1.4 Ukusila okwesibini
Intlama iyacunyuzwa, icolwe, ihluzwe ibe ngamasuntswana angamashumi ukuya kumakhulu eemicrometers ngobukhulu phambi kokuba ixutywe ngokulinganayo.Isetyenziswa njengento ecinezelayo, ebizwa ngokuba yi-pressing powder.Isixhobo sokugaya okwesibini sisebenzisa ilitye lokusila elithe nkqo okanye ilitye lokusila.
1.5 Ukubumba
Ngokungafaniyo ne-extrusion eqhelekileyo kunye nokubumba,isostatic ecinezela igraphiteyenziwe ngokusebenzisa iteknoloji ebandayo ye-isostatic yokucinezela (Umfanekiso 2).Gcwalisa umgubo wezinto ekrwada kubumba zerabha, kwaye uhlanganise umgubo ngokusebenzisa i-high-frequency electromagnetic vibration.Emva kokutywinwa, cima iincinci ze powder ukukhupha umoya phakathi kwabo.Yibeke kwisitya soxinzelelo oluphezulu oluqulethe imidiya engamanzi njengamanzi okanye ioli, yicinezele kwi-100-200MPa, kwaye uyicinezele kwimveliso ye-cylindrical okanye i-rectangular.
Ngokomgaqo kaPascal, uxinzelelo lusetyenziswa kwi-rubber mold ngokusebenzisa i-medium liquid efana namanzi, kwaye uxinzelelo lulingana kuzo zonke iinkalo.Ngale ndlela, i-powder particles ayijoliswanga kwindlela yokuzalisa kwi-mold, kodwa ixinzelelwe kwilungiselelo elingaqhelekanga.Ke ngoko, nangona igraphite i-anisotropic kwiipropathi zecrystallographic, iyonke, i-isostatic yokucinezela igraphite yi-isotropic.Iimveliso ezenziweyo azinayo nje imilo ye-cylindrical kunye ne-rectangular, kodwa kunye ne-cylindrical and crucible shapes.
Umatshini wokubumba ocinezelayo we-isostatic usetyenziswa ikakhulu kwishishini lesinyithi somgubo.Ngenxa yemfuno yamashishini anesiphelo esiphezulu esinje nge-aerospace, ishishini lenyukliya, ii-alloys ezinzima, kunye ne-high-voltage electromagnetic, uphuhliso lwetekhnoloji yokucinezela i-isostatic lukhawuleza kakhulu, kwaye lunamandla okwenza oomatshini bokucinezela be-isostatic ababandayo ngesilinda esisebenzayo. I-diameter yangaphakathi ye-3000mm, ukuphakama kwe-5000mm, kunye noxinzelelo oluphezulu lwe-600MPa.Okwangoku, ubuninzi beenkcazo zoomatshini ababandayo be-isostatic abasetyenziswa kwishishini lekhabhoni ukuvelisa i-isostatic pressing graphite yi-Φ 2150mm × 4700mm, kunye noxinzelelo oluphezulu lokusebenza lwe-180MPa.
1.6 Ukubhaka
Ngethuba lenkqubo yokutshisa, ukusabela kweekhemikhali eziyinkimbinkimbi kwenzeka phakathi kwe-aggregate kunye ne-binder, kubangela ukuba i-binder ibole kwaye ikhulule ubuninzi bezinto eziguquguqukayo, ngelixa liphinde liqhube ukusabela kwe-condensation.Kwinqanaba eliphantsi lobushushu bokushisa, imveliso eluhlaza iyanda ngenxa yokufudumeza, kwaye kwinkqubo yokufudumeza elandelayo, umthamo uyancipha ngenxa yokusabela kwe-condensation.
Okukhona umthamo omkhulu wemveliso ekrwada, kokukhona kunzima ukukhulula izinto eziguquguqukayo, kwaye umphezulu kunye nangaphakathi kwimveliso ekrwada ziqhelene nokwahluka kobushushu, ukwandiswa kobushushu obungalinganiyo kunye nokucutheka, okunokukhokelela kwiintanda kwimveliso ekrwada.
Ngenxa yesakhiwo sayo esihle, i-isostatic icinezela igraphite ifuna inkqubo yokuqhola ngokuthe ngcembe, kwaye ubushushu ngaphakathi kwiziko kufuneka bufane kakhulu, ngakumbi ngexesha lobushushu apho i-asphalt volatiles ikhutshwa ngokukhawuleza.Inkqubo yokufudumala kufuneka iqhutywe ngokuqaphela, kunye nezinga lokushisa elingadluli kwi-1 ℃ / h kunye nokwahlukana kweqondo lokushisa ngaphakathi kwesithando somlilo esingaphantsi kwe-20 ℃.Le nkqubo ithatha malunga neenyanga ezi-1-2.
1.7 Ukukhulelwa
Ngexesha lokugcadwa, into eguquguqukayo yetela yamalahle iyakhutshwa.Iipores ezintle zishiywe kwimveliso ngexesha lokukhutshwa kwegesi kunye nokunciphisa umthamo, phantse zonke ezi zivulekileyo.
Ukuze kuphuculwe ukuxinana kwevolumu, amandla omatshini, ukuhanjiswa kwe-thermal, kunye nokumelana nemichiza yemveliso, indlela yokufakwa koxinzelelo ingasetyenziswa, ebandakanya ukumilisela i-tar yelahle ngaphakathi kwemveliso ngokusebenzisa iipores ezivulekileyo.
Imveliso idinga ukufudumeza kuqala, kwaye emva koko ikhutshwe kwaye ikhutshwe kwi-tank yokufakela.Emva koko, i-asphalt yamalahle enyibilikisiweyo yongezwa kwi-tank yokufakelwa kwaye icinezele ukuvumela i-asphalt ye-agent ekhulelwe ukuba ingene ngaphakathi kwimveliso.Ngokwesiqhelo, i-isostatic yokucinezela igraphite ingena kwimijikelo emininzi yokuqhotsa.
1.8 Ukuzoba
Fudumeza imveliso epholileyo ukuya malunga ne-3000 ℃, cwangcisa iletisi yeeathom zekhabhoni ngocwangco, kwaye ugqibezele inguqu ukusuka kwikhabhoni ukuya kwigraphite, ebizwa ngokuba yigraphitization.
Iindlela ze-graphitization ziquka indlela ye-Acheson, indlela yokudibanisa i-thermal series, i-high-frequency induction method, njl. Inkqubo ye-Acheson eqhelekileyo ithatha malunga neenyanga ezi-1-1.5 ukwenzela ukuba iimveliso zilayishwe kwaye zikhutshwe kwisithando somlilo.Iziko ngalinye linokuphatha iitoni ezininzi ukuya kwiitoni zeetoni zeemveliso ezigcadiweyo.
Ixesha lokuposa: Sep-29-2023