Uma usakaza indlu yephampu ye-cobalt alloy yesevisi ye-hydraulic enomfutho ophezulu—noma umlomo wombhobho we-AMS 5387 okufanele uphile ku-650°C kanye nengcindezi yomjikelezo oshisayo—umongo we-ceramic awuyona nje ingxenye yesikhunta esilahlwayo. Iwumakhi othule wejiyomethri yangaphakathi, isiqiniseko sokulawula ukujiya kodonga, umugqa wokuqala wokuzivikela ngokumelene nokukhukhuleka kobukhulu ekutshalweni kwezimali. Kwa-QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD., sibone ama-ceramic cores ehluleka ukuthelwa phakathi nesikhathi ku-T800-based impeller shrouds—hhayi ngenxa yokukhathala okungekuhle kwe-binder, kodwa ngenxa yokuthi i-coefficient yokungezwani kwe-thermal (CTE) negobolondo ayizange iqinisekiswe kuyo yonke irempu engu-25°C110 ephelele. Yingakho "umgogodla we-ceramic wemboni yokutshala imali" kungelona igama lokusesha kithi. Ukucaciswa okunembayo okunemiphumela yomhlaba wangempela.
Senza ama-ceramic cores angaphezu kuka-12,000 ngonyaka—ngalinye lenzelwe uhlelo oluthile lwengxubevange, idizayini yokufaka isango, kanye nemvilophu yokusakazwa kwangemuva. Ama-cores ethu ajwayelekile asebenzisa inhlanganisela ye-silica-alumina ehlanganisiwe nama-CTE ashunwe ku-±0.2 × 10⁻⁶/°C ngokumelene nama-alloys e-CoCr; ukwakheka ngokwezifiso kufaka okuhlukile okuqiniswe i-zirconia kokungu>1200°C wesivivinyo se-titanium aluminide. Ngokungafani nama-cores angekho eshalofini athengiswa abahlinzeki abavamile abaphikisayo, okwethu kuthola ukuqinisekiswa okuthathu okungaxoxiswana ngakho ngaphambi kokukhululwa: Ukuzinza kwesigaba se-XRD ku-1000°C, amandla okuchotshozwa okubandayo ≥18 MPa ngemva kokukhishwa kwe-waxing, nokuphindaphinda kobukhulu okuqinisekiswa ngokuskena kwe-CT—hhayi nje ama-caliper. Silinganise ukuhluka okusuka phakathi kuya komgogodla ngaphansi kuka-0.015 mm eziphasejini zangaphakathi ezingu-80 mm ubude, okubalulekile lapho imvume yokugcina imishini ingu-0.15 mm kuphela ohlangothini ngalunye.
Abanye bangase baphikise ngokuthi ama-sandcast noma ama-cores-in-place cores anciphisa isikhathi sokuhola. Kodwa ngokuhlangenwe nakho kwethu ngezindlu zamasilinda wepompo ye-piston, lezo zindlela zibiza kakhulu ezansi nomfula. Izinhlamvu zesihlabathi zishiya ubulukhuni ngaphezu kuka-Ra 12.5 µm—akwamukeleki ezindaweni zokuvala amanzi ezidinga i-Ra ≤1.6 µm ngemva kokuqeda ukukhanda. Ama-cores omshini wethula ama-microcracks asuka ekuphambukeni kwamathuluzi, asakazeka ngesikhathi sokudubula kwamagobolondo futhi abangele ukuphakanyiswa kwegobolondo lendawo. Silandelele ama-23% amanani aphezulu we-scrap ezingxenyeni ezinjalo ngokumelene nama-ceramic cores anamandla aluhlaza athuthukisiwe kanye namaphrofayela alawulwayo we-sintering. Isixazululo asisheshi—sihlakaniphile: ijiyomethri eyinhloko eqinisekiswe ngaphambili, ukuziphatha okushisayo okufaniswayo, namarekhodi enqwaba alandelekayo aboshelwe endaweni ngayinye yokulingisa.
Yini ehlukanisa umphakeli we-ceramic core onokwethenjelwa nomthengisi webhizinisi? Izinto ezine esiziqinisekisayo nsuku zonke:
- Isitifiketi sempahla eluhlaza: Yonke iqoqo le-silica liphethe imibiko yokuhlola ye-ASTM C704—hhayi nje izimemezelo zabahlinzeki
- Inqubo yokwenza imephu: Ukomiswa okuyisisekelo kulandela i-ISO 9001-controlled humidity ramps (hhayi amashejuli esikhathi esinqunyiwe), kuvimbela ukuqhekeka okuncane kuma-vanes awugqinsi ongu-3.2 mm
- Ukuziphendulela kobukhulu: Sikala wonke ama-core nge-Zeiss CONTURA G2 RDS CMM, hhayi iziqhathanisi zamehlo—okubalulekile kuzici ezilawulwa yi-GD&T ezifana nokubekezelela indawo Ø0.05 mm
- Ukuqinisekiswa kwe-alloy ethize: Ama-co-based cores avivinywa ezinhlelweni zamagobolondo okutshalwa kwezimali kwangempela kusetshenziswa i-slurry viscosity yakho kanye nomjikelezo wokucwilisa, hhayi isikhunta esisasimende esijwayelekile
Leli zinga lokulawula lisivumela ukuthi silethe ama-ceramic cores ahlala eyiqiniso ngokukhipha iwaxing, ukudubula, nokuthululwa kwensimbi—ngisho namajiyometri ayinkimbinkimbi njengemizimba yama-valve anezimbobo eziningi ezinamashaneli okupholisa anobubanzi obungu-2.5 mm ahlanganayo. Amakhasimende aseNyakatho Melika naseYurophu ahlala abika izehlakalo ezimbalwa zokuphinda zisebenze ngo-15–20% ekulingisini okudinga ukubekezelelana okuqinile kwangaphakathi (±0.08 mm). Awukho umlingo. Amapharamitha enqubo abhaliwe nje, i-metrology elinganisiwe, nokuqondanisa kwe-metallurgical eyakhelwe phakathi—akungezwe njengokucatshangelwa kwamuva.
Uma uthola a i-ceramic core yemboni yokutshala imali uhlelo lokusebenza lapho ukusebenza okusebenzayo kuncike ekuthembekeni kwangaphakathi kwekhonta—hhayi nje “kuyalingana”—khona-ke amashidi edatha ebalulekile kanye nezikhathi zokulethwa kubaluleke kakhulu kunamalogu ahambelanayo ashisayo nemibiko yokuhlola ye-CMM. Kwa-QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD., siphatha umongo ngamunye njengengxenye esebenzayo, hhayi into esebenzisekayo. Sabelana ngedatha yokuhlola ephelele namakhasimende ngaphambi kokugunyazwa kwesihloko sokuqala. Silungisa izilinganiso ze-binder ngokusekelwe ekungeneni kwegobolondo lakho—hhayi ifomula yethu ezenzakalelayo. Futhi sigcina amarekhodi eqoqo iminyaka eyi-10, hhayi nje ukuthobela, kodwa ukuze ukwazi ukulandelela noma yikuphi okudidayo ubuyele ekuqhutshweni komshini wokushisa, indawo eluhlaza, kanye nokushintsha komsebenzisi.
Ikusasa lokusakaza okunembayo aliphathelene nezithando zomlilo ezinkulu noma ama-CNC asheshayo. Kumayelana nokuqeda ukuhlukahluka emsuka—kuqale ngomongo. Njengoba kukhula isidingo sezindonga ezincanyana, amaphaseji aqinile, nama-alloy anezinga lokushisa eliphakeme njenge-T800 ne-CMSX-4, ama-ceramic cores azosuka ekuvumela ubuchwepheshe ukuya esangweni lekhwalithi eyinhloko. Lolo shintsho luqala ngokubuza ukuthi "Ingabe lungenziwa?" kodwa “Kungabikezelwa ngokunembe kangakanani ukuziphatha kwayo—futhi kufakazelwe?” Sakhe indawo yethu, amaphrothokholi ethu, nokusebenzisana kwethu ngalowo mbuzo. Ngoba lapho ingxenye yakho isebenza kubha engu-350 ngaphakathi komhlangano wepompo elingasogwini, asikho isikhala sokuqagela endaweni engenalutho.
