Puas yog tag nrho cov hlau 3D luam tawm yuav tsum tau kho cua sov?

1. Lub luag haujlwm tseem ceeb ntawm kev kho cua sov yog tshem tawm qhov tsis zoo thiab ua kom cov khoom ua haujlwm zoo dua.
Cov txheej txheem cua sov, rwb thaiv tsev, thiab cua txias tuaj yeem txhim kho microstructure ntawm hlau 3D luam tawm los ntawm kev kho cua sov. Qhov no ua rau cov khoom ua haujlwm zoo tag nrho.
Tshem tawm cov kev ntxhov siab uas seem: Tsis sib npaug ntawm qhov txias thiab khov thaum luam ntawv tuaj yeem ua rau muaj kev ntxhov siab nyob hauv cov khoom, uas tuaj yeem ua rau lawv khoov lossis tawg. Kev ua kom txias qeeb thoob plaws hauv cov txheej txheem annealing tuaj yeem pab daws kev ntxhov siab. Tom qab annealing, piv txwv li, qhov kev ntxhov siab txo tus nqi ntawm aerospace cov qauv yuav yog ntau tshaj 80%.
Txhim kho cov khoom siv kho tshuab: quenching thiab tempering ua ke tuaj yeem ua rau tej yam nyuaj thiab muaj zog. Piv txwv li, tom qab quenching, 316L stainless hlau yog 30% nyuaj thiab hnav ntau dua, ua rau nws zoo rau cov khoom siv uas yuav tsum tau nqa ntau qhov hnyav.
Grain refinement: Cov txheej txheem recrystallization kev taw qhia tswj cov thermal gradient kom fuse cov nplej me me rau hauv cov kab nrib pleb. Qhov no ua rau cov khoom zoo tuaj yeem tiv taus creep ntawm qhov kub thiab txias. MIT kev tshawb fawb qhia tias tom qab kev kho recrystallization kev taw qhia, cov qoob loo loj ntawm nickel-raws li siab- kub alloys loj hlob los ntawm ntau qhov kev txiav txim ntawm qhov loj, thiab lub neej nkag mus ntev dua.
Kev kho mob rau densification: Kub isostatic nias (HIP) tshem tawm ntawm qhov pores los ntawm kev siv qhov kub thiab txias. Qhov no ua rau cov khoom ntom ntom yuav luag 100%. Piv txwv li, HIP kev kho mob tau txhim kho lub voj voog qis qis ntawm lub turbine discs hauv cov tshuab dav hlau los ntawm 5000 mus rau 20000 cycles.
2. Cov xwm txheej tsis muaj kev kho cua sov: txhim kho cov yam ntxwv ntawm cov khoom thiab cov txheej txheem
Txawm hais tias kev kho cua sov muaj txiaj ntsig ntau, cov khoom siv tuaj yeem siv tam sim ntawd yam tsis muaj kev ua haujlwm ntxiv hauv cov xwm txheej hauv qab no:
Cov khoom uas tsis xav tau kev ntxhov siab ntau: Yog tias cov qauv ntawm cov qauv yog qhov yooj yim, qhov loj me me, thiab nws tsis mob siab rau cov kev ntxhov siab, koj tsis tas yuav anneal nws. Piv txwv li, cov hniav me me los yog tsis yog -load- cov kabmob cov qauv tsis zoo li yuav cuam tshuam thiab tsis ua rau kev kho cua sov tsim nyog rau cov nyiaj.
Kev sib txawv ntawm cov ntaub ntawv thiab cov txheej txheem: Qee cov ntaub ntawv tau tsim microstructures zoo meej thaum luam tawm. Piv txwv li, cov txheej txheem electron beam selective melting (EBSM) cools down qeeb qeeb, uas txhais tau hais tias titanium alloy (Ti6Al4V) cov khoom luam tawm tsis tau ntxhib, uas yog qhov zoo rau kev cog qoob loo vim tias lawv yuav tsum tau biocompatible.
Scenario rau kev saib xyuas qhov zoo ntawm qhov chaw: Yog hais tias qhov chaw yuav tsum du heev, kev kho cua sov tuaj yeem ua rau oxidize lossis hloov cov duab. Nyob rau ntawm lub sijhawm no, kev kho cua sov tuaj yeem hloov tau los ntawm txoj kev kho saum npoo nrog rau cov tshuaj polishing thiab laser polishing. Tom qab electrochemical polishing, nto roughness ntawm ntxeem tau titanium alloy implants poob los ntawm 6-12 μm mus rau 0.2-1 μm yam tsis tas yuav muaj kev kho cua sov ntxiv.
Kev txheeb xyuas ntawm kev tsim qauv sai: kev kho cua sov tuaj yeem ua rau lub voj voog kev loj hlob ntev ntawm cov khoom tsim qauv. Piv txwv li, kev sib koom ua ke yooj yim pob khawm nyob rau hauv cov neeg siv khoom siv hluav taws xob hauv cheeb tsam xav tau nws cov qauv qauv ua kom sai, thiab siv cov khoom luam tawm ncaj qha tuaj yeem ua kom tiav cov txheej txheem pov thawj.
3. Lub hauv paus rau kev txiav txim siab: Nrhiav qhov sib npaug ntawm kev ua tau zoo, tus nqi, thiab kev ua haujlwm zoo
Ua tib zoo saib ntawm cov kev hloov pauv hauv qab no yog xav tau los txiav txim siab seb puas yuav kho cua sov:
Cov kev xav tau ua haujlwm: Aerospace qhov chaw yuav tsum muaj peev xwm tswj tau qhov kub thiab txias, uas yog vim li cas kev kho cua sov yog qhov tseem ceeb.
Kev kho mob cog yuav tsum muaj zog thiab muaj kev nyab xeeb rau lub cev, thiab kev kho mob los yog HIP tuaj yeem pab lawv ua haujlwm zoo dua.
Yog tias tsuas yog qhov tseem ceeb yog yuav ua li cas cov duab kos duab lossis cov duab tso saib, kev kho cua sov tuaj yeem hla kom txuag tau nyiaj.
Nickel-raws li siab- kub alloys yuav ua rau tawg, yog li lawv xav tau kev daws teeb meem thiab kev laus kho kom lawv tawv dua.
Cov khoom ua los ntawm aluminium alloy (xws li AlSi10Mg) muaj cov khoom siv microscopic, uas ua rau lawv lub teeb tam sim ntawd.
Hom txheej txheem: Cov txheej txheem hmoov txaj melting (PBF) yuav tsum tau muab tshem tawm vim nws txias sai sai thiab tawm ntau qhov nro tom qab.
Vim tias nws muaj cov khoom siv hluav taws xob siab thiab kev ntxhov siab tsawg, cov txheej txheem qhia lub zog tso tawm (DED) txo qis qhov xav tau kev kho cua sov.
Tus nqi txwv: HIP cov cuab yeej kim kim yuav thiab khiav, uas ua rau nws nyuaj rau cov lag luam me thiab nruab nrab -cov lag luam me me kom them taus. Lawv yuav tsum nrhiav kev sib haum xeeb ntawm kev ua haujlwm thiab tus nqi.
Kev kho cua sov ntawm cov txheej txheem nyuaj yuav ua rau lawv hloov cov duab. Txhawm rau zam qhov no, simulation optimization yuav tsum tau siv los txhawb kev tsim thiab nce kev tshawb fawb thiab kev tsim kho kev siv nyiaj.