1. Zitsanzo zogwiritsira ntchito
1) splicing board
M'zaka za m'ma 1960, kampani ya Toyota Motor Company idayamba kugwiritsa ntchito luso lopanda kanthu. Ndiko kulumikiza mapepala awiri kapena kuposerapo pamodzi ndi kuwotcherera kenako ndikudinda. Mapepalawa akhoza kukhala ndi makulidwe osiyanasiyana, zipangizo, ndi katundu. Chifukwa chakuchulukirachulukira kofunikira pakuyendetsa magalimoto ndi ntchito monga kupulumutsa mphamvu, kuteteza chilengedwe, chitetezo pamagalimoto, ndi zina zambiri, ukadaulo wowotcherera telala wakopa chidwi kwambiri. kuwotcherera mbale kutha kugwiritsa ntchito kuwotcherera pamalo, kuwotcherera kwa matako,laser kuwotcherera, kuwotcherera hydrogen arc, etc. Pakali pano,laser kuwotchereraamagwiritsidwa ntchito makamaka mu kafukufuku wakunja ndi kupanga osasoweka telala-weld.
Poyerekeza zotsatira za mayeso ndi kuwerengera, zotsatira zake zimagwirizana bwino, kutsimikizira kulondola kwa chitsanzo cha kutentha kwa kutentha. M'lifupi wa weld msoko pansi osiyana ndondomeko magawo anali masamu ndipo pang'onopang'ono wokometsedwa. Potsirizira pake, chiŵerengero cha mphamvu ya 2: 1 chinatengedwa, matabwa awiriwo anakonzedwa mofanana, mtengo waukulu wa mphamvu unali pakatikati pa msoko wowotcherera, ndipo mtengo wochepa wa mphamvu unali pa mbale yakuda. Ikhoza kuchepetsa weld m'lifupi. Pamene matabwa awiri ali madigiri 45 kuchokera kwa wina ndi mzake. Ikakonzedwa, mtengowo umagwira ntchito pa mbale yokhuthala ndi mbale yopyapyala motsatana. Chifukwa cha kuchepa kwamphamvu yowotchera m'mimba mwake, m'lifupi mwake weld imachepanso.
2) Aluminiyamu zitsulo zosiyanasiyana
Kafukufuku wamakono akuwonetsa zotsatirazi: (1) Pamene chiŵerengero cha mphamvu ya mtengo chikuwonjezeka, makulidwe a intermetallic pawiri mu malo omwewo a mawonekedwe a weld / aluminiyamu alloy amachepetsa pang'onopang'ono, ndipo kugawa kumakhala kokhazikika. Pamene RS = 2, makulidwe a mawonekedwe a IMC wosanjikiza ali pakati pa 5-10 microns. Kutalika kwakukulu kwa IMC yaulere ya "singano" ndi pakati pa ma microns 23. Pamene RS = 0.67, makulidwe a mawonekedwe a IMC wosanjikiza ali pansi pa ma microns 5, ndipo kutalika kwake kwa IMC yaulere "ngati singano" ndi 5.6 microns. The makulidwe a pawiri intermetallic kwambiri yafupika.
(2)Pamene parallel-beam laser imagwiritsidwa ntchito kuwotcherera, IMC pa mawonekedwe a weld/aluminium alloy imakhala yosakhazikika. Makulidwe a IMC pa mawonekedwe a weld/aluminiyamu aloyi pafupi ndi chitsulo/aluminiyamu aloyi olowa mawonekedwe ndi okhuthala, ndi makulidwe pazipita ma microns 23.7. . Pamene chiŵerengero cha mphamvu ya mtengo chikuwonjezeka, pamene RS = 1.50, makulidwe a IMC wosanjikiza pa weld / aluminiyamu aloyi mawonekedwe akadali wamkulu kuposa makulidwe a intermetallic pawiri m'dera lomwelo la siriyo wapawiri mtanda.
3. Aluminiyamu-lithiyamu aloyi T woboola pakati
Pankhani ya makina a laser welded joints of 2A97 aluminiyamu aloyi, ofufuza anafufuza microhardness, katundu wamanjenje ndi kutopa katundu. Zotsatira zoyeserera zikuwonetsa kuti: gawo la weld la cholumikizira cholumikizira cha 2A97-T3/T4 aluminiyamu aloyi amachepetsedwa kwambiri. Coefficient ili pafupi ndi 0.6, yomwe imagwirizana kwambiri ndi kusungunuka ndi zovuta zotsatila pakugwa kwa gawo lolimbikitsa; mphamvu ya coefficient ya 2A97-T4 aluminiyamu aloyi olowa welded ndi IPGYLR-6000 CHIKWANGWANI laser akhoza kufika 0,8, koma plasticity ndi otsika, pamene CHIKWANGWANI IPGYLS-4000laser kuwotchereraMphamvu ya mphamvu ya laser welded 2A97-T3 aluminiyamu aloyi mfundo ndi za 0,6; pore chilema ndi chiyambi cha kutopa ming'alu mu 2A97-T3 zotayidwa aloyi laser welded mfundo.
Munjira yofananira, malinga ndi ma crystal morphologies osiyanasiyana, FZ imapangidwa makamaka ndi makhiristo a columnar ndi makhiristo ofanana. Ma kristalo a columnar ali ndi epitaxial EQZ kukula kwake, ndipo mayendedwe awo amakula molunjika pamzere wophatikizika. Izi zili choncho chifukwa pamwamba pa njere ya EQZ ndi tinthu tating'onoting'ono ta nucleation, ndipo kutentha kwa mbali iyi ndikothamanga kwambiri. Chifukwa chake, mzere woyamba wa crystallographic wa mzere wophatikizika woyima umakula bwino ndipo mbali zake zimakhala zoletsedwa. Pamene makhiristo a columnar amakula chapakati pa weld, structural morphology kusintha ndi columnar dendrites amapangidwa. Pakati pa weld, kutentha kwa dziwe losungunuka ndilokwera kwambiri, kutentha kwa kutentha kumakhala kofanana kumbali zonse, ndipo mbewu zimakula mofanana kumbali zonse, kupanga ma dendrites ofanana. Pamene crystallographic axis ya equiaxed dendrites imakhala yofananira ndendende ndi ndege yachitsanzo, njere zooneka ngati maluwa zimatha kuwonedwa mu gawo la metallographic. Kuphatikiza apo, zomwe zimakhudzidwa ndi kuzizira kwakukulu kwa zigawo zakomweko mu weld zone, magulu owotcherera bwino nthawi zambiri amawonekera m'dera la seam ya synchronous mode T woboola pakati, ndipo kapangidwe kambewu mu bandi yosakanikirana bwino ndi yosiyana ndi. Mtengo wa EQZ. Maonekedwe omwewo. Chifukwa Kutenthetsa ndondomeko ya heterogeneous mode TSTB-LW ndi yosiyana ndi ya synchronous mode TSTB-LW, pali kusiyana koonekeratu mu macromorphology ndi microstructure morphology. Cholumikizira chowoneka ngati cha TSTB-LW T chakumana ndi mikombero iwiri yotentha, kuwonetsa dziwe losungunuka lawiri. Pali mzere wodziwikiratu wachiwiri wophatikizika mkati mwa weld, ndipo dziwe losungunuka lomwe limapangidwa ndi kuwotcherera kwa matenthedwe ndi laling'ono. Mu njira yosasinthika ya TSTB-LW, kulowetsedwa kozama kumakhudzidwa ndi kutentha kwa kutentha kwa matenthedwe. Ma dendrites a columnar ndi equiaxed dendrites omwe ali pafupi ndi mzere wachiwiri wophatikizika amakhala ndi malire ochepa a subgrain ndipo amasandulika kukhala makristasi a columnar kapena ma cell, kusonyeza kuti Kutentha kwa kutentha kwa kutentha kwa kutentha kumakhala ndi kutentha kwa kutentha pazitsulo zozama zolowera. Ndipo kukula kwa njere ya dendrites pakati pa thermally conductive weld ndi 2-5 microns, yomwe ndi yaying'ono kwambiri kuposa kukula kwa njere ya dendrites pakatikati pa kulowera kwakuya (5-10 microns). Izi makamaka zokhudzana ndi kutentha kwakukulu kwa ma welds kumbali zonse ziwiri. Kutentha kumayenderana ndi kuzizira kotsatira.
3) Mfundo yawiri-mtengo laser ufa cladding kuwotcherera
4)Mkulu solder olowa mphamvu
Mu kuyesa kwapawiri kwa laser powder deposition kuwotcherera, popeza matabwa awiri a laser amagawidwa mbali ndi mbali mbali zonse za waya wa mlatho, mitundu ya laser ndi gawo lapansi ndilokulirapo kuposa la single-mtengo laser powder deposition kuwotcherera, ndipo chifukwa cha solder olowa ndi ofukula kwa waya mlatho. Mawaya amalowera pang'onopang'ono. Chithunzi 3.6 chikuwonetsa zolumikizira zogulitsira zomwe zimapezedwa ndi mtengo umodzi wowotcherera wamafuta awiri ndi laser. Pa kuwotcherera ndondomeko, kaya ndi iwiri mtandalaser kuwotchereranjira kapena mtengo umodzilaser kuwotchereraNjira, dziwe linalake losungunuka limapangidwa pazitsulo zapansi kupyolera mu kuyendetsa kutentha. Mwanjira imeneyi, zitsulo zosungunuka zachitsulo mu dziwe losungunuka zimatha kupanga mgwirizano wazitsulo ndi ufa wosungunula wokha-fluxing, potero kukwaniritsa kuwotcherera. Mukamagwiritsa ntchito laser yapawiri-mtengo pakuwotcherera, kuyanjana pakati pa mtengo wa laser ndi zinthu zoyambira ndikulumikizana pakati pa madera a matabwa awiri a laser, ndiko kuti, kulumikizana pakati pa maiwe awiri osungunuka opangidwa ndi laser pazinthuzo. . Mwanjira imeneyi, kusakanikirana kwatsopano komwe kumachokera Malowa ndi aakulu kuposa a mtengo umodzilaser kuwotcherera, kotero zolumikizira solder akapeza awiri-mtengolaser kuwotchererandi amphamvu kuposa mtengo umodzilaser kuwotcherera.
2. High solderability ndi repeatability
Mu gulu limodzilaser kuwotchererakuyesera, popeza pakati pa malo omwe amayang'ana pa laser imagwira ntchito mwachindunji pawaya yaying'ono-mlatho, waya wa mlatho uli ndi zofunika kwambirilaser kuwotchereramagawo ndondomeko, monga m'goli laser mphamvu kachulukidwe kugawa ndi osagwirizana aloyi ufa makulidwe. Izi zipangitsa kuti mawaya athe kusweka panthawi yowotcherera komanso ngakhale mwachindunji kupangitsa kuti waya wa mlatho usungunuke. Mu njira yowotcherera ya laser yokhala ndi mipanda iwiri, popeza malo olunjika a matabwa awiri a laser samachita mwachindunji pa mawaya ang'onoang'ono a mlatho, zofunikira zolimba za magawo a laser kuwotcherera kwa mawaya a mlatho zimachepetsedwa, ndikuwotcherera komanso kubwereza kumawonjezeka kwambiri. .
Nthawi yotumiza: Oct-17-2023
