(1) Ukushisela kwensimbi ne-aluminium nama-alloys ayo
I-ayoni, i-manganese, i-chromium, i-nickel nezinye izakhi zensimbi zingaxubana ne-aluminium esimweni esiwuketshezi ukuze zenze isisombululo esiqinile esilinganiselwe, futhi zenze izinhlanganisela ze-intermetallic. Ikhabhoni esensimbi nayo ingakha izinhlanganisela ne-aluminium, kodwa cishe ayihambisani nezinye esimweni esiqinile. chitha. Phakathi kokuqukethwe okuhlukile kwe-aluminium ne-iron, izinhlobonhlobo zezinhlanganisela ze-brittle intermetallic zingakhiwa, phakathi kwazo i-FeAls eyi-brittle kakhulu.
Inomthelela obalulekile ezintweni zemishini zamajoyini ashiselwe ensimbi ne-aluminium, okuhlanganisa ukuqina okuncane. Ngaphezu kwalokho, njengoba izakhiwo ze-thermophysical zensimbi, i-aluminium nama-alloys abo nazo zihluke kakhulu, ukushiselwa kwensimbi ne-aluminium kuyancipha.
(2) Inqubo yokushisela yensimbi ne-aluminium nama-alloys ayo
Kusukela ekuhlaziyweni okukhulunywe ngakho ngenhla kokushisela kwe-steel-aluminium, cishe akunakwenzeka ukunciphisa ukuncishiswa kwensimbi ne-aluminium nama-alloys ayo ngokushisela okuhlanganisiwe okuqondile.
Cishe akunakwenzeka ukusebenzisa insimbi noma i-alloy enezici zayo ezishisayo zomzimba eziphakathi kwensimbi ne-aluminium futhi ezingase zihambisane ne-metallurgical kokubili njengensimbi yokugcwalisa yokushisela okuqondile.
Ekukhiqizeni, kunezindlela ezimbili: ukushisela ungqimba olungaqondile lwe-fusion welding kanye ne-intermediate transition piece engaqondile ye-fusion welding.
1) Indlela yokushisela i-coating engaqondile Ngaphambi kokuba insimbi ne-aluminium kushiselwe, ungqimba olulodwa noma ezimbalwa zensimbi ezingahlanganiswa ngensimbi yokugcwalisa efanelekile zimbozwa ngaphambili phezu kwensimbi ukuze zakhe ungqimba lwangaphambili, bese kuthi emva kwalokho kufakwe ungqimba oluqinile lwensimbi. esetshenziswa Indlela yokushisela ye-gas tungsten arc Indlela yokushisela insimbi eboshwe ku-aluminium.
Kufakazelwe ngokuzijwayeza nokuhlola:
Isendlalelo esisodwa sokumboza singavimbela kuphela i-oxidation yensimbi eyisisekelo, kodwa ayikwazi ukuvimbela ukukhiqizwa kwezinhlanganisela ze-intermetallic, futhi amandla ayo ahlangene asephansi kakhulu. Ngakho-ke, i-argon arc welding yensimbi ne-aluminium kufanele yenziwe nge-coating eyinhlanganisela.
Kunezinto eziningi zensimbi zokugqoka, njenge-Ni, Cu, Ag, Sn, Zn njalonjalo. Izinto zensimbi zokumboza zihlukile, futhi umphumela ngemuva kwe-welding nawo uhlukile. Imifantu kulula ukwakha ku-Ni, Cu, Ag eyinhlanganisela enamathelayo; I-Ni, Cu, i-Sn eyinhlanganisela ye-coating ingcono; I-Ni, i-Zn eyinhlanganisela ye-Zn inomphumela omuhle kakhulu.
I-argon arc welding ye-composite coated carbon steel kanye ne-aluminium kanye nama-alloys ayo ukuqala ukumboza ungqimba lwensimbi njengethusi noma isiliva ohlangothini lwensimbi, bese umboza ungqimba lwezinc. Lapho i-welding, i-zinc iyancibilika kuqala (ngoba indawo encibilikayo yocingo lokushisela iphakeme kune-zinc), futhi intanta endaweni ewuketshezi.
I-aluminium isabela ngethusi noma i-plating yesiliva ngaphansi kongqimba lwezinc, futhi ngesikhathi esifanayo ithusi noma isiliva lincibilika ku-aluminium, okungakha inhlanganisela engcono eshiselwe. Ingakhuphula amandla ensimbi-aluminiyamu ahlanganisiwe ashiselwe ku-197~213MPa.
Ngemuva kokuthi izingxenye zensimbi ziboshwe, ubuso bensimbi ne-aluminium bungaphathwa. Ukwelashwa okungaphezulu kwezingxenye ze-aluminium kuguguleka ngesisombululo se-15% ~ 20% se-NaOH noma se-KOH sokususa ifilimu ye-oxide, ihlanjululwe ngamanzi ahlanzekile, bese idluliswa ku-20% HNO3, ihlanjululwe, futhi ilungele ukomisa Yenza i-argon arc welding.
Izinto zokushisela - khetha i-aluminium welding wire ehlanzekile enokuqukethwe kwe-silicon encane, ukuze kutholakale amalunga aphezulu. Akufanelekile ukusebenzisa i-magnesium-containing welding wire (LFS), ngoba izokhuthaza kakhulu ukukhula kwama-intermetallic compounds futhi ayikwazi ukuqinisekisa amandla okuhlanganiswa kwe-weld.
Indlela yokushisela - isikhundla esihlobene se-workpiece, i-welding wire kanye ne-tungsten electrode ngesikhathi sokushisela.
Ukuze uvimbele ukushiswa ngaphambi kwesikhathi kwensimbi yensimbi, lapho ufaka i-weld yokuqala, i-arc ye-welding kufanele ihlale igcinwe ensimbi yokugcwalisa; kuma-welds alandelayo, i-arc kufanele igcinwe ku-filler wire kanye ne-weld eyakhiwe, ukuze Ikwazi ukugwema i-arc ngokuqondile esebenza ekugqokeni.
Ngaphezu kwalokho, i-arc ihamba ngaphezu kohlangothi lwe-aluminium futhi ucingo lokushisela i-aluminium luhamba ngasohlangothini lwensimbi, ukuze i-aluminium ewuketshezi igeleze ifike endaweni eyingxube yensimbi ehlanganisiwe, futhi ukunamathela akukwazi ukushiswa ngaphambi kwesikhathi futhi kulahlekelwe. umphumela wawo.
Ukucaciswa kwe-Welding - i-argon arc welding yensimbi ne-aluminium isebenzisa amandla e-AC, enye iwukushaya ifilimu ye-oxide futhi iyiphule, futhi ingasusa ifilimu ye-oxide ebusweni bechibi elincibilikisiwe, ukuze insimbi encibilikisiwe yokushisela ingaba. kuhlanganiswe kahle.
I-welding current ikhethwa ngokuhambisana nobukhulu be-weldment. Ngokuvamile, lapho ukushuba kwepuleti kungu-3mm, i-welding current ingu-110-130A; lapho ukushuba kwepuleti kungu-6-8mm, i-welding current ingu-130-160A;
2) Indlela ye-welding ye-fusion engaqondile yezingcezu zenguquko eziphakathi. Le ndlela yokushisela iwukubeka iphaneli eliyinhlanganisela yensimbi ne-aluminium phakathi nendawo yensimbi ne-aluminium ukuze bakhe amalunga awo, okungukuthi, amalunga ensimbi-yensimbi kanye ne-aluminium-aluminium. Bese usebenzisa indlela evamile yokushisela i-fusion ukushisela insimbi efanayo emikhawulweni yomibili ngokulandelana.
Lapho ushisela, naka amalunga e-aluminium yokushisela anokuncipha okukhulu nokuqhekeka okushisayo okushisayo kuqala, bese kuba amajoyinti ensimbi yokushisela.
Isikhathi sokuthumela: Mar-22-2023
