Ekubunjweni kwesihlabathi, ngaphezu kwama-95% asebenzisa isihlabathi se-silica. Inzuzo enkulu yesihlabathi se-silica ukuthi ishibhile futhi kulula ukuyithola. Kodwa-ke, ukungalungi kwesihlabathi se-silica nakho kuyabonakala, njengokuzinza okuncane kokushisa, ukuguqulwa kwesigaba sokuqala kwenzeka cishe ku-570 ° C, izinga eliphezulu lokwanda okushisayo, ukuphuka kalula, futhi uthuli olukhiqizwa ikhefu luyingozi kakhulu empilweni yomuntu. . Ngesikhathi esifanayo, ngokuthuthuka okusheshayo komnotho, isihlabathi se-silica sisetshenziswa kabanzi embonini yezokwakha, imboni yengilazi, i-ceramics nezinye izimboni. Kukhona ukuntuleka kwesihlabathi se-silica esisezingeni eliphezulu nesizinzile. Ukuthola ezinye ezibambele kuyinkinga ephuthumayo yomhlaba wonke.
Namuhla ake sikhulume ngomehluko wezinye izihlabathi ezivamile eziluhlaza ebhizinisini le-Foundry, ngokusho kwethimba le-sndfoundry iminyaka eminingi nakho, futhi wamukele abangani abaningi ukujoyina inkulumo.
1.I-Common Raw Sands e-Foundry
1.1 Isihlabathi semvelo
Isihlabathi semvelo, esivela emvelweni, njengesihlabathi se-silica, isihlabathi se-chromite, isihlabathi se-zircon, isihlabathi somnqumo we-magnesium njll.
1.2 Isihlabathi sokwenziwa
Njengesihlabathi se-silica yokwenziwa, uchungechunge lwe-aluminium silicate yokwenziwa eyindilinga, njll.
Lapha sethula ikakhulukazi uchungechunge lwe-aluminium silicate yesihlabathi esiyindilinga sokwenziwa.
2. I-Aluminium silicate uchungechunge lwesihlabathi sokwenziwa esiyindilinga
Uchungechunge lwe-aluminium silicate yokwenziwa isihlabathi esiyindilinga, eyaziwa nangokuthi "isihlabathi se-ceramic Foundry", "Cerabeads", "ceramic ubuhlalu", "ceramsite", "Synthetic spherical sand for casting (isihlabathi senyanga)", "mullite ubuhlalu", "high refractoriness spherical isihlabathi", "Ceramcast", "Super sand", njll., awekho amagama afanayo emhlabeni futhi namazinga ahlukahlukene. (Sibiza isihlabathi se-ceramic kulesi sihloko)
Kodwa kukhona amaphuzu amathathu afanayo ukuwahlonza kanjena:
A. Ukusebenzisa i-aluminium silicate refractory materials (i-bauxite, i-kaolin, amagugu ashisiwe, njll.) njengezinto zokusetshenziswa,
B. Izinhlayiya zesihlabathi ziyindilinga ngemva kokuncibilika noma ukucwiliswa;
C. Ukwakheka kwamakhemikhali ikakhulukazi okuhlanganisa i-Al2O3, i-Si2O, i-Fe2O3, i-TiO2 nenye i-oxide.
Ngenxa yokuthi kukhona abakhiqizi abaningi eChina besihlabathi se-ceramic, kunemibala ehlukahlukene kanye nobuso obuvela ezinkambisweni ezahlukene kanye nendawo ehlukile yasekuqaleni yezinto ezingavuthiwe, nokuqukethwe okuhlukile kwe-Al2O3 kanye nezinga lokushisa lomkhiqizo.
3. Imingcele yesihlabathi ye-Foundry
| Skanye | NRD/℃ | T.E(20-1000℃)/% | B.D./(g/cm3) | E. | TC (W/mk) | pH |
| FCS | ≥1800 | 0.13 | 1.8-2.1 | ≤1.1 | 0.5-0.6 | 7.6 |
| SCS | ≥1780 | 0.15 | 1.4-1.7 | ≤1.1 | 0.56 | 6-8 |
| Zircon | ≥1825 | 0.18 | 2.99 | ≤1.3 | 0.8-0.9 | 7.2 |
| Ci-hromite | ≥1900 | 0.3-0.4 | 2.88 | ≥1.3 | 0.65 | 7.8 |
| U-Olive | 1840 | 0.3-0.5 | 1.68 | ≥1.3 | 0.48 | 9.3 |
| Silica | 1730 | 1.5 | 1.58 | ≥1.5 | 0.49 | 8.2 |
Qaphela: Izihlabathi ezihlukene zemboni nendawo, idatha izoba nomehluko othile.
Nansi idatha evamile.
3.1 Izimpawu zokuphola
Ngokwefomula yamandla abandayo, amandla okugodola esihlabathi ahlobene ngokuyinhloko nezici ezintathu: ukuqhutshwa kwe-thermal, umthamo wokushisa othize, kanye nokuminyana kwangempela. Ngeshwa, lezi zici ezintathu zihlukile esihlabathini esivela kubakhiqizi abahlukene noma imvelaphi, ngakho-ke ekuthuthukisweni Ngesikhathi senqubo yokufakwa kwensimbi engagugi, sithole ukuthi isihlabathi se-chromite sinomphumela ongcono kakhulu wokupholisa, isivinini sokupholisa okusheshayo, kanye nokumelana nokuguga okuphezulu. ubulukhuni, kulandele isihlabathi se-ceramic esihlanganisiwe, isihlabathi se-silica, nesihlabathi se-ceramic esihlanganisiwe. , ubulukhuni bokumelana nokugqoka bokukhishwa buzoba ngaphansi ngamaphuzu angu-2-4.
3.2 Ukugoqa ukuqhathanisa
Njengesithombe esingenhla, izinhlobo ezintathu zesihlabathi zigcina amahora angu-4 no-1590 ℃ esithandweni somlilo.
I-sintered ceramic sand collapsibility iyona engcono kakhulu. Lesi sakhiwo siphinde sasebenza ngempumelelo emkhiqizweni we-Aluminium casting.
3.3 Amandla okuqhathanisa isikhunta sesihlabathi se-Foundry
ATyena nemingcele resin camera isihlabathi isikhunta for foundry
| Izihlabathi | I-HTS(MPa) | I-RTS(MPa) | I-AP(Pa) | Isilinganiso se-LE (%) |
| CS70 | 2.1 | 7.3 | 140 | 0.08 |
| CS60 | 1.8 | 6.2 | 140 | 0.10 |
| CS50 | 1.9 | 6.4 | 140 | 0.09 |
| CS40 | 1.8 | 5.9 | 140 | 0.12 |
| I-RSS | 2.0 | 4.8 | 120 | 1.09 |
Qaphela:
1. Uhlobo lwe-resin nenani kuyefana, isihlabathi sokuqala siwusayizi we-AFS65, kanye nezimo ezifanayo zokumboza.
2. CS: Isihlabathi se-Ceramic
I-RSS: Isihlabathi se-Silica Egazingiwe
I-HTS: Amandla okuqina ashisayo.
I-RTS: Amandla aqinile wegumbi
AP: Ukungena komoya
Isilinganiso se-LE: Izinga lokunwetshwa kolayini.
3.4 Izinga elihle kakhulu lokubuyiselwa kwesihlabathi se-ceramic
Indlela yokubuyisela eshisayo neyomshini kokubili isihlabathi se-ceramic esifanelekile esifanelekile, ngenxa yamandla aso aphezulu wezinhlayiyana, ubulukhuni obuphezulu, ukumelana nokugqoka okuphezulu, isihlabathi se-ceramic cishe yizikhathi eziphakeme kakhulu zokuvuselela isihlabathi esiluhlaza ebhizinisini le-sand foundry. Ngokusho kwedatha yokubuyiselwa kwamakhasimende ethu asekhaya, isihlabathi se-ceramic singabuyiswa okungenani izikhathi ezingu-50. Nazi ezinye izimo ezabelana ngazo:
Eminyakeni eyishumi muva nje, ngenxa yesihlabathi se-ceramic refractoriness ephezulu, ukwakheka kwebhola okungasiza ukunciphisa ukungezwa kwe-resin cishe ngo-30-50%, ukwakheka kwengxenye efanayo kanye nokusatshalaliswa kosayizi wokusanhlamvu okuzinzile, ukungena komoya okuhle, ukunwetshwa okuncane okushisayo nezici zokuvuselela kabusha ezivuselelekayo njll., njengento engathathi hlangothi, iyasebenza kakhulu ekubunjweni okuningi okuhlanganisa insimbi ecijile, insimbi ecijile, i-aluminium ephonsiwe, ithusi elicijile, nensimbi engagqwali. Izinqubo zokufaka isicelo zinesanti eboshwe nge-Resin, isihlabathi sebhokisi elibandayo, inqubo yesihlabathi sokuphrinta se-3D, isihlabathi se-No-bake resin, inqubo yokutshala imali, inqubo yegwebu elilahlekile, inqubo yengilazi yamanzi njll.
Isikhathi sokuthumela: Jun-15-2023
