumufananidzo 2, inokunda maitiro echinyakare ekumhanya, zvichiita kuti kuve nekuvandudzwa kwakanyanya mukuita kwecrucible.
1. Dambudziko Chirevo
Kunetseka kunomuka muchimiro chealuminium alloy insulation resistance wire crucible furace uchishandisa rammed graphite crucibles, nehupenyu hwemazuva angangoita makumi mana nemashanu. Mushure memazuva makumi maviri chete ekushandiswa, kuderera kunoonekwa mukupisa conductivity kunoonekwa, kunoperekedzwa ne micro-cracks pane yekunze kwe crucible. Mumatanho ekupedzisira ekushandiswa, kudonha kwakanyanya mukupisa conductivity kunoonekwa, zvichiita kuti crucible inenge isiri-conductive. Pamusoro pezvo, kutsemuka kwakawanda kwepasi kunokura, uye kubuda kwemavara kunoitika kumusoro kwecrucible nekuda kweoxidation.
Pakuongorora choto chinopisirwa, sezvakaratidzwa muMufananidzo 3, chigadziko chinoumbwa nezvidhinha zvakaturikidzana chinoshandiswa, chine chidzitiro chepasi chewaya inopikisa iri 100 mm pamusoro pechigadziko. Iyo yekumusoro yecrucible yakavharwa uchishandisa asbestos fiber magumbeze, akaiswa akatenderedza 50 mm kubva kunze kwemupendero, achiratidza akakosha abrasion pamucheto wemukati weiyo crucible pamusoro.
2. Itsva Tekinoroji Improvements
Kuvandudza 1: Kugamuchirwa kweIsostatic Pressed Clay Graphite Crucible (ine Low-Temperature Oxidation Resistant Glaze)
Kushandiswa kweiyi crucible kunowedzera zvakanyanya kushandiswa kwayo mualuminium alloy insulation furnaces, kunyanya maererano neoxidation kuramba. Graphite crucibles anowanzo oxidize pane tembiricha iri pamusoro pe400 ℃, nepo tembiricha yealuminium alloy furnaces iri pakati pe650 ne700 ℃. Macrucibles ane yakaderera-tembiricha oxidation-inodzivirira glaze anogona kunyatso kudzikisa oxidation maitiro patembiricha iri pamusoro pe600 ℃, kuve nechokwadi chenguva refu yakanaka yekupisa. Panguva imwe chete, inodzivirira kuderedzwa kwesimba nekuda kweoxidation, kuwedzera hupenyu hwecrucible.
Kuvandudza 2: Chigadziko Chechoto Kushandisa Graphite Yechinhu Chimwechete seCrucible
Sezvinoratidzwa muMufananidzo 4, kushandisa chigadziko chegraphite chechinhu chimwe chete necrucible inovimbisa kupisa kwakafanana kwepasi pe crucible panguva yekupisa. Izvi zvinodzikamisa tembiricha gradients zvinokonzerwa nekudziya kusina kuenzana uye zvinoderedza tsika yekutsemuka kunokonzerwa nekudziya kwepasi kusingaenzaniswi. Iyo yakatsaurirwa graphite base zvakare inovimbisa yakatsiga rutsigiro kune iyo crucible, kuenderana neyayo pasi uye kuderedza kushushikana-induced fractures.
Kuvandudzwa kwechitatu: Magadzirirwo Enzvimbo Yekuwedzeredza Kwevira (Mufananidzo 4)
- Yakavandudzwa yemukati mupendero wevhavha yechoto, zvinobudirira kudzivirira kusakara pamusoro pecrucible uye zvakanyanya kuwedzera kuvharika kwechoto.
- Kuve nechokwadi chekuti waya yekupikisa yakaenzana nechepasi pecrucible, ichivimbisa kukwana kwepasi kupisa.
- Kuderedza kukanganiswa kwepamusoro fiber gumbeze zvisimbiso pakudziya kwecrucible, kuve nechokwadi chekudziya kwakaringana pamusoro pecrucible uye kuderedza mhedzisiro yekudzika-tembiricha oxidation.
Kuvandudza 4: Kunatsa Crucible Kushandisa Maitiro
Usati washandisa, preheat the crucible muchoto pane tembiricha iri pasi pe200 ℃ kwemaawa 1-2 kubvisa hunyoro. Mushure mekupisa, kurumidza kukwidza tembiricha kusvika 850-900 ℃, kuderedza nguva yekugara pakati pe300-600 ℃ kuderedza oxidation mukati meiyi tembiricha. Zvadaro, dzikisa tembiricha kune tembiricha yekushanda uye unza aluminium liquid zvinhu kuti zvishande.
Nekuda kwehuori hwemagadzirirwo ekunatsa pamacrucibles, tevera mashandisirwo akakodzera mapuroteni. Kugara kubviswa slag kwakakosha uye kunofanirwa kuitwa kana crucible ichipisa, sezvo kuchenesa slag kunova kwakaoma neimwe nzira. Kutarisisa kucherechedzwa kwe crucible's thermal conductivity uye kuvapo kwekuchembera pamadziro ecrucible kwakakosha mumatanho ekupedzisira ekushandiswa. Kutsiva nenguva kunofanirwa kuitwa kudzivirira kurasikirwa kusingakoshi kwesimba uye kubuda kwealuminium fluid.
3. Kuvandudza Migumisiro
Hurefu hwehupenyu hweiyo yakagadziridzwa crucible inokosha, kuchengetedza kupisa conductivity kwenguva yakareba, pasina kuputika kwepamusoro kunoonekwa. Mhinduro yemushandisi inoratidza kuvandudzwa kwekuita, kwete chete kuderedza mutengo wekugadzira asiwo kuwedzera zvakanyanya kugadzirwa.
4. Mhedziso
- Isostatic yakatsikirirwa yevhu graphite crucibles kupfuura echinyakare crucibles maererano nekuita.
- Chimiro chechoto chinofanira kuenderana nehukuru uye chimiro che crucible kuitira kushanda kwakakwana.
- Kushandiswa kwakakodzera kwecrucible kunowedzera hupenyu hwayo, kunyatso kudzora mutengo wekugadzira.
Kuburikidza nekutsvagisa kwakadzama uye optimization yecrucible choto tekinoroji, iyo yakakwidziridzwa mashandiro uye hupenyu hunobatsira zvakanyanya mukuwedzera kugadzirwa kwekugadzira uye kuchengetedza mutengo.
Nguva yekutumira: Zvita-24-2023