Overview Iyo Graphite Crucible

Overview
Iyo graphite crucibleinogadzirwa kubva kune yakasikwa flake graphite sechinhu chikuru mbishi, uye inogadziriswa nepurasitiki refractory ivhu kana kabhoni seanosungira. Iyo ine hunhu hwekupikisa kwekushisa kwepamusoro, kusimba kwekushisa kwekushisa, kunaka kwekudzivirira kwecorrosion, uye hupenyu hurefu hwebasa. Munguva yekushandiswa kwepamusoro-tembiricha, iyo coefficient yekuwedzera kwemafuta idiki, uye ine kumwe kuomesa kwemaitiro ekukurumidza kutonhora nekudziya. Iyo ine yakasimba corrosion kuramba kune acidic uye alkaline mhinduro, yakanakisa kugadzikana kwekemikari, uye haina kutora chikamu mune chero maitiro emakemikari panguva yekunyungudika. Rusvingo rwemukati rwe graphite crucible rwakatsetseka, uye simbi yakanyungudutswa yesimbi haisi nyore kudonha uye kunamatira mukati memadziro emukati, ichiita kuti simbi yesimbi ive nekuyerera kwakanaka uye kugona kukanda, yakakodzera kukanda uye kugadzira akasiyana molds. Nekuda kwehunhu hwakanakisa huri pamusoro apa, ma graphite crucibles anoshandiswa zvakanyanya mukunyungudika kwealloy tool simbi uye asiri-ferrous simbi uye alloys ayo.

Type
Graphite crucibles inonyanya kushandiswa kunyunguduka kwezvinhu zvesimbi, izvo zvakakamurwa kuva marudzi maviri: girafu yechisikigo uye yekugadzira graphite.
1) Natural graphite
Iyo inonyanya kugadzirwa neakasikwa flake graphite seyakanyanya mbishi zvinhu, pamwe nekuwedzera kwevhu uye zvimwe zvinoramba mbishi zvinhu. Inowanzonzi clay graphite crucible, ukuwo kabhoni binder type crucible inogadzirwa neasphalt sebhainda. Inogadzirwa chete nesimba rinopisa revhu uye inonzi Hui clay binder type crucible. Iyo yekutanga ine simba repamusoro uye kupisa kwekutya kusagadzikana. Inoshandiswa kunyungudusa simbi, mhangura, alloys yemhangura, nedzimwe simbi dzisina ferrous, dzine hukuru hwakasiyana-siyana nekunyunguduka kubva pa250g kusvika pa500kg.
Rudzi urwu rwecrucible runosanganisira zvishongedzo senge skimming spoon, lid, joint ring, crucible support, uye inomutsa tsvimbo.
2) Artificial graphite
Iwo echisikigo magirafu crucibles ataurwa pamusoro anowanzo aine anenge 50% evhu maminerari, nepo kusvibiswa (madota emukati) muakagadzirwa graphite crucibles ari pasi pe1%, anoshandiswa kunatsa-yakanyanya kuchena simbi. Kune zvakare yakakwirira-kuchena graphite iyo yakaitwa yakakosha kurapwa (ash yemukati <20ppm). Artificial graphite crucibles inowanzoshandiswa kunyungudutsa zvidiki zvesimbi dzinokosha, simbi dzakachena, kana simbi yakakwira yekunyungudika uye okisijeni. Inogona zvakare kushandiswa se crucible yekuongorora gasi musimbi.

Nzira yekugadzira
Iyo nzira yekugadzira ye graphite crucibles inogona kukamurwa kuita matatu marudzi: ruoko kuumba, kutenderera kuumbwa, uye kuumbwa kwekumanikidza. Hunhu hwe crucible hunoenderana zvakanyanya nemaitiro ekuumba nzira. Iyo yekugadzira nzira inotarisisa chimiro, density, porosity, uye simba remagetsi remuviri unorovera.
Maoko akaumbwa macrucibles ezvinangwa zvakakosha haagone kuumbwa uchishandisa rotary kana compression molding nzira. Mamwe macrucible akakosha akaumbwa anogona kuumbwa nekubatanidza rotary kuumba uye kuumba ruoko.
Rotary molding inzira iyo inotenderera inogona muchina kutyaira mold kuti ishande uye inoshandisa banga remukati kuburitsa ivhu kupedzisa kuumbwa kwe crucible.
Compression molding iko kushandiswa kwemidziyo yekumanikidza yakadai seoiri, kudzvanywa kwemvura, kana kudzvanywa kwemhepo sesimba rekinetic, kushandisa mold dzesimbi semidziyo yepurasitiki yekuumba crucible. Kuenzaniswa neinotenderera nzira yekuumba, ine zvakanakira nzira iri nyore, kupfupika kwekugadzira kutenderera, goho rakakura uye kugona, kuderera kwekushanda kwesimba, kuderera kwehunyoro hwekuumbwa, kuderera kwe crucible shrinkage uye porosity, yakakwirira chigadzirwa mhando uye density.

Kuchengeta uye kuchengetedza
Graphite crucibles inofanira kuchengetedzwa kubva kune unyoro. Graphite crucibles inotya zvakanyanya kunyorova, izvo zvinogona kuita zvakakosha pamhando. Kana ikashandiswa ne crucible yakanyorova, inogona kukonzera kutsemuka, kuputika, kudonha kwemucheto, uye kudonha pasi, zvichikonzera kurasikirwa kwesimbi yakanyungudutswa uye kunyangwe njodzi dzine chekuita nebasa. Naizvozvo, kana uchichengeta uye uchishandisa graphite crucibles, kutarisisa kunofanirwa kubhadharwa kudzivirira unyoro.
Imba yekuchengetera magirafu crucibles inofanira kunge yakaoma uye inofefetera, uye tembiricha inofanirwa kuchengetedzwa pakati pe5 ℃ ne25 ℃, ine hunyoro hwe50-60%. crucibles haifanirwe kuchengetwa pavhu rezvidhinha kana pasirendi semende kudzivirira unyoro. Iyo yakawanda graphite crucible inofanira kuiswa pamapuranga, zvichida 25-30cm pamusoro pevhu; Yakaputirwa mumabhokisi emapuranga, mabhasikiti, kana masaga eshanga, zvekurara zvinofanira kuiswa pasi pemapallet, kwete pasi pe20cm kubva pasi. Kuisa mutsetse wekunzwa pane vanorara kunobatsira zvakanyanya kuvharisa hunyoro. Munguva yeimwe nguva yekuturika, zvinodikanwa kurongedza jira rezasi kumusoro pasi, zviri nani nepamusoro uye pasi machira akatarisana. Iyo nguva pakati pe stacking uye stacking haifaniri kunge yakareba. Kazhinji, stacking inofanira kuitwa kamwe chete mwedzi miviri. Kana hunyoro hwevhu husina kukwirira, kusungirirwa kunogona kuitwa kamwe chete pamwedzi mitatu. Muchidimbu, kugara kurongedza kunogona kuwana yakanaka hunyoro-uchapupu mhedzisiro.