Kev siv cov titanium phaj titanium cov ntaub ntawv hauv cov neeg caij dav hlau
European Airbus 'A3XX neeg nrog caij dav hlau, American Boeing's B77X dav hlau, COMAC's C919, thiab CR929 aircraft tsim los ntawm Sino-Lavxias teb sab kev koom tes txhua yam siv titanium cov ntaub ntawv loj. qauv.
Txoj kev loj hlob ntawm C919 cov neeg caij dav hlau loj, uas tau tsim los ntawm Tuam Tshoj, tau pib hauv xyoo 2008. Thaum Lub Kaum Ib Hlis 2, 2015, tus qauv tseem ceeb tau tsiv tawm ntawm cov txheej txheem kev tsim kho thiab mus dhau kev xyaum khiav ntawm Shanghai COMAC. Lub dav hlau tseem ceeb tau tshwm sim rau lub Tsib Hlis 5, 2017. Kev sib pauv lub davhlau tseem ceeb tau ua tiav rau lub Kaum Ib Hlis 10, thiab lub dav hlau loj thib ob C919 tau ua tiav nws thawj lub davhlau ntawm Shanghai Pudong tshav dav hlau thaum Lub Kaum Ob Hlis 17, kos npe nkag ntawm cov dav hlau loj hauv tsev mus rau theem tshiab. ntawm kev sim davhlau. Txawm hais tias cov ntaub ntawv siv nyob rau hauv tus qauv yog tag nrho los ntawm txawv teb chaws, lawv tsuas yog siv kom tau txais ntawv pov thawj airworthiness. Pib los ntawm lub tshuab No.
Lub ntsiab technical parameters ntawm C 919 loj aircraft tau qhia nyob rau hauv lub rooj.
Cov ntaub ntawv titanium tau siv dav hauv kev tsim cov dav hlau dav hlau loj. Qee qhov tseem ceeb ntawm cov iav tsaws thiab cov log yog forged los ntawm titanium alloy, thiab qee qhov me me kuj tseem forged los ntawm aluminium alloy. Nyob rau hauv lub dav hlau loj C919, net loj ntawm titanium alloy qhov chaw suav txog li 10% ntawm tag nrho cov net loj ntawm lub dav hlau. Ntawm cov dav hlau pej xeem tsim nyob rau hauv Suav teb, titanium yog siv ntau tshaj plaws. Yam twg yog ua los ntawm titanium: lub qhov ntswg yog ua los ntawm Ti-6Al-4VEVI forgings; Lub ncua kev kawm ntawv yog ua los ntawm Ti-6Al-4V alloy forgings, daim hlau thiab titanium alloy 55531 forgings; tus Tsov tus tw yog ua los ntawm Ti-6Al-4V alloy forgings; lub tis sab nrauv Nws siv Ti-6Al-4V alloy forgings thiab daim hlau; lub tis nruab nrab siv Ti-6Al-4V EL1 alloy forgings; lub tshuab tsaws iav siv Ti-6Al-4V alloy forgings.
Ti-6Al-4V (GR5, GB/T3620) is a medium strength (>900MPa) + alloy. Nws tau ua tiav tiav los ntawm Watertown Arsenal hauv Tebchaws Meskas hauv xyoo 1954 thiab tau siv dav hauv kev lag luam dav hlau. Hauv thaj chaw aerospace, nws cov khoom lag luam ib nrab tiav tiav rau 55%-65% ntawm lub ntiaj teb tag nrho cov khoom tsim titanium. Siv los tsim ntau yam aerospace tsheb forgings thiab daim hlau. Vim nws cov khoom zoo heev, tus nqi nruab nrab, thiab molding thaum ntxov, nws yog cov alloy nrog kev tshawb fawb tshaj plaws, siv sij hawm ntev tshaj plaws, thiab cov ntawv thov dav tshaj plaws. Yog li ntawd, cov hlau no tau tuav lub zog tseem ceeb txij li thaum nws yug los 67 xyoo dhau los. Qib ntawm cov hlau no yog GR5 hauv kuv lub teb chaws, Ti-6Al-4V los ntawm American Titanium Company (Timet), RMI 6Al4V los ntawm American Active Metal Company, IMI318 los ntawm British Titanium Hlau tuam txhab, BT6 hauv Russia , thiab Sumitomo Hlau Tuam Txhab ntawm Nyiv. ST-AI40, Fabkis TA6V, thiab German Krupp LT31. GR5 alloy yog siv nyob rau hauv lub xeev annealed thiab muaj zog los ntawm kev kho cua sov, tab sis nws cov weldability tsis zoo. Lub "ELI" hauv Ti-6Al-4V ELI stands rau Extro-Low Interstitial titanium alloy, uas yog ib qho thiab + titanium alloy haum rau kev siv kub tsawg. Lawv lub zog muaj zog nce nrog txo qhov kub thiab txias. Toughness tsis tshua muaj qhov kub thiab txias thiab tuaj yeem siv los tsim cov khoom siv hluav taws xob tsawg. Cov ntsiab lus ntawm cov pa oxygen ntawm qhov kub thiab txias ntawm cov titanium alloys yog tsawg heev, los ntawm 0.2% mus rau tsawg dua los yog sib npaug rau 0.12% ntawm cov pa oxygen zoo tib yam, thiab tuaj yeem siv rau qhov kub thiab txias (<77K). Typical alloys are Ti-5Al-2.5Sn (ELI) and Ti-6AI-4V (ELI). Ti-5Al-2.5Sn ELI is an American alloy introduced in the early 1960s. China successfully copied it in the late 1970s, under the brand name GR6 (Chinese military standard GJ B495). Ti-5Al-2.5Sn ELI alloy is particularly suitable for liquid fuel storage tanks operating at -255°C. Both titanium alloys are well supplied by China Baoti Group.
A380 cov neeg caij dav hlau loj ntawm European Airbus Company yog lub dav hlau dav hlau loj tshaj plaws hauv ntiaj teb thiab cov dav hlau uas siv cov khoom siv titanium tshaj plaws. Cov net loj ntawm titanium alloy Cheebtsam suav txog kwv yees li 10% ntawm tag nrho cov net loj ntawm tag nrho lub tshuab. Kev siv cov khoom siv titanium ntawm ib lub dav hlau yog kwv yees li 65 tons. . Cov khoom tseem ceeb ua los ntawm titanium alloy yog: cav pod, tawv nqaij, accessories, txuas lub nplhaib tis, pem hauv ntej bulkhead, ncej ntawm puab flaps thiab tis, pob khawm rail raceway, trailing edge, ncej sib dhos, pob khawm Peb stiffeners, cav seem pylons, propulsion Cheebtsam. , ua ntug, pem hauv ntej bracket, ib feem ntawm lub tsaws iav thiab weldable tis ntsia.
