Aero-engine yog ib qho ntawm cov tseem ceeb tshaj plaws ntawm lub dav hlau.Qhov no yog vim nws muaj cov kev cai siab heev thiab nyuaj rau kev tsim khoom.Raws li ib qho tseem ceeb lub zog ntaus ntawv nyob rau hauv lub davhlau txheej txheem ntawm aircraft, nws muaj siab heev yuav tsum tau rau ua cov ntaub ntawv.Nws muaj cov khoom ntawm lub teeb yuag, siab toughness, kub tsis kam, oxidation tsis kam thiab corrosion kuj, thiab cov khoom zoo ntawm superalloy ua rau nws ua tau raws li cov khoom siv aero-engine.
Cov ntaub ntawv superalloy tuaj yeem tswj tau qhov ua tau zoo ntawm qhov kub siab tshaj 600 ° C thiab nyob rau hauv qee qhov kev ntxhov siab.Qhov tshwm sim ntawm cov ntaub ntawv superalloy yog ua kom tau raws li qhov xav tau ntawm cov cuab yeej siv dav hlau niaj hnub no.Tom qab xyoo ntawm cov khoom evolution, superalloys tau dhau los ua cov ntaub ntawv tseem ceeb rau cov khoom siv aerospace tsim cov khoom kub-kawg.Raws li cov ntaub ntawv hais txog, nyob rau hauv aero-engines, Nws siv nyiaj ntau tshaj ib nrab ntawm tag nrho cov khoom siv cav.
Nyob rau hauv niaj hnub aero-engines, kev siv cov ntaub ntawv superalloy yog qhov loj, thiab ntau lub cav yog tsim nrog superalloys, xws li combustion chambers, guide vanes, turbine blades, thiab turbine disk casings, rings, and afterburners.Cov khoom xws li combustion chambers thiab tail nozzles yog tsim los ntawm cov khoom siv superalloy.
Kev siv superalloy hauv aeroengine
Nrog rau kev hloov pauv tas mus li ntawm cov thev naus laus zis thiab kev ua kom tob zuj zus ntawm thaj chaw ntawm kev tshawb nrhiav, kev tshawb fawb ntawm rhenium-muaj cov siv lead ua ib leeg thiab cov superalloys tshiab yuav txuas ntxiv mus tshawb nrhiav.Cov ntaub ntawv tshiab yuav ntxiv lub zog tshiab rau kev ua haujlwm ntawm kev tsim khoom siv aerospace yav tom ntej.
1. Kev tshawb fawb ntawm ib leeg siv lead ua cov hniav uas muaj rhenium
Qee cov kev tshawb fawb tau pom tias thaum ua cov ntaub ntawv nrog ib qho siv lead ua muaj pes tsawg leeg, ob qho tib si alloy cov khoom thiab cov txheej txheem cov khoom yuav tsum tau muab coj los rau hauv tus account, vim hais tias ib qho crystals yuav tsum tau siv nyob rau hauv ib puag ncig hnyav, yog li qee qhov alloying ntsiab lus nrog cov teebmeem tshwj xeeb feem ntau ntxiv rau cov khoom siv. cov ntaub ntawv los txhim kho.ib leeg siv lead ua zog.Nrog rau txoj kev loj hlob ntawm ib leeg siv lead ua alloys, cov tshuaj muaj pes tsawg leeg ntawm cov alloy tau hloov.Nyob rau hauv cov khoom, yog hais tias cov platinum pab pawg neeg cov ntsiab lus (xws li Re, Ru, Ir cov ntsiab lus) ntxiv, cov ntsiab lus ntawm refractory ntsiab W, Mo, Re, thiab Ta tuaj yeem nce ntxiv.Ua kom tag nrho cov ntsiab lus uas nyuaj rau yaj, kom cov ntsiab lus xws li C, B, Hf tuaj yeem hloov pauv ntawm lub xeev "tshem tawm" mus rau lub xeev "siv";txo cov ntsiab lus ntawm Cr.Nyob rau tib lub sijhawm, ntxiv lwm cov ntsiab lus alloying tuaj yeem ua rau cov khoom muaj kev ruaj ntseg ntawm cov khoom siv sib txawv.
Kev siv cov rhenium-muaj ib lub ntsej muag siv lead ua tuaj yeem txhim kho nws qhov kub thiab txias thiab txhim khu lub zog creep.Ntxiv 3% rhenium rau ib leeg siv lead ua alloy thiab tsim nyog nce cov ntsiab lus ntawm cobalt thiab molybdenum cov ntsiab lus tuaj yeem ua rau qhov kub thiab txias tsis kam los ntawm 30 ° C, thiab lub zog ruaj khov thiab oxidation corrosion kuj tuaj yeem ua kom zoo.xeev, uas yuav muaj txiaj ntsig zoo rau daim ntawv thov loj ntawm rhenium-muaj cov siv lead ua ib leeg nyob rau hauv aerospace teb.Kev siv rhenium-muaj cov ntaub ntawv siv lead ua ib leeg rau aero-engine turbine blades yog ib qho qauv yav tom ntej.Ib leeg siv lead ua cov hniav muaj qhov zoo ntawm qhov kub thiab txias, thermal qaug zog lub zog, oxidation tsis kam thiab corrosion kuj.
2. Kev tshawb fawb ntawm superalloys tshiab
Muaj ntau ntau hom khoom siv superalloy tshiab, cov khoom siv ntau dua yog hmoov superalloy, ODS alloy, intermetallic compound thiab kub kub hlau nws tus kheej lubricating khoom.
Hmoov superalloy khoom:
Nws muaj qhov zoo ntawm cov qauv sib xws, siab tawm los thiab kev ua haujlwm zoo qaug zog.
Intermetallic compounds:
Nws tuaj yeem txo qhov hnyav ntawm cov khoom thiab txhim kho kev ua tau zoo, uas yog qhov tsim nyog rau kev ua lub zog propulsion systems.
ODS alloys muaj:
Zoo heev kub creep kev ua tau zoo, kub oxidation kuj
High-temperature metal-based self-lubricating cov ntaub ntawv:
Nws yog tsuas yog siv los tsim high-temperature self-lubricating bearings, uas ua rau kom lub zog ntawm cov kabmob thiab txhim kho cov kabmob muaj peev xwm.
Nrog rau kev nce ntxiv ntawm superalloy nyuaj hlab hauv aero-engines, qhov kev thov rau lawv yuav nce ntxiv rau yav tom ntej aerospace teb.
Post lub sij hawm: Mar-02-2023