Cov txheej txheem laser vuam ntawm magnesium-on-aluminium lap joint thiab magnesium / aluminium interlayer nrog qhov sib ntxiv ntawm Ti foil yog npaj rau vuam AZ31 magnesium alloy thiab 6061 aluminium alloy, thiab lub koom haum thiab cov khoom ntawm magnesium / aluminium pob qij txha raug soj ntsuam raws li cov nyhuv. ntawm Ti foil-laser. Cov txiaj ntsig tau pom tias qhov sib ntxiv ntawm Ti-foil tuaj yeem ua tiav qhov ua tau zoo Mg / Al sib koom ua ke nyob rau hauv cov txheej txheem laser vuam, thiab lub zog shear (kab zog) ntawm Mg / Al sib koom mus txog 58 N / mm, thiab lub pas dej molten morphology hloov. los ntawm "V" zoo li tsis muaj Ti-foil mus rau "vine iav zoo" nrog Ti-foil. Cov duab ntawm lub pas dej ua ke hloov los ntawm "V" zoo li tsis muaj Ti ntawv ci rau "khob zoo" nrog Ti ntawv ci. Nrog rau qhov nce ntawm cov tuab ntawm Ti ntawv ci, qhov tob ntawm lub pas dej ua ke ntawm Mg / Al sib koom ua ke nce, Ti cov ntawv ci nyob ze ntawm txhuas sab ntawm lub substrate ib nrab melts, thiab cov ntsiab lus Ti tau muab faib rau hauv lub pas dej ua ke los tsim Ti3Al compounds. ; Qhov sib ntxiv ntawm Ti foil inhibits kev sib cuag ncaj qha ntawm magnesium thiab txhuas, thiab zam cov tshuaj tiv thaiv ntawm Mg thiab Al los tsim cov Mg / Al compounds, yog li ntawd qhov sib ntxiv ntawm Ti ntawv ci muaj qee qhov kev cuam tshuam, tab sis Ti foil muaj qis thermal conductivity, thiab nyob deb ntawm lub laser tshav kub qhov chaw. Txawm li cas los xij, cov thermal conductivity ntawm Ti ntawv ci yog qhov tsawg, nws nyob deb ntawm lub laser tshav kub qhov chaw, lub melting ntawm Ti ntawv ci yog tsis tiav, thiab kev sib txuas ntawm Ti ntawv ci nrog cov khoom siv hauv paus yuav tsum tau txhim kho.
Nrog rau txoj kev loj hlob sai ntawm cov khoom siv science, lub teeb hlau (aluminium, magnesium, titanium), lub teeb yuag thiab siab zog ceramics thiab ceramic composites, C / C composites, thiab lwm yam tau dhau los ua ntau thiab nrov hauv kev lag luam aerospace engineering, thiab muaj. yog ib qho kev xav tau ceev nrooj ntxiv rau vuam aluminium alloys nrog titanium alloys lossis magnesium alloys los tsim cov khoom sib xyaw ua ke. Laser welding yog ib qho kev sib koom ua ke sai heev nyob rau xyoo tas los no, uas siv lub zog hluav taws xob loj kom yaj cov khoom sai sai thiab ua kom ruaj khov rau tib lub sijhawm. Vim nws cov cua kub me me, me me tom qab vuam deformation, thiab vuam lub sij hawm luv luv, kev ua haujlwm siab, tsim nyog rau cov khoom sib txawv. Txawm li cas los xij, kev siv laser vuam txoj kev ntawm magnesium / aluminium dissimilar hlau welding, vim magnesium / aluminium melting point sib txawv me me, ob lub kua hlau sib cuag yog tsis muaj kev zam, cov tshuaj tiv thaiv ceev ntawm cov kua hauv lub xeev yog ntau dua li cov tshuaj tiv thaiv ceev. nruab nrab ntawm cov khoom hlau, cov tshuaj tiv thaiv Mg / Al yog nquag nkig Mg / Al compound, cov tebchaw no tsis yog nyob rau hauv kev tsim ntawm lub interface ntawm magnesium / aluminium, kuj yuav nkag mus rau hauv lub interface ntawm lub pas dej ua ke ze ntawm thaj chaw, Ua rau cov pob qij txha welded Cov tebchaw no tsis tsuas yog tsim ntawm Mg / Al interface, tab sis kuj nkag mus rau hauv lub pas dej ua ke ze ntawm qhov sib txuas, ua rau tawg tawg ntawm cov welded sib koom ua ke thiab txo qhov kev ua haujlwm ntawm Mg / Al sib koom ua ke. Kev tsim cov nkig Mg / Al compounds yog ib qho kev sib tw rau kev sib koom ua ke ntawm magnesium / aluminium los ntawm fusion welding.
Cov kws tshawb fawb hauv tsev thiab txawv teb chaws tau ua cov kev tshawb fawb tshawb fawb txog Mg / Al vuam, cov neeg sawv cev ua haujlwm xws li Zhao Limin li al. pom tias zinc interlayer tuaj yeem tiv thaiv Mg / Al ntsiab los ntawm kev sib txawv; Chang et al. tshawb xyuas lub koom haum ntawm welded pob qij txha hauv Mg / Al laser kev sib txhuam do vuam nrog Ni ntawv ci; Chen Ying tau tshawb xyuas qhov microstructure thiab cov khoom ntawm Mg / Al kev sib txhuam do lap welded pob qij txha thiab pom tias tsim ntawm Chen Ying kawm cov microstructure thiab cov khoom ntawm Mg / Al kev sib txhuam do lap welded pob qij txha thiab pom tias tsim Mg17Al12 tebchaw txhim kho cov khoom sib koom ua ke. ; Qi et al. nqa tawm Mg / Al lap welding nrog qhov sib ntxiv ntawm cov ntaub ntawv mos hlau interlayer thiab pom tias qhov sib koom ua ke shear lub zog sib txawv nrog cov thickness ntawm interlayer, thiab lub zog shear nce thiab tom qab ntawd txo nrog qhov nce ntawm cov ntawv ci; Liu thiab Gao et al. nqa Mg / Al laser composite welding nrog qhov sib ntxiv ntawm nruab nrab interlayer, thiab pom tias Zn, Ce, thiab Ti muaj cov nyhuv ntawm inhibiting qhov tsim ntawm brittle Mg / Al compounds. Lub luag haujlwm ntawm Zn, Ce, Ti txhua tus muaj cov nyhuv ntawm inhibiting qhov tsim ntawm brittle Mg / Al compounds, uas Ti nrog siab melting thiab boiling cov ntsiab lus muaj ib tug zoo ntxim rau inhibiting tsim ntawm brittle Mg / Al tebchaw, tab sis lub mechanism. tsis meej; Ma Yucheng et al. tshawb xyuas qhov ua tau ntawm aluminium / steel lap welding nrog ntxiv ntawm Ni intermediate txheej; Wang et al. nqa tawm lub laser-arc composite fusion vuam ntawm magnesium / txhuas nrog qhov sib ntxiv ntawm Ni interlayer, thiab pom tias theem muaj pes tsawg leeg ntawm intermetallic tebchaw nyob rau hauv fusion zone Khodabakhshi li al. ua oscillating laser vuam ntawm AZ31 magnesium alloy phaj thiab 6022 aluminium alloy nrog Ni foil thiab pom tias oscillation ntawm lub laser beam txo kev sib koom ua ke tsim thiab txhim khu kev sib tov nyob rau hauv lub molten pas dej ua ke, thiab ntxiv ntawm Ni foil zoo inhibits cov tshuaj tiv thaiv ntawm Mg. thiab Al los ua ib qho nkig Mg / Al compound; Li Mingfeng et al. ua ultrasonic vuam ntawm AZ31B magnesium alloy phaj thiab txhuas alloy nrog hlau ntawv. Li Mingfeng et al. nqa tawm ultrasonic vuam ntawm AZ31B magnesium alloy phaj thiab aluminium alloy nrog ntxiv ntawm cov ntawv ci hlau, thiab pom tias qhov sib ntxiv ntawm Cu foil tiv thaiv kev tsim ntawm Mg / Al tebchaw, thiab feem ntau ntawm qhov chaw ntawm Mg / Cu so yog du; Zhang Shumai et al. nqa tawm laser vuam ntawm magnesium alloy / aluminium alloy nrog qhov sib ntxiv ntawm Ni foil, thiab pom tias qhov sib ntxiv ntawm Ni foil txwv qhov diffusion ntawm Al los ntawm txhuas rau hauv magnesium da dej, thiab txo qis cov tshuaj tiv thaiv ntawm Al thiab Mg los ua brittle Mg / Al compounds, thiab cov tshuaj tiv thaiv ntawm Ni thiab Al hauv thaj tsam ntawm lub pas dej ua ke tsim AlNi thiab AlNi. Tsis tas li ntawd, Ni nyob rau hauv lub pas dej ua ke reacts nrog Al los tsim Al-Ni tebchaw xws li AlNi thiab Al3Ni. Peng et al. nqa tawm ultrasonic welding ntawm magnesium alloys thiab aluminium alloys nrog ntxiv ntawm Ag foil thiab pom tias Ag foil cuam tshuam nrog Mg thiab Al los tiv thaiv cov tiam ntawm brittle Mg / Al tebchaw, thiab Mg / Al interface tau hloov los ntawm Mg / Ag. thiab Al/Ag interfaces. Los ntawm cov kev tshawb fawb uas twb muaj lawm ntawm Mg / Al vuam, qhov tseem ceeb cuam tshuam rau kev ua haujlwm ntawm Mg / Al pob qij txha yog cov nkig Mg / Al compounds. Txhawm rau txhim kho cov khoom ntawm Mg / Al pob qij txha, qhov tsim ntawm Mg / Al compounds feem ntau cuam tshuam los ntawm kev ua kom zoo dua cov txheej txheem vuam thiab siv cov khoom siv ntxiv. Nyob rau hauv qhov kev pom ntawm qhov teeb meem uas ua kua magnesium / txhuas yog nquag ua rau lub nkig Mg / Al tebchaw thiab txo cov khoom sib koom ua ke, daim ntawv no qhia txog cov tshuab laser vuam ntawm magnesium-on-aluminium sib tshooj thiab sib ntxiv ntawm Ti foil ntawm magnesium. /aluminium txheej rau vuam AZ31 magnesium alloy thiab 6061 aluminium alloy, thiab los kawm txog lub koom haum thiab cov khoom ntawm magnesium / aluminium welded pob qij txha nyob rau hauv qhov kev txiav txim ntawm titanium foil-laser, cov txiaj ntsig ntawm txoj kev tshawb fawb xav tias yuav muaj txiaj ntsig zoo rau kev nce qib. kev txhim kho ntawm cov khoom sib xyaw ua ke ua los ntawm cov khoom sib txawv hauv kev tsim khoom hauv aerospace. Cov txiaj ntsig ntawm txoj kev tshawb fawb no xav tias yuav muab lub tswv yim tshiab los txhawb kev siv cov txheej txheem sib xyaw ua ke hauv kev tsim khoom hauv aerospace.
AZ31 magnesium alloy thiab 6061 aluminium alloy tau welded los ntawm kev siv cov txheej txheem laser vuam ntawm magnesium-on-aluminium interface thiab ntxiv Ti foil ntawm magnesium / aluminium txheej los kawm cov qauv thiab cov khoom ntawm magnesium / aluminium fusion welded pob qij txha nyob rau hauv qhov kev txiav txim ntawm Ti foil. -laser, thiab cov lus xaus tseem ceeb yog raws li hauv qab no.
(1) Raws li cov txheej txheem ntawm lub zog laser ntawm 1600-1700 W, vuam ceev ntawm 1200 mm / min, laser taub hau deflection ntawm 20 degree, xoom defocus, thiab siv Ar tiv thaiv roj rau sab-blowing thiab rov qab- Kev tiv thaiv, qhov sib ntxiv ntawm Ti ntawv ci tuaj yeem ua tiav kev sib txuas zoo ntawm magnesium / aluminium, thiab magnesium / aluminium pob qij txha tuaj yeem ncav cuag lub zog shear (kab zog) ntawm 58 N / mm.
(2) Nrog rau qhov sib ntxiv ntawm Ti ntawv ci, lub pas dej ua ke morphology hloov los ntawm "V" duab yam tsis muaj Ti ntawv ci mus rau "kua iav" duab nrog Ti ntawv ci. Raws li cov tuab ntawm Ti ntawv ci nce, qhov tob ntawm lub pas dej ua ke ntawm magnesium / aluminium pob qij txha nce, thiab cov ntawv ci nyob ze ntawm txhuas sab ntawm lub substrate ib nrab melts, thiab cov ntsiab lus Ti tau faib rau hauv lub pas dej ua ke. Cov ntsiab lus Ti tau muab faib rau hauv lub pas dej ua ke thiab Ti3Al compounds yog tsim.
(3) Qhov sib ntxiv ntawm Ti foil inhibits kev sib cuag ncaj qha ntawm magnesium thiab txhuas thiab tiv thaiv cov tshuaj tiv thaiv ntawm Mg thiab Al los ua nkig Mg / Al compounds. Qhov sib ntxiv ntawm Ti ntawv ci muaj qhov cuam tshuam, tab sis cov thermal conductivity ntawm Ti ntawv ci yog qhov tsawg, thiab nws nyob deb ntawm lub laser tshav kub qhov chaw, yog li lub melting ntawm Ti ntawv ci yog tsis tiav, thiab kev sib txuas ntawm Ti ntawv ci nrog cov ntaub ntawv. cov khoom siv hauv paus yuav tsum tau txhim kho.
