Indlela yokuvelisa ye-reactive sintering silicon carbide

I-Reaction-sintered silicon carbide luhlobo olutsha lweeseramikhi zodidi oluphezulu, ezinokuqina okuphezulu, ukuqina okuphezulu, ukumelana nokunxiba kakuhle kunye nokumelana nokubola, kwaye isetyenziswa kakhulu kwi-metallurgy, petrochemical, electronics, aerospace kunye nezinye iinkalo. Imveliso kunye ne-silicon carbide abrasive axiliary carbon black, igraphite kunye nezongezelelo ezahlukeneyo, usebenzisa i-dry pressing, extrusion okanye iindlela zokugalela ukwenza umgangatho we-porous, emva koko kulandelayo kunye ukuqonda indlela yokuvelisa i-silicon carbide esebenzayo!

I-reactive sintering silicon carbide Ukuveliswa yinkqubo yobugcisa esele ikhulile ngokwentelekiso emva kwamawaka eemvavanyo ezenziwe ngumqambi iminyaka emininzi ukukhuthaza ifomyula yemathiriyeli ekrwada kunye nenkqubo yokuvelisa, ngakumbi inkqubo eyodwa eqhubekayo yokucofa.

Kwibango le-1 ye-invention, i-fraction ye-silicon carbide powder yi-5 ~ 8 iinxalenye, i-carbon black yi-0.5-1.5 iinxalenye, i-graphite yi-1-1.5 inxalenye, kunye ne-binder yi-0.1-0.5. Phakathi kwabo, ubungakanani beengqolowa ze-silicon carbide yi-sic (90-30m) 3-5 iinxalenye, i-sic) 30-0.8m) 2-3 iinxalenye. I-methyl cellulose kunye ne-PVA powder ye-gazelle ifakwe kwisixa esifanelekileyo samanzi i-0.1-0.5 inxalenye ngokulandelanayo, kwaye isisombululo esicacileyo sifunyenwe emva kokufudumeza.

1. Hlanganisa zonke iintlobo ze powders, i-adhesives kunye nezisombululo ezilungiselelwe ngokwefomula kwaye ugxobhoze kakuhle.

2, coca i-vacuum yokubumba yokuphosa, ukufikelela kwi-0.1Mpa, inaliti yoxinzelelo lwe-slurry edibeneyo. Emva kwexesha elithile, i-slurry iyakhululwa kwaye i-blank ikhutshwe. Gcina kwi-30-70 kwiiyure ze-18-20 zokomisa.

3. Nciphisa i-billet ngokweemfuno zomzobo.

4, faka i-reaction sintering billet kwisithando somlilo, yongeza ubunzima beengxenye ezi-1-3 ze-silicon yesinyithi, i-vacuum sintering. Inkqubo ihlukaniswe kwiqondo lokushisa eliphantsi 0-700, ligcinwe iiyure ezingama-3-5; Ubushushu obuphakathi 700-1400, gcina iiyure ezingama-4-6; Gcina kwiqondo lokushisa eliphezulu 1400-2200 iiyure 5-7. Yehlisa iqondo lokushisa ngaphantsi kwe-150 yeka isithando somlilo kwaye uvule isithando somlilo.

I-5, unyango lokuqhushumba kwesanti yokusila imveliso ye-silicon slag, kunye nokusila kwesanti.

6, iimveliso zonyango lwe-oxidation kwiziko le-oxidation, iiyure ezingama-24 ukuya kwi-1350, ukupholisa kwendalo. Phuma, jonga kwaye ubeke kwindawo yokugcina.

Izinto ezisetyenziswa ekrwada kunye nomlinganiselo owamkelwe yindlela yokuyila yezenzululwazi kwaye inengqiqo, ukuze into engenanto ibe ne-voidage eyaneleyo kwaye i-blank inoxinano olungcono; Izinga lokufudumala elingcono le-sintering, ubushushu kunye nexesha lokubamba liqinisekisa amandla okugoba aphezulu emveliso. Umsebenzi ophambili kunye nomgangatho wale ndlela ufikelele kwinqanaba eliphezulu lamazwe ngamazwe. Izalathi zayo eziphambili zezi zilandelayo

Reaction sintering silicon carbide uphunyezo oluthile

Embodiment 1 Indlela yokuvelisa iinyanda zesilicon carbide reaction-sintered:

1, izinto ekrwada ukuthatha ubunzima ancamatheleyo 0.3 iinxalenye, yongeza umlinganiselo othile wamanzi ngokulinganayo isiyaluyalu, ubunzima 6.8 iinxalenye silicon carbide umgubo (isuntswana ubukhulu 90-30m 3.8 iinxalenye, 30-0.8m 3 iinxalenye) , ikhabhoni emnyama inxalenye e-1, emnyama

2. Xa ugalela, qala ucoce i-mold esetyenzisiweyo, ulungelelanise i-mold, uyilungise ngee-fasteners, udwebe i-slurry ngaphandle kwetanki ngoxinzelelo, ugcwalise itanki nge-0.1Mpa yoxinzelelo lwe-nitrogen, wenze ukugalela uxinzelelo, kwaye utyhale i-slurry kwi-mold. . Emva kokufikelela kwiyure eli-1, i-slurry ikhutshwe, kwaye emva kweeyure ezingama-6, isikhunta siyasuswa, izinto ezingenanto zikhutshwe, kwaye igumbi lokumisa lomile. 30-70, 18-20 iiyure ukususa. 3. Xa ulungisa indawo engenanto, qala ujonge ukuba ngaba isithuba esingenanto siyahlangabezana neemfuno zoyilo. Xa uhlangabezana neemfuno, lungisa indawo engenanto ngokomzobo. Emva kokuhlolwa, thumela kwindawo yokomisa ukushisa okuphezulu.

4. Emva kokuba umswakama we-reaction sintering billet ufikelele kwi-1%, yikhuphe, uhlambulule i-billet ngomoya ovuthelayo kwaye ulinganise. Yongeza iinxalenye ze-2.9 zensimbi ye-silicon. I-nitrogen inokumpontshelwa kwi-vacuum sintering. Inkqubo ye-Sintering kwi-700 ukushisa okuphantsi kweeyure ze-4; Ubushushu obuphakathi 1400, iiyure ezi-5; Ubushushu obuphezulu 2200,6 iiyure. Xa izinga lokushisa lehla iiyure ezili-12 kwaye lifikelela kwi-150, yeka ukusebenza kwisithando somlilo kwaye uvule isithando somlilo.

5. Emva kokuba imveliso yonyango ye-sandblasting iphuma, umgangatho we-silicon i-Chartered kumphezulu wayo uphantsi kwaye ugaywe nge-sandblasting.

6. Injongo yeemveliso zonyango lwe-oxidation kukususa i-oxides eyenziwa ngexesha lenkqubo ye-sintering. Imveliso ifudunyezwa kwi-1350 kwiiyure ze-24 kwisithando somlilo se-oxidation kwaye ipholile ngokwemvelo. Emva kokususwa, ifakwe kwindawo yokugcina ngokuhlolwa.

Izinto ezisetyenziswa ekrwada kunye nomlinganiselo owamkelwe yindlela yokuyila yezenzululwazi kwaye inengqiqo, ukuze into engenanto ibe ne-voidage eyaneleyo kwaye i-blank inoxinano olungcono; Izinga lokufudumala elingcono le-sintering, ubushushu kunye nexesha lokubamba liqinisekisa amandla okugoba aphezulu emveliso. Ukusebenza okuphambili kunye nomgangatho weemveliso eziveliswa yile ndlela zifikelele kwinqanaba eliphezulu lamazwe ngamazwe.

Oku ngasentla yindlela yokuvelisa ye-reactive sintering silicon carbide, ukuba ufuna ulwazi oluthe kratya, nceda uzive ukhululekile ukuqhagamshelana nathi!