Lapho onjiniyela becacisa ukufakwa kwe-silica sol kwe-investimenti yezingxenye zensimbi ezinembayo, abagcini nje ngokukhetha inqubo—bakhetha isiqinisekiso sokuzinza kobukhulu, ukwethembeka kwendawo, nokuvumelana kwensimbi ngaphansi kwezimo zesevisi ezeqisayo. Kwa-QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD., senze izinombolo zezingxenye ezihlukile ezingaphezu kuka-12,000 sisebenzisa i-silica sol—iningi lama-cobalt-nickel alloys njenge-AMS 5387 ne-T800—lapho ukubekezelela okungu-±0.05 mm kungeyona into ehlosiwe; yisisekelo.
Kungani i-silica sol—hhayi ingilazi yamanzi noma ukhonkolo—iletha ukunemba okuphindaphindwayo
Abathengi abaningi bacabanga ukuthi "ukutshala imali" kuyindlela eyodwa. Akunjalo. Isistimu yokuhlanganisa ichaza imikhawulo yokusebenza. I-silica sol isebenzisa i-colloidal silica (i-SiO₂ nanoparticles emisiwe emanzini) njengesibophezelo esiyinhloko. I-viscosity yayo ephansi ingena imininingwane emihle; i-refractoriness yayo ephezulu imelana nezinga lokushisa elingu-1,550°C lama-superalloys. Amasistimu wengilazi yamanzi aqhekeka ngaphansi kokushaqeka okushisayo. Ukubunjwa kwe-Plaster kwehla ngaphezu kwe-600 ° C-konakalisa i-microstructure ezindlini zephampu ezisekelwe ku-cobalt.
Sibone amakhasimende eshintsha esuka engilazini yamanzi eya ku-silica sol ngemuva kokuthi amaqoqo amathathu alandelanayo ehlulekile ukuhlolwa kwengcindezi kubha engu-420. Imbangela? Ama-Microcracks odongeni lwegobolondo, awabonakali ngokubonakalayo kodwa aqinisekiswa yi-SEM fractography. Amagobolondo e-silica sol awabonisi amaphutha anjalo—ngisho nakuma-vane awugqinsi angu-0.3 mm kuma-nozzle we-turbine nozzle. Kungakho ifekthri yethu ye-silica sol yokufaka utshalomali inesitifiketi se-ISO 9001:2015 esinokulandeleka okugcwele kuze kufike endaweni yokushisa, ukusabalalisa usayizi wezinhlayiyana ze-slurry, nokulawula iphuzu lamazolo ngesikhathi somiswa.
Ukuhlanganiswa okuqondile akukona ukumaketha—yindlela esibamba ngayo ±0.03 mm kumasilinda angama-300-mm
Abanye abahlinzeki bangaphandle bakhipha amagobolondo, ukusakaza, nokwenza imishini. Senza zontathu endaweni eyodwa ethobela i-ISO e-Qingdao. Kubaluleke ngani lokho? Ngoba indlu yesilinda yepompo ye-piston idinga ukunwetshwa okushisayo phakathi kwegobolondo, ingxubevange, ne-CNC fixture. Uma ukusakaza kanye nokwenza imishini kwenzeka ngaphansi kophahla olulodwa, silinganisa ama-CMM probes ngokumelene nendawo yedatha esakazwayo—hhayi amamodeli e-CAD etiyetha. Sikala ama-shrinkage vectors ngeqoqo ngalinye le-alloy, bese silungisa izindlela zamathuluzi ngaphambi kokusika.
Isibonelo: Ingxubevange ye-cobalt ye-AMS 5387 incipha ngo-1.82% ngokulandelana esikhunjeni se-silica sol—kodwa kuphela lapho amazolo ehlala ngaphansi -25°C phakathi nokoma kokugcina. Singena kuwo wonke umjikelezo wokomisa. Uma umswakama ukhuphuka, sisakaza kabusha igobolondo. Akukho okuhlukile. Leso siyalo sisivumela ukuthi sibambe ama-callouts e-GD&T njengendawo ⊕ 0.05 mm MMC ezimbotsheni zokukhweza eziyisishiyagalombili ezihlukaniswe ngokulinganayo—ngaphandle kokugaya okwesibili.
Ukuqinisekiswa komhlaba wangempela—hhayi imininingwane yelebhu—kudonsa okubalulekile nokukhethwa kwenqubo
Amakhasimende ayabuza: “Ungakwazi yini ukuphonsa ingxubevange ye-T800 kurola we-shaft centre engajwayelekile yewintshi?” Yebo—kodwa kuphela uma siqinisekisa ukwakheka kwesango kuqala. I-T800 iqina ngokuhlukaniswa okukhulu kwe-dendritic. Isango elibekwe kabi lidala i-centerline porosity ehlombe lobubanzi obungu-75-mm. Sisebenzisa ukulingisa kokuqinisa (sisebenzisa i-MAGMASOFT®), bese siqinisekisa nge-X-ray CT scans ekulingweni kokulinga okuthathu. Kulapho kuphela lapho sivuma khona iphethini.
Yilapho ukuzizwisa kuhlukanisa khona ithiyori nokulethwa. Senze imibhobho ye-cobalt alloy yamaphampu omjovo we-subsea asebenza ku-120°C naku-350 bar. Ukwehluleka kusho ukuphumula okungu-$2M. Ngakho sihlola yonke iqoqo: amandla aqinile ≥1,050 MPa, ubude ≥8%, kanye nokumelana nokugqwala kwe-intergranular nge-ASTM G28A ngayinye. Asikho isitifiketi esingenayo idatha yokuhlola. Akukho ukuthunyelwa ngaphandle kombiko wokuhlola osayiniwe.
Yini ongayilindela uma usebenzisana nefekthri ye-silica sol investment casting
Uma ingxenye yakho inezindonga ezincane (<2 mm), amaphaseji angaphakathi ayinkimbinkimbi, noma ifuna i-Rz ≤ 1.6 µm as-cast surface finish—udinga i-silica sol. Kodwa impumelelo incike ekubambisaneni, hhayi nje emandleni. Kwa-QINGDAO QIANGSENYUAN, ukubuyekezwa konjiniyela kuqala ngaphambi kokucaphuna: sihlaba umkhosi ama-engeli asalungiswa angaphansi kuka-0.5°, siphakamisa i-radii yokukhulula ukucindezeleka, futhi siqinisekise ukuthi isici singasakazwa yini—noma kufanele sifakwe ngomshini ngemva kokuthelwa.
Asiwathengisi ama-castings. Siletha izingxenye ezisebenzayo: amavalvu okucindezela avala kubha engu-450, izisekelo zephampu ezidambisa ukudlidliza okungu-3,200 rpm, ama-winch shaft roller asinda emijikelezweni engu-10⁶ emoyeni onosawoti. Lonke i-oda lihlanganisa izitifiketi zezinto ezibonakalayo, imibiko ye-CMM, namalogi okwelapha ukushisa. Isikhathi esiholayo? Amaviki angu-14 esihloko sokuqala, amaviki angu-8 okuphinda—aqinisekisiwe. Akuthenjisiwe. Kuqinisekisiwe.
Uma sibheka phambili, ifekthri yethu ye-silica sol investment casting inweba umugqa wayo wenqubo oyingxubevange—ihlanganisa ukusakaza komumo oseduze nenetha nokugaya okunama-axis amaningi ngokusetha okukodwa. Lokho kuqeda amaphutha okulungisa kabusha futhi kunciphisa isikhathi somjikelezo ngo-37% ezingxenyeni ezifana namabhulokhi ahlukahlukene we-hydraulic. Ukunemba akumile. Nathi akunjalo.
