Stainless hlau nto laser tu tshuab tshawb fawb
Daim ntawv no qhia txog lub tswv yim thiab lub hauv paus ntsiab lus ntawm laser tu tshuab, thiab nws siv txoj kev sim los kawm txog cov nyhuv ntawm laser ntxuav ntawm stainless hlau nto. Qhov kev ntsuam xyuas qhia tau hais tias lub laser saum npoo tu tshuab tuaj yeem tshem tawm cov xim oxidation ntawm stainless hlau welds thiab tshav kub-cuam tshuam cheeb tsam nrog rau cov xim thiab xeb ntawm stainless hlau nto, thiab tuaj yeem tsim cov txheej txheem passivation tshiab.
Laser tu tshuab lub hauv paus ntsiab lus
Laser tu tshuab yog hais txog kev siv lub zog loj laser beam irradiation ua hauj lwm nto, thiaj li hais tias cov nto ntawm cov av, xeb me ntsis los yog coatings tshwm sim instantaneous evaporation los yog stripping, high-ceev zoo tshem tawm ntawm tu khoom nto adhesion los yog nto txheej, yog li ntawd. raws li kom ua tiav cov txheej txheem huv.
Lasers, ua ke nrog cov kab hluav taws xob hluav taws xob thiab cov kab hluav taws xob ion, tau sau ua ke hu ua cov kab hluav taws xob siab. Qhov zoo tshaj plaws yog tias cov kab teeb muaj lub zog loj kom xa mus rau hauv qhov chaw. Los ntawm kev tsom, cov irradiation nrog lub zog ntom ntom ntawm 104-1015W / cm² tuaj yeem tau nyob ze ntawm qhov chaw focal, uas yog qhov kub ntawm qhov siab tshaj plaws. . Laser muaj cov yam ntxwv ntawm lub siab ci, siab ncaj qha, siab monochromaticity thiab siab coherence, uas tsis sib xws los ntawm cov teeb pom kev zoo tib yam. Siv lub siab ci ntsa iab ntawm lub laser, tom qab tau tsom los ntawm lub lens, qhov kub ntawm ntau txhiab lossis txawm kaum txhiab degrees tuaj yeem tsim nyob ze ntawm qhov tsom. Lub siab ncaj qha ntawm lub laser ua rau lub laser kom zoo kis tau tus mob nyob ntev. Lub monochromaticity ntawm lub laser yog siab heev thiab lub wavelength yog ib leeg, uas yog conducive rau tsom thiab wavelength xaiv. Lub teeb laser emissions los ntawm lub laser yog kis los ntawm optical fiber mus rau lub tsom iav, thiab tom qab tsom, nws mus txog rau saum npoo ntawm lub workpiece yuav tsum tau ntxuav los ntawm lub puab qhov ntawm lub nozzle. Feem ntau yog siv lub nozzle, nrog kev pab los ntawm ib tug me me orifice nozzle coaxial nrog lub laser los tshuab ib tug roj nyob rau hauv lub siab mus rau hauv lub tu cheeb tsam. Cov pa roj yog muab los ntawm qhov chaw pabcuam roj, thiab nws lub luag haujlwm tseem ceeb yog los tiv thaiv lub lens los ntawm kev ua qias tuaj los ntawm cov pa taws thiab cov pa taws, thiab ua kom huv ntawm qhov chaw ua haujlwm thiab ntxiv dag zog rau thermal nyhuv ntawm laser thiab cov khoom siv.
Raws li pom nyob rau hauv daim duab 1, tom qab nqus tau lub zog laser, cov pa phem nyob rau saum npoo ntawm cov khoom yog vaporized thiab volatilized, los yog tam sim ntawd rhuab thiab nthuav kom kov yeej lub adsorption quab yuam ntawm qhov chaw ntawm cov khoom, thiaj li hais tias lawv yuav tsum tau muab cais. los ntawm qhov chaw ntawm qhov khoom, yog li ua tiav lub hom phiaj ntawm kev ntxuav. Tam sim no, muaj qee qhov kev tsis pom zoo ntawm lub tshuab laser tu, tab sis feem ntau ntawm cov txheej txheem tuaj yeem piav qhia qee qhov tshwm sim hauv kev sim tshuaj ntxuav laser, uas feem ntau muaj xws li laser vaporization decomposition, laser tev, thermal expansion ntawm av hais, substrate nto vibration thiab muaj. yog plaub yam ntawm particle vibration; Tsis tas li ntawd, kev ntxuav laser feem ntau yog tshwm sim los ntawm kev ua haujlwm ib txhij ntawm ntau lub tshuab.
Daim duab 1 Lub hauv paus ntsiab lus ntawm laser tu
Laser tu mechanism raws li qhov chaw adhesion thiab substrate thermophysical tsis txawv ntawm qhov loj me. Thaum qhov adhesion ntawm qhov chaw thiab cov khoom siv hauv cov khoom siv thermophysical tsis txawv qhov sib txawv, lub laser tu tshuab muaj xws li: ablation vaporization, thermal vibration thiab thermal shock mechanism thiab acoustic shattering mechanism, xws li laser tu xim thiab roj hmab txheej. Thaum qhov adhesion ntawm qhov chaw thiab cov khoom siv substrate thermophysical tsis txawv, feem ntau ablation vaporization mechanism hauv kev txiav txim, xws li laser xeb tshem tawm.
Stainless hlau weld nto ntxuav kev tshawb fawb
Kuv lub tuam txhab ua haujlwm ntev ntev ntawm T4003 stainless hlau lub cev ntawm lub tsheb, thiab feem ntau ntawm cov hlau stainless lub cev, stainless hlau cov ntaub ntawv nyob rau hauv lub vuam, lub zos qhov chaw vim lub sib dhos sib txawv yog super tsis zoo, uas ua rau lub tshav kub loj input, tshwj xeeb tshaj yog thaum siv lub phaj nyias ntawm li 3 hli, yuav ua rau nto oxidation nyob ze ntawm stainless hlau weld thiab weld rov qab, rhuav tshem cov thawj passivation txheej ntawm cov khoom, kom cov khoom corrosion kuj txo los yog txawm tsis ua hauj lwm. Qee cov khoom ntawm stainless hlau zoo li tsis xav tau pleev xim los yog pleev xim pob tshab xim kua roj vanish, ntau oxidation tshwm sim los ntawm cov xim sib txawv yuav cuam tshuam rau tag nrho cov kev zoo nkauj ntawm lub tsheb. Stainless hlau weld over-oxidation feem ntau tshwm sim nyob rau sab nrauv ntawm lub cev, xws li sab phab ntsa, sab phab ntsa phab ntsa thiab lwm qhov chaw, tshwj xeeb tshaj yog sab phab ntsa thiab kawg phab ntsa phaj (kawg phab ntsa crossband) txuas qhov chaw, raws li qhia hauv Daim duab 2.
Daim duab 2 Stainless hlau lub cev sab nrauv weld tshav kub cuam tshuam cheeb tsam ntau oxidation
Raws li cov lus pom zoo ntawm AWS D18.2 tus qauv thiab AS 1554.6 tus qauv, qhov saum npoo ntawm qhov vuam thiab qhov chaw raug kub hnyiab tau tso cai kom muaj lub teeb straw-xim xim oxides, thiab cov qauv 1 ~ 3 hauv daim duab 3, xiav, xim av thiab dub oxides tsis ua raws li qhov yuav tsum tau ua. Ntxiv nrog rau kev sib txuas oxidation, stainless hlau lub cev hauv kev tsim cov xeb hauv zos lossis lwm yam kab mob thiab lwm yam teeb meem, peb tes num npaj siab los txheeb xyuas kev siv lub tshuab ntxhua khaub ncaws laser kom tshem tawm ntau dhau oxidation thiab xeb thiab lwm yam impurities ntawm stainless hlau. steel, thiab corrosion kuj ntawm qhov chaw kho los ntawm txoj kev xeem.
Daim duab 3 Stainless hlau weld thiab tshav kub cuam tshuam cheeb tsam oxidation discoloration kuaj (AWS D18.2:2009)
(1) Cov txheej txheem xeem xaiv 65W handheld laser ntxuav cov cuab yeej, los ntawm kev hloov pauv, cov teebmeem sib txawv tuaj yeem tau txais, cov teebmeem kev kho mob sib txawv raws li qhov sib txawv tau pom hauv daim duab 4, los ntawm ntau qhov kev sim, txhawm rau ua tiav lub xeev zoo tagnrho, tsim nyog parameter settings yog raws li nram no:
① Laser zog: 65W.
② Kev sib tsoo: 1.2.
③ Pulse dav: 30 ~ 240ns.
④ Pulse zog: {{0}}.1 ~ 0.8mJ, zoo zog 0.1 ~ 0.2mJ.
Daim duab 4 Stainless hlau coj mus kuaj deg tu
(2) Cov txiaj ntsig kev ntsuas tau tuaj yeem tshem tawm tag nrho cov txheej txheem oxide los ntawm qhov chaw vuam thiab qhov kub thiab txias tom qab kev kho mob los ntawm lub tshuab ntxuav laser raws li cov lus qhia saum toj no, raws li pom hauv daim duab 5 ~ Daim duab 7.
Daim duab 5 Kev sib piv ntawm ua ntej thiab tom qab ntxuav lub pob tw welds
Daim duab 6 Kev sib piv ntawm kev ua ntej thiab tom qab kev ntxuav ntawm cov fillet welds
Daim duab 7 Kev sib piv ntawm ua ntej thiab tom qab ntxuav sab nraum qab ntawm cov fillet weld
Raws li qhov chaw kho mob ntawm lub xeev ntawm qhov sib txawv ntawm lub teeb haum, los ntawm kev kho lub wavelength thiab lwm yam tsis, lub laser tsis tsuas yog ntxuav cov hlau nto oxide txheej, tab sis kuj sai sai ntxuav lub stainless hlau nto xeb thiab xim (saib daim duab 8 ~ Daim duab 9)
Daim duab 8 Upper side beam xeb tu
Daim duab 9 Varnish tu
Laser nto tu tsis tau tsuas yog tshem tawm tag nrho cov oxide txheej ntawm vuam thiab tshav kub cuam tshuam cheeb tsam, tab sis kuj tsim ib tug tshiab passivation txheej los tiv thaiv rusting dua. Txhawm rau txhawm rau txheeb xyuas qhov kev tiv thaiv corrosion ntawm cov txheej txheem passivation tshiab, kev sim sib piv ntawm corrosion kuj nyob rau hauv ib puag ncig ntuj thiab simulated. Qhov kev sim no tau ua los ntawm lub zos laser ntxuav ntawm ob daim ntawv xeem, uas tau muab khaws cia rau hauv qhov chaw sib txawv rau lub sijhawm los saib xyuas qhov xwm txheej ntawm xeb. Qhov xwm txheej corrosion yog pom nyob rau hauv daim duab 10: Test phaj 1 tau muab tso rau hauv qhov chaw qhib sab nraum zoov rau 6 lub hlis, thiab nws tau pom tias muaj ntau cov kab xeb ntawm qhov tsis huv, thaum lub npoo tsuas yog xeb me ntsis tom qab laser tu. . Test phaj 2 tau muab tso rau hauv tsev ntawm chav tsev kub rau 6 lub hlis, thiab nws tau pom tias cov xim oxidation ntuj tshwm nyob rau ntawm qhov chaw tsis huv, thiab tsis muaj xim los yog xeb tau pom nyob rau saum npoo tom qab laser ntxuav, thiab nws tseem yog xim hlau xim.
Fig. 10 Daim duab ntawm stainless hlau phaj qauv tom qab ntxuav rau 6 lub hlis
Laser nto tu tshuab tuaj yeem tshem tawm cov xim oxidation ntawm stainless hlau weld thiab tshav kub-cuam tshuam cheeb tsam nrog rau cov xim thiab xeb ntawm qhov chaw ntawm stainless hlau; laser deg tu tshuab tuaj yeem tsim cov txheej txheem passivation tshiab nrog zoo corrosion kuj; qhov saum npoo ntawm stainless hlau tom qab laser tu tsis muaj qhov sib txawv xim loj nrog cov khoom qub.
Yog tias koj xav paub ntau ntxiv txog MRJ-Laser, thov mus saib:
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