Ha baenjiniere ba hlakisa tšepe ente likarolo fektheri Litharollo bakeng sa li-valve tsa hydraulic tse nang le khatello e phahameng kapa li-nozzles tsa pompo ea cobalt-alloy, ha li reke likaroloana feela-li boloka botsitso ba dimensional tlas'a khatello ea 300 MPa, botšepehi ba microstructural ka mor'a phekolo ea mocheso, le zero batch-to-batch drift ho AMS 5387 alloy hardness. Ke ka lebaka leo ho nepahala e seng tleleime ea papatso mona - ke tlhokahalo ea mantlha.
Re bone merero e mengata haholo e ema sethaleng hobane morekisi ea khethiloeng o ile a tšoara MIM e le "ts'ebetso e 'ngoe feela ea phofo." Ha e le hantle, ho etsa ente ea tšepe e atlehileng bakeng sa likarolo tsa indasteri tse bohlokoa haholo ho hloka ho fetang libopi le li-feedstock. E hloka taeo ea metallurgic ho pholletsa le lisebelisoa tsa thepa, taolo ea kinetics e thibelang, li-profiles tsa vacuum sintering tse hlophisitsoeng ka lelapa le leng le le leng - le ho kopanya ka thata-thata le ho qeta CNC le tlhahlobo e lumellanang le GD&T. QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD. e sebetsa ka tsela ena eseng ka mokhoa o ikhethileng empa ka moralo: ntlo e 'ngoe le e' ngoe ea khatello e tsoang ho MIM, cylinder pump piston, kapa winch center shaft roller e qala ka thepa e tala e tiisitsoeng ea T800, eseng phofo ea tšepe e sa tsitsang.
Linnete tse tharo tsa tekheniki li arola bokhoni ba 'nete ho barekisi ba li-catalogs:
- Material traceability ke ntho e ke keng ea buisanoa. Polaka e le 'ngoe ea AMS 5387 cobalt alloy e tlameha ho ba le litokomane tse felletseng tsa mocheso-eseng feela tlaleho ea tlhahlobo ea leloala. Re netefatsa hore na oksijene ea phofo e kenang<0.025%), kabo ea boholo ba likaroloana (D50 = 8-12 µm), le meeli ea masala a binder pele e kenya mohala oa ho kopanya. Ha ho mekhelo.
- MIM ha e eme bakeng sa likarolo tse sebetsang. Hoo e ka bang 92% ea likarolo tsa rona tse hlahisitsoeng ke MIM li etsoa machining a bobeli-haholo-holo bakeng sa ho tiisa bokaholimo, liforomo tsa likhoele le likoranta. Setsi sa rona se lumellanang le ISO se tsamaisa litsi tsa CNC tse nang le li-multi-axis tse haufi ka ho toba le mohala oa sintering, ho felisa lipalangoang tsa li-inter-facility tse behang kotsi ho phatlalatsoa ha micro-crack ka li-superalloy tse brittle.
- Taolo ea dimensional e etsahala pele ho ejection — eseng kamora moo. Puseletso ea shrinkage ha e sebelisoe joalo ka kobo. Bakeng sa ntlo ea li-cylinder tse bophara ba 42-mm ho T800 alloy, re etsa mohlala oa litlamorao tsa mocheso oa mocheso ho pota-potile hlobo, re lokisa li-gradients tse tala ka har'a thepa ea lijo, le ho netefatsa mamello ea ho qetela re sebelisa mechine e lekanyang e lumellanang le litekanyetso tsa ISO 10360-2 - eseng lipapiso tsa mahlo.
Ba bang ba ka 'na ba pheha khang ea hore ho etsa matsete a setso ho fana ka thepa e ntle ea mochini bakeng sa likarolo tse teteaneng tsa cobalt. Empa lintlha tsa rona li bontša ka tsela e fapaneng: bakeng sa botenya ba marako ka tlas'a 12 mm, MIM e fana ka matla a 15-18% a phahameng a matla le 22% e ntlafetseng ea ho hanyetsa mokhathala ho AMS 5387-hobane microstructure e ts'oanelang hantle e nka sebaka sa mehaho ea dendritic cast. Phetoho ea khoebo? Litšitiso tse thata tsa geometri. Ha re amohele MIM bakeng sa likarolo tse nang le likarolo tse fetang 8:1 kapa likarolo tse ka hare tse nyane ho feta Ø0.3 mm ntle le tšebelisano 'moho. Botšepehi boo bo thibela ho sebetsa hape ho theko e boima hamorao.
Seo basebelisi ba hlileng ba se botsang-le hore na liphello tsa morero li fetola eng-ha se "Na u ka li etsa?" empa "Na o ka tšoara ± 0.015 mm sebakeng sa cylindrical sa 120-mm ka mor'a * nitriding?" kapa "Na karolo ea hau ea T800 MIM e tla pholoha lipotoloho tse 10,000 ho 180 ° C ho phallo ea oli e ngata ea H₂S?" Karabo ea rona e lula e tšehetsoa ke litlaleho tsa liteko-eseng litšepiso. Sehlopha se seng le se seng se kenyelletsa mehlala e matla e lekiloeng ho latela ASTM E8, 'mapa o thata ho pholletsa le libaka tse mahlonoko, le netefatso ea spray ea letsoai bakeng sa libaka tse felileng. Re boloka mehlala ka lilemo tse 5. Haeba moreki a botsa ka ts'ebetso, re hula tlaleho ea mantlha ea CMM, logi ea sintering, le curve ea kalafo ea mocheso-tsohle li tlameletsoe ho nomoro e le 'ngoe ea serial.
Boemo boo ba kopano e otlolohileng - thuto ea thepa, ts'ebetso ea MIM, machining e nepahetseng, kalafo ea mocheso, le tlhahlobo ea ts'ebetso ka tlas'a marulelo a le mong - e bolela li-handoffs tse fokolang, tlhahlobo e potlakileng ea sesosa le ho se utloisisehe ha ntho e itseng e oela ka ntle. Ho boetse ho bolela hore re ts'oara litaba tsa manufacturability pele: kotara e fetileng, re tšoaile callout ea GD&T e neng e nahana hore ho fokotseha ha isotropic 'meleng o rarahaneng oa li-valve. Redesign e pholositse moreki libeke tse tharo le $27,000 ho lisebelisoa tse lahliloeng tsa sehlooho sa pele.
Ha u sheba pele, botlolo ea 'nete ka MIM e phahameng ea alloy ha se lisebelisoa-ke tsebo ea kopo. Re ntse re holisa tsepamiso ea rona ea R&D lits'ebetsong tse nyalisitsoeng: ho kopanya li-cores tsa MIM tsa sebopeho sa net le likhetla tse ka ntle tsa lehlabathe bakeng sa metheo ea pompo ea bophara bo boholo, ebe re lokisa likhokahano tse sebetsang feela. Sena se fokotsa boima ba 'mele ka 31%, se ntlafatsa kabo ea bongata ba mocheso,' me se boloka khanyetso e felletseng ea kutu moo e leng bohlokoa haholo.
Haeba odara ea hau e latelang e kenyelletsa likarolo tsa MIM tsa cobalt-nickel bakeng sa lisebelisoa tsa hydraulic, lisebelisoa tsa oli le khase, kapa likopano tsa koloi ea boenjiniere - 'me u hloka ho pheta-pheta, eseng feela mamello e qotsitsoeng - ebe ho netefatsa taolo ea 'nete ea MIM ea mofani oa thepa ho feta banner ea bona ea sebaka sa marang-rang. Kopa lethathamo la bona la morao-rao la AMS 5387 sintering. Kopa tlaleho ea bona ea CMM mabapi le sehlopha sa morao-rao sa nozzle sa T800. Netefatsa hore na "fektheri ea bona ea ho bopa ente ea tšepe" e sebetsana le setifikeiti sa thepa ka tlung kapa e fana ka eona. Likarabo li tla u bolella tsohle.
