Vim li cas INCONEL 718 hu ua super alloy?
Inconel 718 (los yog Alloy 718) yog ib hom tshwj xeeb ntawm lub zog siab, kub-kub alloy nrog nickel-chromium puag uas tiv taus corrosion, siab siab thiab kub siab txog 700 degree.
Cov khoom siv yog tsim los ntawm 50-55% npib tsib xee, 17-21% chromium, 4.75-5.5% niobium thiab tantalum, thiab cov lej ntawm molybdenum, titanium, cobalt, aluminium, manganese, tooj liab , silicon thiab lwm yam khoom.
Vim nws cov khoom tshwj xeeb, Inconel 718 tau siv ntau yam kev siv xws li kev tsim khoom mus rau cov khoom siv tub rog thiab kev lag luam aerospace.
Nta ntawm Inconel 718
Kub tiv taus
Inconel 718 muaj qhov melting point ntawm 1430 degree thiab muab cov cua sov zoo thiab kub ua haujlwm. Nws kuj ua haujlwm zoo ntawm qhov kub thiab txias, uas qhia tau hais tias qhov kub thiab txias ntawm cov khoom muaj.
natural thermal tiv thaiv
Cov nickel superalloy no muaj lub peev xwm los tsim cov txheej txheem oxide muaj zog thiab ruaj khov thaum rhuab. Cov cuab yeej no ntuj passivation tiv thaiv cov khoom ntawm kev puas tsuaj.
Corrosion kuj
Ib txheej tiv thaiv oxide muab qhov Inconel variant tseem ceeb tiv thaiv oxidation, yog li tiv thaiv nws los ntawm corrosion.
High mechanical zog
Nyob rau hauv chav tsev kub, cov ntaub ntawv superalloy muaj qhov tsawg kawg nkaus lub zog ntawm 725 MPa thiab lub zog tensile yam tsawg kawg nkaus ntawm 1035 MPa. Thaum Inconel 718 yog tov thiab precipitated, cov nuj nqis no nce mus rau 1035 MPa thiab 1240 MPa feem.
Zoo heev welding zoo
Lwm yam Inconel alloys nyuaj rau welding vim brittleness thiab cracking ntawm meej weld cov ntsiab lus. Txawm li cas los xij, Inconel 718 tau tsim los daws qhov teeb meem no, txawm tias siv hluav taws xob hluav taws xob lossis arc vuam.
Zoo ductility thiab kev ua tau zoo
Feem ntau Inconel alloys zoo li raug mob hnyav thaum sim ua machined lossis tsim. Inconel 718 yog qhov sib txawv - nws yooj yim dua rau tshuab siv cov cuab yeej txiav nyuaj los ntawm kev txiav qeeb qeeb.
Tom qab cov khoom muaj hnub nyoog tag nrho, qhov kub-kub alloy no tuaj yeem threaded los ntawm induction cua sov ntawm 700 degree.
Kev tsim khoom thiab kev ua haujlwm
Inconel 718 tuaj yeem tsim los ntawm cov txheej txheem hauv qab no:
Annealing: Hlau yog rhuab thiab ces maj mam txias mus rau ib tug qis kub. Qhov no muab cov khoom siv zog thiab muaj peev xwm tiv taus compression.
Precipitation Hardening: Kuj hu ua lub hnub nyoog hardening lossis nag lossis daus los kho cua sov, txoj kev no ua rau lub zog ntawm cov hlau los ntawm kev qhia impurities ua ntej cua sov.
Nyob rau hauv annealing (tseem hu ua kev daws teeb meem ntxiv dag zog), cov khoom siv hlau yog yaj tag kom lawv tuaj yeem ua kom dej nag, muab Inconel 718 lub zog nws tau tsim los tsim nyog.
Hauv nag lossis daus, npib tsib xee thiab niobium ua ke los ua gamma bis (lossis Ni3Nb). Cov cua kub siab tshaj 800 degree tuaj yeem ua rau nag lossis daus ntawm nickel theem.
Nws ua raws li Inconel 718 tuaj yeem ua rau hauv cov duab kev cai thiab kev taw qhia thaum ua tiav saum 540 degree.
Kev siv ntawm Inconel 718
3D luam ntawv
Inconel 718 tau dhau los ua kev cuam tshuam nrog 3D tshuab luam ntawv raws li cov alloy zoo luam tawm qhov chaw thoob plaws ntau yam kev lag luam. Ntau qhov kev tshawb fawb tau tshawb fawb txog kev siv superalloys hauv kev lag luam additive manufacturing (AM) thiab lawv cov kev txhim kho ntxiv los ua kom lawv txoj haujlwm zoo tshaj plaws.
Gas turbine cav qhov chaw
Vim lawv cov weldability zoo thiab kub tsis kam, superalloys tau dhau los ua ib feem ntawm cov roj turbine xyaw.
Aerospace thiab aircraft manufacturing
Vim yog cov khoom siv lub zog thiab ua haujlwm ntev, Inconel 718 tau dhau los ua cov khoom siv nrov rau turbojet cav qhov chaw xws li compressor casings, discs, thiab kiv cua. Qhov no high-temperature alloy kuj yog siv nyob rau hauv zus tau tej cov foob pob ua ntxaij cav, tshwj xeeb tshaj yog vim lub alloy lub siab kub kuj. Qhov no yog qhov laj thawj tseem ceeb vim li cas Inconel 718 yog siv nyob rau hauv kwv yees li ib nrab ntawm cov pa roj cav qhov chaw.
tuag casting
Qhov no Inconel variant ua haujlwm zoo nyob rau hauv qhov chaw kub, ua rau nws zoo tagnrho rau kev siv kub kub xws li hlau tuag casting. Lwm cov hlau nonferrous yog nrov dua hauv kev lag luam, tab sis Inconel 718 yog tawv txaus los tiv thaiv nws tus kheej los ntawm kev puas tsuaj. Yog li ntawd, cov pwm los yog pwm hauv paus ua los ntawm Inconel 718 muaj lub neej ua haujlwm ntev dua thiab ua haujlwm zoo dua rau deformation.
