Titanium alloy yog ib tug matrix ntawm titanium nrog ntau yam alloying ntsiab xws li txhuas, vanadium, molybdenum thiab hlau ntxiv, uas yog ib yam ntawm siab - cov khoom siv hlau. Nws tau ua nws txoj hauv kev mus rau hauv kev lag luam aerospace sai heev txij li kev tsim khoom lag luam tau dhau los ua tau nyob rau xyoo 1950 vim tias nws cov khoom tag nrho tau zoo dua li cov khoom siv hlau tsoos, thiab tam sim no nws tau dhau los ua cov khoom tseem ceeb hauv kev lag luam aerospace. Titanium alloys kuj muaj kev tiv thaiv zoo corrosion, zoo qaug zog zog, thiab muaj cua sov kho tau thaum piv rau cov tsoos hlau thiab txhuas alloys.
Cov txiaj ntsig tseem ceeb no ua rau lawv ua tau raws li qhov yuav tsum tau ua ntawm kev lag luam aerospace rau cov khoom siv nrog "kev ua haujlwm siab, hnav, thiab kev ntseeg siab". Lawv txoj haujlwm tsis tuaj yeem hloov pauv tau raug txheeb xyuas tag nrho hauv - lub sijhawm ua haujlwm engineering thiab tau dhau los ua cov ntaub ntawv tseem ceeb rau kev txhawb nqa kev rov ua dua thiab kho dua tshiab ntawm aerospace technology. cov
Hauv kev tsim qauv hauv aerospace, kev xaiv cov ntaub ntawv yuav tsum tsis yog tsuas yog ua tau raws li qhov kawg ntawm lub zog, tab sis kuj suav nrog lub teeb yuag, kev nyab xeeb, thiab kev ntseeg siab ntev ntev. Peb qhov kev xav tau tseem ceeb no ncaj qha txiav txim siab lub davhlau kev ua haujlwm, ntau yam, lub peev xwm thauj khoom, thiab kev pabcuam lub neej ntawm cov cuab yeej siv dav hlau, thiab yog qhov tseem ceeb hauv kev tsim qauv hauv aerospace engineering. Txawm hais tias cov hlau ib txwm muaj lub zog siab, nws qhov ceev yog siab dhau (txog 7.85g / cm³). Yog tias siv dav hauv cov cuab yeej siv dav hlau, nws yuav ua rau muaj qhov hnyav ntawm lub fuselage, yog li txo qhov ntau thiab muaj peev xwm thauj khoom ntawm cov cuab yeej, nce roj noj, thiab tsis nyob rau hauv txoj kab nrog txoj kev loj hlob ntawm "lub teeb yuag" hauv kev lag luam aerospace; Txawm hais tias aluminium alloy tuaj yeem ua tiav lub hom phiaj ntawm lub teeb yuag zoo (nrog qhov ntom ntawm li 2.7g / cm³), nws lub zog thiab kub tsis kam muaj qhov tsis zoo. Nws yog nquag deformation thiab kev ua haujlwm degradation nyob rau hauv qhov kub thiab txias ib puag ncig, thiab tsis tuaj yeem ua tau raws li lub sijhawm ntev - siv cov kev cai ntawm cov tub ntxhais load-cov kabmob xws li cov tshuab dav hlau thiab cov iav tsaws. Thiab titanium alloy zoo kawg nkaus them nyiaj rau qhov tsis txaus ntawm ob qho tib si, nrog rau qhov ntom ntawm 4.5g / cm³, tsuas yog 60% ntawm cov hlau, tab sis lub zog tensile ntawm 800-1200MPa, ze rau lossis ntau tshaj qee qhov siab - zog steels. Cov yam ntxwv tshwj xeeb ntawm "lub teeb thiab muaj zog" ua rau nws yog ib qho khoom siv zoo tshaj plaws rau cov khoom siv dav hlau, cov khoom siv hauv lub cav, thiab cov tshuab ceev ceev, thiab qhov tseem ceeb ntawm kev ua tiav qhov sib npaug ntawm cov khoom siv aviation thiab kev ua haujlwm siab. cov
Ntawm ntau qib titanium alloy, ntau hom titanium alloys muaj lawv tus kheej qhov tseem ceeb ntawm kev ua tau zoo vim qhov sib txawv ntawm qhov sib piv, thiab tsim nyog rau ntau yam kev thov hauv kev lag luam aerospace. Ntawm lawv cov feem ntau nrov thiab technically paub tab alpha + beta titanium alloy rau daim ntawv thov nyob rau hauv aerospace yog ASTM Qib 5 (Ti-6Al-4V). Cov ntsiab lus cawv yog 6% alomuminum, 4% vanadium thiab lwm yam titanium. Qhov kev faib ua feem ntawm cov hlau no ua kom lub zog siab ntawm cov khoom siv tib lub sijhawm cia cov yas zoo thiab kev ua haujlwm kom tau raws li cov kev xav tau ntawm cov khoom nyuaj. Tam sim no, nws tau dav siv nyob rau hauv qhov tseem ceeb xws li aircraft tsaws iav, tis connectors, cav compressor hniav, casings, thiab fuselage ntas.
Raws li kev txheeb cais, nyob rau hauv tiam tshiab ntawm pej xeem aircraft xws li Boeing 787 thiab Airbus A350, tus nqi ntawm Ti-6Al-4V alloy siv nyiaj rau ntau tshaj 70% ntawm tag nrho cov nyiaj ntawm titanium alloy siv nyob rau hauv lub fuselage. Nws cov kev ua tau zoo tshaj plaws ua tau zoo txhim kho kev nyab xeeb thiab kev lag luam ntawm lub dav hlau; Nyob rau hauv qhov tseem ceeb txuas qhov chaw ntawm lub tsaws iav thiab lub cav ncua kev kawm ntawv ntawm Tuam Tshoj lub C919 loj neeg nrog caij dav hlau, qib no ntawm titanium alloy kuj yog lug siv, uas muaj peev xwm tiv taus lub zog loj heev thaum lub sij hawm takeoff thiab tsaws thiab alternating load thaum lub sij hawm ntev kev pab cuam, muab ib tug ruaj guarantee rau kev nyab xeeb ya davhlau.Ntxiv rau, Ti-5Al-2. 5Ti-5Al{10}}Ti-5Al -2. 5Snium alloys nyob rau hauv cov khoom txias compression thiab lwm yam. cav vim qhov kub thiab txias thiab oxidation tsis kam; Ti-10V-2Fe-3Al thiab lwm yam-type titanium alloys tau dav siv rau lub dav hlau fuselage tawv thiab cov qauv txheej txheem ua haujlwm raws li qhov ua tau zoo ntawm cov yas zoo, lub zog siab thiab kev ua haujlwm yooj yim thiab kev tsim, yog li ua kom pom qhov muaj peev xwm ntawm titanium alloy hauv aerospace teb.
Tsis tas li ntawd, titanium alloys tuaj yeem ua haujlwm ruaj khov ntawm qhov kub thiab txias ib puag ncig, uas yog qhov tseem ceeb tshwj xeeb rau cov tshuab dav hlau. Raws li "lub plawv" ntawm cov cuab yeej siv dav hlau, qhov chaw ua haujlwm ntawm cov tshuab dav hlau yog qhov hnyav heev. Cov khoom tseem ceeb ntawm cov khoom siv yuav tsum tau ua haujlwm tsis tu ncua thiab ntev ntev nyob rau hauv ib puag ncig ntawm qhov kub thiab txias, kev kub siab, cov av noo thiab siab corrosion, uas ua rau muaj kev xav tau siab heev rau cov khoom siv hauv kev tiv thaiv - oxidation thiab anti- creep, thiab tseem cuam tshuam ncaj qha rau lub neej thiab kev ruaj ntseg ntawm lub cav. Lub creep thiab oxidation tsis kam ntawm titanium alloys yog qhov zoo tshaj rau cov aluminium alloys.
Txhua yam khoom ntawm txhuas thiab nws cov alloys degrade sai heev nyob rau hauv ib puag ncig tshaj 250 degree, yog li lawv tsis tuaj yeem siv ruaj khov rau lub sijhawm ntev. Tab sis titanium alloys yuav tsum tsis tsuas yog yuav tsum tau ua hauj lwm nyob rau hauv qhov ntau ntawm 300-500℃rau lub sij hawm ntev, tab sis kuj nyob rau hauv ib co kub resistant titanium alloys (xws li Ti-6Al-2Sn-4Zr-2Mo) rau lub sij hawm luv luv txawm nyob rau ntawm 600℃. Lawv creep kuj yog 3 mus rau 5 npaug ntawm aluminium alloys. Nyob rau hauv qhov yuav tsum tau mus kuaj creep, ntawm 500℃rau 100 h nyob rau hauv kev sim tej yam kev mob, lub creep strain ntawm titanium alloy yog tsawg tshaj li 0.15%, uas yog ib qho kev txiav txim ntawm magnitude tsawg tshaj li creep strain (ntau tshaj 1.5%) ntawm aluminium alloy, qhov no yuav zoo tiv thaiv cov khoom los ntawm deformed thiab puas nyob rau hauv lub sij hawm ntev kub ua hauj lwm. Nyob rau tib lub sijhawm, txheej tuab ntawm titanium oxide zaj duab xis (lub thickness yog kwv yees li 5-10nm) yuav cia li tsim nyob rau saum npoo ntawm titanium alloy, uas tuaj yeem tiv thaiv corrosion ntawm kev tawm tsam, xws li huab cua, chav dej thiab roj. Nws cov corrosion kuj yog superior rau cov hlau tsis muaj steel, thiab nws tseem tuaj yeem ua kom muaj kev ruaj ntseg hauv cov cheeb tsam nyuaj, xws li huab cua hauv hiav txwv, qhov chaw siab siab muaj zog ultraviolet, acidic thiab alkaline xov xwm uas tiv thaiv qhov corrosion-induced tsis ua hauj lwm ntawm cov khoom mus rau ib tug zoo extension, nce aircraft kev pab cuam los ntawm ib tug loj margin thiab txo nqi txij nkawm.
Kev ntsuam xyuas tib neeg: 87% (Al ntsiab lus: 60%) Txhais tam sim no Los ntawm kev tsim cov ntsiab lus ntawm kev pom, titanium alloys tuaj yeem ua tiav siv cov kev ua haujlwm kub, ua haujlwm txias, machining, vuam, 3D luam ntawv thiab lwm yam. Cov txheej txheem ua haujlwm saum toj no ua tau raws li cov kev cai nruj ntawm kev lag luam aviation ntawm 3D cov qauv txheej txheem, cov khoom siv siab thiab cov khoom sib xws siab, ua rau muaj peev xwm ntawm batch thiab refined manufacturing ntawm aerospace qhov chaw. Titanium alloy forgings ceev tuaj yeem ncav cuag 99.8%, uas tuaj yeem ntxuav qhov tsis xws luag xws li qhov hws thiab tawg hauv cov khoom, thiab txhim kho lub zog thiab kev ntseeg siab ntawm cov khoom kom zoo. Qhov ntom ntawm titanium alloy forgings tuaj yeem ncav cuag ntau dua 99.8%, tshem tawm qhov tsis xws luag xws li lub qhov hws thiab tawg hauv cov khoom, txhim kho lub zog thiab kev ntseeg siab ntawm cov khoom. Nws yog feem ntau siv rau hauv kev tsim cov khoom tseem ceeb xws li aircraft tsaws iav thiab cav turbine discs uas tiv taus siab loads; Titanium alloy dov daim hlau thiab profiles yog dav siv nyob rau hauv fuselage daim tawv nqaij, tis ua ntug thiab lwm yam, uas muaj peev xwm ua tau raws li qhov yuav tsum tau ntawm lub teeb yuag thiab tsim ntawm cov khoom; Precision machining thev naus laus zis tuaj yeem ua tiav qib siab - precision dimensional tswj ntawm titanium alloy Cheebtsam, kom ntseeg tau qhov tseeb ntawm cov khoom sib dhos; Nyob rau hauv xyoo tas los no, kev tsim 3D tshuab luam ntawv sai sai tau rhuav tshem cov kev txwv ntawm cov txheej txheem ua haujlwm ib txwm muaj thiab tuaj yeem ncaj qha tsim cov titanium alloy cov qauv nrog cov duab nyuaj. Qhov no tsis tsuas yog shortens lub voj voog ntau lawm tab sis kuj txo cov khoom pov tseg thiab cov nqi tsim khoom. Tam sim no, nws tau siv nyob rau hauv kev tsim cov khoom xws li satellite brackets thiab complex engine pipelines.
Hauv cov ntsiab lus, titanium alloys, nrog lawv lub zog tshwj xeeb, kev kub siab ua haujlwm zoo, kev tiv thaiv corrosion, kev ua haujlwm zoo qaug zog, thiab kev ua haujlwm zoo, ua tau raws li qhov xav tau ntawm kev lag luam aerospace thiab ua lub luag haujlwm tseem ceeb hauv cov khoom tseem ceeb xws li cov qauv fuselage, aircraft engine, thiab fastening systems. Nws tsis yog tsuas yog cov khoom tseem ceeb hauv cov khoom siv hauv aerospace xwb, txhawb kev txhim kho cov cuab yeej siv dav hlau mus rau lub teeb yuag, siab -kev ua tau zoo, thiab ntev- lub neej, tab sis kuj sawv cev rau cov kev taw qhia thev naus laus zis ntawm kev lag luam siab - kawg kev lag luam. Nws daim ntawv thov theem ncaj qha qhia txog kev txhim kho lub zog ntawm lub teb chaws kev lag luam aerospace thiab siab - kev lag luam khoom siv kawg. Nyob rau hauv lub neej yav tom ntej, nrog kev txhim kho txuas ntxiv ntawm kev ua cov thev naus laus zis, kev siv cov titanium alloys hauv thaj chaw aerospace yuav ntau dua thiab nyob rau hauv - qhov tob.
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