Indima Yobuchwepheshe Bukugcwalisa Emshiseni Nenkinga Yekhisikalo Yokugcina

Indlela engaphambilini yokhokha kwezinxenye kanye nobungozi buphatha umshiso wemshiselweni

Indlela lezinxenye zihlanganisa kumixholo ye-diamond ne-metal ihluka kakhulu kusambatha nokhula kwamandla xa kusinterwa. Xa izinxenzele azihlanganisi ngendlela efanelekileyo, zishiya izinkumbulo ezincane zomkhawulo okungaphakade okuthintela ukusambatha ngendlela efanele. Ngokuphambene, ukufinyelela kwe-green density okuhle kusho konke kushaya ngendlela efanayo njengoba lezi zimboni ziqala ukwenza umculo wabo. Imibhalo ikhombisa ukuthi ukutshintshwa okuncane kwe-green density ngaphezu kwe-5% noma phansi kwe-5% kungahola kakhulu emakhishini akugcina, phakathi kwe-20 kuya ku-30 iphesenti ngokwesayensi ekhipheliwe ngoPasinga. Okuqhubeka lapha esikhathini esibalulekile sibangela wonke into yokuthi izigaba ze-diamond ziyaluhle kanjani kumetali. Futhi lokhu kuhlukaniswa kuyasiza ukuthi izigaba zihambe kanjani emazulwini aphambene aphambene apho ukukhathazeka kwe-wear kubalulekile kakhulu.

Ukuhlanjulwa kwezixhenxe njengokoqobo lwamandla we-mechanical namandla wokudala

Ukuthola ukuqina okuluhlaza okulungile kubaluleke kakhulu uma sifuna lezo zingxenye ezihlanganisiwe zifinyelele cishe kumaphesenti angu-85 kuya kwangu-95 okuqina kwazo okukhulu okungokombono. Lapho abakhiqizi becindezela izinto ngokucophelela, empeleni banciphisa izikhwama ezincane zomoya ezisele lapho amadayimane ehlangana khona nezinto ezihlanganisa izinto - lezi empeleni ziyizixhumanisi ezibuthakathaka kakhulu kumathuluzi afana namabhodi okubhuloga edwaleni. Bheka ngale ndlela: izingxenye ezicindezelwe zibe okungenani amaphesenti angu-72 okuqina okuluhlaza zingakwazi ukubhekana nokucindezeleka okungamaphesenti angu-40 ngaphambi kokuhlukana kunezingxenye ezingagcwele kangako ngokusho kocwaningo olushicilelwe kuyi-Tribology International ngonyaka odlule. Isizathu? Izinto eziqinile azinazo izindawo eziningi lapho kungaqala khona ukwakheka imifantu emincane ngaphakathi kwesakhiwo esincane.

Umthelela wokuqina okuluhlaza ku-deformation ye-segment nokuzinza kokuma

Xa umkhawulo ohlamvu akuyona yisikhathi kuyo yonke indawo, kusenza kube khona ukugaya kwemithombo esintweni sokushisa okungaba yinkinga ekhulu kakhulu, ngaphandle kwe-0.3 mm ngamunye umm kabuhlungu kakhulu. Izinxobo ezinezindawo ezingaphansi kwe-68% zomkhawulo zishisa ngokushesha kunazo eziningi, okuthinta isimo sabo futhi kwenza ukuthatha kakhulu emva kokushisa. Okulungile kukhona ukuthi izixhobo zakhiwo zamandla manje zizondla izinguquko zomkhawulo ngaphezu kanye nge-1.5%. Ngokwesivikelo sokuqasha izakhiwo ngoYerilasi, lokhu kususa ukusebenzisa izixhobo emva kokushisa ngama-22%. Kuzinsimbi zezinkuni zezinkuni, ukugcina ubude obufanayo buhluke kakhulu ngoba lezi zixhobo zidinga iindlebe ezingumayini zibe ngaphakathi kwamayini ukuze zenzeke kahle.

Izindlela Zokwanda Kwemikhawulo Ngexesha Lokucopheka Izingxenye Ezihlanganisiweyo Ne-Diamond

Ukubuyisela Kwamathambo, Ukuphoswa, Ne-Plastic Deformation Ngosizo Lwesimilo

Inkqubela yokuqina iqala ngokwamathuba amathathu okungcono ekwenza ngokuyintsonkothileyo: xa izinto zihamba, xa ikrayini zivaleka, kanti xa izinto ziyaphazanyiswa ngendlela eqina. Xa isiphazamo sibe ngaphansi kuka-300 MPa, lezi zinkinga zeziphaphu ziqinile zizodwa ukugcweba emacaleni phakathi kwezinkuni zediamond, okwenza konke kube nempahla ngaproximately kusuka ku-18 kuze kube ngu-22 iphesenti njengoko kuchazwe ezinyangeni ekuqalileyo. Kodwa uma sizungezile kule bhomdaba ya-400 MPa, into engahambanga khona ivela. Ikrayini ze diamond ziqaqa futhi zishintshelwe kusuka kumehluko wokuphela kuka-120 micrometers kuze kube ngu-80 micrometers kuphela. Ngakoke, izimoto njenge cobalt ziqaqisa ukulayezela ngendlela eqina eyayisabela konke amagugu esemunye, okwenza ukuba kube nenhlaka ephephile kakhulu kumfanekiso ophelile.

Ukuthuthukwa Kwesimo Sokuchaza Kusukela Kwi-Green State Kuya KuSintered Microstructure

Umgodi wokugcina oqondile uqhele iziphumo zokusinda: izigaba ezicinisiwe ku-85% wezilinganiso zomgodi ziyafinyelela ku-98% omgodi wesiphetho, ngaphandle kuka-78% kwaleyo ezaqala ku-70%. Ukuxhasana kwegcobo ekufanelekile kumumele ukuthutha okuhle kwesivimba phakathi kwesikhathi sokushisa. I-coefficient ye-correlation ye-0.95 phakathi komgodi wokugcina nomgodi wokugcina (Ponemon 2023) ubonisa ubukhona bomthwalo wokucindezela.

Ukuguquka Kwesimo Sokuphazanyiswa Ngemva Kocindezelwano Nge-Pressure Ephezulu Ngesikhathi Esiphakeme

Ku-600-900°C, amaporo esidlule ayaphazanyiswa ngokuthutha kwesambatha esivimbi, ukuguquka kwesimo, ukubuyiselwa futhi nokudweba chemically emkhawulweni we-diamond-nge-metal. Amaphressha aphezu kuka-500 MPa nesikhathi esiphezulu kunesi-750°C aphazanyisa isimo sokuphazanyiswa ku-<2 vol%, ngaphandle kuka-8-12% emthondweni wasezindabeni. Ucindezelwano lwe-HPHT (High-Pressure, High-Temperature) lukhula izigaba ze-diamond ezingeneyo engcono yisikhathi eside se-40% emathulwini yokugayaza.

Ukufinyelela Ekupaketheni Okulinganayo Kwegcobo Nokufinyelela Umfanekiso Oyisisekelo Womgodi

Ukuzimiswa kwehlabathi Liphakathi kwezidinga neNgcobo yeBinder kuleGciniso lePacking

Ukusebenzisa isihluko sezidinga ezahlukene sizange kube yilapho esibekela igcinelela ngaphezu kuka-12 kuze kube ngu-18 iphesenti kunalapho zonke izidinga zilingana (Advanced Materials Processing yayilithola lokhu ngo-2023). Yini um причина? Izidinga eziphansi zifaka emaphandleni phakathi kwezingqondo ezinkulu. Uma kunezinkinga eziningi kakhulu kwengcobo, ngaphezu kuka-8 iphesenti ngeyoni, kusabalala ukuthi izinkinga zingatholakali futhi kuhlinza amaphakathi okuqeda kwezindleko. Ngokuphambene, uma ingcobo iphansi kuka-5%, sithola izinkinga ekwakhiweni kwekhanda ephumelelayo. Kukhona ukubalwa kwezinkinga kungcono njengoko kunciphisa amagugu angu-78% noma kangako, okuyisidingo ekunakekelweni komfanekiso wokugcina ungakhohlwa emva kokusinda.

Ukulungiswa kwezinkinga Zokushisa kwiTekiniki yoShishini naseYisekile

Izinqakamba zokuphatha inkqubo ukuze kwehliswe izimo ezimbi njengekuphuluka kanye nokutholakala kwezikhala

Ukubeka isimo esivamile kwegolide sokugcwalisa kubona izinguquko ezingaphansi kwe-0.5% zebunzima ngelixa kugcwaliswa, kungavalela ukulungisa okuzenzekelayo kwezinkinga. Ukushaziya kanye nokubheka ngomkhosi-wethu ophezulu kubona izikhala ezincane ezingaphezulu kwe-50 μm, kungavalela ukuphazanyiswa kabusha ngaphambi kokusinda. Lezi zinqakamba zibeka izindleko zokudweba ngokungahambelani nge-34% ekunzululweni okuphakeme (Ibhali likaManya, 2024).

Ukulungiswa kweyindustri kanye nezinhloso ezibonakala kubunzima bokugcwalisa

Isibonelo: Ukuphila Kwemfazo Ngokungabi nje kwezilingo ezingaphansi kakhulu noma ezingahlukangela

Ngokwesiviko esiphoswayo ngu-ASTM International ukugcina, kuphawula ukuthi malunga ne-40 iphasenthi yezinkinga ngamasegment athile angaphakathi ngexesha lokucutshwa kwenhlangothi kusuke kusuka kuzilingo ezingahlukangela xa kuchithwa izinto. Uma iziqhamo ezithile zombhalo azizange zifinyelele izilingo ephansi kuka-3.2 grams per cubic centimeter, amacala amancane acacisa ukuthi aqale ukudalwa uma kuthembeka umthubi. Ngelishwa, iziqhamo ezichithwe kakhulu kangaka phezu kuka-3.8 grams per cubic centimeter zenzela ukuthi zilungele indiza yezimboni zokudluliswa phakathi kwesiseko. Isibonelo esihlelo kuselulekile kumntu eJamani owawuthola indlela yokunciphisa amasegment apholile ngaphezu kuka-66 iphasenthi emva kokuthatha izinyanga ezimbalwa ekulungiseni indlela abayinxenxa ngamandla amahlanu ahlanuka ayambalwa khona. Isinqumo sakhe sabekhona kuphela ukuthi sithintele konke kuchithwe ngendlela efanayo kuyo yonke into.

Ukulandela Okwamanje Nokubuyisela Izinkumbulo Zokulandela Izilingo Kwezimali Ezenziwa

Izimboni zezinsuku zimanje ziyenzelwe ngamaphrojekthi abalulekile okuhlanganisa izinhlelo zokudala kageseni nge-AI ezakhela imithombo ephethilwe yokungako kwe-densithi ngokuphawuliwa kwe-gram 0.1 ngasilinganiso se-centimeter esikubonke. Lezi zinhlelo zinezinhlelo eziphakeme futhi. Ngesikhathi singaba khona ukukhohlwa okuphambene nokwesivumelwano sika-ISO 27971:2022, zihlengene ngokuzenzakalelayo iziseto zod pressure. Lokhu kuboniswe ukuthi kususa izincazelo ezivame ukuba yizinkinga zokungako kwezimali phakathi kwe-18 kuze kube ngu-22 phesenti ngemva kokunyuka kwezimali. Izivikelo ezithile zombuso zibonisa ukuthi ukubuka ngokusheshayo kubona izinkinga ezingashadzeki zokungako kwezimali ngokuguqulwa kwesayizi yesayithi ekhishwa ngama-5 kuze kube ngu-10 micrometers ngaphambi kokuba ukunyusa kusisiwe.

Ukuthuthuka kwe-Sintering ePhakeme kwe-Pressure, ePhakeme kwe-Temperature ye-Diamond Micro-Powder

Iindlela ezintsha zokugcwalisa phakathi kwezulu eliphakade nezulu (HPHT) ziya kufumana iziphumo ezihle ngokuchitha okanye kude kube 98.5% yodidi lwesilinganiso. Lokhu kuyinto ebalulekileyo ngokungaphezu kuka 25% kunoko kufezekayo ngendlela yokusinda esisiseko. Ukuqinisekiswa kula manyano kukhuthazwa ngokusebenzisa iipresi eziphezulu kude kube 7 gigapascals kunye nezulu ezimbi kude kube 1450 degrees Celsius ngexesha elifutshane lokwakha. Inxaxheba yomdla kukuba inyaniso ibandakanya ingcinga enkulu ekwakhiweni - ii-pools zabandela ezingavumelekanga xa kusebenziswa ngeempowda zediamond eziphezulu ngaphantsi kuka-5 micrometers. Isifundo esiphuculwe ngo-2024 eJournal of Materials Science sabonisa into ethembekileyo. Xa kuchazwa kwizixhobo zokugquma egolide, izixhobo ezinzululwayo ngendlela entsha zange zibaleke kude kube imini engama-300 ngaphaya kabangaphambili kuzo zonke izixhobo eziphathwayo.

Imibuzo Evame Ukubuzwa

Uyintoni udensithi oluhlaza kusinda?

Ubunzima obugcwele buhlekisa ubunzima obukhazimulayo kumongo wamandla kabusha ngaphambi kokuthi kube yisinteri. Kuyindlela yokubala ukuthi izinxobo zikuphi ngaphambi kokuthatha umthwalo, okusabalalisa ubunzima bokugcina nokukhazimula kwesithunzi.

Kungani ubunzima obugcwele bubalulekile ekwenzeni izixhobo zokugcina diamoni?

Ubunzima obugcwele bubaluleke kakhulu ngoba busabalalisa ubukhokho bekugcina, ubungozi, nokukhazimula komgwa wezinto ezisinteriwe njengezixhobo zokugcina diamoni. Ukufinyelela ubunzima obugcwele obujwayelekile kusiza ukuthi le zixhobo zibe nzuzo neziphumelelayo.

Ziziphi iindlela eziphambili zokufinyelela ubunzima obugcwele obuhle?

Iindlela eziphambili kufumana ukwahlulwa kwebhloko, ukulungisa ubungozi bebinda, nokusebenzisa indlela ephindwe kabini okanye indlela eqinisekileyo yokucinezela ukuze kufinyelelwe ukugcina okujwayelekile nobunzima obugcwele.

Ukutheni okuphakade nokucindezelwa kusenzela ubunzima obugcwele?

Ukunxuswa nokugcinwa kwezinto kubaluleke kakhulu emthethweni wokugcina nokusinda njengoba kuthinta ukulungiswa, ukwahluka, nokuguquka kwemipu. Ukunxuswa nokugcinwa okuphezulu kusiza ekukhuliseni kokungabi naniporosi nokufinyelela amadensithi aphezulu.