Xa uphonsa i-cobalt alloy pump yendlu yenkonzo ye-hydraulic ephezulu-okanye i-AMS 5387 nozzle ekufuneka iphile kwi-650 ° C kunye noxinzelelo lwe-cyclic thermal-ingundoqo ye-ceramic ayikho nje i-mold component elahlayo. Ngumakhi othuleyo wejometri yangaphakathi, i-guarantor yolawulo lobunzima bodonga, umgca wokuqala wokukhusela ngokuchasene nokukhukuliseka komgangatho wotyalo-mali. Kwi-QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD., siye sabona ii-ceramic cores zisilela phakathi kokugalela kwi-T800-based impeller shrouds-hayi ngenxa yokudinwa kakubi kwe-binder, kodwa ngenxa yokuba i-coefficient yokwanda kwe-thermal (CTE) engafaniyo neqokobhe ayizange iqinisekiswe ngaphesheya kwe-25 ° C-110 epheleleyo. Yiyo loo nto "undoqo we-ceramic wotyalo-mali lotyalo-mali" ingelilo ixesha lokukhangela imveliso kuthi. Yinkcazo echanekileyo eneziphumo zehlabathi lokwenyani.
Senza ngaphezulu kwe-12,000 yeecores ze-ceramic ngonyaka-nganye yenzelwe inkqubo yealloy ethile, uyilo lokungena, kunye nemvulophu yokuphoswa komatshini. Iinqununu zethu ezisemgangathweni zisebenzisa i-silica-alumina edibeneyo exutywe kunye nee-CTE ezilungelelanisiweyo ukuya kwi-±0.2 × 10⁻⁶/°C ngokuchasene ne-CoCr alloys; ukwakheka ngokwesiko kubandakanya i-zirconia-yomelezelwe ukwahluka kwe>1200 ° C izilingo ze-titanium aluminide. Ngokungafaniyo ne-off-the-shelf cores ezithengiswa ngabanikezeli be-refractory jikelele, ezethu zifumana iziqinisekiso ezintathu ezingenakuxoxisana ngaphambi kokukhululwa: ukuzinza kwesigaba se-XRD kwi-1000 ° C, amandla okutyumza okubandayo ≥18 MPa emva kokuchithwa kwe-dewaxing, kunye nokuphindaphinda kwe-dimensional eqinisekisiwe nge-CT scanning-kungekhona nje ii-calipers. Silinganise ukuhluka kwe-core-to-core phantsi kwe-0.015 mm kwiipaseji zangaphakathi ze-80 mm ubude, okubalulekileyo xa isibonelelo sokugqibela somatshini si-0.15 mm kuphela kwicala ngalinye.
Abanye banokuphikisa ukuba i-santi-cast okanye i-cores-in-place cores inciphisa ixesha lokukhokela. Kodwa kumava ethu ngepiston pump cylinder housings, ezo ndlela zinokuthi zibiza kakhulu ezantsi. Iinqobo zesanti zishiya uburhabaxa ngaphezulu kwe-Ra 12.5 µm-ayimkelekanga kwimigangatho yokutywinwa ngoxinzelelo lwehydraulic efuna iRa ≤1.6 µm emva kokwenziwa komatshini. Iicores ezichithiweyo zazisa ii-microcracks ukusuka ekujikeni kwesixhobo, ezithi zisasazeke ngexesha lokudubula kweqokobhe kwaye zibangele ukuphakanyiswa kweqokobhe lasekhaya. Silandele i-23% yamazinga aphezulu e-scrap kwiindawo ezinjalo ngokuchasene ne-ceramic cores kunye namandla aluhlaza okongeziweyo kunye neeprofayili ezilawulwayo ze-sintering. Isisombululo asikhawulezanga-sinobuqili ngakumbi: ijometri engundoqo eqinisekisiweyo yangaphambili, ukuziphatha okuhambelana ne-thermal, kunye neerekhodi zebhetshi ezinokulandeleka zibotshelelwe kwiqashiso lokuphosa.
Yintoni eyahlula umthengisi we-ceramic othembekileyo kumthengisi wentengiselwano? Izinto ezine esiziqinisekisayo yonke imihla:
- Isiqinisekiso semathiriyeli ekrwada: Yonke ibhetshi ye-silica ineengxelo zovavanyo ze-ASTM C704-hayi nje izibhengezo zababoneleli
- Inkqubo yokwenza imephu: Ukomisa okungundoqo kulandela i-ISO 9001-controlled humidity ramps (hayi iishedyuli zexesha elimiselweyo), ukuthintela ukukrazuka kancinci kwi-3.2 mm-thick vanes
- Uxanduva lokuphendula: Silinganisa yonke ingundoqo nge-Zeiss CONTURA G2 RDS CMM, hayi i-optical comparates-ibaluleke kakhulu kwi-GD&T-controlled features like position tolerance Ø0.05 mm
- Ukuqinisekiswa kwe-alloy-specific: Ii-cores ezisekwe ngokudibeneyo zivavanywa kwiinkqubo zeqokobhe lotyalo-mali lokwenyani zisebenzisa i-slurry viscosity yakho kunye nomjikelo wediphu, hayi ukubumba ngodaka oluqhelekileyo.
Eli nqanaba lolawulo lisivumela ukuba sihambise ii-cores ze-ceramic ezibambe inyani ngokukhupha iwaxing, ukudubula, kunye nokugalelwa kwentsimbi-kwanakwiijometri ezintsonkothileyo njengemizimba yevalvu eneembombo ezininzi ezinqumlanayo ezi-2.5 mm-diameter zokupholisa iitshaneli. Abathengi baseMntla Melika naseYurophu bahlala benika ingxelo nge-15-20% yeziganeko ezimbalwa zokuphinda zisebenze kwii-castings ezifuna ukunyamezela kwangaphakathi okuqinileyo (± 0.08 mm). Akukho umlingo. Iiparamitha zenkqubo ebhaliweyo nje, i-metrology elungelelanisiweyo, kunye nokulungelelaniswa kwe-metallurgical eyakhelwe kumbindi-ayidityaniswanga njengengcinga engemva.
Ukuba ukhangela a isiseko seceramic kumzi mveliso wokugalela imali isicelo apho ukusebenza okusebenzayo kuxhomekeke kukuthembeka kwecontour yangaphakathi-kungekhona nje "ifanele"-ke amaphepha edatha yezinto eziphathekayo kunye namaxesha okuhambisa abalulekile ngaphantsi kweelogi ezihambelana ne-thermal kunye neengxelo zokuhlola ze-CMM. E-QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD., Siphatha undoqo ngamnye njengecandelo elisebenzayo, hayi into etyiwayo. Sabelana ngedatha epheleleyo yovavanyo kunye nabathengi ngaphambi kokuvunywa kwenqaku lokuqala. Sihlengahlengisa umlinganiselo wesibophelelo ngokusekwe ekungeneni kweqokobhe lakho—hayi indlela yethu emiselweyo. Kwaye sigcina iirekhodi zebhetshi iminyaka eli-10, hayi nje ukuthobela, kodwa ukuze ukwazi ukulandelela nakuphi na ukungahambi kakuhle emva kweyona ndawo ibalekayo, iqashiso, kunye nokutshintsha komsebenzisi.
Ikamva lokuphosa ngokuchanekileyo alikho malunga neziko ezinkulu okanye ii-CNC ezikhawulezayo. Kumalunga nokuphelisa ukuguquguquka kwimvelaphi-ukuqala ngondoqo. Njengoko imfuno ikhula kwiindonga ezinqabileyo, iipaseji eziqinileyo, kunye ne-alloys yobushushu obuphezulu njenge-T800 kunye ne-CMSX-4, ii-ceramic cores ziya kuhamba ukusuka kwitekhnoloji yokuvumela ukuya kwisango lomgangatho wokuqala. Olu tshintsho luqala ngokubuza ukuba "Ngaba inokwenziwa?" kodwa “Inokuchaneka njani indlela yokuziphatha kwayo—kwaye ingqinwe?” Sakhe indawo yethu, iiprothokholi zethu, kunye nentsebenziswano yethu malunga nalo mbuzo. Kuba xa inxalenye yakho isebenza kwibha ye-350 ngaphakathi kwendibano yempompo engaselunxwemeni, akukho ndawo yokuqikelela kwindawo engenanto.
