1. Lub luag hauj lwm ntawm Titanium nyob rau hauv niaj hnub Airliners
Titanium alloys yog siv dav hauv kev tsim cov dav hlau loj hauv pej xeem - rau kev tsaws iav, lub log thiab qhov tseem ceeb ntawm cov qauv, ntau yam yog forged los ntawm titanium alloy. Ntawm C919 cov neeg caij dav hlau loj (Tuam Tshoj), qhov loj ntawm titanium alloy qhov chaw suav txog li 10% ntawm lub dav hlau tag nrho cov khoom loj, qhov kev siv titanium siab tshaj plaws ntawm Suav - ua pej xeem aircraft. Sib piv cov tsev neeg dav hlau (A380-chav dav-lub cev thiab B787-chav kawm airframes) qhia qhov sib piv, nrog rau ib qho A380 siv kwv yees li 65 tons ntawm titanium.
2. Qhov twg Titanium siv nyob rau hauv lub Airframe
| Zone | Hom Khoom & Daim Ntawv |
|---|---|
| Nos ntu | Ti-6Al-4V ELI forgings |
| Cav pylon | Ti-6Al-4V forgings thiab phaj |
| Tail / sab tis | Ti-6Al-4V forgings thiab phaj |
| Center tis box | Ti-6Al-4V ELI forgings |
| Landing gear system | Ti-6Al-4V forgings |
| Cav cheeb tsam (A380) | Cav pods, tawv, ua ntug, brackets, weldable tis ntsia |
3. Ti-6Al-4V (TC4) - The Workhorse Alloy
Ti-6Al-4V (TC4 per GB/T 3620) is a medium-strength (>900 MPa) alpha + beta titanium alloy tsim nyob rau hauv Teb Chaws Asmeskas xyoo 1954. Nws suav txog kwv yees li 55-65% ntawm ntiaj teb titanium semi-cov khoom tiav, siv rau aerospace forgings thiab phaj vim nws zoo heev tag nrho - puag ncig kev ua tau zoo, nruab nrab nqi thiab ntev kev pab cuam keeb kwm. Nyob rau hauv qhov mob annealed nws kuj tuaj yeem ua kom sov- kho kom muaj zog, txawm tias weldability yog txwv. Cov qauv sib npaug raws li cov qauv sib txawv hauv tebchaws suav nrog Ti-6Al-4V (US), BT6 (Russia), TA6V (Fabkis) thiab TC4 (Tuam Tshoj) - txhua tus tswj hwm los ntawm lawv cov kev qhia hauv lub tebchaws.
4. Tsawg-Tub kub ELI Variants
"ELI" stands rau Ntxiv -Low Interstitial titanium alloys, haum rau qis- siv kub: lub zog nce raws li qhov kub thiab txias txo thaum lub zog yog khaws cia ntau, yog li lawv tau siv rau cov khoom siv cryogenic. Tsawg- kub titanium alloys tuav cov pa oxygen tsawg heev (los ntawm 0.2% mus rau Tsawg dua lossis sib npaug li 0.12%) thiab tuaj yeem siv rau qhov kub thiab txias (qis dua 77 K). Cov alloys yog Ti-5Al-2.5Sn (ELI) thiab Ti-6Al-4V (ELI). Ti-5Al-2.5Sn ELI tau qhia hauv Asmeskas thaum ntxov xyoo 1960 thiab yog tsim nyob rau hauv Suav teb raws li TA7 (GB txuj).
5. Cov ntawv sau
Thaum qhia txog titanium rau airframe thiab lub cav qhov chaw, paub meej tias qib kev xaiv raws li tus qauv siv (ASTM B265 / AMS 4928 / GB / T 3620), txoj kev forging thiab daim ntawv pov thawj zeb, suav nrog cov txiaj ntsig ntawm chemistry thiab mechanical test.
