Argon tjheseletsa ya aluminium: eng ho rarahana ya

Taba ea ho fetisisa mekhoa a fumaneha tjheseletsa ya aluminium foromo e hloekileng 'me lits'epe tse kopantsoeng tsa lona tse sa tšoaneng haholo tshwanelanang mabapi le kopo tsa bona tse sephara. E 'ngoe ea theknoloji e tloaelehileng nkoa argon tjheseletsa ea aluminium. Ka tloaelo ho welded netermouprochnyaemye lits'epe tse kopantsoeng deformable aluminium ho eo botekgeniki aluminium (matshwao AD AD1) e thehiloeng lits'epe tse kopantsoeng aluminium le mankanese (AMts), aluminium le magnesium (AlMg). lits'epe tse kopantsoeng joalo ka go tlhaolega e kenyeletsa thata-ho. Hobane di a sebelisa, haeba mocheso kalafo ke ha khoneha hore mohaho.

Ea alumina eaba ba etsa refractory filimi ka holim 'a workpiece (TM Al ₂ O ₃ = 2050 ° C), le segokanyipalo sa e moholo ho tšepe ka boeona. Le timetso ea oxide e filimi ea likaroloana tsa lona silafatsa welded bate, thatafatsa ea metshetshe mabapi. Ka hona argon tjheseletsa ya aluminium ke rateha ka mor'a ho tlosa phetha molao oxide e kapa mananose botlaaseng le tšepe filler. rarahana eketsehileng le ho etsa hore phapang e bohlokoa pakeng tsa Al qhibiliha (TM = 660 ba ° C) le oxide e lona.

Ha e argon ho tjheseletsa le batho bao e seng consumable tungsten eleketrode ya aluminium, e fapanyetsana jwale e sebelisoa. Tabeng ena, ho oxide e filimi e timetsoa ka khutlisetsang polarity halofo lipotolohong ha e eleketrode ke 70% mocheso moloko oa selikalikoe, 'me sehlahisoa - 30% (sputtering le hlaha).

matla tsa tšepe le decreases sharply ka thempereichara e phahameng, e leng ho ka etsa hore ho timetsoa ha unmelted karolo bohale tlas'a boima ba cheseletsa letamo. Eketseha qhibiliha phalla Al eketsa monyetla oa ho dutla ho tloha ba le motso oa ao cheseletse ena. E le hore ho thibela matšoao a li chesa 'me ho hlōleha cheseletsa, haeba o ile a etsa argon thekenoloji tjheseletsa' na sa akarelletsa ho sebelisa eaba ba etsa le ceramic (graphite le tšepe) mekatelo. Cosi, tjheseletsa kapa ba se nang balekane-lera le dikarolo ea pele tšepe le selotlolo seam.

E tšekamelo e nyolohetse ho warping tsa lits'epe tse kopantsoeng aluminium ka hlōloa ka ho phetha tjheseletsa ka maemo homolog mocheso le futhumala likotoana mosebetsi. The ketsahalo hydrogen ao cheseletse porosity, haholo-holo a sa bonahaleng ka lits'epe tse kopantsoeng le magnesium, ke mokhoa oa ho futhumatsa e fokotsehile ho T = 150-250 ° C pele le nakong ea ho tjheseletsa, 'me ke hloekisa ka ho phethahetseng ea metshetshe le welded terata. Hore ba se ke ba hlaha mapetsong a chesang, seams ha baa lokela ho teng haufi le e mong le e tse ling. Hape, hoa khoneha tlaleletsa ka modifiers khethehileng ka ho matlafatsa tšepe.

Argon aluminium tjheseletsa akarelletsa tšebeliso ea sireletsang tikoloho ya gaseous tsa inert argon khase displacing sepakapakeng moea ho tswa ho cheseletsa hlapa le lero la mali selikalikoe. Ho hlokehang ka 'na AR (sehlopha sa phahameng ka ho fetisisa kapa ea pele). mothofatso mong ea tšireletso - tse kang helium, motsoako oa tse kang helium le argon, empa joale e ntan'o ba sireletsang khase phallo e batla e eketsehile.

Bophara nonconsumable tungsten eleketrode (ntle le tse hloekileng, kapa o ile a sebelisa lanthanised ittrirovannye) e kgethile ho itšetlehile ka sehlahisoa botenya. E le lintho tse bonahalang filler sebetsang sebakeng sa hae tjheseletsa terata ya limaraka tse fapa-fapaneng, ho itšetlehile ka ho hlophisoa ha ba ka sehloohong sehlahiswa le bohale botenya. Boleng bo phahameng ho tjheseletsa matsoho a ka argon ka ho phethwa ka e fapanyetsana jwale (UDG mofuta ea tlhomamiso) ka mekhoa ho hlokahala, tse kgethile e welder nang le phihlelo. simololang le lokela ho pele ho tloaela mehloli ea lingoliloeng, ho ba le mekhoa le makolopetso ea ho tjheseletsa aluminium.