1. Hom roj thaiv kev tiv thaiv
Cov feem ntau siv cov ntaub thaiv npog rau cov vuam siv laser yog N2, Ar thiab Nws. Lawv cov khoom siv lub cev thiab tshuaj siv tau sib txawv, yog li cov nyhuv ntawm lub weld kuj sib txawv.
1) N2
Lub zog ionization ntawm N2 yog muaj nqees, siab dua li ntawm AR thiab qis dua qhov ntawm nws. Qhov ntsuas ionization ntawm N2 yog qhov dav dav ntawm qhov kev txiav txim ntawm laser, uas tuaj yeem txo qhov tsim ntawm plasma huab thiab nce kev siv cov ua haujlwm zoo ntawm laser. Nitrogen tuaj yeem hnov mob nrog aluminium alloy thiab carbon steel ntawm lub ntsuas kub kom tsim nitride, uas yuav txhim kho lub weld brittleness, txo qhov tawv thiab muaj qhov cuam tshuam zoo rau cov khoom siv ntawm lub tshuab tsis sib haum. Yog li no, nws tsis pom zoo kom siv cov tshuaj tiv thaiv nitrogen los tiv thaiv lub weld ntawm aluminium alloy thiab carbon hlau.
Cov nitride tsim tawm los ntawm cov tshuaj lom neeg cov tshuaj tiv thaiv ntawm cov nitrogen thiab stainless hlau tuaj yeem txhim kho lub zog ntawm kev sib txuas ntawm qhov txuas, uas yog qhov zoo rau kev txhim kho ntawm cov khoom siv kho tshuab ntawm qhov txuas, yog li nitrogen tuaj yeem siv los tiv thaiv roj thaum vuam hlau.
2) Ar
Lub zog ionization ntawm AR yog qhov tsawg, thiab cov ionization degree yog qhov siab nyob rau hauv qhov kev txiav txim ntawm laser, uas tsis yog qhov zoo rau kev tswj ntawm kev tsim cov ntshav plasma, thiab yuav muaj qee yam kev cuam tshuam rau kev siv laser kom zoo. Txawm li cas los xij, kev ua haujlwm ntawm AR tsawg heev, nws tsis yooj yim rau cov tshuaj tiv thaiv nrog cov hlau ua ke, thiab tus nqi ntawm AR tsis siab. Tsis tas li ntawd, qhov ceev ntawm AR yog loj, uas yog qhov zoo rau tog dua lub pas dej weld, Nws tuaj yeem tiv thaiv zoo dua cov pas dej weld, yog li nws tuaj yeem siv cov pa hluav taws xob zoo li qub.
3) Nws
Lub zog ionization ntawm nws yog qhov siab tshaj plaws, thiab ionization degree yog qhov qis heev nyob rau hauv qhov kev txiav txim ntawm laser, uas tuaj yeem tswj tau qhov tsim ntawm plasma huab zoo. Laser tuaj yeem ua raws li cov hlau ua tau zoo, thiab nws cov kev ua haujlwm yog tsawg heev, uas yog ib qho tsis cuam tshuam nrog cov hlau, yog li nws yog qhov zoo weld tiv thaiv roj. Txawm li cas los xij, tus nqi ntawm nws siab dhau, yog li nws tsis siv rau hauv cov khoom lag luam huab hwm coj dav, Nws feem ntau siv hauv kev tshawb fawb los yog cov khoom lag luam muaj txiaj ntsig.
2.Blowing hom kev tiv thaiv roj
Tam sim no, feem ntau muaj ob txoj hauv kev los tshuab cov roj thaiv kev tiv thaiv: ib qho yog los tshuab cov roj thaiv kev tiv thaiv nyob rau sab ntug, raws li pom hauv daim duab 1; Lwm qhov yog coaxial shielding gas, raws li qhia hauv daim duab 2.
Daim duab 1 Sab ntug ib sab los thaiv lub tshuab roj
Daim duab 2 Coaxial shielding gas
Yuav ua li cas xaiv ob txoj hauv kev ntawm kev tshuab raj yog ib qho kev xav hauv ntau yam. Nyob rau hauv dav dav, nws raug nquahu kom siv txoj kev ntawm sab tshuab tiv thaiv roj.
Xaiv lub hauv paus ntsiab lus ntawm cov tshuab hauv hom kev tiv thaiv cov pa roj
Ua ntej tshaj plaws, nws yuav tsum paub meej tias qhov thiaj li hu" oxidation" ntawm weld tsuas yog ib qho muaj npe tas nrho. Raws li txoj kev xav, nws yog hais txog kev siv tshuaj lom neeg ntawm cov hlau txuas thiab cov khoom sib xyaw ua ke hauv huab cua, uas ua rau cov khoom tsis sib haum ntawm weld zoo. Qhov laj thawj feem ntau yog vim li cas cov hlau hlau txuas nrog cov pa oxygen, nitrogen, hydrogen nyob rau hauv cov pa hauv qhov kub.
Txhawm rau tiv thaiv lub weld los ntawm" oxidized" yog los txo lossis zam qhov kev sib cuag ntawm cov khoom tsis zoo no nrog lub voos hlau ntawm qhov kub, uas tsis yog tsuas yog hlau pas hlau, tab sis tseem muaj tag nrho cov txheej txheem los ntawm lub sijhawm thaum lub hlau txuas rau lub ntsej muag tsis xau rau lub sijhawm thaum cov hlau sib tsoo. thiab nws qhov kub poob qis dua ib qhov kub.
Piv txwv li, thaum qhov kub ntawm titanium alloy vuam yog siab tshaj 300 ℃, nws tuaj yeem nqus hydrogen sai, thaum qhov kub siab tshaj 450 ℃, nws tuaj yeem nqus oxygen tau sai, thiab thaum kub siab tshaj 600 600, nws tuaj yeem nqus tau nitrogen sai. Yog li ntawd, titanium alloy vuam yuav tsum muaj kev tiv thaiv zoo tom qab kev sib tw thiab thaum kub tau qis dua 300 ℃, txwv tsis pub nws yuav yog" oxidized" ;.
Nws tsis yog qhov nyuaj rau to taub los ntawm cov lus piav qhia saum toj no tias lub tshuab thaiv lub ntsej muag roj tsis yog tsuas yog xav tiv thaiv cov pas dej weld hauv lub sijhawm, tab sis kuj tseem xav tau los tiv thaiv qhov chaw tsuas ua ke uas tau txais welded. Yog li ntawd, daim ntawv qhia sab nraub qaum los thaiv cov roj thaiv cov roj uas pom hauv daim duab 1 feem ntau siv, vim tias qhov kev tiv thaiv ntawm hom qauv no tau dav dua li ntawm cov txheej txheem tiv thaiv coaxial hauv daim duab 2, Tshwj xeeb, nws muaj kev tiv thaiv zoo dua rau thaj chaw uas weld nyuam qhuav muaj solidified.
Txog kev thov engineering, tsis yog txhua yam khoom tuaj yeem lees txais txoj hauv kev ntawm lub zuaj paws ib sab tshuab tshuab pa. Rau qee yam khoom tshwj xeeb, tsuas yog coaxial tiv thaiv roj siv tau. Kev xaiv tshwj xeeb yuav tsum yog tsim los ntawm cov qauv khoom thiab daim ntawv sib koom ua ke.
