1.4 Kukuya kwechipiri
Tsvina inopwanyiwa, yokuyiwa, yosefa kuita zvidimbu zvemakumi kusvika kumazana emamicrometer muhukuru isati yasanganiswa zvakaenzana.Inoshandiswa sechinhu chinotsikirira, chinonzi pressing powder.Midziyo yekukuya yechipiri kazhinji inoshandisa vertical roller mill kana bhora chigayo.
1.5 Kugadzira
Kusiyana neakajairika extrusion uye kuumbwa,isostatic kudzvanya graphiteinoumbwa uchishandisa inotonhora isostatic pressing technology (Mufananidzo 2).Zadza hupfu hwehupfu murubha mold, uye gadzira hupfu kuburikidza nepamusoro-frequency electromagnetic vibration.Mushure mekuisa chisimbiso, tsvaira zvidimbu zvehupfu kuti upedze mweya uri pakati pawo.Iise mumudziyo wakanyanya-kudzvanywa une midhiya yemvura yakaita semvura kana mafuta, tsikirira ku100-200MPa, woidzvanya muchigadzirwa checylindrical kana rectangular.
Sekureva kwaPascal's musimboti, kudzvanywa kunoiswa kune rabha mold kuburikidza nemvura yepakati senge mvura, uye kudzvanywa kwakaenzana munzira dzese.Nenzira iyi, zvimedu zvehupfu hazvina kutungamirwa munzira yekuzadza muforoma, asi inomanikidzwa muhurongwa husina kurongeka.Naizvozvo, kunyangwe graphite iri anisotropic mune crystallographic zvivakwa, zvakazara, iyo isostatic yekudzvanya graphite is isotropic.Zvigadzirwa zvakaumbwa hazvina chete cylindrical uye rectangular maumbirwo, asiwo cylindrical uye crucible maumbirwo.
Iyo isostatic inotsikirira yekuumba muchina inonyanya kushandiswa muindasitiri yehupfu simbi.Nekuda kwekudiwa kwemaindasitiri epamusoro-soro akadai seaerospace, indasitiri yenyukireya, maalloys akaomarara, uye high-voltage electromagnetic, kuvandudzwa kweisostatic pressing tekinoroji kunokurumidza, uye inokwanisa kugadzira michina inotonhora isostatic yekutsikirira ine silinda inoshanda. dhayamita yemukati ye3000mm, kureba kwe5000mm, uye yakanyanya kushanda yekumanikidza ye600MPa.Parizvino, iyo yakanyanya kutaurwa yeinotonhora isostatic yekutsikirira michina inoshandiswa muindasitiri yekabhoni yekugadzira isostatic yekutsikirira graphite ndeye Φ 2150mm × 4700mm, ine yakanyanya kushanda nesimba ye180MPa.
1.6 Kubika
Munguva yekugocha, kemikari yakaomarara inoitika pakati peaggregate uye binder, zvichiita kuti binder iparare uye isunungure huwandu hwakawanda hwechinhu chinoputika, ichiitwawo condensation reaction.Mune yakaderera-tembiricha preheating nhanho, iyo mbishi chigadzirwa chinowedzera nekuda kwekudziya, uye mune inotevera yekudziya maitiro, iyo vhoriyamu inodzikira nekuda kwe condensation reaction.
Iyo yakakura kuwanda kwechigadzirwa chakasvibirira, ndiko kunonyanya kuoma kuburitsa zvinhu zvinoshanduka, uye mukati uye mukati mechigadzirwa chakasvibirira zvinotarisana nekusiyana kwetembiricha, kusaenzana kwekuwedzera kwekupisa uye kuputika, izvo zvinogona kukonzera kutsemuka kwechigadzirwa chakabikwa.
Nekuda kwechimiro chayo chakanaka, isostatic yekutsikirira graphite inoda kunyanya kunonoka kugocha, uye tembiricha mukati mechoto inofanira kunge yakafanana, kunyanya panguva yetembiricha apo asphalt volatiles inokurumidza kuburitswa.Kupisa kunofanirwa kuitwa nekuchenjerera, nehuwandu hwekupisa husingapfuure 1 ℃ / h uye musiyano wekushisa mukati mechoto usingasviki 20 ℃.Iyi nzira inotora inenge 1-2 mwedzi.
1.7 Kuiswa pamuviri
Panguva yekugochwa, nyaya inoputika yetara yemarasha inobviswa.Fine pores inosara muchigadzirwa panguva yekubuda gasi uye vhoriyamu contraction, anenge ese ayo akavhurika pores.
Kuti uvandudze vhoriyamu density, simba remagetsi, conductivity, kupisa kwemafuta, uye makemikari kuramba echigadzirwa, iyo yekumanikidza impregnation nzira inogona kushandiswa, inosanganisira kurovedzera marasha tar pitch mukati mechigadzirwa kuburikidza neakavhurika pores.
Chigadzirwa chacho chinoda kutanga chapiswa, uye chobva chanyungudutswa uye chabviswa mutangi rekupinza.Zvadaro, iyo yakanyungudutswa yemarasha tar asphalt inowedzerwa kune iyo impregnation tangi uye inomanikidzwa kubvumira iyo impregnating agent asphalt kupinda mukati mechigadzirwa.Kazhinji, isostatic kudzvanya graphite inopinda akawanda matenderedzwa e impregnation kugocha.
1.8 Graphitization
Pisa chigadzirwa chakabikwa kusvika pa3000 ℃, ronga lattice yekabhoni maatomu zvine kurongeka, uye pedzisa kushandura kubva kucarbon kuenda kugraphite, inodaidzwa kuti graphitization.
Nzira dze graphitization dzinosanganisira nzira yeAcheson, yemukati yekupisa yakatevedzana yekubatanidza nzira, yakakwira-frequency induction nzira, etc. Iyo yakajairika Acheson process inotora anenge 1-1.5 mwedzi kuti zvigadzirwa zvitakurwe uye zvibudiswe kubva muchoto.Choto chega chega chinogona kubata matani akati wandei kumatani ematani ezvigadzirwa zvakagochwa.
Nguva yekutumira: Sep-29-2023