Indlela yokukhiqiza ye-silicon carbide e-reactive sintering

I-Reaction-sintered silicon carbide uhlobo olusha lwe-ceramics yobuchwepheshe obuphezulu, enamandla aphezulu, ubulukhuni obuphezulu, ukumelana okuhle nokugqwala kanye nokumelana nokugqwala, futhi isetshenziswa kabanzi kwezensimbi, i-petrochemical, i-electronics, i-aerospace kanye neminye imikhakha. Umkhiqizo one-silicon carbide abrasive assistant carbon black, i-graphite kanye nezithasiselo ezahlukahlukene, usebenzisa izindlela zokucindezela ezomile, i-extrusion noma zokuthulula ukwenza ikhwalithi evuvukele, bese kuba okulandelayo ukuze kuqondwe indlela yokukhiqiza ye-reactive sintering silicon carbide!

I-silicon carbide e-reactive sintering Lokhu kusungulwa kuwuhlelo lobuchwepheshe oluvuthiwe ngemva kokuhlolwa okuyizinkulungwane ngumsunguli iminyaka eminingi ukukhuthaza ifomula yezinto zokusetshenziswa kanye nenqubo yokukhiqiza, ikakhulukazi inqubo ehlukile eqhubekayo yokucubungula.

Esimangalweni 1 salokusungulwa, ingxenye yesisindo sempuphu ye-silicon carbide iyizingxenye ezingu-5 ~ 8, i-carbon black iyizingxenye ezingu-0.5-1.5, i-graphite iyizingxenye ezingu-1-1.5, kanti i-binder iyizingxenye ezingu-0.1-0.5. Phakathi kwazo, ubukhulu be-grain gradient ye-silicon carbide yizingxenye ezingu-sic (90-30m) izingxenye ezingu-3-5, sic) 30-0.8m) izingxenye ezingu-2-3. I-methyl cellulose kanye nempuphu ye-PVA ye-gazelle kwafakwa emanzini afanele izingxenye ezingu-0.1-0.5 ngokulandelana, futhi ikhambi elibonakalayo latholakala ngemva kokushisa.

1. Hlanganisa zonke izinhlobo zama-powder, izinti zokunamathisela kanye nezixazululo ezilungiselelwe ngokwefomula bese uvuselela kahle.

2, hlanza i-casting mold vacuum, ufinyelele ku-0.1Mpa, ufake ingcindezi ku-slurry exubile. Ngemva kwesikhathi esithile, i-slurry iyakhululwa bese i-blank ikhishwa. Gcina ku-30-70 amahora angu-18-20 ukuze yome.

3. Sika i-billet ngokwezidingo zomdwebo.

4, faka i-billet yokusabela esithandweni somlilo, engeza isisindo sezingxenye ezingu-1-3 ze-silicon yensimbi, i-vacuum sintering. Inqubo ihlukaniswe ngezinga lokushisa eliphansi 0-700, igcinwe amahora angu-3-5; Izinga lokushisa eliphakathi 700-1400, gcina amahora angu-4-6; Gcina ekushiseni okuphezulu 1400-2200 amahora angu-5-7. Yehlisa izinga lokushisa ngaphansi kuka-150, misa isithando somlilo bese uvula isithando somlilo.

5, umkhiqizo wokugaya wokwelashwa kokuqhumisa isihlabathi, ohlanganisa i-silicon slag, kanye nokugaya kokuqhumisa isihlabathi.

6, imikhiqizo yokwelapha i-oxidation esithandweni se-oxidation, amahora angama-24 kuya ku-1350, ukupholisa kwemvelo. Khipha, hlola bese ubeka endaweni yokugcina.

Izinto zokusetshenziswa kanye nesilinganiso esamukelwe yindlela yokusungula izinto zingokwesayensi futhi zinengqondo, ukuze indawo engenalutho ibe nokuntuleka okwanele futhi indawo engenalutho ibe nobuningi obungcono; Izinga lokushisa elingcono lokushisisa, izinga lokushisa kanye nesikhathi sokubamba kuqinisekisa amandla aphezulu okugoba komkhiqizo. Ukusebenza okuyinhloko kanye nekhwalithi yale ndlela sekufinyelele ezingeni eliphakeme lomhlaba wonke. Izinkomba zayo eziyinhloko yilezi ezilandelayo

Ukuqaliswa kwe-silicon carbide ethize yokusabela

Indlela Yokwenza Ama-Silicon Carbide Ahlanganisiwe 1 Indlela Yokukhiqiza Ama-Silicon Carbide Ahlanganisiwe Asebenzisa I-Reaction-Sintered:

1, ukuze uthathe isisindo se-glue esingu-0.3 izingxenye, engeza inani elithile lamanzi ngokulinganayo uvuselele, isisindo esingu-6.8 izingxenye ze-silicon carbide powder (usayizi wezinhlayiya ezingu-90-30m izingxenye ezingu-3.8, 30-0.8m izingxenye), i-carbon black ingxenye engu-1, emnyama

2. Uma uthela, qala uhlanze isikhunta esisetshenzisiwe, ulungise isikhunta, usilungise ngezibambo, ukhiphe isikhunta ethangini ngokucindezela, ugcwalise ithangi nge-nitrogen yokucindezela engu-0.1Mpa, uthele isikhunta ngokucindezela, bese ucindezela isikhunta esikhumbeni. Ngemva kokufika ehoreni eli-1, isikhunta siyakhululwa, futhi ngemva kwamahora ayi-6, isikhunta siyasuswa, izinto ezingenalutho ziyakhishwa, bese igumbi lokomisa lomiswa. 30-70, amahora ayi-18-20 okususa. 3. Uma ulungisa isikhunta, qala uhlole ukuthi isikhunta siyahlangabezana yini nezidingo zomklamo. Uma uhlangabezana nezidingo, lungisa isikhunta ngokomdwebo. Ngemva kokuhlola, thumela ekamelweni lokomisa elinokushisa okuphezulu.

4. Ngemva kokuba umswakama we-reaction sintering billet usufinyelele ku-1%, yikhiphe, uhlanze i-billet ngomoya ovunguzayo bese uyikala. Engeza izingxenye ezingu-2.9 zensimbi ye-silicon. I-nitrogen ingapompelwa ku-vacuum sintering. Inqubo yokuhlanza ekushiseni okuphansi okungu-700 amahora angu-4; Izinga lokushisa eliphakathi 1400, amahora angu-5; Izinga lokushisa eliphakeme 2200, amahora angu-6. Uma izinga lokushisa lehla amahora angu-12 futhi lifinyelele ku-150, yeka ukusebenza ku-furnace bese uvula i-furnace.

5. Ngemva kokuphuma komkhiqizo wokwelapha nge-sandblasting, i-silicon standard Chartered ebusweni bayo iyagaywa futhi igaywe nge-sandblasting.

6. Inhloso yemikhiqizo yokwelapha i-oxidation ukususa ama-oxide akhiqizwa ngesikhathi senqubo yokusila. Umkhiqizo ushiswa ku-1350 amahora angama-24 esithandweni se-oxidation bese upholiswa ngokwemvelo. Ngemva kokususwa, ufakwa endaweni yokugcina ngokuhlolwa.

Izinto zokusetshenziswa kanye nesilinganiso esamukelwe yindlela yokusungula izinto kungokwesayensi futhi kunengqondo, ukuze indawo engenalutho ibe nokuntuleka okwanele futhi indawo engenalutho ibe nobuningi obungcono; Izinga lokushisa elingcono lokushisisa, izinga lokushisa kanye nesikhathi sokubamba kuqinisekisa amandla aphezulu okugoba komkhiqizo. Ukusebenza okuyinhloko kanye nekhwalithi yemikhiqizo ekhiqizwe yile ndlela sekufinyelele ezingeni eliphakeme lomhlaba wonke.

Okungenhla kuyindlela yokukhiqiza i-silicon carbide e-reactive sintering, uma udinga ulwazi olwengeziwe, sicela ukhululeke ukuxhumana nathi!