Cov txiaj ntsig ntawm kev siv cov hmoov hlau hauv kev ua hlau
Kev siv cov hmoov hlau yog ib qho ntawm cov kev tsim kho tshiab tseem ceeb hauv ntiaj teb ntawm cov hlau niaj hnub no. Txawv ntawm cov txheej txheem tsim hlau ib txwm muaj uas feem ntau pib los ntawm cov ingots, billets, lossis daim ntawv, hmoov metallurgy (PM) siv cov hlau me me ua cov khoom pib, tom qab ntawd ua tiav los ntawm cov theem ntawm kev sib tov, compaction, thiab cua sov (sintering) los tsim cov khoom khov. Hauv nws txoj kev loj hlob, hmoov hlau tsis yog tsuas yog siv rau cov hmoov metallurgy ib txwm muaj, tab sis kuj rau cov txheej txheem siab heev xws li kev txhaj tshuaj hlau (MIM), thermal txheej, thiab kev tsim khoom ntxiv (3D hlau luam ntawv).
Tsab xov xwm no tham txog cov txiaj ntsig tseem ceeb ntawm kev siv cov hmoov hlau hauv metallurgy, ob qho tib si los ntawm kev siv tshuab, kev lag luam, qhov zoo thiab kev ruaj khov, nrog rau cov piv txwv ntawm lawv daim ntawv thov hauv kev lag luam.
1. Kev Siv Khoom Zoo thiab Kev Pov Tseg Tsawg Kawg Nkaus
Ib qho ntawm cov txiaj ntsig zoo tshaj plaws ntawm cov hmoov hlau yog nws txoj kev siv cov khoom siv tau zoo. Hauv cov txheej txheem tsim khoom ib txwm muaj - piv txwv li, kev siv lub tshuab ua cov hlau - ntau cov khoom siv raug pov tseg ua cov chips. Hmoov hlau ua rau muaj lub tswv yim ntawm kev tsim cov duab ze-net, uas cuam tshuam nrog kev tsim cov khoom ze rau lawv cov duab kawg, txo qhov xav tau kev siv tshuab ntxiv.
Yog li ntawd:
- Cov khib nyiab tsawg dua
- Cov nqi khoom siv raw tuaj yeem txo qis
- Lub sijhawm ua tiav tiav raug txo qis
- Kev tsim khoom ntau ntxiv yog nce ntxiv
Qhov kev ua tau zoo no tseem ceeb heev rau cov ntaub ntawv kim xws li titanium, nickel-based superalloys, lossis cobalt-chromium alloys.
2. Muaj peev xwm tsim cov qauv geometry nyuaj
Cov hmoov hlau qhib qhov ua tau los tsim cov duab uas nyuaj lossis tsis yooj yim sua nrog kev casting lossis forging ib txwm muaj. Los ntawm cov thev naus laus zis xws li MIM thiab kev tsim khoom ntxiv, cov chaw tsim khoom tuaj yeem tsim cov khoom nrog cov ntsiab lus me me, cov qhov hauv, cov kav dej txias, lossis cov yam ntxwv me me.
Contohnya:
- Cov iav me me nrog cov qauv meej
- Cov khoom siv kho mob xws li cov brackets orthodontic lossis cov implants uas muaj qhov porous
- Cov khoom siv nozzle thiab turbine nrog cov channel txias sab hauv
- Cov khoom siv tsheb nrog daim ntawv compact thiab kev koom ua ke ua haujlwm
Lub peev xwm no los tsim cov qauv geometries nyuaj txo cov naj npawb ntawm cov khoom uas yuav tsum tau sib sau ua ke, yog li ua rau cov khoom ntseeg tau ntau dua thiab txo cov nqi sib dhos.
3. Kev Tswj Xyuas Cov Khoom Siv thiab Cov Khoom
Cov hmoov hlau muaj kev ywj pheej zoo heev hauv kev hloov kho cov khoom sib xyaw. Los ntawm kev sib xyaw cov hmoov ntawm ntau yam khoom lossis cov hlau sib xyaw, cov kws ua haujlwm tuaj yeem tsim cov ntaub ntawv nrog cov yam ntxwv tshwj xeeb dua rau cov kev xav tau tshwj xeeb.
Cov txiaj ntsig muaj xws li:
- Kev tsim cov hlau tshwj xeeb uas nyuaj rau tsim los ntawm kev yaj ib txwm muaj
- Kev tswj hwm kev faib khoom ntawm cov khoom sib xyaw ua ke ntau dua
- Yooj yim ntxiv cov khoom ntxiv xws li graphite, lubricants, lossis cov khoom ua kom cov khoom me me
- Muaj peev xwm tsim cov khoom siv sib xyaw ua los ntawm hlau (hlau matrix composites)
Piv txwv li, cov khoom siv hlau tuaj yeem sib xyaw nrog graphite los txhim kho kev ua kom lubrication thiab kev hnav tsis kam, lossis qee cov khoom sib xyaw tuaj yeem ntxiv rau kom muaj zog tom qab sintering.
4. Cov Khoom Siv Kho Tshuab thiab Cov Khoom Siv Ua Haujlwm
Txawm hais tias qhov porosity yeej ib txwm phem, hauv cov hmoov metallurgy, porosity tuaj yeem hloov kho kom ua tiav cov haujlwm tshwj xeeb. Los ntawm kev tswj qhov loj me ntawm cov khoom me me, lub zog nias, thiab cov kev teeb tsa sintering, qib ceev tuaj yeem hloov kho.
Cov txiaj ntsig tuaj yeem yog:
- Cov khoom sib dua nrog lub zog txaus
- Cov qauv porous rau kev lim dej lossis kev nqus zog
- Cov kabmob sintered uas muaj qhov ntxeem tau uas tuaj yeem khaws cov roj nplua nyeem (cov kabmob self-lubricating)
- Cov khoom siv nrog kev co zoo dua (damping)
Hauv ntau daim ntawv thov kev lag luam, cov txiaj ntsig zoo no muaj txiaj ntsig zoo vim tias lawv ua rau lub neej ntawm cov khoom siv ntev dua thiab txo cov kev xav tau txij nkawm.
5. Kev Sib Xws ntawm Qhov Loj thiab Kev Ua Tau Ntau Lawm
Hmoov metallurgy zoo tshaj plaws rau kev tsim cov khoom me me mus rau nruab nrab nrog kev kam rau siab sib xws. Cov txheej txheem compaction siv cov pwm precision tsim cov duab rov ua dua tau zoo heev. Tom qab sintering, cov khoom feem ntau xav tau me ntsis lossis tsis muaj kev ua haujlwm ntxiv.
Cov txiaj ntsig ntawm qhov kev ua kom raug no suav nrog:
- Kev tsim khoom siab rau cov ntim loj
- Kev hloov pauv me me ntawm cov khoom sib xyaw ua ke
- Qhov zoo ntawm qhov chaw ntawm qee yam nta
- Txo cov nqi tshuaj xyuas thiab kev ua haujlwm dua tshiab
Kev lag luam tsheb tau siv cov thev naus laus zis no ntev los tsim cov iav, sprockets, cams, thiab ntau yam khoom sib kis tau zoo.
6. Txuag Zog Rau Qee Cov Kev Siv
Txawm hais tias cov txheej txheem tsim cov hmoov hlau (piv txwv li, atomization) xav tau lub zog, feem ntau tag nrho cov txheej txheem tuaj yeem pheej yig dua li cov txheej txheem ib txwm muaj uas xav tau kev yaj tag nrho, kev tsim loj, thiab kev siv tshuab hnyav. Tshwj xeeb tshaj yog thaum cov khoom raug ua ze rau lawv cov duab kawg, lub zog ua haujlwm thiab lub zog uas xav tau los ua cov khoom seem tuaj yeem txo qis.
Tsis tas li ntawd xwb, vim tias sintering tshwm sim ntawm qhov kub qis dua qhov melting point (rau ntau yam khoom siv), kev siv zog tuaj yeem tswj tau ntau dua li kev casting tag nrho thiab melting, nyob ntawm cov khoom siv thiab qhov ntau lawm.
7. Yooj yim ntawm kev tsim cov khoom siv ua tau zoo
Cov hmoov hlau yog qhov tseem ceeb hauv kev tsim cov ntaub ntawv ua tau zoo, suav nrog:
- Superalloys rau cov roj turbines
- Titanium alloys rau aerospace thiab kev kho mob
- Qee cov hlau txhuas rau lub teeb tab sis muaj zog
- Cov khoom siv hlau nplaum tas mus li uas tsis tshua muaj nyob hauv ntiaj teb (piv txwv li NdFeB)
- Tungsten carbide thiab hlau tawv rau cov cuab yeej txiav
Qee cov ntaub ntawv no nyuaj rau ua tiav siv cov txheej txheem ib txwm muaj vim lawv cov ntsiab lus yaj siab, kev ua haujlwm tsis zoo, lossis kev txwv hauv kev ua tiav cov qauv me me uas xav tau. Nrog cov hmoov hlau, kev tswj hwm cov qauv me me (piv txwv li, qhov loj ntawm cov noob thiab kev sib xws) yooj yim dua.
8. Kev Txhawb Nqa Rau Kev Tsim Khoom Ntxiv (Kev Luam Ntawv Hlau 3D)
Nyob rau xyoo tas los no, cov hmoov hlau tau dhau los ua lub hauv paus ntawm cov thev naus laus zis tsim khoom ntxiv xws li SLM / DMLS (Selective Laser Melting / Direct Metal Laser Sintering) thiab EBM (Electron Beam Melting). Cov thev naus laus zis no ua rau muaj peev xwm tsim cov khoom sib dua, nyuaj, thiab muaj zog nrog lub sijhawm tsim khoom luv dua.
Cov txiaj ntsig tseem ceeb rau kev lag luam:
- Kev tsim qauv sai rau cov qauv tshiab
– Kev tsim cov khoom siv tshwj xeeb, piv txwv li cov khoom cog rau tus neeg mob tshwj xeeb
- Kev kho kom zoo dua ntawm Topology rau kev txo qhov hnyav
- Txo cov cuab yeej siv hauv qee qhov kev tsim khoom
Hauv lwm lo lus, hmoov hlau tsis yog tsuas yog txhim kho kev ua haujlwm zoo xwb, tab sis kuj nthuav qhov chaw rau kev tsim kho tshiab.
9. Txhawb Kev Ruaj Ntseg thiab Kev Rov Siv Dua
Los ntawm qhov kev pom ntawm kev ruaj khov, kev siv cov hmoov hlau muaj peev xwm txhawb nqa cov txheej txheem tsim khoom uas zoo rau ib puag ncig, vim yog:
- Cov khoom pov tseg tsawg dua
- Cov khoom seem thiab cov hmoov seem tuaj yeem rov ua dua tshiab (nrog kev tswj xyuas zoo)
- Txo cov kauj ruam ntawm cov txheej txheem thiab kev thauj mus los ntawm cov txheej txheem
- Cov khoom sib zog dua tuaj yeem txo qhov kev siv hluav taws xob thaum siv (piv txwv li hauv tsheb thiab dav hlau)
Tau kawg, kev ruaj khov tseem nyob ntawm tag nrho cov txheej txheem tsim khoom, suav nrog cov peev txheej hluav taws xob, kev ua hmoov zoo, thiab kev tswj hwm cov hmoov hlau.
10. Tej Yam Uas Yuav Tsum Tau Tswj
Txawm hais tias nws muaj txiaj ntsig zoo los xij, kev siv cov hmoov hlau kuj muaj cov teeb meem uas yuav tsum tau tswj hwm nrog kev qhuab qhia txog kev nyab xeeb ntawm hlau thiab kev ua haujlwm, xws li:
– Kev pheej hmoo ntawm cov hmoov hlau (ua rau qee yam hlau kub hnyiab xws li txhuas thiab titanium)
- Kev ua qias tuaj ntawm cov pa oxygen/moisture uas tuaj yeem txo qhov zoo ntawm sintering
- Kev hloov pauv ntawm qhov loj me ntawm cov khoom me me cuam tshuam rau kev ntws thiab qhov ceev
- Tus nqi ntawm cov hmoov zoo tuaj yeem kim heev, tshwj xeeb tshaj yog rau AM thiab aerospace.
Txawm li cas los xij, nrog kev tswj cov txheej txheem zoo (piv txwv li kev khaws cia tsis siv neeg, kev sib xyaw, kev txheeb xyuas hmoov, thiab cov txheej txheem OHS nruj), cov teeb meem no tuaj yeem txo qis.
Xaus
Cov hmoov hlau muaj cov txiaj ntsig zoo hauv kev lag luam metallurgy: kev ua haujlwm zoo ntawm cov khoom siv, lub peev xwm los tsim cov qauv geometries nyuaj, kev tswj hwm cov khoom sib xyaw thiab cov khoom, kev tsim khoom ntau, thiab kev txhawb nqa rau cov thev naus laus zis niaj hnub xws li hlau 3D luam ntawv. Nrog rau cov txiaj ntsig no, hmoov metallurgy tam sim no yog lub hauv paus tseem ceeb rau kev lag luam tsheb, aerospace, kev kho mob, lub zog, thiab kev tsim cov cuab yeej txiav.
Yav tom ntej, kev txhim kho hauv kev siv tshuab ua hmoov, kev tswj xyuas zoo, thiab kev siv cov qauv kev nyab xeeb yuav nthuav dav kev siv cov hmoov hlau, thaum ua kom muaj kev sib tw hauv kev lag luam los ntawm kev sib zog dua, muaj zog dua, meej dua, thiab ruaj khov dua.
Yog tias koj xav tau, kuv tuaj yeem ntxiv cov piv txwv ntawm cov ntaub ntawv tshawb fawb hauv kev lag luam (piv txwv li cov khoom siv hauv tsheb tshwj xeeb, cov khoom siv kho mob uas muaj qhov porous, lossis cov khoom siv turbine), lossis tsim cov ntawv xov xwm uas muaj cov ntaub ntawv qhia txog kev kawm ntxiv.
