Dhau li ntawm qhov ua tau zoo ua tau zoo coj los ntawm laser vuam, nws yuav tsum coj qee qhov tsis zoo nyob rau tib lub sijhawm, xws li vuam tawg, thiab lwm yam, tab sis nws tuaj yeem raug zam los ntawm qee yam kev ua haujlwm, uas yuav tsum tau peb cov neeg ua haujlwm vuam kom muaj kev vuam kev lag luam. muaj peev xwm. Koj paub, lub laser vuam tshuab siv high-zog mem tes laser tsom rau yaj cov hlau workpiece kom ua tiav lub hom phiaj ntawm vuam. Thaum qhov kev ua haujlwm tsis raug, Nws yuav ua rau kub tawg lossis tawg tawg, yog li tus neeg ua haujlwm laser vuam, koj yuav tsum paub tias vim li cas cov kab nrib pleb no tshwm sim.
1. Metallurgical yam
Cov yam ntxwv ntawm cov cua kub tsis sib haum thiab ceev ceev ntawm laser vuam ua rau tag nrho cov kev sib koom ua ke nyob rau hauv ib tug complex kev nyuaj siab lub xeev, uas constitutes lub mechanical yam ntawm kev sib koom ua ke; Laser welding kuj yog kev sib txuas ntawm cov txheej txheem tsis sib xws. Nyob rau hauv tus txheej txheem ntawm metallurgical sai solidification, yuav inevitably yuav unevenly faib ntawm lub Cheebtsam thiab hardened lug nrog tsis tshua muaj tawg tsis kam, uas tsim metallurgical yam uas txhawb kev tawg pib.
2. Mechanical Factors
Muaj peb hom kab nrib pleb uas tsim nyob rau hauv cov txheej txheem vuam ntawm laser vuam tshuab: cov khoom tawg, liquefaction tawg thiab reheat tawg.
Crystal tawg:
Nws muaj feem xyuam rau qhov tsis sib xws ntawm cov khoom sib xyaw hauv thaj tsam macro ntawm lub vuam. Lub hauv paus cheeb tsam ntawm weld yog qhov chaw uas cov kua theem crystallization yog qhov tseeb. Lub columnar crystals ntawm ob sab ntawm weld hla ntawm no. Nyob rau tib lub sij hawm, ib tug loj tus naj npawb ntawm cov uas tsis muaj melting point impurities kuj accumulates ntawm no, tsim centerline segregation, uas txo cov kev sib raug zoo zog ntawm qhov chaw. Nyob rau hauv tej yam kev mob, cov kab nrib pleb tshwm sim nyob rau hauv qhov no.
Liquefaction tawg:
Nyob rau hauv qhov ze seam cheeb tsam los yog cov nyob ib sab weld hlaws tshav kub cuam tshuam cheeb tsam ntawm ntau txheej thiab multi pass vuam, qhov tsawg melting point eutectic nyob rau hauv lub grain ciam yog remelted vim lub vuam thermal voj voog, uas ua rau intergranular tawg nyob rau hauv qhov kev txiav txim ntawm shrinkage quab yuam. .
Reheat crack:
Cov kab nrib pleb uas ua los ntawm reheating lub vuam nyob rau hauv ib tug tej yam kub thiab txias tom qab vuam (kev nyuaj siab nyem kev kho cua sov los yog lwm yam txheej txheem cua sov) yog hu ua reheat cracks.
Zoo, dhau los ntawm kev txheeb xyuas luv luv saum toj no, kuv ntseeg tias ntau tus neeg ua haujlwm laser vuam tuaj yeem kawm paub yuav ua li cas kom tsis txhob muaj qhov tsis zoo ntawm cov kab nrib pleb thaum lub vuam, thiab qhov kev ua haujlwm tiag tiag yog tias feem ntau ntawm cov neeg ua haujlwm laser vuam yuav tsum tau kawm los ntawm lawv cov haujlwm niaj hnub. Los ntawm kev ua haujlwm ntev mus ntev, nws tau ua txhua yam ua si rau qhov zoo ntawm laser vuam tshuab, Ua kom siv tag nrho cov tshuab laser vuam ua kom coj tau qib siab ntawm kev lag luam cov txiaj ntsig thiab lub neej zoo.
