Tus nqi nqus laser thiab kev hloov pauv hauv lub xeev ntawm cov khoom ntawm cov khoom siv laser sib cuam tshuam

Kev sib cuam tshuam ntawm laser thiab cov ntaub ntawv muaj ntau yam tshwm sim thiab cov yam ntxwv ntawm lub cev. Peb tsab xov xwm tom ntej no yuav qhia txog peb yam tseem ceeb ntawm lub cev uas cuam tshuam nrog cov txheej txheem vuam laser kom muab kev nkag siab meej dua txogcov txheej txheem vuam laser: muab faib ua laser absorption rate thiab kev hloov pauv hauv lub xeev, plasma thiab keyhole effect. Lub sijhawm no, peb yuav hloov kho qhov kev sib raug zoo ntawm kev hloov pauv hauv lub xeev ntawm laser thiab cov ntaub ntawv thiab absorption rate.

Kev hloov pauv ntawm lub xeev ntawm cov khoom tshwm sim los ntawm kev sib cuam tshuam ntawm laser thiab cov ntaub ntawv

Kev ua laser ntawm cov khoom siv hlau yog raws li kev ua thermal ntawm cov teebmeem photothermal. Thaum laser irradiation siv rau ntawm qhov chaw ntawm cov khoom, ntau yam kev hloov pauv yuav tshwm sim hauv thaj chaw ntawm cov khoom ntawm ntau lub zog sib txawv. Cov kev hloov pauv no suav nrog qhov kub ntawm qhov chaw nce, yaj, vaporization, tsim qhov tseem ceeb, thiab plasma tiam. Ntxiv mus, cov kev hloov pauv hauv lub xeev lub cev ntawm thaj chaw ntawm cov khoom cuam tshuam loj heev rau cov khoom siv nqus ntawm laser. Nrog rau kev nce ntawm lub zog ceev thiab lub sijhawm ua haujlwm, cov khoom siv hlau yuav dhau los ua cov kev hloov pauv hauv qab no:

Thaum lublub zog laserQhov ceev yog qis (<10 ^ 4w/cm ^ 2) thiab lub sijhawm irradiation luv luv, lub zog laser uas cov hlau nqus tau tsuas yog ua rau qhov kub ntawm cov khoom siv nce ntawm qhov chaw mus rau sab hauv, tab sis cov khoom khov kho tseem tsis hloov pauv. Nws feem ntau yog siv rau qhov annealing thiab theem hloov pauv hardening kho, nrog rau cov cuab yeej, iav, thiab bearings yog feem ntau;

Nrog rau qhov nce ntawm lub zog laser ceev (10 ^ 4-10 ^ 6w / cm ^ 2) thiab lub sijhawm ntev ntawm lub sijhawm irradiation, qhov chaw ntawm cov khoom siv maj mam yaj. Thaum lub zog nkag mus ntxiv, qhov sib txuas ntawm cov kua-khoom tawv maj mam txav mus rau qhov tob ntawm cov khoom siv. Cov txheej txheem lub cev no feem ntau yog siv rau kev rov ua dua qhov chaw, kev sib xyaw, cladding, thiab thermal conductivity vuam ntawm cov hlau.

Los ntawm kev nce ntxiv qhov ceev ntawm lub zog (> 10 ^ 6w / cm ^ 2) thiab ua kom lub sijhawm ua haujlwm laser ntev dua, qhov chaw ntawm cov khoom tsis tsuas yog yaj xwb tab sis kuj ua pa, thiab cov tshuaj ua pa sib sau ua ke ze ntawm qhov chaw ntawm cov khoom thiab ua rau tsis muaj zog los ua cov plasma. Cov plasma nyias no pab cov khoom nqus cov laser; Nyob rau hauv lub siab ntawm kev ua pa thiab nthuav dav, qhov chaw kua deforms thiab tsim cov qhov. Theem no tuaj yeem siv rau kev vuam laser, feem ntau hauv kev sib txuas thermal conductivity vuam ntawm cov kev sib txuas me me hauv 0.5 hli.

Los ntawm kev nce ntxiv qhov ceev ntawm lub zog (> 10 ^ 7w / cm ^ 2) thiab ncua lub sijhawm irradiation, qhov chaw ntawm cov khoom siv dhau los ua pa dej ntau, tsim cov plasma nrog qib ionization siab. Cov plasma ntom ntom no muaj cov nyhuv tiv thaiv rau lub laser, txo qhov ceev ntawm lub zog ntawm lub laser nkag mus rau hauv cov khoom siv. Tib lub sijhawm, nyob rau hauv lub zog loj ntawm cov pa tshuaj tiv thaiv, cov qhov me me, feem ntau hu ua qhov tseem ceeb, tau tsim hauv cov hlau yaj. Qhov muaj cov qhov tseem ceeb yog qhov zoo rau cov khoom siv los nqus laser, thiab theem no tuaj yeem siv rau laser sib sib zog nqus vuam, txiav thiab drilling, cuam tshuam hardening, thiab lwm yam.

Nyob rau hauv cov xwm txheej sib txawv, cov wavelengths sib txawv ntawm laser irradiation ntawm cov khoom siv hlau sib txawv yuav ua rau muaj cov nqi tshwj xeeb ntawm lub zog ceev ntawm txhua theem.

Hais txog kev nqus ntawm laser los ntawm cov ntaub ntawv, qhov ua pa ntawm cov ntaub ntawv yog ib qho ciam teb. Thaum cov ntaub ntawv tsis dhau los ua pa, txawm tias nyob rau hauv cov khoom khov lossis kua, nws qhov kev nqus ntawm laser tsuas yog hloov pauv qeeb nrog qhov nce ntawm qhov kub ntawm qhov chaw; Thaum cov ntaub ntawv ua pa thiab tsim cov plasma thiab cov qhov tseem ceeb, cov ntaub ntawv nqus ntawm laser yuav hloov pauv tam sim ntawd.

Raws li pom hauv Daim Duab 2, qhov nqus ntawm laser ntawm qhov chaw ntawm cov khoom siv thaum lub sijhawm laser vuam sib txawv nrog lub zog laser ceev thiab qhov kub ntawm qhov chaw ntawm cov khoom siv. Thaum cov khoom siv tsis yaj, qhov nqus ntawm cov khoom siv rau laser maj mam nce nrog qhov nce ntawm qhov kub ntawm qhov chaw ntawm cov khoom siv. Thaum lub zog ceev ntau dua (10 ^ 6w / cm ^ 2), cov khoom siv vaporizes hnyav, tsim ib lub qhov tseem ceeb. Lub laser nkag mus rau hauv lub qhov tseem ceeb rau ntau qhov kev cuam tshuam thiab kev nqus, ua rau muaj kev nce ntxiv ntawm cov khoom siv nqus rau laser thiab kev nce ntxiv ntawm qhov tob ntawm kev yaj.

Kev nqus ntawm Laser los ntawm cov khoom siv hlau - Wavelength

Daim duab saum toj no qhia txog qhov nkhaus kev sib raug zoo ntawm qhov kev cuam tshuam, kev nqus, thiab qhov ntev ntawm cov hlau siv feem ntau ntawm chav tsev kub. Hauv thaj chaw infrared, qhov kev nqus dej txo qis thiab qhov kev cuam tshuam nce nrog qhov nce ntawm qhov ntev. Feem ntau cov hlau cuam tshuam tau zoo 10.6um (CO2) qhov ntev ntawm lub teeb infrared thaum tsis muaj zog cuam tshuam 1.06um (1060nm) qhov ntev ntawm lub teeb infrared. Cov khoom siv hlau muaj qhov nqus dej siab dua rau cov lasers luv luv, xws li lub teeb xiav thiab ntsuab.

Kev Nqus Tau Laser Los Ntawm Cov Khoom Siv Hlau - Qhov Kub Thiab Qhov Ceev Ntawm Lub Zog Laser

Piv txwv li, thaum cov khoom siv khov kho, qhov nqus ntawm lub laser yog li ntawm 5-7%, qhov nqus dej yog txog li 25-35%, thiab nws tuaj yeem ncav cuag ntau dua 90% hauv lub xeev keyhole.

Tus nqi nqus ntawm cov khoom siv rau lub laser nce ntxiv nrog rau qhov kub nce ntxiv. Tus nqi nqus ntawm cov khoom siv hlau ntawm chav tsev kub yog qis heev. Thaum qhov kub nce mus txog ze rau qhov melting point, nws tus nqi nqus tuaj yeem ncav cuag 40% ~ 60%. Yog tias qhov kub nyob ze rau qhov boiling point, nws tus nqi nqus tuaj yeem ncav cuag siab txog 90%.

Kev Nqus Tau Laser Los Ntawm Cov Khoom Siv Hlau - Qhov Xwm Txheej Ntawm Qhov Chaw

Tus nqi nqus ib txwm yog ntsuas siv cov hlau du, tab sis hauv kev siv laser cua sov, feem ntau nws yog qhov tsim nyog los nce tus nqi nqus ntawm qee cov ntaub ntawv siab reflection (txhuas, tooj liab) kom tsis txhob muaj kev vuam cuav los ntawm kev cuam tshuam siab;

Cov hau kev hauv qab no siv tau:

1. Kev siv cov txheej txheem kho kom zoo ua ntej kom txhim kho qhov kev cuam tshuam ntawm laser: prototype oxidation, sandblasting, laser cleaning, nickel plating, tin plating, graphite coating, thiab lwm yam tuaj yeem txhim kho qhov nqus ntawm cov khoom siv laser;

Lub hauv paus tseem ceeb yog ua kom cov khoom nto roughness ntau dua (uas ua rau muaj ntau yam kev cuam tshuam thiab kev nqus ntawm laser), thiab ua kom cov khoom txheej muaj kev nqus siab dua. Los ntawm kev nqus lub zog laser thiab yaj thiab ua rau nws dhau los ntawm cov khoom nqus siab, cua sov laser raug xa mus rau cov khoom siv hauv paus kom txhim kho qhov nqus ntawm cov khoom siv thiab txo qhov kev vuam virtual uas tshwm sim los ntawm qhov tshwm sim siab.