1.1 Fatigue Strength ntawm chav kub
Inconel 600 muaj zog qaug zog zoo heev nyob rau hauv chav tsev kub vim nws cov ntsiab lus npib tsib xee siab, uas muab cov ductility zoo thiab toughness.
Lub alloy tuaj yeem tiv taus siab -mob qaug zog (HCF) loading nyob rau hauv nruab nrab kev ntxhov siab amplitudes.
Smooth, polished specimens feem ntau qhia txog kev qaug zog (kev txwv tsis pub dhau) nyob rau hauv thaj tsam ntawm 200-250 MPa rau kev thim rov qab tag nrho (R=-1).
Deg tsis xws luag, machining marks, los yog corrosion yuav txo tau qhov qaug zog txwv.
1.2 Kev qaug zog ntawm qhov kub siab
Raws li qhov kub thiab txias, lub zog qaug zog ntawm Inconel 600 maj mam txo.
Ntawm 400-600 degree, lub zog qaug zog yog li 60-70% ntawm chav tsev-tus nqi kub.
Ntawm 700℃thiab siab dua, lub zog qaug zog poob qis dua vim:
Nce creep deformation.
Cov qoob loo ciam teb tsis muaj zog.
Oxidation thiab ib puag ncig tawm tsam.
Nyob rau hauv siab - kub qaug zog (thermal qaug zog), Inconel 600 yuav muaj kev cyclic oxidation, tawg pib ntawm oxide nplai, thiab grain ciam teb tawg, ntxiv txo qaug zog lub neej.
1.3 Tsawg-Cycle Fatigue (LCF) Performance
Inconel 600 muaj qhov zoo qis - voj voog qaug zog vim nws cov ductility siab thiab tsis tshua muaj siab rau embrittlement.
Nws tuaj yeem tiv taus cov yas tseem ceeb thaum lub sij hawm thauj khoom, ua rau nws haum rau cov khoom raws li:
Thermal cycling.
Pib- thiab kaw lub voj voog.
Mechanical cycling nrog loj strain amplitudes.
Ntawm qhov kub siab, LCF lub neej poob qis vim muaj kev nkag siab - qaug zog, uas ua rau:
Cavitation ntawm grain ciam teb.
Kev sib sau ntawm cov yas yas.
Intergranular tawg kev loj hlob.
1.4 Qhov cuam tshuam ntawm vuam ntawm kev ua haujlwm qaug zog
Welded pob qij txha ntawm Inconel 600 feem ntau muaj zog qaug zog qis dua li cov hlau puag.
Cov laj thawj uas ua rau txo qis kev qaug zog muaj xws li:
Residual stresses los ntawm vuam.
Weld tsis xws luag (porosity, inclusions, undercut).
Kev ntxhov siab concentration ntawm cov ntiv taw thiab cov hauv paus hniav.
Thaum tshav kub kub- thaj tsam cuam tshuam (HAZ) softening lossis grain loj hlob.
Tom qab-weld heat treatment (PWHT) tuaj yeem txhim kho kev ua haujlwm qaug zog los ntawm kev txo qis kev ntxhov siab, tab sis tej zaum yuav txo qis me ntsis siab - qhov kub thiab txias yog tias tsis tswj tau zoo.
1.5 Qhov cuam tshuam ntawm Corrosion rau Fatigue (Corrosion Fatigue)
Inconel 600 muaj kev cuam tshuam rau corrosion qaug zog hauv qee qhov chaw, tshwj xeeb tshaj yog:
Chloride{0}} muaj cov tshuaj.
Acid ib puag ncig.
Siab - dej kub los yog chav dej.
Corrosion qaug zog txo lub zog qaug zog thiab tuaj yeem ua rau qhov pib tawg ntxov ntxov.
Nyob rau hauv sib piv, Inconel 600 qhia tau hais tias zoo corrosion qaug zog kuj nyob rau hauv alkaline ib puag ncig thiab ntau oxidizing xov xwm vim nws ruaj khov oxide txheej.
1.6 Fatigue Crack Loj hlob tus nqi
Inconel 600 muaj qhov tsis tshua muaj zog tawg qhov kev loj hlob ntawm chav tsev kub, uas muaj txiaj ntsig zoo rau cov khoom siv uas cov kab nrib pleb yuav pib tab sis yuav tsum tau ntim.
Ntawm qhov kub siab, qhov tawg qhov kev loj hlob nce vim yog:
Environmental teebmeem (oxidation, creep).
Nplej ciam swb.
Lub alloy txoj kev loj hlob tus cwj pwm tseem cuam tshuam los ntawm kev muaj kev ntxhov siab corrosion cracking (SCC) hauv qee qhov chaw.
1.7 Daim Ntawv Thov Qhov Kev Ua Tau Zoo Tshaj Plaws yog qhov tseem ceeb
Inconel 600 yog siv rau hauv ntau daim ntawv thov uas xav tau kev qaug zog zoo, suav nrog:
Nuclear reactor Cheebtsam (tswj qws tsav mechanisms, chav generator raj).
Thaum tshav kub kub exchanger raj nyob rau hauv petrochemical nroj tsuag.
Cov Cheebtsam ntawm lub cub tawg yuav raug thermal cycling.
Turbine cua tshuab thiab siab -kub ducts.
Aerospace Cheebtsam (txawm hais tias ntau tshaj superalloys feem ntau nyiam rau qhov xav tau kev qaug zog heev).
1.8 Cov ntsiab lus
Inconel 600 muaj qhov ua tau zoo qaug zog ntawm chav tsev kub thiab nruab nrab kub.
Lub zog qaug zog txo qis ntawm 700℃thiab siab dua vim muaj kev nkag mus, oxidation, thiab nplej ciam teb.
Vuam, corrosion, thiab thermal cycling tuaj yeem txo lub neej qaug zog.
Cov hlau yog tsim rau siab - voj voog thiab qis - daim ntawv thov kev qaug zog, tab sis ua tib zoo xav txog qhov kub, ib puag ncig, thiab qib kev ntxhov siab yog tsim nyog.
