High -Tsub Mechanical Properties of Incoloy 925

1. Qhov tseem ceeb siab -Tsub Mechanical Properties

Qhov siab -kub txhua yam khoom ntawm Incoloy 925 yog txhais los ntawm cov qauv xws liASTM B 805 Cov Lus Qhia Tshwj XeebthiabTIAB SA 5832, nrog cov txiaj ntsig sib txawv me ntsis raws li kev kho cua sov thiab cov khoom siv (bar, pas nrig, forging, thiab lwm yam). Hauv qab no yog cov khoom siv kho tshuab zoo thoob plaws ntau yam ntawm qhov kub siab:

Kub (degree)	Tensile zog (MPa)	Lub zog muaj zog (0.2% offset, MPa)	Elongation (%)	Txo thaj tsam (%)
Chav ntsuas kub (25)	1100–1250	790–930	15–25	30–45
200	1050–1200	750–890	14–23	28–42
300	1000–1150	720–860	13–22	27–40
400	950–1100	690–830	12–20	25–38
500	880–1020	650–780	11–18	23–35
600	750–880	580–690	10–16	20–32
650	680–790	520–620	9–14	18–28

Cov Lus Qhia Ntxiv

Impact Toughness: Thaum kub txog li 500 degree, Incoloy 925 khaws Charpy V-notch cuam tshuam toughness ntawmNtau dua lossis sib npaug li 40 J. Tshaj li 550 degree, toughness maj mam txo, tab sis tseem txaus rau feem ntau cov qauv siv.

Kev qaug zog: Lub siab - lub voj voog qaug zog ntawm 400℃yog kwv yees li350-400 MPa(10⁷ cycles), uas yog 35-40% ntawm nws chav -kub tensile zog-qhov tseem ceeb siab tshaj ntau yam uas tsis yog- nag lossis daus- hardened nickel alloys.

Creep thiab Stress -Rupture Resistance: Cov hlau no nthuav tawm qhov kev nkag siab zoo ntawm 550℃nyob rau hauv kev ntxhov siab ntawm 300 MPa, nrog kev nkag siab tsawg dua 0.2% tom qab 10,000 teev. Nws txoj kev ntxhov siab- tawg lub neej ntawm 600℃thiab 275 MPa tshaj 20,000 teev, ua rau nws tsim nyog rau lub sijhawm ntev -kev pabcuam hauv siab- kub, siab - kev ntxhov siab ib puag ncig.

2. Txoj kev muaj zog nrog qhov kub thiab txias

Incoloy 925 tsis muaj qhov poob qis hauv lub zog nrog qhov kub thiab txias hauv nws qhov kev pabcuam tsim (feem ntau tsawg dua lossis sib npaug li 600 degree). Lub zog degradation ua raws li kev maj mam, kev kwv yees tau zoo, uas yog los ntawm nws cov nag lossis daus ntxiv dag zog:

Kub tsawg dua los yog sib npaug li 500 degree: Lub zog tseem nyob ruaj khov. Cov ' thiab ' precipitates yog thermally ruaj khov nyob rau hauv no ntau yam, zoo pinning dislocations thiab tiv thaiv deformation. Nyob rau ntawm 500 degree, nws lub zog tawm los tseem yog~70–80% ntawm chav tsev-kub tus nqi, tsis muaj kev poob siab.

Kub kub 500-600 degree: Lub zog pib txo qis qis. Raws li qhov kub thiab txias nce, qhov kev txav ntawm kev txav mus los nce, thiab cov nag lossis daus pib coarsen me ntsis, txo lawv cov txiaj ntsig ntxiv. Txawm li cas los xij, ntawm 600 degree, lub zog tawm los tseem yog~ 60–70% ntawm chav- qhov kub thiab txias, uas yog siab dua li ntawm cov khoom - kev daws teeb meem - muaj zog alloys zoo li Incoloy 825.

Temperature >650 degree: Lub zog poob qis dua tshwm sim. Tshaj li 650 degree, cov 'precipitates dissolve rau hauv matrix, thiab cov 'precipitates coarsen sai. Qhov no ua rau muaj kev poob loj ntawm lub zog - ntawm 700 degree, lub zog tawm los yuav poob mus rau<40% of the room-temperature value, uas yog tshaj qhov pom zoo qhov kev pabcuam kub ntawm Incoloy 925.

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3. Cov yam tseem ceeb cuam tshuam rau siab -Kev ua haujlwm kub

Kev kho cua sov zoo: Tshaj- kev laus (hnyav kub dhau los lossis lub sijhawm ntev) ua rau muaj nag lossis daus coarsening, uas txo ob chav - kub thiab siab - qhov kub thiab txias. Qhov kev kho cua sov zoo tshaj plaws yogKev daws annealing ntawm 980-1010℃rau 1-2 teev, ua raws li kev laus ntawm 718℃rau 8 teev, txias rau 621℃ntawm tus nqi ntawm 55℃/ teev, thiab tuav rau 8 teev ntxiv..

Microstructure Uniformity: Segregation ntawm alloying ntsiab (piv txwv li, Ti, Al, Nb) thaum lub sij hawm casting los yog forging tuaj yeem ua rau tsis sib xws los ntawm precipitate tis, ua rau lub zog poob ntawm qhov kub thiab txias.

Kev cuam tshuam ib puag ncig: Nyob rau hauv oxidizing los yog corrosive siab - qhov kub thiab txias ib puag ncig, tsim kom muaj ib tug ntom, adherent Cr₂O₃ oxide zaj duab xis tiv thaiv cov hlau los ntawm degradation degradation, uas indirectly khaws nws cov cuab yeej cuab tam los ntawm kev tiv thaiv ntxov ntxov tawg pib.

4. Tej yam siab heev -Tsub siv

Lub zog maj mam degradation thiab zoo heev creep kuj ua rau Incoloy 925 zoo tagnrho rau kev siv xws li:

Cov roj thiab cov roj hauv qhov chaw (tubing hangers, valve trim) ua haujlwm ntawm 300-550 degree

Aerospace engine fasteners thiab cov khoom siv

Chav turbine hniav thiab boiler Cheebtsam nyob rau hauv fais fab nroj tsuag

Cov cuab yeej siv tshuaj tua kab mob siab -kub, cov kua dej corrosive

Cov ntsiab lus

Incoloy 925 yog ib qho kev ua haujlwm siab - alloy nrog tshwj xeeb txhua yam kev ruaj ntseg ntawm qhov kub siab txog li 600℃. Nws lub zog txo qis nrog qhov kub thiab txias ntau dua li qhov ua tau zoo, ua tsaug rau cov nag lossis daus ruaj khov. Tshaj li 650 degree, txawm li cas los xij, lub zog poob qis heev vim yog nag lossis daus tawg thiab coarsening. Yog li ntawd, nws yog ib qho tseem ceeb kom txwv tsis pub nws qhov kub thiab txias nyob rau hauv qhov tsim los ua kom pom kev ua tau zoo.

Mechanical Properties ntawm 925 Incoloy