Nata, Hangao TEHC (Seko masinw) bɛna to ka taa ni i ye walasa ka gɛlɛyaw faamuya minnu bɛ se ka kɛ welding kɛtuma na ani ka i dɛmɛ ka o gɛlɛya suguw kunbɛn ani k’u ɲɛnabɔ.
03 welding hot cracks (crystallization cracks in welds, liquefaction cracks in the heat-affected zone)
Sumaya karili ka teli ka kɛ kɛrɛnkɛrɛnnenya la, o bɛ bɔ fɛnw dilanni na, u labɛncogo la ani u kɛcogo la. Ni ka nɔgɔn ka low melting point compounds walima etectic sɔrɔ ni nɔgɔw ye i n’a fɔ S ani P. Boron ni silicon danfara bɛna funteni karili sabati.
welda sɔgɔli ka nɔgɔn ka kɛ kristalɛ koloma jɔcogo gɛlɛn ye ni sirako barikama ye, min bɛ nafa don nɔgɔ juguw ni fɛnw danfara la. O bɛ kɛ sababu ye ka filimu jilama dɔ sigi sen kan min bɛ to senna ani ka funteni karili sɛgɛsɛgɛli ɲɛ. Ni welding ma sumaya cogo kelen na, a ka nɔgɔn ka degunba dɔ dilan ani ka welding hot cracks (sɔgɔli funteni) bɔli sabati.
Banakunbɛn fɛɛrɛw:
kelen. Aw bɛ nɔgɔ juguw kɔnɔkow kɔlɔsi kosɛbɛ s ani p.
B. Aw bɛ welda nɛgɛ labɛncogo ladilan. Dual-phase structure weld bɛ ni crack resistance ɲuman ye. Delta fasa min bɛ welda la, o bɛ se ka sumanw nɔgɔya, ka austenite fasa kelen siratigɛ bɔ, ka nɔgɔ juguw danfara dɔgɔya suman dancɛ la, ani delta fasa bɛ se ka S ni P bɛ se ka fanga dɔgɔya ka tɛmɛ fanga kan ani ka ji jilamaw ni ɲɔgɔn cɛ filimuw labɛnni labɛn.
C. Aw bɛ weld metal alloy composition ladilan. Aw bɛ dɔ fara MN, C ani N hakɛ kan cogo bɛnnen na, autenitiki nɛgɛ kelen na, ka sɔrɔ ka fɛnɲɛnamafagalanw hakɛ fitinin dɔ fara a kan i n’a fɔ cerium, pickaxe, ani tantalum (o bɛ se ka welda jɔcogo nɔgɔya ani ka suman dancɛ saniya), o bɛ se ka dɔ bɔ funteni karili hakɛ la.
D. Taabolo fɛɛrɛw. Aw bɛ jibolisira wulilen sumaya kojugu walasa ka kristalɛ kolomamugumuguw bali. Aw bɛ baara kɛ ni funteni donnafɛn misɛnninw ye ani ka jiribolo welda misɛnninw kɛ. Kelen Arc sabatili minɛn bɛ se ka fara a kan welding kɛtuma na walasa ka dɔ bɔ a ka jidagayɔrɔ la, ka welding marifa baarakɛcogo ɲɛ, ani ka welding cogoya ɲɛ.
Misali la, 25-20 austenitic steel ka teli ka kɛ ji la. A bɛ se ka dan sigi kosɛbɛ nɔgɔ hakɛ ni a suman hakɛ la, ka fanga caman sɔrɔ density welding fɛɛrɛw la, ka funteni don dɔɔnin ani ka jogindaw nɛnɛ hakɛ caya.
04 Jogindaw weldalen don .
Funteni fanga ka kan ka a lajɛ ko jolidaw ka plasitiki ka kan ka kɛ walasa ka funteni caman bɔli bali; Nɛgɛ minnu funteni ka dɔgɔn, olu ka kan ka kɛ walasa funteni dɔgɔyalen ka gɛlɛya walasa ka jolidaw ka kari ka bɔ funteni dɔgɔman na.
05 welding distortion belebele .
K’a sababu kɛ funteni-taama-cogo dɔgɔyali ye ani bonya coefficient belebele ye, welding deformation ka bon, ani clamps bɛ se ka kɛ ka deformation bali. Austenitic inox welding fɛɛrɛ ani welding fɛnw sugandili:
Austenitic inoless steel bɛ se ka welda ni argon tungsten arc welding (TIG), molten argon arc welding (MIG), plasma argon arc welding (PAW) ani arc arc welding (SAW) ye.
Autenitic inox steel bɛ ni welding current dɔgɔman ye k’a sababu kɛ a wulicogo ka dɔgɔn, a ka funteni jiginni ka dɔgɔn, ani a ka kuran resistivity (ji) ka bon. welda ni biɲɛ misɛnninw ka kan ka kɛ ka sigiyɔrɔ waati dɔgɔya, ka karɔti sanji bali, ka welda dɔgɔyali degunw dɔgɔya, ani ka funteni hakɛ dɔgɔyali dɔgɔya.
welding material (sɔgɔlifɛnw) dabɔcogo, kɛrɛnkɛrɛnnenya la Cr ni Ni alloying elements (Kr ni NI alloying elements) ka bon ka tɛmɛ basi-fɛn ta kan. Aw bɛ welding materials kɛ ni ferite hakɛ fitinin (4-12%) ye walasa ka crack resistance ɲuman (nɛnɛ kari, kari funteni, stress corrosion cracking) baarakɛcogo ɲuman sɔrɔ.
Ni feriti fasa ma sɔn walima ni a tɛ se ka kɛ welda la, welding material ka kan ka kɛ welding material ye MO, MN ani alloy elements wɛrɛw bɛ minnu na.
C, S, P, Si, ani NB min bɛ sosɛti kɔnɔ, olu ka kan ka dɔgɔya cogo min na. NB bɛna kɛ sababu ye ka solidification cracks in the pure austenitic weld, nka ferite hakɛ fitinin dɔ bɛ se ka kɔlɔsi kosɛbɛ.
Walasa ka welding structures minnu ka kan ka sabati walima ka degun sɔrɔ welding kɔfɛ, NB bɛ sɔrɔ welding materials (NB bɛ minnu na) bɛ kɛ ka caya. Submerged arc welding bɛ kɛ ka cɛmancɛ plate welda, ani CR ni Ni jeninida bɔnɛ bɛ se ka fara a kan ni flux ni alloy elements jiginni ye welding wire kɔnɔ
K’a sababu kɛ doncogo juguya ye, aw ka kan ka aw janto a la walasa ka faraw bali minnu bɛ sɔrɔ welda cɛmancɛ la ani ka nɔgɔw kunbɛncogo dɔgɔya funteni bɛ yɔrɔ min na. Jateminɛ ka kan ka kɛ ka ɲɛsin welding wire finman sugandili ma ani welding heat input fitinin. Welding wire ka kan ka dɔgɔya Si, S, ani p.
Feriti hakɛ min bɛ sɔrɔ welda la min bɛ se ka funteni sɔrɔ, o man kan ka tɛmɛ 5% kan. Ni autenitic inox ni CR ni Ni hakɛ ka ca ni 20% ye, Mn (6-8%) welding wire ka kan ka kɛ, ani alkaline walima neutre flux ka kan ka kɛ flux ye walasa ka Si farali bali welda la ani k’a ka kari kunbɛncogo ɲɛ.
Flux kɛrɛnkɛrɛnnen min bɛ kɛ ka austenitic stainless steel sɔrɔ, o bɛ dɔ caya kosɛbɛ SI la, o bɛ se ka o nɛgɛ in bila welda la ani ka fɛn dɔw bɔnɛni bɔnɛw musaka bɔ walasa ka welda baarakɛcogo ni kemikɛli kɛcogo wajibiyalenw dafa.
