Masinyaniseke, uninzi lwabafana bokuthengwa kwempahla kunye nezinye iinjineli ziphosa i-lump cast kunye ne-powder metallurgy (PM) kunye njengeenkqubo ezikufutshane ne-net-shape kwaye ziyibize ngokuba lusuku. Esi sisiqalo esifanelekileyo, kodwa siyaliphosa elona bali lokwenyani. Ukhetho alukho malunga nokumila nje; imalunga nohambo lwempahla ukusuka kwimfumba ekhululekileyo ukuya kwindawo eqinileyo, kunye nento eyenziwa yilo hambo kumphefumlo wayo-i-microstructure yayo, ukuxinana, kunye nesilingi yokusebenza. Ndibone iiprojekthi ziphazamisekile ngenxa yokuba umntu unyanzelise i-PM ngenxalenye ekhalela utyalo-mali, okanye ngokuphambeneyo, ukusukela i-spec sheet ngaphandle kokuqonda inkqubo ye-DNA.
Umahluko ongundoqo: Ulwelo vs
Le yifolokhwe esisiseko endleleni. Iyaphosa imalunga nokuqina okulawulwayo. Uthatha imathiriyeli, uyinyibilikise ibe lulwelo, kwaye ugalele emngxunyeni. Umlingo—kunye nentloko ebuhlungu—kwenzeka xa kubanda. Ulwakhiwo lweenkozo, i-shrinkage porosity, ukwahlulwa kwezinto ezixutywayo: zonke zilawulwa yindlela olawula ngayo utshintsho lwe-liquid-to-solid. Ngotyalo-mali, esiqhube iintaba zamacandelo kwivenkile yethu, usilwa imfazwe nesiphithiphithi ngexesha lokugalela kunye nokondla ukushwabana kuyo yonke indlela kwiqokobhe leceramic elintsonkothileyo. Ngumdaniso one-thermodynamics ngexesha lokwenyani.
I-metallurgy yomgubo, kwelinye icala, itsiba inqanaba lolwelo ngokupheleleyo (i-sintering ecaleni, kodwa luhlobo olwahlukileyo lobushushu). Udibanisa umgubo wentsimbi eqinileyo kwidayiti kwaye emva koko uyifudumeze ukuze udibanise amasuntswana. Inzuzo kukungaguquguquki okumangalisayo kunye nokukwazi ukwenza ialloys ongenakukwazi ukunyibilika ngokulula kwaye uphose, njengee-tungsten composites ezithile. Kodwa isithende se-Achilles yi-porosity yendalo. Olo nxibelelwano lwe-voids encinci lunciphisa i-ductility kunye nobomi bokudinwa. Ungacinezela i-isostatic-press (HIP) ukuya kuxinaniso olupheleleyo, kodwa ngoku iindleko zakho zinkqonkqoza kucango lwe-forging. Ngumdlalo wokurhweba.
Ndikhumbula icandelo levalvu yecandelo leoli negesi. Umzobo wokuqala womxhasi uchaze i-PM ngokunyamezelwa kwayo kwimijelo ekhohlisayo yangaphandle. Kodwa le nxalenye yayinamacandelo anodonga olucekethekileyo kwaye kwakufuneka imelane nokudinwa okuphezulu. Sabuya umva, sacebisa ukuba sitshintshe iqokobhe ngundo ukuphosa nge-alloy esekwe kwi-cobalt, ilandelwa bubuchwephesha be-CNC bokuchaneka kwezo grooves zibalulekileyo. Ukungunda kweqokobhe kusinike umphezulu ocolekileyo wokugqiba kunye neepropathi ze-isotropic ngaphezulu kwesanti eqhelekileyo, kwaye ukutsiba umba we-porosity yayingeyonto ithethwayo yokudinwa. Bavavanya bobabini. Icandelo elifakwe ngoomatshini ligqithise iprototype ye-PM ngenqaku lesithathu kuvavanyo lokukhathala. Sifunda ntoni? Ukunyamezela kungenziwa ngoomatshini kwi; ingqibelelo yezinto ezisisiseko kaninzi ayinako.
Izinto ezibonakalayo: Ayiyiyo yonke into ehambayo okanye ehlangeneyo
Iphalethi yakho yezinto eziphathekayo iyalela indlela yakho yenkqubo, ngamanye amaxesha ngokungenalusini. Nge QSY, sihlala sigalela yonke into ukusuka kwi-ductile iron ukuya kwi-nickel-based superalloys njenge-Inconel 718. Ezi ngxubevange eziphezulu zinobumanzi obubi; badangele kwaye bathanda ukungahambi kakuhle kumacandelo amancinci. Ukuwagalela kufuna imingundo efudunyeziweyo kwaye kaninzi ivacuum okanye uncedo loxinzelelo. Awunakukwazi ukudibanisa uninzi lwale kwifom yomgubo kwaye ufumane indawo enokusetyenziswa-izinto ezidibeneyo azidlali kakuhle ngexesha le-atomization yomgubo okanye ukudibanisa.
Ngokwahlukileyo, i-PM yinkosi yezixhobo ze-porous (cinga ii-self-lubricating bearings) kunye nokuhlanganisa iintsimbi eziphikisayo. Ukuzama ukuphosa inxalenye nge-20% ye-volumetric porosity ehambelanayo yokugcinwa kweoli yinto ebuhlungu. Kodwa nge-PM, ulawula nje uxinzelelo lokudibanisa kunye nomjikelo we-sintering. Intle kakhulu loo mfuno ikhethekileyo. Siye sabuza kanye nge-molybdenum crucible. Ukuphosa i-molybdenum? Phantse akunakwenzeka ngenxa yendawo yokunyibilika kakhulu kunye nokuthambekela kwe-oxidation. I-PM ibiyeyona ndlela isebenzayo, kwaye kuye kwafuneka siyale iprojekthi njengoko ibingaphandle kwethu ukuphosa kunye nomatshini indlela. Ukwazi imida yevenkile yakho kubaluleke njengokwazi iinkqubo.
Emva koko kukho ibali elilahliweyo. Iyaphosa ivelisa i-sprue, iimbaleki, kunye nokunyuka-ngamanye amaxesha ubunzima besivuno bungaphantsi kwesiqingatha sobunzima obugalelwe. Iyakwazi ukurisayikilishwa, kodwa inamandla e-remelt. I-PM izidla ngokumalunga ne-97% yokusetyenziswa kwemathiriyeli; usebenzisa nje umgubo owufunayo. Leyo yindleko enkulu yomqhubi wezinto ezibizayo njengentsimbi yesixhobo okanye ii-superalloys. Kodwa loo mgubo ngokwawo ubiza kakhulu ngekhilogram enye kune-ingot stock. I-economic crossover point yinjongo ehambayo esekelwe kwindleko yezinto eziphathekayo kunye nenxalenye yejometri.
Ukuxhawula iMachining: Apho uninzi lwaMalungu achazwa ngokwenene
Apha kulapho isithembiso sobume obusondeleyo-net sidibana nevili lokusila lenyani. Zimbalwa kakhulu iindawo ezisasisiweyo okanye ze-PM ziyimilo yokwenyani yojongano olubalulekileyo. Basoloko befuna a CNC Machining gqiba. Kwaye ukuba oomatshini bahluke njani kwihlabathi.
Utyalo-mali olusemgangathweni olulungileyo kwi-17-4PH engenasici inokuba ne-0.5mm ukuya kwi-1mm yesitokhwe kwindawo yokutywina. Isebenza kakuhle, ngokuqikelelwa kwangaphambili. Ingxenye ye-PM yejometri efanayo, nangona emva kokuhlambalaza, ingaba yi-abrasive kwaye ayihambelani. Ezo pores zincinci zisebenza njenge-voids encinci etyhola umphetho wesixhobo sakho sokusika. Ufumana ubungakanani obuhle, kodwa ubomi bakho besixhobo buyehla. Kuye kwafuneka ukuba siphuhlise isondlo/isantya seprothokholi esahluke ngokupheleleyo kwaye sisebenzise into epholileyo epholileyo kumalungu adityanisiweyo ngokuchasene nezithuba ezivaliweyo. Iindleko zasemva kokulungiswa zingacima ugcino lwangaphambili olusuka kwi-PM ukuba alufakwanga kwangethuba.
Kwaye masithethe ngeziphene. Isiphako sokuphosa-i-shrinkage cavity, ukubandakanywa kwesanti-ngokuqhelekileyo i-macroscopic. Ungayibona nge-PT okanye nge-RT. Isiphene se-PM sihlala singabonakali: i-gradient yoxinaniso, indawo encinci ye-carbon-depleted ukusuka kwi-sintering atmosphere. Isenokuvela kuphela phantsi kwemicrograph okanye ibangele ukuba inxalenye ethile ingaphumeleli kuvavanyo loxinzelelo oluphezulu. Iiparadigms zokulawula umgangatho zihluke. Kumalungu abalulekileyo aguqukayo, sihlala sinyanzelisa uhlolo lweradiyographic for castings, ngelixa kumacandelo e-PM, sinokucacisa uvavanyo loxinaniso lwebhetshi kunye nohlalutyo lwe-microstructural.
Ukulingana kweendleko: Ayisoze yalula
I-Tooling ngumahluli wokuqala omkhulu. Utyalo-mali oluntsonkothileyo lokuphosa ukungunda, ngakumbi iqokobhe ngundo ukuphosa, kuyabiza. Wakha idayi yepateni yewax, ke iqokobhe ngalinye leceramic liyinto etyiwayo. Kwimiqulu ephantsi, ikhohlakele. I-PM tooling-i-compaction dies-iyintsimbi eqinile kwaye inokubiza kakhulu, kodwa ukhupha iinxalenye zamashumi amawaka emijikelezo. Umthamo wokuqhawula ungundoqo. Kubaleka ngaphantsi kwama-5000 amaqhekeza, ukuphosa kuhlala kuphumelela kwiindleko zezixhobo. Ngaphezulu kwe-50,000, i-PM iqala ukubonakala ingenakunqandwa, ibonelele ngezinto eziphathekayo kunye nomsebenzi wokusebenza.
Kodwa linda, kukho i-nuance. Kuthekani ukuba inxalenye yakho ine-undercut? Undoqo wecala ekubumbeni okubunjiweyo uyalawuleka. I-side-action kwi-PM compaction die iyinkimbinkimbi, ikhawulela i-ejection yenxalenye, kwaye iqhuba iindleko zezixhobo ngokusebenzisa uphahla. Ngequbuliso, kwelo candelo lintsonkothileyo ngokwejiyometri, ixabiso lokubumba ngokwenxalenye nganye linokuba sezantsi kunesixhobo se-astronomical se-PM, nakwimithamo ephezulu. Ndikhe ndahlala kwiintlanganiso zoyilo-lokwenza-ukwenziwa apho siye sabhengeza ingcebiso kathathu njengoko uyilo lulungisa into enye.
Ixesha lokukhokela lelinye iindleko ezithe cwaka. Inkqubo yokuphosa, ukusuka kwisikhunta ukuya kwinqaku lokuqala, inokukhawuleza ngokukhawuleza-iiveki ezimbalwa. Ukukhangela umgubo wesinyithi ochanekileyo, ngakumbi kwi-alloy yesiko, unokuba nexesha elihamba phambili leenyanga. Ngexesha lonikezelo lwe-crunches kwiminyaka embalwa edlulileyo, siye sabuyisela abathengi kwi-casting kuba sinokufumana i-316L isitokhwe sebha esingenasici ukuze silungiswe xa umgubo we-316L une-backlog yeeveki ezingama-26. Ukuthembeka kwemicimbi yokubonelela.
Ukucinga ngeHybrid kunye nekamva eliqaqambileyo
Olona phuhliso lunomdla alukho kwi-cast ecocekileyo okanye i-PM ecocekileyo, kodwa kwindawo engwevu. I-Metal Injection Molding (MIM), eyona nto i-PM enesibophelelo seplastiki, ibiwa isabelo kwizinto ezincinci, eziyinkimbinkimbi zotyalo-mali. Ibonelela ngokugqitywa komphezulu ongcono kunye neenkcukacha kune-PM yendabuko. Kwelinye icala, uneenkqubo zokuphoswa kwe-HIP apho uthatha utyalo-mali kwaye ushushu-isostatic-ucinezele ukuphelisa i-microporosity, ikunika ukuphosa ijometri ngoxinaniso olufana nolwakhe. Siye sazama ngale nto kwezinye iinxalenye eziphezulu ze-injini yeinjini ialloys esekwe nickel. Iziphumo ziyamangalisa, kodwa iindleko zezohlahlo lwabiwo-mali lwe-aerospace, kungekhona iimoto.
Emva koko kukho ijetting ye-binder kunye nezinye iindlela zokwenza ezongezelelweyo. Abanye bayibiza ngokuba yi-PM ekufutshane. Usaxuba umgubo, kodwa umaleko ngokomaleko ungafiyo. Kwiprototypes enye okanye indawo yelifa apho iindleko zezixhobo zibulala iprojekthi, ngumtshintshi-mdlalo. Kodwa kwimiqulu yemveliso engaphezulu kwamakhulu ambalwa, isantya kunye nexabiso lenxalenye nganye ayinakuchukumisa iinkqubo zemveli. Iyahambelana, ayikabikho endaweni yayo.
Ukujonga emva kwiminyaka engamashumi amathathu, umkhwa awuyonkqubo enye yokuphumelela. Imalunga nomdlalo wokudibanisa ophucukileyo. Indima yengcali efana Qingdao Qiangsenyuan Technology Co., Ltd. (QSY) asikokunika nje iqokobhe ngundo okanye utyalo mali kunye noomatshini. Kukuqonda ukuba unxantathu wepropathi yezinto eziphathekayo nzulu ngokwaneleyo ukukhokela ukhetho ukusuka kwinqanaba le-blueprint. Ngamanye amaxesha impendulo echanekileyo kukuphosa okuphezulu kwentembeko. Ngamanye amaxesha yinxalenye ye-PM echanekileyo. Rhoqo, kukwazi ukuba yeyiphi na engeyiyo, kwaye unamava-kunye neziva zokusilela okudlulileyo-ukwenza loo mnxeba phambi kokuba isinyithi sigalelwe okanye umgubo udityaniswe.
