I ka hoʻohui ʻana i ke kila me ka aluminika, ʻo ka pane ʻana ma waena o Fe a me Al atoms i ka wā o ke kaʻina hoʻohui i hana i nā pūhui intermetallic brittle (IMCs). ʻO ka heleʻana o kēia mau IMC e kaupalena i ka ikaika mechanical o ka pilina, no laila pono e hoʻomalu i ka nui o kēia mau pūhui. ʻO ke kumu o ka hoʻokumu ʻana o nā IMC ʻo ka solubility o Fe ma Al he ʻilihune. Inā ʻoi aku ka nui o ka nui, hiki ke hoʻopilikia i nā waiwai mechanical o ka weld. Loaʻa i nā IMC nā waiwai kūʻokoʻa e like me ka paʻakikī, ka ductility palena a me ka paʻakikī, a me nā hiʻohiʻona morphological. Ua ʻike ʻia ka noiʻi ʻana i hoʻohālikelike ʻia me nā IMC ʻē aʻe, ʻo ka papa Fe2Al5 IMC i manaʻo nui ʻia ʻo ia ka palupalu loa (11.8± 1.8 GPa) IMC pae, a ʻo ia ke kumu nui o ka emi ʻana o nā waiwai mechanical ma muli o ka pau ʻole o ka welding. Ke noiʻi nei kēia pepa i ke kaʻina hana kuʻihao laser mamao o ke kila IF a me 1050 aluminika me ka hoʻohana ʻana i ka laser mode ring adjustable, a noiʻi hohonu i ka mana o ke ʻano kukuna laser ma ke kūkulu ʻana i nā pūhui intermetallic a me nā waiwai mechanical. Ma ka hoʻololi ʻana i ka ratio o ka mana kumu / apo, ua ʻike ʻia ma lalo o ke ʻano conduction, hiki i kahi lākiō o ke kumu / apo mana o 0.2 ke hoʻokō maikaʻi loa i ka weld interface hoʻopaʻa ʻana i ka ʻāina a hoʻemi nui i ka mānoanoa o Fe2Al5 IMC, a laila e hoʻomaikaʻi ai i ka ikaika shear o ka hui. .
Hōʻike kēia ʻatikala i ka mana o ka laser mode ring adjustable i ka hoʻokumu ʻana i nā pūhui intermetallic a me nā waiwai mechanical i ka wā wili laser mamao o IF steel a me 1050 aluminika. Hōʻike nā hualoaʻa noiʻi ma lalo o ke ʻano conduction, ʻo kahi lākiō mana kumu / apo o 0.2 e hāʻawi i kahi ʻāpana hoʻopaʻa hoʻopaʻa weld ʻoi aku ka nui, i hōʻike ʻia e ka ikaika shear kiʻekiʻe o 97.6 N/mm2 (hoʻohana hui ʻana o 71%). Eia kekahi, i ka hoʻohālikelike ʻia me nā kukui Gaussian me ka lakene mana ʻoi aku ka nui ma mua o 1, hoʻemi nui kēia i ka mānoanoa o Fe2Al5 intermetallic compound (IMC) e 62% a me ka nui o ka mānoanoa IMC e 40%. Ma ke ʻano perforation, ua ʻike ʻia nā māwae a me ka ikaika ʻoki haʻahaʻa i hoʻohālikelike ʻia me ke ʻano conduction. He mea pono ke hoʻomaopopo ʻia ua ʻike ʻia ka hoʻomaʻemaʻe ʻana i ka palaoa nui i ka weld seam i ka manawa o ka lākiō o ka mana kumu / apo he 0.5.
I ka r = 0, hana ʻia ka mana loop wale nō, a i ka wā r = 1, hana ʻia ka mana kumu wale nō.
Kiʻikuhi kiʻi o ka lākiō mana r ma waena o ka lāʻau Gaussian a me ka lālani annular
(a) Mea hana wiliwili; (b) Ka hohonu a me ka laula o ka weld profile; (c) Kiʻikuhi kiʻi o ka hōʻike ʻana i ka laʻana a me nā hoʻonohonoho paʻa
Ho'āʻo MC: Ma ka hihia o Gaussian beam wale nō, ʻo ka weld seam i ka mua ma ke ʻano conduction pāpaʻu (ID 1 a me 2), a laila hoʻololi i ke ʻano kīwaha komo ʻāpana (ID 3-5), me ka ʻike ʻia ʻana o nā māwae. I ka piʻi ʻana o ka mana apo mai 0 a 1000 W, ʻaʻohe māwae ʻikea ma ID 7 a he liʻiliʻi ka hohonu o ka hoʻonui ʻana i ka hao. Ke piʻi ka mana apo i 2000 a me 2500 W (IDs 9 a me 10), piʻi ka hohonu o ka ʻāpana hao waiwai. Ka pohā nui ma ka mana apo 2500w (ID 10).
Ho'āʻo MR: Aia ka mana kumu ma waena o 500 a me 1000 W (ID 11 a me 12), aia ka weld seam i ke ʻano conduction; Ke hoʻohālikelike nei i ka ID 12 a me ka ID 7, ʻoiai ʻo ka mana holoʻokoʻa (6000w) he like ia, hoʻokomo ʻo ID 7 i kahi mode puka laka. Ma muli o ka emi nui ʻana o ka puʻupuʻu mana ma ID 12 ma muli o ke ʻano o ka loop loumana (r=0.2). Ke piʻi ka mana holoʻokoʻa i 7500 W (ID 15), hiki ke hoʻokō ʻia ke ʻano komo komo piha, a hoʻohālikelike ʻia me ka 6000 W i hoʻohana ʻia ma ID 7, ua hoʻonui nui ʻia ka mana o ke ʻano holo piha.
Ho'āʻo IC: Ua hoʻokō ʻia ke ʻano hana (ID 16 a me 17) ma ka mana kumu 1500w a me ka mana apo 3000w a me 3500w. Ke 3000w ka mana kumu a aia ka mana apo ma waena o 1500w a me 2500w (ID 19-20), ʻike ʻia nā māwae ma ke kikowaena ma waena o ka hao waiwai a me ka alumini waiwai, e hana ana i kahi kumu puka liʻiliʻi kūloko. Ke 3000 a me 3500w ka mana apo (ID 21 a me 22), e hoʻokō i ke ʻano keyhole holo piha.
ʻO nā kiʻi kūʻokoʻa o kēlā me kēia ʻike kuʻi ʻana ma lalo o kahi microscope optical
Kiʻi 4. (a) ʻO ka pilina ma waena o ka ikaika tensile hope (UTS) a me ka lākiō mana i nā hoʻokolohua kuʻi; (b) Ka nui o ka mana o nā ho'āʻo wiliwili a pau
Kiʻi 5. (a) Ka pilina ma waena o ka lākiō hiʻohiʻona a me ka UTS; (b) Ka pilina ma waena o ka hoʻonui a me ka hohonu komo a me ka UTS; (c) Ka nui o ka mana no nā ho'āʻo wiliwili
Kiʻi 6. (ac) Vickers microhardness indentation contour map; (df) E like me ka SEM-EDS spectra kemika no ka wiliwili ʻana i ke ʻano conduction; (g) Diagram Schematic o ka pilina ma waena o ke kila a me ka alumini; (h) Fe2Al5 a me ka huina IMC mānoanoa o nā welds mode conductive
Kiʻi 7. (ac) Vickers microhardness indentation contour palapala; (df) E like me SEM-EDS spectrum kemika no ka wiliwili ʻana i ke ʻano hoʻoheheʻe kūloko kūloko
Kiʻi 8. (ac) Vickers microhardness indentation contour palapala; (df) E like me SEM-EDS spectrum kemika no ka hōʻike piha ʻana i ke ʻano hoʻoheheʻe ʻana i ke ʻano
Kiʻi 9. Hōʻike ka ʻāpana EBSD i ka nui o ka ʻāpana hao waiwai (pā luna) i ka hoʻāʻo ʻana i ke ʻano perforation mode piha, a helu i ka puʻunaue nui o ka palaoa.
Kiʻi 10. SEM-EDS spectra o ka pilina ma waena o ka hao waiwai a me ka alumini waiwai
Ua noiʻi kēia haʻawina i nā hopena o ka laser ARM ma ka hoʻokumu ʻana, microstructure, a me nā waiwai mechanical o IMC ma IF steel-1050 alumini alumini hui like ʻole. Ua noʻonoʻo ka haʻawina i ʻekolu mau ʻano kuʻihao (ke ʻano conduction, mode penetration kūloko, a me ke ʻano komo piha) a me ʻekolu mau ʻano kukuna laser i koho ʻia (Gaussian beam, annular beam, a me Gaussian annular beam). Hōʻike nā hopena noiʻi i ke koho ʻana i ka lakene mana kūpono o ka beam Gaussian a me ka annular beam he mea nui ia no ka hoʻomalu ʻana i ka hoʻokumu ʻana a me ka microstructure o ke kalapona modal kūloko, a laila e hoʻonui i nā waiwai mechanical o ka weld. Ma ke ʻano conduction, hāʻawi ʻia kahi kukui pōʻai me ka lakene mana o 0.2 i ka ikaika wili maikaʻi loa (71% hui pū). Ma ke ʻano perforation, hoʻopuka ka Gaussian beam i ka hohonu kuʻi ʻana a me ka lākiō hiʻohiʻona kiʻekiʻe, akā ua hoʻemi nui ʻia ka ikaika kuʻi. ʻO ka annular beam me ka lakene mana o 0.5 he hopena koʻikoʻi i ka hoʻomaʻemaʻe ʻana i nā ʻāpana ʻaoʻao kila i ka weld seam. ʻO kēia ma muli o ka haʻahaʻa haʻahaʻa kiʻekiʻe o ka annular beam e alakaʻi ana i ka wikiwiki o ka hoʻomaha ʻana, a me ka hopena kaohi o ka ulu ʻana o ka neʻe ʻana o Al solute i ka ʻaoʻao o luna o ka weld seam ma ka hale palaoa. Aia kahi pilina ikaika ma waena o Vickers microhardness a me Thermo Calc wānana no ka pākēneka o ka leo māhele. ʻO ka nui o ka pākēneka leo o Fe4Al13, ʻoi aku ka kiʻekiʻe o ka microhardness.
Ka manawa hoʻouna: Jan-25-2024
