Kev siv cov khoom siv titanium hauv cov neeg caij dav hlau loj
Cov neeg caij dav hlau A3XX ntawm Air Bus ntawm Europe, B77X aircraft ntawm Boeing ntawm Tebchaws Meskas, C919 ntawm COMAC, thiab CR929 aircraft tsim los ntawm Sino-Lavxias teb sab kev sib koom ua lag luam yog tag nrho cov khoom siv titanium. Qauv.
Txoj kev loj hlob ntawm C919 loj neeg nrog caij dav hlau ua tiav nws tus kheej tsim los ntawm Tuam Tshoj pib xyoo 2008. Thaum Lub Kaum Ib Hlis 2, 2015, thawj tus qauv tau dov tawm ntawm cov kab ntau lawm thiab sim ntawm Shanghai Commercial Aircraft Co., Ltd. Thawj lub davhlau nyob rau lub Tsib Hlis 2017 yog tau ua thaum lub Kaum Ib Hlis. Tom qab thawj lub davhlau ya davhlau, thib ob C919 lub dav hlau loj tau ua nws lub dav hlau dav hlau ntawm Shanghai Pudong tshav dav hlau thaum lub Kaum Ob Hlis, ua cim tias lub dav hlau loj hauv tebchaws tau nkag mus rau theem tshiab ntawm kev sim dav hlau dav hlau. Txawm hais tias cov ntaub ntawv siv nyob rau hauv tus qauv yog tag nrho cov khoom txawv teb chaws, lawv tsuas yog rau cov kev xav tau ntawm kev tau txais daim ntawv pov thawj airworthiness. Txij li thaum thib ob lub dav hlau, tus nqi ntawm cov khoom siv hauv tsev tau nce batch los ntawm batch, xyoo dhau los.
Titanium tau siv dav hauv kev tsim cov dav hlau loj hauv pej xeem. Qee qhov tseem ceeb ntawm kev tsaws iav thiab lub log yog forged nrog titanium alloy, thiab qee qhov me me yog forged nrog 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 pej xeem aircraft tsim nyob rau hauv Suav teb, tus nqi ntawm titanium yog qhov loj tshaj plaws. Yam twg yog ua los ntawm titanium: lub qhov ntswg, uas sivTi-6Al-4V ELI titanium forging; rau kev ncua, Ti-6Al-4V alloy forgings, nplooj ntawv thiab titanium alloy 55531 forgings yog siv; Ti-6Al-4V alloy forgings yog siv rau tis tis; Ti-6Al- 4V alloy forgings thiab daim hlau; Ti-6Al-4V ELI titanium forging rau nruab nrab tis; Ti-6Al{10}}V alloy forging rau tsaws iav system.
Ti-6Al-4V (TC4, GB/T3620) is a medium-strength (>900MPa) + - hom alloy, uas yog tsim los ntawm US Watertown (tseem txhais li Watertown) Arsenal nyob rau hauv 1954 thiab yog dav siv nyob rau hauv aviation nyob rau hauv lub aerospace teb, cov zis ntawm cov khoom ua tiav ib nrab suav rau 55%-65% ntawm lub ntiaj teb tag nrho cov khoom tsim titanium, uas yog siv los tsim ntau yam aerospace forgings thiab daim hlau. Vim nws txoj kev ua tau zoo heev, tus nqi nruab nrab thiab kev tsim ntxov, nws yog qhov kev kawm tshaj plaws. Nyob rau hauv-tob, siv rau lub sij hawm ntev tshaj plaws, thiab daim ntawv thov teb yog qhov dav tshaj plaws, yog li cov alloy tau tuav lub zog muaj zog txij li thaum nws yug los 67 xyoo dhau los. Qib ntawm cov hlau no yog TC4 hauv Suav teb, Ti-6Al-4V los ntawm American Titanium Company (Timet), RMI 6Al4V los ntawm American Active Metals Company, IMI318 los ntawm British Titanium Hlau, BT6 los ntawm Russia thiab BT6 los ntawm Sumitomo Hlau los ntawm Nyiv. ST-AI40, TA6V ntawm Fabkis, LT31 ntawm Krupp ntawm lub teb chaws Yelemees. TC4 alloy yog siv rau hauv lub xeev annealed thiab tuaj yeem ua kom muaj zog los ntawm kev kho cua sov, tab sis cov weldability tsis zoo. "ELI" hauv Ti-6Al-4V ELI txhais tau hais tias Extro-Low Interstitial titanium alloys yog thiab + titanium alloys haum rau siv thaum kub qis, lawv lub zog muaj zog nce nrog qhov kub thiab txias, Toughness txo qis heev nrog kub thiab tuaj yeem siv los ua cov khoom siv hluav taws xob tsawg. Cov ntsiab lus ntawm cov pa oxygen ntawm qhov kub thiab txias titanium alloys yog tsawg heev, los ntawm qib zoo tib yam 0.2% oxygen mus rau tsawg dua los yog sib npaug rau 0.12%, 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, which was introduced in the early 1960s and was successfully copied in China in the late 1970s. The grade is TA7 (Chinese military standard GJ B495). Ti-5Al-2.5Sn ELI alloys are particularly suitable for liquid fuel storage tanks operating at -255°C. These two titanium alloys are available in sufficient supply from China Baotai Group.
Lub dav hlau A380 loj neeg nrog caij ntawm European Airbus yog lub dav hlau dav hlau dav hlau hauv ntiaj teb, thiab nws kuj siv cov khoom siv titanium tshaj plaws. Qhov loj ntawm titanium alloy qhov chaw suav txog li 10% ntawm tag nrho cov net loj ntawm tag nrho cov dav hlau, thiab kev noj cov khoom siv titanium rau ib lub dav hlau yog li 65 tons. . Cov khoom ua los ntawm titanium alloy feem ntau yog (saib daim duab 2): lub plhaub, daim tawv nqaij, txuas qhov chaw nres nkoj ntawm lub cav, txuas lub nplhaib tis, pem hauv ntej bulkhead, ncej thiab tis ntawm puab flaps, hinged khiav raceway, 3 stiffeners ntawm ntug trailing, ncej thiab hinges, ib feem ntawm lub cav hanger, propulsion qhov chaw, ua ntug, pem hauv ntej bracket, ib feem ntawm lub tsaws iav, thiab tis (strip) rail yuav welded.
