1. Daim ntawv thov piv txwv
1) Splicing board
Hauv xyoo 1960, Toyota Motor Company thawj zaug tau txais kev txiav-welded dawb paug tshuab. Nws yog txhawm rau txuas ob lossis ntau daim ntawv ua ke los ntawm kev vuam thiab tom qab ntawd stamp lawv. Cov ntawv no tuaj yeem muaj qhov sib txawv thicknesses, cov ntaub ntawv, thiab cov khoom. Vim tias qhov yuav tsum tau muaj ntau dua rau kev ua haujlwm ntawm lub tsheb thiab kev ua haujlwm xws li kev txuag hluav taws xob, kev tiv thaiv ib puag ncig, kev nyab xeeb ntawm kev tsav tsheb, thiab lwm yam, tailor vuam tshuab tau nyiam ntau thiab ntau dua. Phaj welding tuaj yeem siv qhov chaw vuam, flash taub qab vuam,laser vuam, hydrogen arc vuam, thiab lwm yam. Tam sim no,laser vuamyog siv nyob rau hauv txawv teb chaws kev tshawb fawb thiab zus tau tej cov tailor-welded blanks.
Los ntawm kev sib piv cov kev xeem thiab kev suav cov txiaj ntsig, cov txiaj ntsig tau pom zoo, txheeb xyuas qhov tseeb ntawm cov qauv ntsuas kub. Qhov dav ntawm weld seam nyob rau hauv cov txheej txheem sib txawv yog xam thiab maj mam optimized. Thaum kawg, txoj kab hluav taws xob sib piv ntawm 2: 1 tau txais yuav, ob kab teeb tau teeb tsa nyob rau hauv tib lub sijhawm, lub zog loj loj nyob ntawm qhov nruab nrab ntawm lub vuam seam, thiab lub zog me me nyob ntawm lub phaj tuab. Nws tuaj yeem txo qhov dav ntawm weld. Thaum ob kab teeb yog 45 degrees ntawm ib leeg. Thaum npaj, cov nqaj ua rau ntawm daim phaj tuab thiab nyias phaj raws li. Vim qhov txo qis ntawm txoj kab hluav taws xob cua sov ua haujlwm zoo, qhov dav vuam kuj txo.
2) Aluminium hlau tsis sib xws hlau
Txoj kev tshawb fawb tam sim no kos cov lus xaus hauv qab no: (1) Raws li cov kab hluav taws xob sib piv nce ntxiv, lub thickness ntawm intermetallic compound nyob rau hauv tib txoj hauj lwm cheeb tsam ntawm weld / aluminium alloy interface maj mam txo qis, thiab cov khoom faib ua ntau zaus. Thaum RS = 2, lub thickness ntawm lub interface IMC txheej yog nruab nrab ntawm 5-10 microns. Qhov siab tshaj plaws ntawm qhov pub dawb "zoo li koob" IMC yog nruab nrab ntawm 23 microns. Thaum RS = 0.67, lub thickness ntawm lub interface IMC txheej yog qis dua 5 microns, thiab lub siab tshaj plaws ntev ntawm dawb "zoo li koob" IMC yog 5.6 microns. Lub thickness ntawm intermetallic compound yog ho txo.
(2)Thaum uas tig mus dual-beam laser siv rau vuam, IMC ntawm qhov vuam / aluminium alloy interface yog qhov tsis sib xws. IMC txheej thickness ntawm qhov vuam / aluminium alloy interface nyob ze ntawm cov hlau / txhuas alloy sib txuas yog tuab, nrog qhov siab tshaj plaws ntawm 23.7 microns. . Raws li cov kab hluav taws xob sib piv nce ntxiv, thaum RS = 1.50, lub thickness ntawm IMC txheej ntawm vuam / aluminium alloy interface tseem ntau dua li cov thickness ntawm intermetallic compound nyob rau hauv tib cheeb tsam ntawm lub serial dual beam.
3. Aluminium-lithium alloy T-puab sib koom ua ke
Hais txog cov khoom siv ntawm laser welded pob qij txha ntawm 2A97 aluminium alloy, cov kws tshawb fawb tau kawm txog microhardness, tensile zog thiab qaug zog zog. Cov txiaj ntsig kev ntsuam xyuas pom tau tias: qhov chaw vuam ntawm lub laser welded sib koom ntawm 2A97-T3 / T4 aluminium alloy yog softened heev. Cov coefficient yog nyob ib ncig ntawm 0.6, uas yog feem ntau cuam tshuam nrog kev sib cais thiab kev nyuaj tom ntej hauv nag lossis daus ntawm lub zog ntxiv; Lub zog coefficient ntawm 2A97-T4 aluminium alloy sib koom ua ke los ntawm IPGYLR-6000 fiber ntau laser tuaj yeem ncav cuag 0.8, tab sis cov yas yog tsawg, thaum IPGYLS-4000 fiber ntaulaser vuamLub zog coefficient ntawm laser welded 2A97-T3 txhuas alloy pob qij txha yog hais txog 0.6; pore defects yog lub hauv paus chiv keeb ntawm qaug zog tawg nyob rau hauv 2A97-T3 txhuas alloy laser welded pob qij txha.
Nyob rau hauv hom synchronous, raws li kev sib txawv siv lead ua morphologies, FZ yog tsim los ntawm columnar crystals thiab equiaxed crystals. Lub columnar crystals muaj ib qho epitaxial EQZ kev loj hlob orientation, thiab lawv cov lus qhia kev loj hlob yog perpendicular rau fusion kab. Qhov no yog vim qhov saum npoo ntawm EQZ nplej yog npaj txhij-ua nucleation particle, thiab cov cua kub dissipation nyob rau hauv cov kev taw qhia no yog ceev tshaj plaws. Yog li ntawd, thawj crystallographic axis ntawm txoj kab ntsug fusion loj hlob zoo dua thiab ob sab yog txwv. Raws li cov columnar crystals loj hlob mus rau qhov chaw ntawm cov weld, cov qauv morphology hloov thiab columnar dendrites yog tsim. Nyob rau hauv nruab nrab ntawm lub weld, qhov kub ntawm lub pas dej molten yog siab, lub tshav kub dissipation tus nqi yog tib yam nyob rau hauv tag nrho cov lus qhia, thiab cov nplej loj hlob equiaxially nyob rau hauv tag nrho cov lus qhia, tsim equiaxed dendrites. Thaum lub hauv paus crystallographic axis ntawm equiaxed dendrites yog raws nraim tangent rau cov qauv dav hlau, pom tseeb paj zoo li nplej tuaj yeem pom nyob rau hauv theem metallographic. Tsis tas li ntawd, cuam tshuam los ntawm supercooling ntawm cov khoom hauv zos hauv cheeb tsam weld, equiaxed nplua-grained bands feem ntau tshwm sim nyob rau hauv welded seam cheeb tsam ntawm synchronous hom T-zoo li tus sib koom, thiab cov nplej morphology nyob rau hauv equiaxed nplua-grained band yog txawv los ntawm Lub grain morphology ntawm EQZ. Zoo li qub. Vim hais tias cov txheej txheem cua sov ntawm hom heterogeneous TSTB-LW txawv ntawm cov hom synchronous TSTB-LW, muaj qhov sib txawv hauv cov macromorphology thiab microstructure morphology. Hom heterogeneous TSTB-LW T-puab sib koom ua ke tau ntsib ob lub voj voog thermal, uas qhia ob chav molten pas dej ua ke. Muaj ib qho kev pom tseeb theem nrab fusion kab hauv qhov vuam, thiab lub pas dej molten tsim los ntawm thermal conduction vuam yog me me. Nyob rau hauv hom heterogeneous TSTB-LW txheej txheem, qhov sib sib zog nqus nqus vuam yog cuam tshuam los ntawm cov txheej txheem cua sov ntawm thermal conduction vuam. Cov columnar dendrites thiab equiaxed dendrites nyob ze rau ntawm cov kab sib txuas thib ob muaj tsawg dua subgrain ciam teb thiab hloov mus rau hauv columnar lossis cellular crystals, qhia tias cov txheej txheem cua sov ntawm thermal conductivity welding muaj kev kho cua sov ntawm kev sib sib zog nqus welds. Thiab cov nplej loj ntawm dendrites nyob rau hauv nruab nrab ntawm cov thermally conductive weld yog 2-5 microns, uas yog ntau me dua li cov nplej loj ntawm dendrites nyob rau hauv nruab nrab ntawm qhov tob tob weld (5-10 microns). Qhov no feem ntau cuam tshuam rau qhov siab tshaj plaws cua sov ntawm cov welds ntawm ob sab. Qhov kub thiab txias muaj feem xyuam rau qhov txias txias tom qab.
3) Lub hauv paus ntsiab lus ntawm ob-beam laser hmoov cladding vuam
4)High solder sib koom lub zog
Nyob rau hauv ob-beam laser hmoov deposition welding xyaum ua tej yam, txij li thaum ob lub laser beams faib ib sab ntawm ob sab ntawm tus choj hlau, qhov ntau ntawm lub laser thiab lub substrate yog loj dua li ntawm ib leeg-beam laser hmoov deposition welding, thiab lub resulting solder pob qij txha yog ntsug rau tus choj hlau. Cov kev taw qhia hlau yog qhov elongated. Daim duab 3.6 qhia txog cov pob qij txha uas tau txais los ntawm ib leeg-beam thiab ob-beam laser hmoov deposition vuam. Thaum lub sij hawm welding txheej txheem, seb nws yog ob-nqajlaser vuamtxoj kev los yog ib-nqajlaser vuamtxoj kev, ib tug tej yam molten pas dej ua ke yog tsim nyob rau hauv lub hauv paus cov ntaub ntawv los ntawm tshav kub conduction. Nyob rau hauv no txoj kev, molten puag khoom hlau nyob rau hauv lub molten pas dej ua ke yuav tsim ib tug metallurgical daim ntawv cog lus nrog lub molten self-fluxing alloy hmoov, yog li ua tiav vuam. Thaum siv ob lub teeb laser rau vuam, kev sib cuam tshuam ntawm cov nqaj laser thiab cov khoom siv hauv paus yog kev sib cuam tshuam ntawm qhov chaw ua haujlwm ntawm ob lub laser beam, uas yog, kev sib cuam tshuam ntawm ob lub pas dej molten tsim los ntawm laser ntawm cov khoom siv. . Nyob rau hauv no txoj kev, lub resulting tshiab fusion Qhov cheeb tsam yog loj dua li ntawm ib leeg-beamlaser vuam, yog li cov pob qij txha tau txais los ntawm ob-nqajlaser vuammuaj zog tshaj ib leeg-nqajlaser vuam.
2. Siab solderability thiab repeatability
Nyob rau hauv ib lub teeblaser vuamkev sim, txij li qhov chaw ntawm qhov chaw tsom ntawm lub laser ncaj qha ua rau ntawm micro-bridge hlau, tus choj hlau muaj qhov xav tau siab heevlaser vuamtxheej txheem tsis, xws li tsis sib npaug laser zog density faib thiab tsis sib xws alloy hmoov thickness. Qhov no yuav ua rau cov hlau tawg thaum lub sij hawm vuam txheej txheem thiab txawm ncaj qha ua rau tus choj hlau vaporize. Nyob rau hauv ob-beam laser welding txoj kev, txij li thaum lub tsom qhov chaw ntawm ob lub laser beam tsis ncaj qha mus rau lub micro-bridge xov hlau, cov kev cai nruj rau cov txheej txheem laser welding tsis ntawm tus choj hlau raug txo, thiab weldability thiab repeatability tau zoo heev. .
Post lub sij hawm: Oct-17-2023
