Kana uchibatanidza simbi nealuminium, kuita pakati peFe neAl maatomu panguva yekubatanidza kunoumba brittle intermetallic compounds (IMCs). Kuvepo kweaya maIMC anodzikamisa simba remagetsi rekubatanidza, saka zvinodikanwa kudzora huwandu hwemakomponi aya. Chikonzero chekuumbwa kweIMCs ndechekuti solubility yeFe muAl haina kunaka. Kana ikadarika imwe chiyero, inogona kukanganisa mechanical properties ye weld. IMCs ine yakasarudzika zvimiro senge kuoma, kushoma ductility uye kuoma, uye morphological maficha. Tsvagiridzo yakawana kuti kana ichienzaniswa nemamwe maIMC, iyo Fe2Al5 IMC layer inoonekwa zvakanyanya seyakanyanya brittle (11.8)± 1.8 GPa) IMC chikamu, uye zvakare ndicho chikonzero chikuru chekudzikira kwemakanika zvivakwa nekuda kwekutadza kwewelding. Iri bepa rinoongorora iyo iri kure laser welding process yeIF simbi uye 1050 aluminium ichishandisa inogadziriswa ring mode laser, uye inoongorora zvakadzama kurudziro yelaser beam shape pakuumbwa kweintermetallic compounds uye mechanical properties. Nekugadzirisa iyo core / ring simba reshiyo, zvakaonekwa kuti pasi pe conduction mode, core / ring simba reshiyo ye0.2 inogona kuwana zvirinani weld interface bonding nzvimbo uye zvakanyanya kuderedza ukobvu hweFe2Al5 IMC, nekudaro ichivandudza kugera kwesimba remubatanidzwa. .
Ichi chinyorwa chinosuma pesvedzero yeinogadziriswa ring mode laser pakuumbwa kweiyo intermetallic compounds uye mechanical properties panguva iri kure laser welding yeIF simbi uye 1050 aluminium. Mhedzisiro yetsvagiridzo inoratidza kuti pasi pekuita maitiro, core / ring simba reshiyo ye0.2 inopa yakakura weld interface bonding nzvimbo, iyo inoratidzwa nehukuru hweshear simba re97.6 N/mm2 (joint performance ye71%). Mukuwedzera, zvichienzaniswa neGaussian matanda ane simba reshiyo yakakura kudarika 1, izvi zvinoderedza zvakanyanya kukora kweFe2Al5 intermetallic compound (IMC) ne62% uye iyo yose IMC ukobvu ne40%. Mune perforation mode, kuputika uye kuderera kweshear simba zvakaonekwa zvichienzaniswa nemaitiro ekuitisa. Zvakakosha kucherechedza kuti kukwenenzvera kwezviyo kwakaonekwa mumusono we weld apo chiyero chepakati/mhete simba chaive 0.5.
Kana r = 0, simba rechiuno chete rinogadzirwa, nepo kana r = 1, simba repakati chete rinogadzirwa.
Schematic dhayagiramu yesimba reshi r pakati peGaussian danda uye annular danda
(a) Welding mudziyo; (b) Hudzamu nehupamhi hweiyo weld profile; (c) Schematic dhizaini yekuratidzira sampuli uye zvigadziriso zvigadziriso
MC bvunzo: Chete muchiitiko cheGaussian danda, iyo weld musono inotanga mune isina kudzika conduction modhi (ID 1 uye 2), uyezve shanduko kune zvishoma inopinda mukati mekuvhara muoti (ID 3-5), ine mitswe iri pachena ichioneka. Apo simba remhete rakawedzera kubva pa 0 kusvika ku 1000 W, pakanga pasina kutsemuka kwakajeka pa ID 7 uye kudzika kwehupfumi hwesimbi kwaive kuduku. Kana simba remhete richiwedzera kusvika 2000 uye 2500 W (IDs 9 ne10), kudzika kwenzvimbo yakapfuma yesimbi kunowedzera. Kunyanya kutsemuka pa2500w mhete simba (ID 10).
MR bvunzo: Kana simba repakati riri pakati pe500 ne1000 W (ID 11 ne12), weld seam iri mu conduction mode; Kuenzanisa ID 12 uye ID 7, kunyangwe iyo yakazara simba (6000w) yakafanana, ID 7 inoshandisa yekukiya gomba modhi. Izvi zvinokonzerwa nekudzikira kwakanyanya kwesimba remagetsi paID 12 nekuda kweiyo inotungamira loop hunhu (r=0.2). Apo simba rose rinosvika 7500 W (ID 15), nzira yakazara yekupinda inogona kuwanikwa, uye kana ichienzaniswa ne6000 W inoshandiswa muD ID 7, simba rekuzara kwekupinda mode rinowedzera zvakanyanya.
IC bvunzo: Yakaitiswa modhi (ID 16 uye 17) yakawanikwa pa1500w musimboti simba uye 3000w uye 3500w mhete simba. Kana simba repakati rave 3000w uye simba remhete riri pakati pe1500w ne2500w (ID 19-20), mitswe iri pachena inooneka painterface pakati pesimbi yakapfuma nearuminiyamu yakapfuma, ichigadzira nharaunda inopinda mugomba diki pateni. Kana simba remhete riri 3000 uye 3500w (ID 21 uye 22), ita zvizere kupinda keyhole mode.
Inomiririra muchinjika-chikamu mifananidzo yekuzivikanwa yega yega welding pasi peiyo optical microscope
Mufananidzo 4. (a) Ukama huri pakati pekupedzisira tensile simba (UTS) uye simba reshiyo mune welding miedzo; (b) Iyo yakazara simba reese maedzo ewelding
Mufananidzo 5. (a) Ukama pakati pehuwandu hwehuwandu neUTS; (b) Hukama pakati pekuwedzera uye kudzika kwekupinda uye UTS; (c) Simba density kune ese welding bvunzo
Mufananidzo 6. (ac) Vickers microhardness indentation contour mepu; (df) Inopindirana SEM-EDS kemikari spectra yemumiririri conduction mode welding; (g) Schematic dhizaini yekubatana pakati pesimbi nealuminium; (h) Fe2Al5 uye yakazara IMC ukobvu hwe conductive modhi welds
Mufananidzo 7. (ac) Vickers microhardness indentation contour mepu; (df) Inopindirana SEM-EDS kemikari spectrum yemumiririri wenzvimbo yekupinda perforation mode welding
Mufananidzo 8. (ac) Vickers microhardness indentation contour mepu; (df) Inopindirana SEM-EDS kemikari spectrum yemumiririri yakazara penetration perforation mode welding
Mufananidzo 9. EBSD chirongwa chinoratidza saizi yezviyo yedare rakapfuma dunhu (yepamusoro ndiro) mune yakazara penetration perforation mode bvunzo, uye quantifies tsanga saizi kugoverwa.
Mufananidzo 10. SEM-EDS spectra of the interface pakati pehupfumi hwesimbi uye hupfumi hwealuminium
Ichi chidzidzo chakaongorora mhedzisiro yeARM laser pakuumbwa, microstructure, uye michina zvimiro zveIMC muIF simbi-1050 aluminium alloy dissimilar lap welded joints. Chidzidzo ichi chakafunga nzira nhatu dzewelding (mafambisirwo emaitiro, yenzvimbo yekupinda modhi, uye yakazara yekupinda modhi) uye matatu akasarudzwa laser danda maumbirwo (Gaussian danda, annular danda, uye Gaussian annular danda). Mhedzisiro yetsvagiridzo inoratidza kuti kusarudza iyo yakakodzera simba reshiyo yeGaussian danda uye annular danda ndiyo yakakosha parameter yekudzora kuumbwa uye microstructure yemukati modal kabhoni, nekudaro kuwedzera ma mechanic properties ye weld. Mune conduction mode, denderedzwa danda rine simba reshiyo ye0.2 inopa yakanakisa welding simba (71% kubatana kushanda zvakanaka). Mune iyo perforation modhi, iyo Gaussian danda inogadzira yakakura welding kudzika uye yakakwirira chikamu chechiyero, asi iyo welding intensity yakaderedzwa zvakanyanya. Iyo annular beam ine simba reshiyo ye0.5 ine mhedzisiro yakakosha pakunatswa kwesimbi yedivi tsanga mu weld seam. Izvi zvinokonzerwa nekudzikira kwepamusoro tembiricha ye annular beam inotungamira kukurumidza kutonhora mwero, uye kukura kunodzora mhedzisiro yeAl solute migration yakananga kuchikamu chepamusoro che weld seam pane chimiro chezviyo. Pane kuwirirana kwakasimba pakati peVickers microhardness uye Thermo Calc's kufanotaura kwechikamu vhoriyamu muzana. Iyo yakakura huwandu hwehuwandu hweFe4Al13, iyo yakakwira iyo microhardness.
Nguva yekutumira: Jan-25-2024
