1. Filimi ea oksijene:
Aluminium e bonolo haholo ho oxidize moeeng le nakong ea welding. Sephetho sa aluminium oxide (Al2O3) se na le ntlha e phahameng ea ho qhibiliha, e tsitsitse haholo, 'me ho thata ho e tlosa. E sitisa ho qhibiliha le ho kopanngoa ha lintho tsa motsoali. Filimi ea oxide e na le matla a khoheli a phahameng 'me ha ho bonolo ho phaphamala holimo. Ho bonolo ho hlahisa mefokolo e kang ho kenngoa ha slag, fusion e sa fellang, le ho kenella ho sa fellang.
Filimi ea oxide e holim'a aluminium le ho kenngoa ha mongobo o mongata ho ka baka habonolo li-pores ka weld. Pele ho tjheseletsa, mekhoa ea lik'hemik'hale kapa ea mechine e lokela ho sebelisoa ho hloekisa ka holimo le ho tlosa filimi ea oxide e holim'a metsi.
Matlafatsa tšireletso nakong ea ts'ebetso ea welding ho thibela oxidation. Ha u sebelisa tungsten inert gas welding, sebelisa matla a AC ho tlosa filimi ea oxide ka phello ea "cathode cleaner".
Ha u sebelisa welding ea khase, sebelisa phallo e tlosang filimi ea oxide. Ha ho tjheseletsa lipoleiti tse teteaneng, mocheso oa tjheseletsa o ka eketseha. Ka mohlala, helium arc e na le mocheso o moholo, 'me khase e tsoakiloeng ea helium kapa argon-helium e sebelisoa bakeng sa tšireletso, kapa ho sebelisoa tjheseletsa e sirelelitsoeng ka khase ea electrode e ngata e qhibilihisang. Tabeng ea khokahanyo e nepahetseng ea hona joale, "ho hloekisa cathode" ha ho hlokahale.
2. High mogote conductivity
Thermal conductivity le matla a khethehileng a mocheso oa aluminium le li-alloys tsa aluminium li ka ba habeli ho feta tsa carbon steel le low-alloy steel. Thermal conductivity ea aluminium ke makhetlo a fetang leshome a austenitic stainless steel.
Nakong ea ts'ebetso ea welding, mocheso o mongata o ka etsoa kapele ka tšepe ea motheo. Ka hona, ha ho cheselletsa aluminium le li-alloys tsa aluminium, ho phaella ho matla a sebelisoang ka letamo la tšepe le qhibilihisitsoeng, mocheso o eketsehileng o boetse o sebelisoa ho sa hlokahale likarolong tse ling tsa tšepe. Sena Tšebeliso ea mofuta ona oa matla a se nang thuso ke ea bohlokoa ho feta ea ho cheselletsa tšepe. E le ho fumana manonyeletso a boleng bo phahameng, matla a nang le matla a mangata le matla a phahameng a lokela ho sebelisoa ka hohle kamoo ho ka khonehang, 'me ka linako tse ling preheating le mehato e meng ea ts'ebetso e ka boela ea sebelisoa.
3. E kholo linear katoloso coefficient, bonolo ho deform le ho hlahisa mapetsong mocheso
Mohala oa katoloso ea coefficient ea aluminium le alloys ea aluminium e batla e lekana habeli ea tšepe ea carbon le tšepe e tlase ea alloy. The shrinkage ea molumo oa aluminium nakong ea solidification e kholo, 'me deformation le khatello ea kelello ea weldment e kholo. Ka hona, mehato e lokela ho nkoa ho thibela ho senyeha ha li-welding.
Ha letamo le qhibilihang la aluminium le qhibiliha le tiea, ho bonolo ho hlahisa likheo tse nyenyefatsang, shrinkage porosity, mapetsong a chesang le khatello e phahameng ea ka hare.
Thepa ea welding ea Xinfa e na le litšobotsi tsa boleng bo holimo le theko e tlase. Ho fumana lintlha, ka kopo etela:Baetsi ba Welding & Cutting Manufacturers - China Welding & Cutting Factory & Suppliers (xinfatools.com)
Mehato e ka nkuoa ho lokisa sebopeho sa terata ea welding le ts'ebetso ea welding ho thibela ho hlaha ha mapetsong a chesang nakong ea tlhahiso. Haeba ho hanyetsa kutu ho lumella, terata ea aluminium-silicon alloy welding e ka sebelisoa ho cheselletsa lialloi tsa aluminium ntle le lialloi tsa aluminium-magnesium. Ha motsoako oa aluminium-silicon o na le silicon ea 0.5%, tšekamelo ea ho phatloha ho chesang e kholoanyane. Ha litaba tsa silicon li ntse li eketseha, mocheso oa mocheso oa crystallization oa alloy o fetoha o monyenyane, mokelikeli o eketseha haholo, sekhahla sa shrinkage se fokotseha, 'me tšekamelo ea ho phatloha ho chesang e boetse e fokotseha ka tsela e nepahetseng.
Ho latela boiphihlelo ba tlhahiso, ho phatloha ho chesang ho ke ke ha etsahala ha litaba tsa silicon li le 5% ho isa ho 6%, ka hona ho sebelisa mohala oa SalSi (litekanyetso tsa silicon 4.5% ho isa ho 6%) terata ea welding e tla ba le khanyetso e ntle ea crack.
4. Habonolo qhala haedrojene
Aluminium le aluminium alloys li ka qhala haedrojene e ngata sebakeng sa mokelikeli, empa ha e khone ho qhala haedrojene sebakeng se tiileng. Nakong ea ho tiisa le ho pholisa ka potlako ha letamo la ho cheselletsa, hydrogen ha e na nako ea ho baleha, 'me masoba a haedrojene a thehoa habonolo. Mongobo oa sepakapaka sa arc column, mongobo o kentsoeng ke filimi ea oxide e holim'a lisebelisoa tsa welding le tšepe ea motheo kaofela ke mehloli ea bohlokoa ea hydrogen ka har'a weld. Ka hona, mohloli oa hydrogen o tlameha ho laoloa ka thata ho thibela ho thehoa ha li-pores.
5. Likarolo le libaka tse amehileng ke mocheso li nolofatsoa habonolo
Lisebelisoa tsa alloy li bonolo ho fetoha mouoane le ho chesa, tse fokotsang ts'ebetso ea weld.
Haeba tšepe ea motheo e matlafalitsoe kapa e tiileng-tharollo e matlafalitsoe ka lilemo, mocheso oa tjheseletsa o tla fokotsa matla a sebaka se amehileng ke mocheso.
Aluminium e na le li-cubic lattice tse bohareng ba sefahleho 'me ha e na allotropes. Ha ho na phetoho ea mohato nakong ea ho futhumatsa le ho pholile. Lithollo tsa weld li atisa ho ba mahoashe 'me lithollo ha li khone ho hloekisoa ka liphetoho tsa mekhahlelo.
Mokhoa oa ho cheselletsa
Hoo e ka bang mekhoa e fapaneng ea ho tjheseletsa e ka sebelisoa ho tjheseletsa aluminium le lialloi tsa aluminium, empa lialloi tsa aluminium le aluminium li na le maemo a fapaneng a ho ikamahanya le mekhoa e fapaneng ea ho cheselletsa, 'me mekhoa e fapaneng ea ho cheselletsa e na le linako tsa eona tsa ts'ebeliso.
Mekhoa ea ho tjheseletsa khase le li-electrode arc li bonolo ho lisebelisoa ebile ho bonolo ho e sebetsa. Ho cheselletsa khase ho ka sebelisoa bakeng sa ho lokisa lishiti tsa aluminium le li-castings tse sa hlokeng boleng bo phahameng ba tjheseletsa. Electrode arc welding e ka sebelisoa bakeng sa ho lokisa welding ea aluminium alloy castings.
Mokhoa oa ho chesella o sirelelitsoeng ka khase e inert (TIG kapa MIG) ke mokhoa o sebelisoang haholo oa ho tjheseletsa oa aluminium le lialloi tsa aluminium.
Aluminium le aluminium alloy sheets li ka tjhesetsoa ka tungsten electrode alternating current argon arc welding kapa tungsten electrode pulse argon arc welding.
Aluminium le aluminium alloy lipoleiti tse teteaneng li ka sebetsoa ka tjheseletsa ea tungsten helium arc, argon-helium e tsoakiloeng ea tungsten arc welding, welding ea tšepe ea khase ea tšepe, le welding ea tšepe ea pulse arc. Welding ea tšepe ea tšepe ea khase le pulse gas metal arc welding e ntse e sebelisoa le ho feta.
Nako ea poso: Jul-25-2024
