Lapho onjiniyela bedinga izingxenye zensimbi ezinemba kakhulu ezimelana nomfutho we-hydraulic ongu-30,000 we-psi, ezimelana nokugabavula ezindlini zephampu yamanzi anosawoti, noma zigcine ukuqina kohlangothi ngemva kokwelashwa kokushisa okungu-800°C—imishini evamile noma i-die casting ngokuvamile ayiphumeleli. Kulapho kuyiqiniso imboni yenqubo yokubumba umjovo wensimbi izuza indawo yayo: hhayi njengomhlinzeki wejenerikhi, kodwa njengozakwethu wezobuchwepheshe oyazi kahle i-fiziksi ye-fine-grained microstructures, i-binder burnout kinetics, nesinxephezelo sokuncipha kwe-sintering.
Sibonile amakhasimende ethutha ama-MIM prototypes ano-±0.3% wokubekezelela komugqa—ukuthola kuphela ngesikhathi sokuhlolwa kokusebenza ukuthi imibhobho ye-cobalt alloy yasonteka ngaphansi kokuhamba ngebhayisikili okushisayo. Imbangela? Ukulawulwa okungenele phezu kwamazinga erempu ebophayo kanye nendawo yamazolo e-sintering. Kwa-QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD., yonke inkatho ye-MIM iqala ngesitifiketi se-powder ye-AMS 5387 noma i-T800—hhayi nje idatha eqinile, kodwa okuqukethwe komoyampilo, ukusatshalaliswa kosayizi wezinhlayiyana (D50 ≤ 8.2 µm), nokuqinisekisa ukuminyana kampompi. Sinqaba amaqoqo ngaphandle kuka-4.2–4.4 g/cm³. Lokhu akukona ukudlula ngokweqile. Kuyindlela esibamba ngayo u-±0.05 mm kumabhore wezindlu wephampu yepiston engu-12-mm-diameter ngemva kokucwiliswa.
Izimboni eziningi ziphatha i-MIM “njengempuphu + isikhunta + umlilo.” Siyiphatha njengemikhakha emithathu ehlanganiswe ngokuqinile: ukwakhiwa kwesitoko esilawulwa yi-rheology, idizayini yesikhunta esinembayo esilinganiselwe ukuncipha kwe-anisotropic, kanye ne-sintering elawulwa yi-atmosphere enokuqapha kwengxenye ye-oxygen yesikhathi sangempela. Isibonelo, ama-plugs wethu we-cobalt-nickel alloy adinga iphrofayili ye-sintering enezigaba ezimbili: imizuzu engu-60 ku-1150 ° C ku-5% H₂–95% N₂ ukuze kukhishwe ikhabhoni esele, bese kuba imizuzu engu-90 ku-1320 ° C ku-hydrogen ehlanzekile ukuze kuzuzwe ukuminyana >99.2%. Yeqa noma yisiphi isinyathelo, futhi ukuqina kwehla kusuka ku-42 HRC kuya ku-36 HRC—okwanele ukubangela ukuguga ngaphambi kwesikhathi ezihlalweni zamavalvu omjikelezo omkhulu. Singena yonke ipharamitha. Iqoqo ngalinye liphethe ukulandeleka okugcwele: indawo eyimpushana, inkatho yokuhlanganisa, i-ID yesikhunta sesikhunta, indawo yesithando somlilo, kanye nombiko wokuhlola we-CMM.
Ukuhlanganiswa okuqondile kusihlukanisa nabathengi. Asikhiphi i-sintering. Asiyisebenzisi imishini yokugcina. Indawo yethu ethobela i-ISO isebenzisa i-MIM eduze kwemishini ye-CNC ye-axis emihlanu, ukufaka utshalomali, nokwelashwa kokushisa kwevacuum—konke ngaphansi kophahla olulodwa. Uma ikhasimende lithumela umdwebo we-GD&T wengxenye yephampu ye-AMS 5387 enezimbobo zangempela ezingu-Ø3.2 mm ezihlotshaniswa ne-datum engu-Ø25 mm, asiceli ukucaciselwa. Silingisa ukuchezuka okubangelwa umzila wamathuluzi, silungisela ukuhlanekezela kwangemva kwe-sintering sisebenzisa amamephu omlando wokuncipha, futhi sisebenzise ukujika okukhanyayo kuphela lapho izindawo zokuvala ezibucayi zidinga i-Ra ≤ 0.4 µm. Akukho ukusebenza kabusha. Azikho izimanga. Ukuthobela iphasi yokuqala nje.
Ukulethwa komhlaba wangempela kuncike kokuthi kwenzekani ngaphambi kweshothi yokuqala. Sibuyekeze imidwebo engaphezu kwengu-1,200 elungele i-MIM kusukela ngo-2020—futhi sathola amaphuzu amathathu okuhluleka aphindelelayo: ama-undercuts adinga ama-electrode e-EDM sinker esikhundleni sensimbi evamile yokubunjwa, ukuguquguquka kokuqina kodonga okudlula isilinganiso esingu-3:1 (okubangela ukushwabana okuhlukile), kanye nezimbobo ezingaboni ukujula kuno-4× ububanzi (i-trapping binder). Ithimba lethu lonjiniyela lihlaba umkhosi lokhu ekubuyekezweni kwangaphambi kokukhiqiza—mahhala—futhi liphakamisa ama-tweaks ejiyomethri anciphisa izindleko ngo-22% ngokwesilinganiso. Iklayenti elilodwa lemishini yendawo kawoyela yaseNyakatho Melika lehlise isikhathi sokuhola sisuka emavikini ayi-14 saya emavikini angu-6.5 ngemva kokwamukela iluphu yempendulo ye-DFM.
Uma uhlelo lwakho lokusebenza ludinga ukuphindaphinda kuwo wonke amayunithi angu-5,000, ukungaguquguquki kwensimbi kuwo wonke amaqoqo angu-20, noma ukuqinisekiswa kokusebenza okungaphezu kwe-ASTM B962, udinga okungaphezu kwefekthri yokubumba umjovo wensimbi. Udinga uzakwethu ophatha igremu ngalinye lengxubevange ye-cobalt njengezinsimbi ezilinganiselwe—futhi ulinganisa impumelelo hhayi emabhokisini athunyelwe, kodwa ngokwehluleka kwenkambu enguziro ngemva kwamahora okusebenza angu-10,000. QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD. yakha leso siqiniseko kuzo zonke izinyathelo zenqubo. Hhayi njengethiyori. Njengomkhuba wansuku zonke.
