Metallurgy hauv Micro Manufacturing
Kev tsim khoom me me yog ib qho chaw uas tsom mus rau kev tsim cov khoom me me heev - txij li kaum tawm micrometers mus rau ob peb millimeters - nrog kev raug siab thiab kev kam rau siab heev. Cov khoom xws li microgears, micro-nozzles, micro-pwm inserts, qhov me me hauv cov khoom siv kho mob, thiab microstructures hauv sensors thiab actuators yog cov piv txwv ntawm cov khoom yug los ntawm micromanufacturing. Tom qab kev vam meej ntawm cov txheej txheem no, metallurgy ua lub luag haujlwm tseem ceeb vim tias tus cwj pwm hlau ntawm microscale tsis zoo ib yam li ntawm macroscale. Cov khoom siv kho tshuab, microstructure, thiab cov lus teb ntawm cov ntaub ntawv rau kev ua haujlwm thiab kev tsim cov txheej txheem tuaj yeem hloov pauv ntau heev thaum qhov loj me ntawm cov yam ntxwv machined txo qis. Yog li ntawd, kev nkag siab metallurgy yog lub hauv paus tseem ceeb rau kev ua kom zoo, kev ntseeg siab, thiab kev ua haujlwm zoo.
Lub Luag Haujlwm ntawm Microstructure ntawm Micro Scale
Hauv metallurgy, microstructure hais txog qhov loj ntawm cov noob, kev faib tawm theem, nag lossis daus, thiab cov khoom siv lead ua tsis zoo uas pom tau hauv qab kev soj ntsuam me me. Hauv kev tsim khoom ib txwm muaj, qhov loj me ntawm cov khoom siv feem ntau loj dua li qhov loj ntawm cov noob, yog li cov teebmeem ntawm kev hloov pauv ntawm cov noob feem ntau yog "nruab nrab." Txawm li cas los xij, hauv micromanufacturing, qhov loj me ntawm cov yam ntxwv tshuab tuaj yeem sib piv rau qhov loj ntawm cov noob. Qhov no ua rau muaj qhov tshwm sim feem ntau hu ua qhov loj me, qhov twg cov khoom siv khoom raug cuam tshuam los ntawm qhov sib piv ntawm qhov loj me ntawm cov yam ntxwv rau qhov loj ntawm cov noob.
Piv txwv li, hauv cov txheej txheem micro-milling lossis micro-turning, qhov tuab ntawm cov chip tuaj yeem mus txog qhov loj ntawm cov noob. Qhov no ua rau muaj kev hloov pauv yas heterogeneous; ib lub noob yuav mos dua lossis tawv dua nyob ntawm nws qhov kev taw qhia siv lead ua. Yog li ntawd, cov zog txiav tsis ruaj khov, thiab qhov chaw machining tuaj yeem ua rau muaj kev hloov pauv roughness siab. Metallurgy pab xaiv cov ntaub ntawv nrog cov noob zoo, homogeneous rau kev ua haujlwm micro-machining ntau dua.
Cov Khoom Siv Kho Tshuab thiab Kev Ruaj Khoov ntawm Cov Cheebtsam Me me
Cov khoom me me feem ntau ua haujlwm nyob rau hauv cov xwm txheej nyuaj: siab siab hauv cov micro-nozzles, kev sib txhuam hauv microgears, lossis qhov chaw corrosive ntawm cov khoom siv kho mob. Ntawm qhov me me, kev ua tsis tiav ntawm cov khoom tuaj yeem tshwm sim vim yog qaug zog tawg, hnav, lossis tawg. Metallurgy ua lub luag haujlwm hauv kev tsim cov khoom sib xyaw thiab kev kho cua sov kom ua tiav kev sib xyaw ua ke ntawm lub zog, ductility, thiab hnav tsis kam.
Cov hlau tsis xeb Austenitic, cov hlau titanium, cov hlau nickel superalloys, thiab txawm tias cov hlau tooj liab feem ntau siv nyob ntawm qhov xav tau. Piv txwv li, titanium nrov hauv cov khoom siv kho mob vim nws qhov biocompatibility thiab corrosion tsis kam. Txawm li cas los xij, titanium paub tias yog "gummy," lossis yooj yim lo rau lub cuab yeej thaum lub sijhawm machining, ua rau kev tswj hwm microstructural, kev xaiv cuab yeej, thiab cov txheej txheem txheej txheem tseem ceeb. Qhov no yog qhov uas metallurgy thiab cov txheej txheem tsim khoom sib koom ua ke: metallurgy muab kev tswj hwm cov khoom siv, thaum cov txheej txheem tsim khoom hloov cov khoom siv mus rau hauv cov ntawv ua haujlwm.
Kev Kho Mob Kub thiab Kev Ruaj Ntseg ntawm Qhov Ntev
Kev kho cua sov xws li annealing, quenching, tempering, lossis aging yog siv los tswj qhov nyuaj thiab lub zog. Hauv micromanufacturing, kev kho cua sov yuav tsum xav txog qhov ruaj khov ntawm qhov ntev vim tias txawm tias qhov kev hloov me me tuaj yeem ua rau cov khoom poob tawm ntawm kev kam rau siab. Kev cuam tshuam vim quenching, piv txwv li, tuaj yeem ua rau muaj kev hloov pauv loj yog tias cov khoom nyias heev lossis muaj qhov geometry tsis ruaj khov.
Kev kawm txog hlau muab cov hau kev los txo qhov kev pheej hmoo no, piv txwv li los ntawm kev xaiv cov txheej txheem kho cua sov uas mos mos xws li kev kho cua sov hauv lub tshuab nqus tsev, siv cov khoom siv txias uas tswj tau, lossis siv kev txo kev ntxhov siab ua ntej ua tiav. Ntxiv mus, kev paub txog kev hloov pauv theem (piv txwv li, austenite mus rau martensite hauv hlau) yog qhov tseem ceeb rau kev kwv yees qhov hloov pauv ntim thiab kev ntxhov siab seem.
Hmoov Metallurgy thiab Micro-Forming
Kev siv hmoov hlau ua rau muaj ntau lub cib fim hauv kev tsim khoom me me vim nws tso cai rau cov duab nyuaj nrog cov khoom siv pov tseg tsawg kawg nkaus. Cov txheej txheem xws li kev txhaj tshuaj hmoov me me (micro-PIM) tuaj yeem tsim cov khoom me me hauv ntau qhov ntau, ua rau lawv haum rau kev lag luam hluav taws xob, tsheb, thiab cov khoom siv kho mob. Kev vam meej ntawm cov txheej txheem no nyob ntawm cov yam ntxwv ntawm cov hmoov: qhov loj me ntawm cov khoom me me, kev faib tawm qhov loj me, cov duab ntawm cov khoom me me, thiab kev huv.
Thaum lub sijhawm sintering, atomic diffusion ua rau cov khoom me me sib xyaw, txo qhov porosity thiab ua rau lub zog nce ntxiv. Txawm li cas los xij, sintering kuj ua rau shrinkage, uas yuav tsum tau kwv yees kom raug kom ua tiav qhov ntev kawg sib xws. Metallurgy ua lub luag haujlwm hauv kev ua kom zoo dua qhov nkhaus sintering, kev xaiv binder, thiab cov tswv yim debinding kom tiv thaiv cov khoom tawg lossis warping.
Tsis tas li ntawd xwb, cov txheej txheem microforming - kev ua cov yas ntawm qhov me me - kuj raug cuam tshuam los ntawm metallurgy. Cov ntaub ntawv uas muaj cov noob loj dhau tuaj yeem ua rau cov yas ntws tsis sib xws, ua rau cov duab kawg tsis meej. Los ntawm kev tsim cov noob loj los ntawm cov txheej txheem thermomechanical, cov ntaub ntawv tuaj yeem ua kom haum rau micro-stamping lossis micro-extrusion.
Cov Kev Sib Tw ntawm Micromachining thiab Kev Sib Cuam Tshuam ntawm Cov Khoom Siv thiab Cov Cuab Yeej
Hauv kev ua micromachining, lub vojvoog ntawm ntug cuab yeej feem ntau yog sib npaug rau qhov tuab ntawm cov chip. Yog li ntawd, cov txheej txheem txiav tuaj yeem hloov pauv ntawm kev txiav mus rau kev plowing, uas ua rau muaj cua sov ntau ntxiv, ua rau cov cuab yeej hnav sai dua, thiab ua rau qhov zoo ntawm qhov chaw poob qis. Metallurgy ua lub luag haujlwm hauv kev nkag siab txog qhov nyuaj ntawm cov khoom siv, kev ua haujlwm tawv, thiab kev ua kom sov cuam tshuam li cas rau qhov xwm txheej no.
Piv txwv li, cov hlau alloys uas yooj yim raug kev nyuaj siab tuaj yeem tawv sai sai ntawm qhov chaw thaum txiav, ua rau muaj zog txiav ntau dua thiab cov cuab yeej ua kom du sai dua. Cov kev daws teeb meem yuav suav nrog kev kho cua sov kom zoo dua, siv cov ntaub ntawv lwm yam, lossis siv cov txheej txheem cuab yeej tsim nyog xws li TiAlN lossis DLC, nyob ntawm cov khoom siv uas tab tom ua.
Kev Tsim Kho Nto: Kev Txheej Txheem thiab Kev Hloov Kho Me Me
Cov khoom me me feem ntau xav tau kev hnav thiab kev tiv taus xeb siab. Ib qho tswv yim uas siv ntau yog kev tsim kho saum npoo los ntawm kev siv cov txheej nyias nyias lossis kev kho saum npoo xws li nitriding, carburizing, PVD/CVD txheej, thiab anodizing. Ntawm qhov microscale, qhov tuab ntawm txheej yuav tsum tau tswj hwm kom nruj vim tias cov txheej tuab dhau tuaj yeem hloov qhov loj me ntawm cov yam ntxwv thiab ua rau cov khoom tsis ua haujlwm zoo.
Kev siv hlau pab xaiv cov khoom siv hauv paus thiab kev sib xyaw ua ke ntawm cov txheej txheem hais txog kev nplaum, cov coefficient ntawm kev nthuav dav thermal, thiab qhov muaj peev xwm tawg vim muaj kev ntxhov siab seem. Piv txwv li, cov txheej txheem tawv tuaj yeem txhim kho qhov kev tiv thaiv kev hnav ntawm microgears, tab sis yog tias nws tawg heev, nws tuaj yeem tawg thaum cov khoom raug kev thauj khoom cyclic.
Kev Tswj Xyuas Zoo ntawm Metallurgical: Los ntawm Microscope mus rau Metrology
Kev tsim khoom me me yuav tsum tau tswj xyuas zoo, tsis yog tsuas yog qhov loj me xwb tab sis kuj tseem ceeb rau cov qauv me me thiab cov qhov tsis zoo sab hauv. Cov txheej txheem metallurgical xws li metallography, SEM (scanning electron microscopy), EDS rau kev tshuaj xyuas cov khoom sib xyaw, thiab XRD rau kev txheeb xyuas theem yog qhov muaj txiaj ntsig zoo heev rau kev kuaj mob cov teeb meem tsim khoom. Cov qhov tsis zoo xws li porosity, inclusions, lossis compositional segregation uas tej zaum yuav tsis tseem ceeb hauv cov khoom loj tuaj yeem ua rau muaj kev puas tsuaj loj heev hauv cov khoom me me.
Tsis tas li ntawd xwb, kev sim tshuab me me, xws li nanoindentation, yog siv los kos duab qhov nyuaj hauv zos, tshuaj xyuas cov teebmeem ntawm kev kho cua sov, thiab ntsuas qhov sib xws ntawm cov khoom siv hauv thaj chaw me me. Cov ntaub ntawv no pab cov engineers xaiv cov txheej txheem tsim nyog thiab zam kev hloov pauv zoo.
Kev kaw
Kev siv hlau hauv kev tsim khoom me me tsis yog tsuas yog kev tshawb fawb txog hlau xwb; nws yog lub hauv paus rau kev ua kom ntseeg tau tias cov ntaub ntawv tuaj yeem tsim tau, txiav, sintered, thiab siv tau ntawm qhov me me heev. Microstructure, qhov loj ntawm cov noob, kev hloov pauv theem, kev kho cua sov, thiab kev tsim kho qhov chaw txhua yam cuam tshuam ncaj qha rau qhov tseeb thiab kev ua tau zoo ntawm cov khoom me me. Raws li cov khoom siv kho mob, khoom siv hluav taws xob, sensor, thiab kev lag luam thev naus laus zis hloov pauv, qhov xav tau rau cov khoom me me, kev ua tau zoo tsuas yog nce ntxiv. Yog li ntawd, kev koom ua ke ntawm metallurgy thiab micromanufacturing technologies yog qhov tseem ceeb rau kev tsim cov khoom meej, muaj zog, ruaj khov, thiab sib xws hauv kev tsim khoom loj.
Yog tias koj xav tau, kuv tuaj yeem hloov kho tsab xov xwm no kom muaj kev kawm ntau dua (nrog rau cov lus hais thiab cov ntaub ntawv sau), lossis nrov dua rau cov blogs / ntawv xov xwm hauv kev lag luam, thiab ntxiv cov ntaub ntawv tshawb fawb xws li micro-PIM ntawm cov hlau tsis xeb lossis micro-milling ntawm titanium.
