Ha lienjineri li hloka likarolo tsa tšepe tse nepahetseng haholo tse mamellang khatello ea hydraulic ea 30,000 psi, ho hanela ho lla ka har'a matlo a pompo ea metsi a letsoai, kapa ho boloka botsitso ka mor'a kalafo ea mocheso oa 800 ° C - mochini o tloaelehileng oa mochini kapa oa ho lahla hangata o oa fokola. Ke hona moo nnete fektheri ea mokhoa oa ho etsa ente ea tšepe e fumana sebaka sa eona: eseng joalo ka morekisi ea tloaelehileng, empa e le molekane oa tekheniki ea tsebang hantle fisiks ea li-microstructures tse entsoeng hantle, li-binder burnout kinetics, le puseletso ea shrinkage ea sintering.
Re bone bareki ba romella li-prototypes tsa MIM tse nang le ± 0.3% mamello ea mela - feela ho fumana nakong ea tlhahlobo ea ts'ebetso hore li-nozzles tsa cobalt alloy li sothehile tlas'a baesekele e futhumetseng. Motso oa sesosa? Taolo e sa lekaneng holim'a sekhahla sa ho kheloha ha litsela le sebaka sa phoka sa sintering. Ho QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD., MIM e 'ngoe le e 'ngoe e qala ka AMS 5387 kapa T800 ea phofo ea setifikeiti-eseng data ea tensile feela, empa litaba tsa oksijene, kabo ea boholo ba likaroloana (D50 ≤ 8.2 µm), le netefatso ea tepi. Re hana lihlopha tse ka ntle ho 4.2–4.4 g/cm³. Sena ha se overkill. Ke kamoo re tšoarang ± 0.05 limilimithara ho 12-mm-diameter piston cylinder cylinder house bores ka mor'a ho sintering.
Lifeme tse ngata li nka MIM e le "phofo + hlobo + mollo." Re e nka e le lithupelo tse tharo tse kopantsoeng ka thata-thata: sebopeho sa phepelo se laoloang ke rheology, sebopeho se nepahetseng sa mouta se lekanyelitsoeng bakeng sa shrinkage ea anisotropic, le sintering e laoloang ke moea ka nako ea sebele ea ho shebella khatello ea nakoana ea oksijene. Ka mohlala, li-plug tsa rona tsa cobalt-nickel alloy li hloka profil ea sintering ea mekhahlelo e 'meli: metsotso ea 60 ho 1150 ° C ho 5% H₂-95% N₂ ho tlosa carbon e setseng, ebe metsotso ea 90 ho 1320 ° C ka hydrogen e hloekileng ho finyella> 99.2% density. Tlola mohato o mong le o mong, 'me boima bo theoha ho tloha ho 42 HRC ho ea ho 36 HRC-e lekaneng ho etsa hore litulo tsa li-valve li roale pele ho nako. Re kenya paramente e 'ngoe le e' ngoe. Sehlopha se seng le se seng se na le ts'ebetso e felletseng: lotho ea phofo, palo e kopanyang, ID ea sebopi sa hlobo, sebaka sa sebōpi se chesang, le tlaleho ea tlhahlobo ea CMM.
Khokahano e otlolohileng e re arola ho barekisi. Ha re fane ka lits'oants'o tsa sintering. Ha re bue ka mochini oa ho qetela. Setsi sa rona se lumellanang le ISO se tsamaisa MIM hammoho le machining a CNC a li-axis tse hlano, ho kenya matsete, le ho hloekisa mocheso oa vacuum - kaofela tlas'a marulelo a le mong. Ha moreki a romella setšoantšo sa GD&T bakeng sa karolo ea pompo ea AMS 5387 e nang le mehala ea 'nete ho likoti tse robeli tsa Ø3.2 mm tse amanang le datum ea Ø25 mm, ha re kope ho hlakisoa. Re etsisa mokhoa oa ho kheloha, ho fetola mokhoa oa ho khopamisa ka morao ho sintering re sebelisa limmapa tsa khale tsa ho honyela, 'me re sebelisa mokhoa oa ho thinya ha bobebe feela moo ho tiisang hore ho hloka Ra ≤ 0.4 µm. Ha ho rework. Ha ho na lintho tse makatsang. Ho latela melao ea pele feela.
Ho tsamaisoa ha 'nete lefatšeng ho ipapisitse le se etsahalang pele ho thunya ea pele. Re hlahlobile litšoantšo tse fetang 1,200 tse lokiselitsoeng ke MIM ho tloha ka 2020-'me re fumane lintlha tse tharo tse hlōlehileng khafetsa: li-undercuts tse hlokang li-electrode tsa metsi tsa EDM ho e-na le tšepe e tloaelehileng ea hlobo, liphetoho tsa lebota tse fetang 3: 1 tekanyo (e bakang ho fokotseha ho fapaneng), le masoba a foufetseng a tebileng ho feta 4 × bophara (trapping binder). Sehlopha sa rona sa boenjiniere se tšoaea tsena tlhahlobong ea pele ho tlhahiso - mahala - mme se sisinya li-tweaks tsa geometry tse fokotsang litšenyehelo ka 22% ka kakaretso. Moreki e mong oa thepa ea lebaleng la oli ea Amerika Leboea o ile a fokotsa nako ea ho etella pele ho tloha libekeng tse 14 ho isa ho libeke tse 6.5 ka mor'a ho amohela letoto la rona la maikutlo la DFM.
Haeba ts'ebeliso ea hau e hloka ho pheta-pheta li-unit tse 5,000, ts'ebetso ea metallurgical ho li-batch tse 20, kapa netefatso ea ts'ebetso e fetang ASTM B962, o hloka ho feta feme ea mochini oa ente ea tšepe. U hloka molekane ea tšoarang gram e 'ngoe le e' ngoe ea cobalt alloy joaloka lisebelisoa tse lekantsoeng-'me a lekanya katleho eseng ka mabokoseng a rometsoeng, empa ka ho hlōleha ha tšimo ka mor'a lihora tse 10,000 tsa ho sebetsa. QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD. e haha bonnete boo mohatong o mong le o mong oa ts'ebetso. Eseng joalo ka khopolo. Joalo ka tloaelo ea letsatsi le letsatsi.
