Lapho onjiniyela bayacacisa imboni yokubumba izingxenye zensimbi yomjovo wensimbi izixazululo zamavalvu we-hydraulic we-high-pressure hydraulic noma ama-cobalt-alloy pump nozzles, azithengi nje izingxenye-zivikela ukuqina kwe-dimensional ngaphansi kwengcindezi engu-300 MPa, ubuqotho be-microstructural ngemva kokwelashwa kokushisa, kanye ne-zero batch-to-batch drift ku-AMS 5387 i-alloy hardness. Kungakho ukunemba kungesona isimangalo sokumaketha lapha—kuyisidingo esiyisisekelo.
Sibone amaphrojekthi amaningi kakhulu ema esigabeni se-prototype ngoba umphakeli okhethiwe uphathe i-MIM “njengenye inqubo yempushana.” Eqinisweni, ukubumba okuphumelelayo komjovo wensimbi kwezingxenye zezimboni ezibaluleke kakhulu kudinga okungaphezu kweziko lokucwilisa kanye ne-feedstock. Kudinga isiyalo se-metallurgical ekutholeni izinto ezibonakalayo, ukulawula kwe-kinetics eboshiwe, amaphrofayli e-vacuum sintering ashuniswe umndeni ngamunye we-alloy—kanye nokuhlanganiswa okuqinile—okuqinile nokuqedwa kwe-CNC kanye nokuhlola okuthobelana ne-GD&T. QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD. isebenza ngale ndlela hhayi ngokuhlukile kodwa ngokuklama: zonke izindlu zamavalvu okucindezela asuselwa ku-MIM, isilinda sepompo le-piston, noma i-winch center shaft roller iqala ngento eluhlaza esekelwe ku-T800 esekelwe ku-cobalt, hhayi impushana yensimbi engenasici.
Amaqiniso amathathu obuchwepheshe ahlukanisa amandla eqiniso kubathengisi bekhathalogi:
- Ukulandeleka kokubalulekile akuxoxiswana ngakho. Ipulaki eyodwa ye-AMS 5387 cobalt alloy kufanele ibe nemibhalo yenqwaba yokushisa—hhayi nje umbiko wokuhlola isigayo. Siqinisekisa okuqukethwe komoyampilo okuyimpushana engenayo (<0.025%), ukusatshalaliswa kosayizi wezinhlayiyana (D50 = 8–12 µm), kanye nemikhawulo yensalela ye-binder ngaphambi kokulayisha emugqeni wokuxuba. Akukho okuhlukile.
- I-MIM ayizimele ezingxenyeni ezisebenzayo. Cishe u-92% wezingxenye zethu ezikhiqizwe yi-MIM zenza imishini yesibili—ikakhulukazi ezindaweni zokuvala, amafomu entambo, namajenali anezinhlamvu. Indawo yethu ethobela i-ISO isebenzisa izikhungo ze-CNC ezinama-axis amaningi eduze ngqo nolayini we-sintering, esusa ukuhamba phakathi kwesikhungo esibeka engcupheni ukusakazwa kwe-micro-crack kuma-brittle superalloy.
- Ukulawulwa kwe-Dimensional kwenzeka ngaphambi kokukhishwa-hhayi ngemva kwalokho. Isinxephezelo se-shrinkage asisetshenziswa njengento yokulala. Ngezindlu zesilinda esingu-42-mm-diameter ku-T800 alloy, senza imodeli yemiphumela ye-gradient eshisayo kuyo yonke indawo yokukhunta, silungise ama-gradients okuminyana okuluhlaza kusitoko, futhi siqinisekise ukubekezelelana kokugcina sisebenzisa imishini yokulinganisa ehlanganisiwe elinganiswe kuzindinganiso ze-ISO 10360-2—hhayi iziqhathanisi zokubona.
Abanye bangase baphikise ngokuthi ukutshalwa kwezimali kwendabuko kunikeza izakhiwo ezingcono zemishini yezingxenye eziwugqinsi ze-cobalt. Kodwa idatha yethu ibonisa okuhlukile: ngokuqina kwezindonga ezingaphansi kuka-12 mm, i-MIM iletha amandla okuqina aphakeme angu-15–18% kanye no-22% othuthukisiwe ukumelana nokukhathala ku-AMS 5387—ngoba i-microstructure ecolisekile efanayo ithatha indawo yezakhiwo ze-dendritic cast. Ukuhwebelana? Izithiyo zejiyomethri eziqinile. Asiyamukeli i-MIM yezingxenye ezinokubukeka kwezilinganiso ezingaphezu kuka-8:1 noma izici zangaphakathi ezincane kuno-Ø0.3 mm ngaphandle kokuhlanganyela kokuklama kabusha. Lokho kwethembeka kuvimbela ukusebenza kabusha okubizayo kamuva.
Lokho abasebenzisi abakubuzayo ngempela-futhi yiziphi izinguquko zemiphumela yephrojekthi-akukona ukuthi "Ungakwazi ukuphumelela?" kodwa “Ungakwazi ukubamba ±0.015 mm endaweni eyisilinda engu-120-mm ngemva* kwe-nitriding?” noma “Ingabe ingxenye yakho ye-T800 MIM izosinda emijikelezweni engu-10,000 ku-180°C ekugelezeni kukawoyela ocebile nge-H₂S?” Impendulo yethu ihlale isekelwa imibiko yokuhlola—hhayi izithembiso. Iqoqo ngalinye lihlanganisa izibonelo eziqinile ezivivinywa nge-ASTM E8 ngayinye, imephu yobulukhuni kuzo zonke izindawo ezibucayi, nokuqinisekiswa kwesifutho sikasawoti ezindaweni eziqediwe. Sigcina amasampula iminyaka emi-5. Uma ikhasimende libuza ukusebenza, sidonsa umbiko woqobo we-CMM, ilogi ye-sintering, kanye nejika lokwelapha ukushisa—konke kuhlanganiswe nenombolo ye-serial eyodwa.
Lelo zinga lokuhlanganiswa okuqondile—ukufaneleka kokubalulekile, ukucutshungulwa kwe-MIM, ukunemba kwemishini, ukwelashwa kokushisa, nokuhlola ukusebenza ngaphansi kophahla olulodwa—lisho ukukhishwa okumbalwa, ukuhlaziya imbangela esheshayo, kanye nokungaqondakali kahle uma okuthile kuwela ngaphandle kwe-spec. Kusho futhi ukuthi sibamba izinkinga zokwenziwa kusenesikhathi: ikota edlule, sihlabe umkhosi i-callout ye-GD&T ethatha njengokuncipha kwe-isotropic emzimbeni wevalvu eyinkimbinkimbi. Ukudizayina kabusha konge ikhasimende amasonto amathathu kanye no-$27,000 ekusetshenzisweni kwamathuluzi e-athikili yokuqala elahliwe.
Uma ubheka phambili, ibhodlela langempela ku-MIM ye-alloy ephezulu akuyona imishini-ulwazi lohlelo lokusebenza. Sinweba ukugxila kwethu kwe-R&D ezinqubweni ezixubile: ukuhlanganisa ama-MIM-net-shape cores namagobolondo angaphandle asakazwa ngesihlabathi ngokunemba ezisekelweni zephampu ezinobubanzi obukhulu, bese sisebenzisa izixhumi ezibonakalayo ezisebenzayo kuphela. Lokhu kunciphisa isisindo ngo-31%, kuthuthukisa ukusabalalisa kwesisindo esishisayo, futhi kugcina ukumelana nokugqwala okugcwele lapho kubaluleke kakhulu.
Uma i-oda lakho elilandelayo lihlanganisa izingxenye ze-MIM ze-cobalt-nickel zamasistimu asebenza ngogesi, amathuluzi esevisi kawoyela negesi, noma imihlangano yewintshi yemoto yobunjiniyela—futhi udinga ukuphindaphindwa okubhaliwe, hhayi nje ukubekezelela okucashuniwe—bese uqinisekisa ukulawulwa kwangempela kwenqubo ye-MIM yomphakeli kubaluleke ngaphezu kwesibhengezo sewebhusayithi yabo. Buza ilogi yabo yakamuva ye-AMS 5387 sintering. Cela umbiko wabo we-CMM ngenqwaba yenozzle ye-T800 yakamuva. Qinisekisa ukuthi "imboni yabo yezingxenye zokubumba umjovo wensimbi" iyasiphatha yini isitifiketi esibalulekile endlini noma iyasikhipha. Izimpendulo zizokutshela konke.
