Hauv kev lag luam sintered hlau, kev txiav zoo yog qhov tseem ceeb rau cov khoom kawg qhov kev ua tau zoo. Ntawm ntau txoj kev txiav, laser txiav sawv tawm rau nws qhov siab precision, tsis yog -kev sib cuag, thiab yoog raws.
Txawm li cas los xij, thaum txiav cov khoom siv hlau ntxeem tau xws li titanium lossis npib tsib xee, ib txwm siv txuas ntxiv -wave lasers yog qhov ua rau muaj cua sov ntau dhau, ua rau ntug melting, rov tsim txheej txheej, thiab txawm tias pore blockage. Qhov no cuam tshuam rau cov khoom permeability, catalytic kev ua, los yog pom efficiency.
Kab lus no delves rau hauv cov txheej txheem laser qib siab thiab thev naus laus zis uas tsim los daws qhov kev sib tw no.
1. Cov hauv paus hniav: Vim li cas Edge Melting tshwm sim?
To taub qhov laj thawj yog qhov tseem ceeb rau kev nrhiav kev daws teeb meem. Lub ntsiab ntawm ntug melting yog "overheating."
Thaum tshav kub kub cuam tshuam: Hlau xav tau muaj cov fibers sib txuas. Txawm hais tias nws cov thermal conductivity zoo dua li cov ntaub ntawv polymer, nws peb - cov qauv ntxeem tau ua rau muaj kev kub ntxhov tsis tu ncua thiab muaj peev xwm qis dua piv rau cov ntawv hlau. Lub zog txuas ntxiv los ntawm CW laser ua rau cov cua sov tuaj yeem ua rau hauv cheeb tsam txiav - dhau ntawm cov khoom siv lub ntsiab lus melting - ua ntej nws tuaj yeem tawg mus rau hauv cov khoom loj.
Cov yam ntxwv ntawm cov khoom: titanium thiab npib tsib xee yog ob qho tib si reactive hlau, nrog titanium muaj affinity siab rau oxygen thiab nitrogen. Thaum qhov kub thiab txias, cov npoo txiav tau oxidation thiab nitridation, tsim cov txheej tawv tawv thiab tawv tawv. Qhov no yog nrog los ntawm re-solidification ntawm cov khoom molten, uas rhuav tshem cov qauv fiber ntau thiab porosity.
2. Kev daws: Kev Siv Tshuab Leap ntawm "Nruam" mus rau "Pulsed"
Lub hauv paus ntsiab lus tseem ceeb yog txo qis tag nrho cov cua sov tawm thiab muab "lub sijhawm txias" txaus rau cov khoom siv. Qhov no feem ntau ua tiav los ntawm ob lub thev naus laus zis tseem ceeb:
► 1. Txais Siv Pulsed Fiber Lasers - Cov Txheej Txheem Txheej Txheem
Tsis zoo li tas mus li -wave lasers, pulsed lasers emit "laser pulses" ntawm cov zaus siab heev thiab lub sijhawm luv luv (nanosecond, picosecond, lossis txawm tias qib femtosecond). Txhua lub pulse tsim ib qho me me ntawm ablation lossis vaporization, thaum lub sijhawm nruab nrab ntawm pulses, cov khoom txias txaus.
► 2. Optimizing Assist Gas - Ib qho tseem ceeb ntawm Synergistic Element
Pab roj ua lub luag haujlwm dual lub luag haujlwm hauv laser txiav: ejecting cov khoom molten thiab koom nrog cov tshuaj tiv thaiv. Kev xaiv cov pa roj yog qhov tseem ceeb tshwj xeeb rau oxidation - cov ntaub ntawv yooj yim xws li titanium thiab nickel xav.
Kev xaiv zoo tshaj: High-Purity Inert Gases (xws li Argon, Ar)
Muaj nuj nqi: Tsim kom muaj kev tiv thaiv ib puag ncig, zoo cais cov ntug txiav ntawm cov pa oxygen thiab nitrogen kom tiv thaiv cov tshuaj tiv thaiv ntawm qhov kub thiab txias. Ib txhij, lub siab - roj ntws sai sai tshem tawm cov khoom vaporized los yog tsawg kawg molten ntawm lub kerf, tiv thaiv nws re-deposition thiab solidification ntawm cov npoo fiber ntau.
Siv ceev faj: Oxygen / Compressed Cua
Thaum cov pa oxygen ntawm cov pa roj carbon steel nce ceev los ntawm cov tshuaj tiv thaiv exothermic, rau titanium thiab npib tsib xee, nws ua rau oxidation hnyav ntawm qhov txiav ntug, tsim ib txheej tuab, brittle oxide txheej nrog rau qhov tseem ceeb melting, thiab yuav tsum nruj me ntsis zam.
3. Cov txheej txheem tseem ceeb Parameter Control: Ua tiav Precision "Microsurgery"
Txawm hais tias nrog lub laser pulsed thiab inert gas, parameter nqis yog cov kauj ruam kawg txiav txim siab ua tiav.
►Peak Fais Fab & Pulse Frequency: Lub zog siab dua ua kom cov khoom siv vaporization zoo, thaum lub sijhawm pulse haum (tsis tas yuav siab dua) yuav tsum sib phim qhov kev txiav ceev kom paub meej lub sijhawm txias txaus rau txhua tus mem tes.
► Txiav ceev: qeeb qeeb ua rau muaj cua sov ntau dhau; ceev heev yuav ua rau tsis tiav txiav los yog ntxhib npoo. Lub hom phiaj yog siv qhov ceev tshaj plaws thaum ua kom tiav kev nkag mus.
►Focal Position: Precisely ua kom pom tseeb ntawm lossis me ntsis hauv cov khoom nto kom ua tiav qhov chaw me me thiab lub zog siab tshaj plaws rau kev txiav kom zoo.
►Nozzle & Gas Flow Rate: Xaiv ib txoj kab uas hla uas tsim nyog thiab xyuas kom muaj qhov txaus, ruaj khov ntawm siab -purity inert gas los tsim cov ntaub thaiv tiv thaiv zoo thiab muaj peev xwm ejection zoo.
