Inconel718 Cov khoom xyaw|Kev Ua Haujlwm|Tshuab|Daim Ntawv Thov
Tom ntej: Inconel 718 (GH4169)
Txheej txheem cej luam:
Feem ntau siv 718 alloy tuaj yeem muab faib ua ob pawg raws li lub zog, 718 raws li AMS specification, nrog lub zog ntawm 150ksi, thiab 718 raws li NACE specification, nrog lub zog tawm los ntawm 120ksi.
Alloy 718 yog nag lossis daus hardenable npib tsib xee-raws li alloy uas nthuav tawm cov txiaj ntsig siab, lub zog tensile thiab creep tawg lub zog nyob rau hauv qhov kub thiab txias ib puag ncig mus txog 704 degree. Lub hnub nyoog hardening cov tshuaj tiv thaiv ntawm alloy 718 kuj qeeb, yog li nws tsis harden nrog cua sov thiab txias thaum annealing thiab vuam. Piv nrog rau lwm cov nickel-based super alloys nrog ntxiv aluminium thiab titanium, alloy 718 muaj cov khoom siv vuam zoo heev.
Hom zoo sib xws:
GH4169, GH169 (Tuam Tshoj),
NC19FeNb (Fabkis),
NiCr19Fe19Nb5, Mo3 (Lub Tebchaws Yelemees),
NA 51 (UK)
Inconel 718, UNS NO 7718 (USA)
NiCr19Nb5Mo3 (ISO)
chemical muaj pes tsawg leeg:
C Tsawg dua lossis sib npaug rau 0.08
Mn Tsawg dua lossis sib npaug rau 0.35
Si Less dua los yog sib npaug rau 0.015
P Tsawg dua lossis sib npaug rau 0.35
S Tsawg dua lossis sib npaug rau 0.015
Txc17–21
Nws 50 ~ 55
Mo2.8 ~ 3.3
Cu Less dua los yog sib npaug rau 0.3
Ti0.65~1.15
Al{0}.2~0.8
Fe margin
Nc4.75~5.5
B Tsawg dua lossis sib npaug rau 0.006
Lub cev muaj zog:
Qhov ceev ρ=8.24g/cm3
Melting kub ntau yam 1260-1320 degree
Mechanical cwj pwm:
Tensile zog: 150ksi thiab siab dua
Yield zog: 120-145ksi
4D elongation: ntau dua 20%
Thaj chaw shrinkage (dia Tsawg dua lossis sib npaug ntawm 10 "): ntau dua 35%
Area shrinkage (dia>10 "): ntau dua 25%
Hardness: 30-40HRC
V-notch cuam tshuam lub zog (-59 degree lossis qis dua):
Lub zog nruab nrab: 35ft / lbs (47J) lossis ntau dua
Lub zog tsawg kawg ib zaug: 30ft / lbs (40J)
Kev kho cua sov
Tshuaj annealing ntawm 1021-1052 degree rau 1-2.5 teev, ces dej quenching. Cov kab uas muaj txoj kab uas hla tsawg dua 3.5" tuaj yeem ua rau dej quenched lossis cua txias. Hnub nyoog ntawm 774-802 degree rau 6-8 teev, ces cua txias.
Kev kho cua sov yuav tsum tau ua los ntawm lub Hoobkas steel, lossis raws li kev taw qhia ntawm lub Hoobkas steel.
daim ntawv thov
Dav hlau cav thiab high-speed airframe qhov chaw xws li lub log, turbine hniav, gaskets, high-temperature bolts, fasteners, thiab lwm yam.
Kev kho cua sov
Txoj Kev 1: Tau txais lub zog tensile zoo tshaj plaws thiab kev ntxhov siab tawg lub zog
954-982 degree , 1 teev, cua txias +718 degree, 8 teev, txias rau 621 degree ntawm 56 degree / teev, kom sov li 8 teev, ces cua txias.
Txoj Kev 2: Tau txais qhov zoo tshaj plaws hauv chav tsev kub thiab tsis kub tensile lub zog
Kev kho cua sov ntawm 1066 degree rau 1-2 teev, cua txias ntawm +718 degree rau 8 teev, txias rau 621 degree ntawm 56 degree / teev, cua sov preservation rau 8 teev, thiab ces cua txias.
Kev ua tau zoo
Thermal ua
Lub qhov cub kub rau kev ua haujlwm thermal tsis tshaj 1121 degree. Yog tias qhov ntsuas kub ua haujlwm qis dua 593 degree, qhov ntsuas kub ntawm kev ua haujlwm txias yog tswj ntawm 927-1010 degree, uas tuaj yeem muab lub zog forging. Tsis txhob siv cua sov ntev hauv lub qhov cub thaum forging.
Tshuab ua
Ob qho tib si annealed thiab hnub nyoog-hardened xeev tuaj yeem machined. Lub hnub nyoog-hardened lub xeev ua rau nws yooj yim rau kev tawg thiab txiav, thiab qhov chaw ua kom tiav zoo dua. Rau cov ntaub ntawv annealed, machined cuab tam lub neej yog me ntsis ntev.
vuam
Ob lub xeev annealed thiab lub xeev hnub nyoog ntawm 718 tuaj yeem welded. Thaum vuam cov ntaub ntawv laus, deformation yuav tshwm sim nyob rau hauv qhov chaw uas lub vuam yog rhuab thiab softened.
