1.4 Ukugaya kwesibili
I-paste ichotshozwa, inhlabathi, futhi ihlelwe ngezinhlayiya zamashumi kumakhulu ama-micrometers ngosayizi ngaphambi kokuxutshwa ngokulinganayo. Isetshenziswa njengento ecindezelayo, ebizwa nge-Precing Powder. Imishini yokugaya kwesibili ivame ukusebenzisa i-roller roller mill noma isigayo sebhola.
1.5 kwakha
Ngokungafani nokukhishwa okujwayelekile nokubumba,i-graphite ecindezelayo e-isostaticyakheka kusetshenziswa ubuchwepheshe bokucindezela obubandayo obubandayo (Umdwebo 2). Gcwalisa i-powder ebonakalayo ebonakalayo kusikhunta enjoloba, bese ucwengile i-powder ngokusebenzisa ukudlidliza kwe-electromagnecnetic frequency. Ngemuva kokubekwa uphawu uphawu, vula izinhlayiya eziphindwe kampuphu ukuqeda umoya phakathi kwazo. Yibeke esitsheni esiphakeme kakhulu esiqukethe imidiya ewuketshezi efana namanzi noma uwoyela, uyicindezele ku-100-200mpa, bese uyicindezela kumkhiqizo ongaqondakali noma unxande.
Ngokusho komgomo wePascal, ingcindezi isetshenziswa isikhunta enjoloba ngokusebenzisa i-liquid medium efana namanzi, futhi ingcindezi ilingana kuzo zonke izinkomba. Ngale ndlela, izinhlayiya ze-powder azinakuthathwa ekuqondisweni kokugcwaliswa kwesikhunta, kepha zicindezelwe ekuhlelweni okungahambi kahle. Ngakho-ke, yize i-graphite i-anisotropic ezakhiweni zekristavographic, jikelele, i-graphite ecindezelwe e-isostatic yi-isotropic. Imikhiqizo eyenziweyo ayinazo kuphela amajamo we-cylindrical noxande, kodwa futhi namajamo aqondakalayo.
Umshini wokuxhuma wokucindezela okuyisisekelo usetshenziswa ikakhulukazi embonini ye-powder metallurgy. Ngenxa yesidingo sezimboni ezisezingeni eliphakeme njenge-aerospace, imboni yenuzi, i-hard-voys, ukuthuthukiswa kwe-electromatic technom, futhi inamandla okusebenza kwama-cylinder wangaphakathi we-3000mm, futhi ukuphakama kwe-5000mm, kanye nengcindezi yokusebenza ephezulu ye-600MPA ye-600MPA. Njengamanje, imininingwane ephezulu yemishini ecindezelayo ebandayo esetshenziswa embonini yekhabhoni yokukhiqiza i-graphite ecindezelayo e-Isstatic kukhona 2150mm × 4700mm, ngokucindezela okuphezulu komsebenzi we-180MPA.
1.6 Baking
Ngesikhathi senqubo eqhubekayo, ukusabela kwamakhemikhali okuyinkimbinkimbi kwenzeka phakathi kokuhlanganiswa kanye ne-binder, kubangele ukubola nokukhipha inani elikhulu lento eshintshashintshayo, kuyilapho futhi liqhubeka nokuphendula. Esigabeni sokushisa okushisa okuphansi, umkhiqizo ovundwayo uyanda ngenxa yokushisa, futhi kwinqubo elandelayo yokushisa, ivolumu lincipha ngenxa yokusabela kokuvundiswa.
Uma kukhula umthamo womkhiqizo ovundwayo, kunzima kakhulu ukukhipha into eguquguqukayo, futhi ingaphezulu kanye nokungaphakathi komkhiqizo ovuthiwe kuthambekele ekulweni kokushisa komkhiqizo ovundwayo.
Ngenxa yesakhiwo sayo esihle, i-graphite ecindezelwe esostatic idinga inqubo ehamba kancane, futhi izinga lokushisa ngaphakathi kwesithando somlilo kufanele lifane kakhulu, ikakhulukazi ngesikhathi sokushisa ama-asphalt lapho kukhishwa khona ngokushesha. Inqubo yokushisa kufanele yenziwe ngokuqapha, ngesilinganiso sokushisa esingeqi ku-1 ℃ / h kanye nomehluko wokushisa ngaphakathi kwesithando somlilo esingaphansi kwama-20 ℃. Le nqubo ithatha cishe izinyanga ezi-1-2.
1.7 Ukuthunyelwa
Ngesikhathi sokugazingi, udaba oluguquguqukayo lwe-Coal Tar Pitch luyakhishwa. Ama-pores amahle asele emkhiqizweni ngesikhathi sokukhishwa kwegesi kanye nokugculiseka kwevolumu, cishe konke okuvuliwe ama-pores.
Ukuze uthuthukise ubungako bevolumu, amandla emishini, ukuqhutshwa, ukuvumelanisa okushisayo, kanye nokuphikiswa kwamakhemikhali komkhiqizo, indlela yokufaka umfutho, okubandakanya ukufaka i-coal tal pitch ungene ngaphakathi komkhiqizo ngama-pores avulekile.
Umkhiqizo udinga ukushiswa ngaphambi kokuqala, bese uphuma futhi ukhishwe ethangini lokufakwa kabusha. Ngemuva kwalokho, i-asphalt encibilikisiwe yamalahle ye-COAL ingezwe ethangini lokufakwa kabusha bese licindezelwa ukuvumela i-agent ejenti yokufaka i-as asphalt ukufaka ingaphakathi lomkhiqizo. Imvamisa, i-Isstatic Pressing Graphite ithola imijikelezo eminingi yokugcwala kokutholwayo.
1.8 i-graphitization
Shisisa umkhiqizo obhalwe ku-3000 ℃, uhlele ithayela lama-athomu e-carbon ngendlela ehlelekile, bese uqedela ukuguqulwa okuvela kwikhabhoni kuya ku-graphite.
Izindlela zokuqhafaza zifaka indlela ye-acheson, indlela yangaphakathi yochungechunge lwe-armal uchungechunge, indlela yokuhlanza imvamisa ye-armal, njll. Inqubo ejwayelekile ye-Acheson ithatha cishe izinyanga eziyi-1 kuya kwezingu-1 ukuze imikhiqizo ilayishwe futhi ikhishwe esithandweni somlilo futhi ikhishwe esithandweni somlilo. Isithando ngasinye singaphatha amathani amaningana ukuze amathani amathani wemikhiqizo ebilisiwe.
Isikhathi sePosi: Sep-29-2023