Litaba

Ho ba teng ha lesela la zinki ho tlisitse mathata a itseng ho cheselletsang tšepe ea masenke.Mathata a ka sehloohong ke: kutloisiso e ntseng e eketseha ea mapetsong a tjheseletsa le li-pores, mouoane oa zinki le mosi, ho kenyeletsoa ha oxide slag, le ho qhibiliha le tšenyo ea ho roala zinki.Har'a bona, mathata a ka sehloohong ke ho phatloha ha welding, lesoba la moea le ho kenyelletsoa ha slag.
Weldability
(1) Lepetso
Nakong ea ho cheselletsa, zinki e qhibilihisitsoeng e phaphamala ka holim'a letamo le entsoeng ka ho qhibilihisoa kapa motsong oa cheseletso.Hobane ntlha e qhibilihang ea zinki e tlase haholo ho feta ea tšepe, tšepe e ka letamong le qhibilihisitsoeng e qala ho phatsima, 'me zinki ea maqhubu e tla kena ka har'a eona haufi le moeli oa lijo-thollo tsa tšepe, e leng se lebisang ho fokotseng maqhama a intergranular.Ho feta moo, ho bonolo ho theha metsoako ea intermetallic brittle Fe3Zn10 le FeZn10 pakeng tsa zinki le tšepe, e leng ho fokotsang polasetiki ea tšepe ea weld, kahoo ho bonolo ho phunyeletsa moeling oa lijo-thollo le ho theha mapetsong tlas'a phello ea ho cheselletsa khatello e setseng.
Lintlha tse amang ho hlaka ha crack: ① Botenya ba lesela la zinki: lesela la zinki la masenke le tšesaane, 'me "crack sensitivity" e nyane, athe zinc layer ea tšepe e chesang ea dip galvanized e tenya, 'me sekhahla sa crack se seholo.② Botenya ba sesebediswa sa mosebetsi: ha botenya bo hola, kgatello ya ho thibela tjheseletsa e ba matla le ho feta ho utlwa bohloko ha crack.③ Lekhalo la Groove: lekhalo
E kholoanyane, e kholoanyane ea kutlo ea crack.④ Mokhoa oa ho tjheseletsa: kutlo ea crack e nyane ha ho sebelisoa arc welding, empa e kholo ha ho sebelisoa welding e sirelelitsoeng ka khase ea CO2.
Mekhoa ea ho thibela mapetsong: ① Pele u tjheseletsa, bula groove e bōpehileng joaloka V, e bōpehileng joaloka Y kapa X sebakeng sa ho cheselletsa lakane e entsoeng ka masenke, tlosa lesela la zinki haufi le groove ka ho phatloha ha oxyacetylene kapa lehlabathe, 'me u laole lekhalo hore le se ke la ba teng. e be kholo haholo, ka kakaretso e ka ba 1.5mm.② Khetha lisebelisoa tsa welding tse nang le litaba tse tlase tsa Si.terata ea ho cheselletsa e nang le dikahare tse tlase tsa Si e tla sebelisoa bakeng sa tjheseletsa e sirelelitsoeng ka khase, 'me mofuta oa titanium le molamu oa mofuta oa titanium-calcium o tla sebelisoa bakeng sa ho cheselletsa ka letsoho.
(2) Stomata
Lesela la zinki le haufi le groove le tla oxidize (foromo ea ZnO) ebe e fetoha mouoane tlas'a ketso ea mocheso oa arc, 'me e ntša mosi o mosoeu le mouoane, kahoo ho bonolo haholo ho baka li-pores ka weld.Ha motlakase oa tjheseletsa o ntse o le moholo, ke moo mouoane oa zinki o leng matla le ho feta 'me ho ba le kutlo e kholo ea porosity.Ha ho bonolo ho hlahisa li-pores ka har'a mefuta e bohareng ea hajoale ha u sebelisa mofuta oa titanium le mefuta e khanyang ea mofuta oa titanium-calcium bakeng sa ho cheselletsa.Leha ho le joalo, ha mofuta oa selulose le li-electrode tse tlase tsa mofuta oa hydrogen li sebelisoa bakeng sa ho cheselletsa, li-pores li bonolo ho hlaha tlas'a maemo a tlase le a phahameng a hona joale.Ho phaella moo, angle electrode e lokela ho laoloa ka hare ho 30 ° ~ 70 ° ka hohle kamoo ho ka khonehang.
(3) Ho fetoha mouoane oa zinki le mosi
Ha poleiti ea tšepe e entsoeng ka galvanized e kenngoe ka motlakase oa arc welding, lesela la zinki le haufi le letamo le qhibilihisitsoeng le na le oxidized ho ZnO 'me le fetoha mouoane tlas'a ketso ea mocheso oa arc, ho etsa mosi o mongata.Karolo e ka sehloohong ea mosi oa mofuta ona ke ZnO, e nang le phello e kholo e susumetsang litho tsa basebetsi ba phefumolohang.Ka hona, mehato e metle ea moea e tlameha ho nkuoa nakong ea welding.Tlas'a tlhaloso e tšoanang ea tjheseletsa, palo ea mosi o hlahisoang ke ho tjheseletsa ka electrode ea mofuta oa titanium oxide e tlaase, ha palo ea mosi e hlahisoang ke ho tjheseletsa ka electrode ea mofuta oa hydrogen e tlaase e le khōlō.(4) Kenyelletso ea oksijene
Ha ts'ebetso ea welding e le nyane, ZnO e thehiloeng ts'ebetsong ea ho futhumatsa ha e bonolo ho baleha, e leng bonolo ho etsa hore ho kenyelelitsoe ZnO slag.ZnO e batla e tsitsitse mme ntlha ea eona e qhibilihang ke 1800 ℃.Li-inclusions tse kholo tsa ZnO li na le phello e mpe haholo ho polasetiki ea weld.Ha ho sebelisoa electrode ea titanium oxide, ZnO e ntle ebile e ajoa ka ho lekana, e nang le phello e fokolang holim'a polasetiki le matla a thata.Ha mofuta oa selulose kapa mofuta oa hydrogen elektrode e sebelisoa, ZnO ho weld e kholoanyane le ho feta, mme ts'ebetso ea weld e fokola.