Indlela yokuvelisa i-reactive sintering silicon carbide

I-Reaction-sintered silicon carbide luhlobo olutsha lweeseramikhi zobugcisa obuphezulu, olunamandla aphezulu, ubulukhuni obuphezulu, ukumelana nokuguguleka okuhle kunye nokumelana nokugqwala, kwaye lusetyenziswa kakhulu kwi-metallurgy, i-petrochemical, i-elektroniki, i-aerospace kunye neminye imimandla. Imveliso ene-silicon carbide abrasive assistant carbon black, i-graphite kunye nezinye izongezo ezahlukeneyo, kusetyenziswa iindlela zokucinezela ezomileyo, i-extrusion okanye ukuthulula ukwenza umgangatho onomoya, emva koko kulandelayo kunye ukuqonda indlela yemveliso ye-reactive sintering silicon carbide!

I-silicon carbide ekhupha i-reactive sintering Le mveliso yinkqubo yobugcisa evuthiweyo emva kwamawaka eemvavanyo ezenziwe ngumvelisi kangangeminyaka emininzi ukukhuthaza ifomula yezinto eziluhlaza kunye nenkqubo yemveliso, ingakumbi inkqubo ekhethekileyo yokukhupha i-sintering eqhubekayo.

Kwibango 1 lovumbululo, iqhezu lobunzima bomgubo we-silicon carbide liziinxalenye ezi-5 ~ 8, umnyama we-carbon ungama-0.5-1.5, i-graphite ingama-1-1.5, kwaye i-binder ingama-0.1-0.5. Phakathi kwazo, ubungakanani begrain gradient ye-silicon carbide yi-sic(90-30m)3-5, sic)30-0.8m)2-3. I-methyl cellulose kunye ne-PVA powder ye-gazelle zifakwe kumanzi afanelekileyo angama-0.1-0.5 ngokulandelelana, kwaye isisombululo esicacileyo sifunyenwe emva kokufudumeza.

1. Xuba zonke iintlobo zeempuphu, izincamathelisi kunye nezicombululo ezilungiselelwe ngokwefomula uze uxube kakuhle.

2, hlamba i-casting mold vacuum, ufikelele kwi-0.1Mpa, ufake i-slurry exutyiweyo ngoxinzelelo. Emva kwexesha elithile, i-slurry iyakhululwa kwaye isithuba esingenanto siyasuswa. Gcina kwi-30-70 iiyure ezili-18-20 ukuze yome.

3. Sika i-billet ngokweemfuno zomzobo.

4, faka i-reaction sintering billet kwisithando somlilo, yongeza ubunzima be-1-3 yeenxalenye ze-silicon yesinyithi, i-vacuum sintering. Le nkqubo yahlulwe yaba ngamaqondo obushushu aphantsi 0-700, igcinwe iiyure ezi-3-5; Ubushushu obuphakathi 700-1400, yigcine iiyure ezi-4-6; Gcina kumaqondo obushushu aphezulu 1400-2200 iiyure ezi-5-7. Yehlisa ubushushu obungaphantsi kwe-150, yima isithando somlilo uze uvule isithando somlilo.

5, imveliso yokusila yokuqhumisa isanti, umphezulu wesilicon slag, kunye nokusila kokuqhumisa isanti.

6, iimveliso zonyango lwe-oxidation zifakwe kwi-oxidation oven, iiyure ezingama-24 ukuya kwi-1350, ukupholisa kwendalo. Zikhuphe, zijonge kwaye uzibeke kwindawo yokugcina.

Izinto ezisetyenzisiweyo kunye nomlinganiselo owamkelweyo yindlela yokuvelisa izinto zingokwenzululwazi kwaye zifanelekile, ukuze isithuba esingenanto sibe nendawo eyaneleyo kwaye isithuba esingenanto sibe noxinano olungcono; Izinga elingcono lokufudumeza, ubushushu kunye nexesha lokubamba liqinisekisa amandla aphezulu okugoba kwemveliso. Ukusebenza okuphambili kunye nomgangatho wale ndlela kufikelele kwinqanaba eliphezulu lamazwe ngamazwe. Izalathisi zayo eziphambili zezi zilandelayo

Ukuphunyezwa kwe-silicon carbide ethile ye-reaction sintering

Indlela yokwenziwa kweebhanti ze-silicon carbide ezifakwe kwi-reaction-sintered:

1, xa izinto zokwenza iglue zithatha ubunzima beenxalenye eziyi-0.3, yongeza amanzi aneleyo ngokulinganayo, umxube we-silicon carbide powder obunzima obuziinxalenye eziyi-6.8 (ubukhulu beenxalenye eziyi-90-30m, iinxalenye eziyi-3.8m, iinxalenye eziyi-30-0.8m), i-carbon black, inxenye eyi-1, emnyama.

2. Xa ugalela, qala ngokucoca isikhunta esisetyenzisiweyo, ulungelelanise isikhunta, usilungise ngeefasteners, ukhuphe isikhunta etankini ngoxinzelelo, uzalise itanki nge-nitrogen yoxinzelelo lwe-0.1Mpa, uthulule ngoxinzelelo, uze utyhale isikhunta kwisikhunta. Emva kokufikelela kwiyure e-1, isikhunta siyakhululwa, kwaye emva kweeyure ezi-6, isikhunta siyasuswa, izinto ezingenanto ziyakhutshwa, kwaye igumbi lokomisa lome. 30-70, iiyure ezili-18-20 zokususa. 3. Xa ulungisa isikhunta, qala ngokukhangela ukuba isikhunta siyahlangabezana na neemfuno zoyilo. Xa uhlangabezana neemfuno, lungisa isikhunta ngokomzobo. Emva kokuhlola, thumela kwigumbi lokomisa elinobushushu obuphezulu.

4. Emva kokuba umswakama we-reaction sintering billet ufikelele kwi-1%, yikhuphe, ucoce i-billet ngomoya ovuthuzayo uze uyilinganise. Yongeza iinxalenye ze-silicon metal eziyi-2.9. I-nitrogen ingapompelwa kwi-vacuum sintering. Inkqubo yokucoca kubushushu obuphantsi obuyi-700 iiyure ezi-4; Ubushushu obuphakathi yi-1400, iiyure ezi-5; Ubushushu obuphezulu yi-2200, iiyure ezi-6. Xa ubushushu buhla iiyure ezili-12 bufikelele kwi-150, yeka ukusebenza kwi-oven uze uvule i-oven.

5. Emva kokuba imveliso yonyango lwesanti iphumile, i-silicon standard Chartered kumphezulu wayo iyagaywa ize igaywe ngesanti.

6. Injongo yeemveliso zonyango lwe-oxidation kukususa ii-oxides ezenziwe ngexesha lenkqubo yokusila. Imveliso itshiswa ukuya kwi-1350 iiyure ezingama-24 kwi-oxidation furnace ize ipholiswe ngokwendalo. Emva kokususwa, ifakwa kwindawo yokugcina ngokuhlolwa.

Izinto ezisetyenzisiweyo kunye nomlinganiselo owamkelweyo yindlela yokuvelisa izinto zingokwenzululwazi kwaye zifanelekile, ukuze isithuba esingenanto sibe nendawo eyaneleyo kwaye isithuba esingenanto sibe noxinano olungcono; Izinga elingcono lokufudumeza, ubushushu kunye nexesha lokubamba liqinisekisa amandla aphezulu okugoba kwemveliso. Ukusebenza okuphambili kunye nomgangatho weemveliso eziveliswe yile ndlela zifikelele kwinqanaba eliphezulu lamazwe ngamazwe.

Le ingentla yindlela yokuvelisa i-reactive sintering silicon carbide, ukuba ufuna ulwazi oluthe kratya, nceda unxibelelane nathi!