Nɛgɛ min tɛ sɔgɔ, o bɛ se ka tila kulu naani ye ka kɛɲɛ n’a ka nɛgɛ ye, n’o ye nɛgɛ ye min bɛ kɛ ni nɛgɛ ye, nɛgɛ min bɛ kɛ ni nɛgɛ ye, nɛgɛ min bɛ kɛ ni nɛgɛ ye, nɛgɛ min tɛ kɛ ni nɛgɛ ye, ani nɛgɛ min bɛ kɛ ni nɛgɛ ye min bɛ kɛ ni nɛgɛ ye. Ninnu bɛ austenitic inox ani nɛgɛ min bɛ kɛ ni nɛgɛ ye min bɛ kɛ ni nɛgɛ ye, o ka welding cogoyaw bɛ sɛgɛsɛgɛ kosɛbɛ.
(1) Austenitic inox welding .
Austenitic inox welda ka nɔgɔn ka tɛmɛ nɛgɛ tɔw kan. Fasa caman tɛ Kɛ funteni si la, wa a tɛ Sɔ̀rɔ idɔrɔzi 'kɔnɔ. Austenitic inox joints fana bɛ ni plasitiki ni gɛlɛya ɲuman ye welda cogoya la. welding gɛlɛyabaw ye: welding hot cracking, embrittlement, intergranular corrosion ani stress corrosion. Ka fara o kan, k’a sababu kɛ funteni-taama-cogo jugu ye, coefficient lineaire belebele, welding stress belebele ani deformation. Ni welding, welding heat input ka kan ka dɔgɔya cogo min na, wa a man kan ka sumaya ka kɔn, ani ka a kɛ ko a ni a cɛla, a ka kan ka jigin. A ni ɲɔgɔn cɛ funteni ka kan ka kɔlɔsi 60°C duguma, ani welda joliw ka kan ka wuli. Walasa ka funteni donta dɔgɔya, welding teliya man kan ka caya kojugu, nka a ka kan ka ladamu walasa ka welding current dɔgɔya.
(2) Austenitic-Ferritic Two-Phase inox welding .
Austenitic-Ferritic bidirectional inox ye duplex inox ye min dilannen don ni ɔsitɛni ni feriti ye. A bɛ nafa minnu bɛ sɔrɔ nɛgɛ ni nɛgɛ nɛgɛma nafa la, o la, a fanga ka bon, a bɛ se ka sɔgɔ ka ɲɛ ani a sɔgɔli ka nɔgɔn. Sisan, duplex inox suguya saba de bɛ yen kɛrɛnkɛrɛnnenya la: CR18, CR21, ani CR25. Nin nɛgɛ suguya in jogo jɔnjɔnw ye : ni a bɛ tali kɛ nɛgɛ autenitiki la, a ka funteni ka dɔgɔn; Ni an y’a suma ni nɛgɛ saniyalen ye min bɛ kɛ ni nɛgɛ ye, a ka teli ka kɛ fɛn ye min bɛ se ka kɛ fɛn ye min bɛ kɛ ka fɛnw sɔgɔ a welding kɔfɛ, wa ferite coarsening hakɛ min bɛ sɔrɔ welding ka funteni-banakisɛ-yɔrɔ la o fana ka dɔgɔ, o la, weldability ka fisa.
K’a sababu kɛ nin nɛgɛ suguya in ka welding kɛcogo ɲuman ye, a ka sumaya ni a ka sumaya kɔfɛ, o man kan ka kɛ welding waati la. Falan finmanw ka kan ka welda ni TIG ye, ani tasa cɛmancɛw ni fasaw bɛ se ka welda ni elekitorode arc welding ye. Elektɔri kɛrɛnkɛrɛnnen min ni nɛgɛ basigilen walima austenitic elekitorode bɛ ɲɔgɔn na ni karɔbɔli hakɛ dɔgɔman ye, olu ka kan ka sugandi elekitorode arc welding kama. Nikɛri-based alloy electrodes fana bɛ se ka kɛ CR25 dual-phase steel ye.
K’a sababu kɛ feriti hakɛ caman bɛ nɛgɛ fila-fila la, nɛgɛw ka bɔnɔgɔlabɔli nege min bɛ sɔrɔ a la, i n’a fɔ 475°C, σ fasa sanjiko ni sumanmugu gɛlɛnw, olu bɛ yen hali bi k’a sababu kɛ austenite ka balansi nɔ bɛ se ka lafiya fo ka se hakɛ dɔ ma, o la aw mago bɛ a la hali bi ko weld. Ni duplex inox welding ni Ni walima ni dɔgɔman tɛ, a ka teli ka kɛ ni feriti kelen ye ani ka sumanw gɛlɛya funteni-yɔrɔ la. Nin waati in na, jateminɛ ka kan ka kɛ walasa ka welding heat input (sɔgɔli funteni donta) kunbɛn, ani k’a ɲini ka baara kɛ ni current (kurunba) teliya dɔgɔman ye, welding (sɔgɔli teliya) teliya, ani pass welding (sɔgɔsɔgɔninjɛ). ani ka welding multi-pass kɛ walasa ka sumanw gɛlɛyali ni phase kelen-kelen bali funteni-yɔrɔ la, layɛrɛw ni ɲɔgɔn cɛ funteni man kan ka caya kojugu, wa a ka fisa ka tɛmɛsira nata welda nɛnɛ kɔfɛ.
Nin fila bɛɛ ye suguyaw ye minnu bɛ welda ka nɔgɔn. Nka, nɛgɛ suguya dɔw fana bɛ yen minnu tɛ sɔgɔ, ni u sɔgɔli man ɲi, i n’a fɔ ferite. Nin waati in na, an b’a ɲini aw fɛ aw ka jateminɛ kɛ an ka welding dɛmɛnan baarakɛminɛnw na-Electromagnetic Control Arc Stabilisation Device .. Hangao Tech (Seko Machinery) ye ko kɛlenw ni kunnafoniw lajɛ weldalen pipe dilanni minɛnw dilanni na san 20 tɛmɛnenw kɔnɔ, walasa hali ni welding teliya ɲɛnabɔra, a bɛ se ka jateminɛ kɛ fana welda cogoya la. welda ka ɲumanya bɛ garanti, wa ni welda pipe donna baara nata la walasa ka baara kɛ, a bɛ se ka kɛ ko fɛn tiɲɛnenw hakɛ bɛ se ka dɔgɔya kosɛbɛ ani ka bɔli kɛ ka caya.
