Xa udibanisa intsimbi kwi-aluminiyam, ukusabela phakathi kwe-athomu ye-Fe kunye ne-Al ngexesha lenkqubo yokudibanisa yenza i-brittle intermetallic compounds (IMCs). Ubukho bezi IMCs bunciphisa amandla omatshini woqhagamshelo, ngoko ke kuyimfuneko ukulawula ubuninzi bezi khompawundi. Isizathu sokuqulunqwa kwe-IMCs kukuba ukunyibilika kwe-Fe e-Al kubi. Ukuba idlula inani elithile, inokuchaphazela iimpawu zemishini ye-weld. Ii-IMCs zineempawu ezizodwa ezifana nobulukhuni, ukuqina okulinganiselweyo kunye nokuqina, kunye neempawu ze-morphological. Uphando lufumene ukuba xa kuthelekiswa nezinye ii-IMCs, i-Fe2Al5 IMC layer ibonwa ngokubanzi njengeyona brittle (11.8)± 1.8 GPa) isigaba se-IMC, kwaye sesona sizathu siphambili sokuhla kweempawu zoomatshini ngenxa yokungaphumeleli kwe-welding. Eli phepha liphanda inkqubo ye-laser ye-welding ekude ye-IF yensimbi kunye ne-aluminium ye-1050 usebenzisa i-laser yemowudi ehlengahlengiswayo, kwaye iphanda nzulu impembelelo ye-laser beam shape ekubunjweni kwe-intermetallic compounds kunye neempawu zomatshini. Ngokulungelelanisa umlinganiselo we-core / ring power ratio, kwafunyaniswa ukuba phantsi kwemowudi yokuqhuba, umlinganiselo we-core / ring power ratio ye-0.2 unokufikelela kwindawo engcono yokudibanisa i-weld interface kunye nokunciphisa kakhulu ubukhulu be-Fe2Al5 IMC, ngaloo ndlela iphucula amandla okucheba komdibaniso. .
Eli nqaku lizisa impembelelo ye-laser ye-adjustable ring mode ekubunjweni kwe-intermetallic compounds kunye neempawu zomatshini ngexesha le-laser welding ye-IF steel kunye ne-1050 aluminium. Iziphumo zophando zibonisa ukuba phantsi kwemowudi yokuqhuba, umlinganiselo wamandla ongundoqo / wendandatho ye-0.2 ubonelela ngommandla omkhulu we-weld interface bonding surface, ebonakaliswa ngamandla amakhulu okucheba kwe-97.6 N / mm2 (ukusebenza ngokudibeneyo kwe-71%). Ukongeza, xa kuthelekiswa nemiqadi yeGaussian enomlinganiselo wamandla angaphezu kwe-1, oku kunciphisa kakhulu ubukhulu be-Fe2Al5 intermetallic compound (IMC) nge-62% kunye nobukhulu be-IMC obupheleleyo ngama-40%. Kwimo ye-perforation, ukuqhekeka kunye namandla okucheba aphantsi kwabonwa xa kuthelekiswa nemodi yokuqhuba. Kubalulekile ukuqaphela ukuba ukulungiswa okubalulekileyo okuziinkozo kwabonwa kwi-weld seam xa umlinganiselo wamandla ongundoqo / wesangqa wawuyi-0.5.
Xa r=0, kuphela amandla e-loop enziwayo, ngelixa xa r=1, kuphela amandla angundoqo enziwayo.
I-Schematic diagram yomlinganiselo wamandla r phakathi kwe-Gaussian beam kunye ne-annular beam
(a) isixhobo sokuwelda; (b) Ubunzulu nobubanzi beprofayili yeweld; (c) Idayagram yeskim yokubonisa iisampulu kunye nesetingi
uvavanyo MC: Kuphela kwimeko Gaussian umqadi, umthungo weld ekuqaleni ikwimowudi conduction nzulu (ID 1 kunye 2), kwaye emva koko utshintsho ukuya ngokuyinxenye imowudi lockhole (ID 3-5), kunye neentanda ezicacileyo ezibonakala. Xa amandla e-ring anda ukusuka kwi-0 ukuya kwi-1000 W, kwakungekho zintanda ezicacileyo kwi-ID ye-7 kwaye ubunzulu bentsimbi yokutyebisa yayincinci. Xa amandla e-ring enyuka ukuya kwi-2000 kunye ne-2500 W (i-ID 9 kunye ne-10), ubunzulu bommandla osisityebi buyanda. Ukuqhekeka okugqithisileyo kwi-2500w amandla e-ring (ID 10).
Uvavanyo lwe-MR: Xa amandla angundoqo aphakathi kwe-500 kunye ne-1000 W (ID 11 kunye ne-12), i-weld seam ikwimo yokuqhuba; Ukuthelekisa i-ID ye-12 kunye ne-ID yesi-7, nangona amandla ewonke (6000w) afana, i-ID ye-7 isebenzisa imodi yokutshixa. Oku kungenxa yokuncipha okubonakalayo koxinaniso lwamandla kwi-ID 12 ngenxa yeempawu zelophu ebalaseleyo (r=0.2). Xa amandla apheleleyo afikelela kwi-7500 W (ID 15), imodi yokungena epheleleyo inokufezekiswa, kwaye xa kuthelekiswa ne-6000 W esetyenziswe kwi-ID ye-7, amandla emodi yokungena ngokupheleleyo ayanda kakhulu.
Uvavanyo lwe-IC: Imodi eqhutywe (i-ID 16 kunye ne-17) iphunyezwe kumandla angundoqo we-1500w kunye ne-3000w kunye ne-3500w amandla e-ring. Xa amandla core 3000w kunye namandla ring phakathi 1500w kunye 2500w (ID 19-20), iintanda ezicacileyo zivela ujongano phakathi kwentsimbi etyebileyo kunye ne-aluminiyam etyebileyo, isenza ipateni yomngxuma omncinane ogqobhozayo. Xa amandla e-ring yi-3000 kunye ne-3500w (i-ID 21 kunye ne-22), ukufikelela kwimodi yokungena ngokupheleleyo.
Imifanekiso emele i-cross-sectional yokuchonga nganye ye-welding phantsi kwe-microscope ebonakalayo
Umzobo 4. (a) Ubudlelwane phakathi kwamandla okugqibela (i-UTS) kunye nomlinganiselo wamandla kwiimvavanyo ze-welding; (b) Amandla ewonke azo zonke iimvavanyo ze-welding
Umzobo 5. (a) Ubudlelwane phakathi kwe-aspect ratio kunye ne-UTS; (b) Ubudlelwane phakathi kokwandiswa kunye nobunzulu bokungena kunye ne-UTS; (c) Ukuxinana kwamandla kuzo zonke iimvavanyo ze-welding
Umfanekiso 6. (ac) Imephu yecontour yeVickers microhardness; df (g) Umzobo weSchematic of the interface phakathi kwentsimbi kunye ne-aluminiyam; (h) I-Fe2Al5 kunye nobukhulu be-IMC bubonke beendlela zokuqhuba
Umfanekiso 7. (ac) Vickers microhardness indentation imaphu yecontour; df
Umfanekiso 8. (ac) Imephu yecontour yeVickers microhardness; df
Umzobo 9. Ibali le-EBSD libonisa ubungakanani beenkozo zommandla otyebileyo wentsimbi (ipleyiti ephezulu) kuvavanyo lwemowudi yokugqobhoza ngokupheleleyo, kwaye ibala ubungakanani bokuhanjiswa kobungakanani beenkozo.
Umzobo 10. I-SEM-EDS i-spectra ye-interface phakathi kwentsimbi ecebileyo kunye ne-aluminium ecebileyo
Olu phononongo luphande imiphumo ye-laser ye-ARM ekubunjweni, kwi-microstructure, kunye neempawu zoomatshini ze-IMC kwi-IF steel-1050 aluminium alloy dissimilar lap welded joints. Uphononongo luqwalasele iindlela ezintathu zokuwelda (imowudi yokuqhuba, imowudi yokungena kwendawo, kunye nemowudi yokungena ngokupheleleyo) kunye neemilo ezintathu ezikhethiweyo ze-laser beam (i-Gaussian beam, i-annular beam, kunye ne-Gaussian annular beam). Iziphumo zophando zibonisa ukuba ukukhetha umlinganiselo ofanelekileyo wamandla we-Gaussian beam kunye ne-annular beam yiparameter ephambili yokulawula ukubunjwa kunye ne-microstructure yekhabhoni ye-modal yangaphakathi, ngaloo ndlela iphakamisa iipropati zomatshini we-weld. Kwimodi yokuqhuba, i-beam yesetyhula kunye nomlinganiselo wamandla we-0.2 inika amandla angcono kakhulu e-welding (71% ukusebenza ngokubambisana). Kwimowudi yokugqobhoza, umqadi weGaussian uvelisa ubunzulu obukhulu be-welding kunye ne-aspect ratio ephezulu, kodwa ukuqina kwe-welding kuncitshiswe kakhulu. Umbhobho we-annular kunye nomlinganiselo wamandla we-0.5 unempembelelo ebalulekileyo ekuphuculweni kweenkozo zensimbi kwi-weld seam. Oku kungenxa yobushushu obusezantsi bencopho yomqadi we-annular ekhokelela kwisantya sokupholisa esikhawulezayo, kunye nesiphumo sothintelo lokukhula kwemfuduko ye-Al solute ukuya kwindawo ephezulu ye-weld seam kulwakhiwo lweenkozo. Kukho unxulumano olomeleleyo phakathi kweVickers microhardness kunye nengqikelelo yeThermo Calc yomthamo wepesenti yesigaba. Ipesenteji yomthamo omkhulu we-Fe4Al13, iphezulu i-microhardness.
Ixesha lokuposa: Jan-25-2024
