1: Dab tsi yog qhov tseem ceeb ntawm metallurgical khoom uas txawv Incoloy 903 (UNS N19903) los ntawm lwm cov high -lub zog superalloys, thiab vim li cas qhov no tseem ceeb rau cov khoom siv hluav taws xob thiab cov khoom siv kho cua sov?
Tus yam ntxwv txhais ntawm Incoloy 903 yog nws qhov kev ua haujlwm qis coefficient ntawm thermal expansion (CTE), ua ke nrog lub zog siab ntawm qhov kub siab. Qhov kev sib xyaw tshwj xeeb no tau ua tiav los ntawm kev tshwj xeeb npib tsib xee- hlau-cobalt matrix muaj pes tsawg leeg (~38% Ni, ~ 41% Fe, ~ 15% Co) thiab nag lossis daus los ntawm gamma prime [ ', Ni₃(Al, Ti)].
Tswj Thermal Expansion: Tsis zoo li feem ntau superalloys, uas yog tsim los rau siab tshaj plaws creep resistance los yog oxidation tsis kam, Incoloy 903 yog formulated kom muaj ib tug CTE kwv yees li 30-50% qis dua tus qauv austenitic stainless hlau (piv txwv li, 304, 310) tshaj li ntawm chav tsev kub txog li 540℃F (100 degree). Nws CTE zoo sib xws rau qee yam ferritic steels thiab superalloys siv rau shafts.
Kev tuav lub zog siab: Txawm hais tias tsom rau CTE, nws tuav cov txiaj ntsig zoo thiab lub zog tensile ntawm qhov kub txog li 650℃(1200℃F), nrog rau chav tsev kub yield zog tshaj 860 MPa (125 ksi) nyob rau hauv tag nrho cov cua sov- kho mob.
Qhov tseem ceeb rau Cov Hluav Taws Xob: Hauv kev tsim hluav taws xob hluav taws xob, cov khoom siv xws li fixturing, trays, baskets, retorts, and fan shafts are over repeated, heavy thermal cycling. Cov khoom siv nrog CTE siab yuav nthuav dav thiab sib cog lus nrog txhua lub voj voog, ua rau thermally induced nkees, warping, thiab thaum kawg, ua tsis tiav ntxov ntxov. Incoloy 903 qhov qis CTE txo qis cov kev hloov pauv no, txo qis kev ntxhov siab thaum caij tsheb kauj vab. Qhov no txhais tau tias muaj kev ruaj ntseg zoo dua qub, kev pab lub neej ntev dua, thiab txo qis qis rau cov cuab yeej hluav taws xob tseem ceeb.
2: Nyob rau hauv qhov tshwj xeeb siab - qhov kub thiab txias daim ntawv thov kev kho cua sov yog Incoloy 903 phaj thiab daim ntawv xaiv cov khoom siv irreplaceable?
Incoloy 903 tau teev tseg rau cov ntawv thov uas qhov kev tswj xyuas qhov tseeb thiab kev ncaj ncees ntawm cov qauv yog qhov tseem ceeb thoob plaws ntau txhiab lub voj voog thermal. Nws lub niche tsis yog qhov kev pabcuam kub siab tshaj plaws, tab sis qhov xav tau tshaj plawscyclickev pabcuam.
Thaum tshav kub kub kho Fixtures: Nws yog cov khoom tseem ceeb rau carburizing thiab nitriding tais, pob tawb, thiab daim phiaj. Cov khoom siv no yuav tsum nqa cov khoom hnyav (feem ntau cov hlau) los ntawm kev rov ua dua mus txog 1050℃(1925℃F). Thaum Incoloy 903 lub siab oxidation txwv nyob ib ncig ntawm 815℃(1500℃F), nws tsis kam mus rau carburizing / nitriding cua thiab nws stability nyob rau hauv load ntawm cov kub no zoo heev. Nws qis CTE tiv thaiv pob tawb los ntawm warping thiab khi.
Brazing Retorts & Furnace Muffles: Rau cov cua kub tswj cov cua sov, cov retorts loj lossis cov muffles ua los ntawm Incoloy 903 daim ntawv / welded phaj muab cov pa roj- nruj chamber. Lawv qhov kev ruaj ntseg zoo ua kom zoo sib xws ntawm ntau lub voj voog thiab tiv thaiv kev tawg ntawm welds vim qhov sib txawv ntawm kev nthuav dav.
High-Ntxuam Ntxuam Ncej & Tsav Cheebtsam: Hauv cov chaw tsim khoom loj thiab cov khoom siv hluav taws xob, cov cua txias lossis cov kiv cua rov ua haujlwm hauv thaj chaw kub. Cov ncej ua los ntawm Incoloy 903 forgings los yog tuav tau txais txiaj ntsig los ntawm nws cov kev sib xyaw ua ke ntawm siab - qhov kub thiab txias, qis CTE (kom phim rau lwm yam khoom siv), thiab kev nkag siab zoo, ua kom ntseeg tau, kev co - ua haujlwm dawb.
Aerospace Tooling: Rau qhov kub thiab txias kev kho cua sov ntawm titanium thiab npib tsib xee-raws li superalloy aerospace Cheebtsam, tooling tuag thiab fixtures ua los ntawm Incoloy 903 tiv thaiv distortion nyob rau hauv rov qab thermal cycling, xyuas kom meej qhov seem ntawm cov khoom tsim.
3: Dab tsi yog qhov tseem ceeb, ntau- cov txheej txheem kev kho cua sov uas yuav tsum tau ua rau Incoloy 903 kom ua tiav nws qhov kev pom zoo qis -CTE thiab siab- lub zog muaj zog, thiab qhov txiaj ntsig ntawm kev sib txawv yog dab tsi?
Cov khoom ntawm Incoloy 903 tsis muaj nyob rau hauv nws muaj pes tsawg leeg; lawv yogqhiblos ntawm ib qho tshwj xeeb thiab tsis yog - sib tham tau thermal ua ntu zus. Qhov sib txawv tuaj yeem ua rau CTE tswj tsis zoo lossis tsis muaj zog txaus.
Kev kho cua sov txheem (Ib qho AMS 5803):
Kev Kho Mob: Kub rau 980℃± 15℃(1795℃F), tuav, ces txias sai (dej quench lossis cua txias ceev). Qhov no dissolves cov ntsiab lus alloying (Al, Ti, Nb) rau hauv ib qho kev daws teeb meem.
Thermal Stabilization: Tam sim ntawd tom qab kho kev daws teeb meem, cov khoom tau dhau los ua cov kauj ruam ruaj khov ntawm 790℃± 15℃(1455℃F) rau 4 teev, ua raws li cua txias. Cov kauj ruam no yog qhov tseem ceeb rau kev pib tsim cov kev xav tau 'thiab lwm theem hauv kev tswj hwm.
Kev laus kev kho mob: Cov kauj ruam kawg yog ob lub hnub nyoog: Ua ntej, 720℃± 15℃(1330℃F) rau 8 teev, rauv txias rau 620℃± 15℃(1150℃F), ces tuav ntawm 620℃rau tag nrho lub sijhawm laus (los ntawm pib ntawm 720℃kauj ruam) ntawm 18 teev.
Qhov "Ceev faj ntawm Deviation": Qhov kev ua tiav meej no yog tsim los ua kom lub cev tsis sib xws, zoo dispersion ntawm 'theem (Ni₃(Al,Ti))) thiab theem η (Ni₃Ti), uas yog qhov tseem ceeb rau nws lub zog thiab, qhov tseem ceeb, nws qis CTE. Kev hla lossis hloov cov kauj ruam kom ruaj khov tuaj yeem ua rau tsis muaj kev tswj xyuas theem tsim thaum muaj kev laus, ua rau CTE siab tshaj qhov teev thiab tsis sib haum ntawm batch mus rau batch. Cov cua txias tsis zoo tuaj yeem ua rau cov qoob loo ntau dhau los nag lossis daus, ua rau embrittlement. Rau cov khoom siv hluav taws xob, kev kho cua sov sib txawv txhais tau hais tias cov khoom siv yuav tsis pom qhov kev cog lus thermal stability thiab yuav ua tsis tiav ntxov vim yog distortion los yog tawg.
4: Dab tsi yog cov teeb meem tseem ceeb thiab cov kev coj ua zoo tshaj plaws hauv kev vuam thiab fabricating cov khoom los ntawm AMS 5803 phaj, muab nws cov cim metallurgy?
Fabricating Incoloy 903 yuav tsum tau ua raws li cov txheej txheem tsim los tiv thaiv kev tawg thiab khaws nws cov ncej -weld heat treatment teb.
Kev sib tw thawj zaug - Lim- Hnub nyoog tawg: Qhov no yog qhov txaus ntshai tshaj plaws. Incoloy 903, zoo li ntau nag lossis daus- cov alloys hardening, yog qhov muaj feem cuam tshuam rau kev tawg hauv tshav kub- thaj chaw cuam tshuam (HAZ) tom qab vuam yog tias muaj kev ntxhov siab nyob thiab cov khoom siv tom qab hnub nyoog (xws li txhob txwm los yog los ntawm kev txias qeeb). HAZ ua "hardened" los ntawm vuam cua sov, tsim kom muaj ib qho chaw tawg.
Fabrication & Welding Qhov Zoo Tshaj Plaws:
Fabricate nyob rau hauv Annealed/Solution-Kho mob mob: Tag nrho cov tsim, machining, thiab vuam yuav tsum ua kom tiav ua ntej qhov kawg kev laus kho. Lub xeev zoo tshaj plaws yog tam sim tom qab- kev daws teeb meem (mos thiab zawm).
Vuam txheej txheem: Gas Tungsten Arc Vuam (GTAW/TIG) yog qhov xav tau zoo rau nws cov kev tswj xyuas cov cua sov.
Filler Hlau: Siv qhov sib txuam- cov khoom muab tub lim hlau (piv txwv li, lub rooj sib tham hlau AMS 5803 chemistry) los yog ntau tshaj -alloyed npib tsib xee-raws li ERNiCr-3 (Inconel 625 muab tub lim). Lub 625 muab tub lim tuaj yeem pab txo qhov tawg vim nws cov ductility ntau dua thiab ua haujlwm rau kev laus tom qab vuam.
Preheat & Interpass Temperature: Siv lub preheat qis (~ 150-200℃/ 300-400℃F) thiab tswj qhov kub ntawm qhov sib cuam tshuam kom txo qis thermal poob siab.
Ncej -Weld Heat Treatment (PWHT) Qhov tseem ceeb: Tom qab vuam, qhovtag nrho cov khoomyuav tsum tau ua kom tiav tag nrho re- kev daws teeb meem thiab ua tiav peb - kauj ruam kev laus raws li tau piav qhia hauv Q3. Qhov no tsis yog -kev sib tham kom yaj cov theem HAZ uas tsis xav tau, txo cov kev ntxhov siab ntawm qhov sib xws, thiab rov ua dua - ua kom cov theem ntxiv dag zog kom raug thoob plaws ib feem kom ua tiav cov khoom tsim qis -CTE.
5: Incoloy 903 piv rau kev ua haujlwm thiab kev lag luam li cas rau lwm cov khoom siv hluav taws xob zoo li RA330 lossis Inconel 600 rau lub sijhawm ntev -, kev pabcuam cyclic?
Qhov kev xaiv ntawm cov alloys no yog kev lag luam ntshiab- tawm ntawm tus nqi pib thiab kev ua tau zoo hauv kev pabcuam cyclic.
vs. RA330 (UNS N08330 - Siab-Temp Austenitic Stainless):
Kev ua tau zoo: RA330 muaj oxidation zoo heev thiab carburization tsis kam mus txog ~ 1150℃(2100℃F) thiab feem ntau yog yooj yim rau vuam thiab fabricate. Txawm li cas los xij, nws muaj ntau dua CTE thiab qis zog ntawm qhov kub thiab txias dua Incoloy 903.
Kev lag luam: RA330 muaj tus nqi pib qis dua.
Kev Xaiv Txoj Cai: Siv RA330 rau cov khoom zoo li qub lossis cov khoom siv me me hauv cov cua oxidizing / carburizing ntawm qhov kub siab tshaj qhov kev ruaj ntseg ntawm qhov tsis tshua muaj qhov tseem ceeb. Siv Incoloy 903 rau cov khoom siv hnyav hnyav, cov qauv kev txhawb nqa tseem ceeb, lossis txhua daim ntawv thov uas warping los ntawm thermal cycling yog thawj hom tsis ua haujlwm. Tus nqi siab dua ntawm 903 yog qhov ncaj ncees los ntawm nws txoj kev pab cuam lub neej ntev heev hauv kev thov rau kev siv cyclic.
vs. Inconel 600 (UNS N06600 - Nickel-Chromium Alloy):
Kev ua tau zoo: Inconel 600 muaj qhov zoo oxidation tsis kam thiab ua haujlwm ntau yam. Txawm li cas los xij, nws yog ib qho khoom siv - daws cov alloy muaj zog, txhais tau hais tias nws muaj zog qis dua ntawm qhov kub thiab txias piv rau nag lossis daus - hardened 903. Nws CTE kuj siab dua, zoo ib yam li tus qauv austenitics.
Kev lag luam: Inconel 600 feem ntau kim dua RA330 tab sis tej zaum yuav piv rau lossis tsawg dua Incoloy 903, nyob ntawm daim ntawv thiab kev ua lag luam.
Txoj Cai Xaiv: Siv Inconel 600 rau kev tiv thaiv corrosion / oxidation nyob rau hauv cov cua kub cua uas tsis tas yuav muaj zog. Siv Incoloy 903 tshwj xeeb thaum koj xav tau kev sib xyaw tshwj xeeb ntawm lub zog siab thiab qis thermal expansion kom tsis txhob muaj kev cuam tshuam hauv kev thauj khoom thaum caij tsheb kauj vab.
Hauv cov ntsiab lus, Incoloy 903 yog tus hwm zoo, lub hom phiaj - kev daws teeb meem engineering. Nws tus nqi tsis yog qhov "zoo tshaj" ntawm ib qho khoom ntiag tug, tab sis hauv kev muab kev sib txuam tsis sib xws ntawm cov thermal expansion thiab siab zog, ua rau nws tus nqi ntau tshaj - kev xaiv zoo tshaj tag nrho lub neej voj voog rau feem ntau xav tau kev siv lub tshuab ua cua sov.
