Sawubona, bangane!Siyingcwetiabakhiqizi bezingxenye zensimbi eziyimpuphu eChina. Sinokuningii-powder metallurgy sintering yezingxenye. Njengomkhiqizi we-powder metallurgy ngizokutshela ukuthi inqubo ye-sintering in powder metallurgy!
Inqubo ye-Sintering ku-powder metallurgyibhekana nochungechunge lwezinguquko zomzimba namakhemikhali, njengokuhwamuka kwamanzi noma i-organic or volatilization, ukuhlanzwa kwegesi ye-adsorption, ukuqedwa kokucindezeleka, ukuncishiswa kwe-powder surface oxide, ukufuduka kwe-intergranular material, recrystallization kanye nokukhula kokusanhlamvu, ngaleyo ndlela kwenza ukuxhumana kwekristalu phakathi kwezinhlayiya kukhuphuke, i-pore iyancipha noma ivele inyamalale. Lapho isigaba se-liquid sivela, ukuhlakazeka kanye nemvula yesigaba esiqinile nakho kuzokwenzeka. Lezi zinqubo azinayo imingcele ecacile enye nenye, kodwa ziyagqagqana futhi zinomthelela komunye nomunye. Ngaphezu kokunye ukufakwa kwe-metallurgy, ukusabela kwayo yonke imikhiqizo eyenziwe nge-powder metallurgy kuyinkimbinkimbi. Ngo-1942, u-GF Schutig waseJalimane wasebenzisa izindlela zokucwaninga ngokomzimba namakhemikhali ukuze alinganise umthelela wokushisa kwe-sintering kumandla we-electromotive, ukuncibilika, ukuminyana, i-microstructure, izakhiwo zemishini zomzimba we-sintered, futhi wathola ukuthi ukucwilisa kuyinqubo eyinkimbinkimbi kakhulu. Ngo-1949, uGCKuczynski wase-United States wafunda ukucwiliswa kwamabhola ensimbi nezingcwecwe zensimbi futhi wakholelwa ukuthi ukufuduka kwezinto ngesikhathi sokucwiliswa kwenziwa ngokuyinhloko ngokusakazwa. Umsebenzi wabo uphushele isifundo sethiyori ye-sintering esigabeni esisha. Umsebenzi omningi wocwaningo owalandela ugxile endleleni yokufuduka kwezinto ngesikhathi sokucwiliswa.
Ngokuvamile kukholakala ukuthi kunezindlela ezinhlanu zokufuduka kwezinto ngesikhathi sokucwiliswa: ukugeleza kwe-viscous noma ipulasitiki, ukuhwamuka nokufiphala, ukuhlukaniswa kwevolumu, ukuhlukaniswa komngcele wokusanhlamvu, kanye nokusabalalisa kwendawo. Lapho izinhlayiya ezimbili eziyindilinga ezixhumene zisindwa, ukukhula kobubanzi bentamo yokuxhumana X kungase kuhlotshaniswe nesikhathi se-sintering kanje:
Inqubo ye-Sintering I-Sintering kumele yenziwe esithandweni esishisayo esinomoya ovikelayo ukuze kugwenywe i-oxidation ye-sintered body noma ukusabela okubi kwamakhemikhali. Kunezinhlobo eziningi zezithando zokushisa, ezingasetshenziswa njengemithombo yokushisa njengegesi yemvelo, igesi, uwoyela nogesi. Isithando sokushisa sikagesi sinomnotho futhi silula, kulula ukusilungisa nokulawula. Isimo sokuzivikela esivame ukusetshenziswa yi-vacuum, i-argon, i-helium, i-nitrogen, i-carbon dioxide namanye amagesi angenayo ne-hydrogen, ukubola kwe-ammonia, i-carbon monoxide, ukuguqulwa kwegesi yemvelo namanye amagesi anciphisa.
Ukuze kuthuthukiswe ukusebenza kwemikhiqizo e-sintered kanye nosayizi nokunemba komumo, ngokuvamile kudingekile ukwenza ukubunjwa, ukuqeda, ukucindezela, ukucwiliswa kwamafutha, ukucutshungulwa kwemishini, ukwelashwa kokushisa nezinye izinqubo ezilandelayo.
Ukugeleza kwenqubo yokubumba umjovo
Isikhathi sokuthumela: Jul-29-2022