Qib 2 titanium yog qib unalloyed (kev lag luam ntshiab) titanium qib, thiab nws yog dav lees paub rau nws zoo heev ductility thiab superior formability ntawm titanium alloys. Qhov kev sib xyaw ua ke ntawm cov khoom no ua rau nws tsim nyog rau ntau yam kev tsim khoom.
1. Kev ua haujlwm siab
Ductility yog hais txog cov khoom muaj peev xwm deform plastically ua ntej fracturing.
Elongation (A50mm): Feem ntau 20% yam tsawg kawg nkaus thiab feem ntau yog li ntawm 20% mus rau 25% nyob rau hauv cov mob annealed. Qhov no yog qhov siab dua li ntau qhov siab -lub zog titanium alloys (piv txwv li, Qib 5 Ti-6Al-4V feem ntau muaj 10-15% elongation).
Txo hauv Cheeb Tsam (RA): Feem ntau 30% yam tsawg kawg nkaus.
Toughness: Nws qhia tau zoo tsawg-kub toughness, tswj ductility txawm nyob rau hauv cryogenic kub yam tsis muaj ductile- nkig hloov.
2. Formability
Qib 2 titanium yog qhov tsim nyog tshaj plaws ntawm cov khoom lag luam ntshiab titanium qib (Qib 1, 2, 3, 4).
Cold forming: Nws yog qhov yooj yim tsim los ntawm cov txheej txheem ua haujlwm txias xws li sib sib zog nqus kos duab, khoov, stamping, yob txoj kev, thiab spinning. Nws tuaj yeem tsim rau hauv cov duab nyuaj nrog cov txheeb ze yooj yim.
Springback: Zoo li tag nrho cov titanium alloys, nws pom zoo dua springback piv rau hlau los yog txhuas tom qab khoov. Tooling tsim yuav tsum suav rau qhov no.
Ua kom sov: Rau cov geometries nyuaj heev los yog txo cov caij nplooj ntoos hlav rov qab thiab tsim cov loads, sov sib sau ntawm qhov kub ntawm 150℃mus rau 300℃(300℃F txog 570℃F) feem ntau yog ua hauj lwm, uas ntxiv txhim kho nws formability.
Annealing: Cov khoom ua haujlwm- hardens thaum lub caij txias. Intermediate annealing (feem ntau ntawm 700℃mus rau 800 degree) yuav tsum tau rov qab ductility ntawm kev tsim cov haujlwm rau kev ua haujlwm txias.
Cov ntsiab lus
Hauv cov ntsiab lus, Qib 2 titanium muaj cov ductility zoo heev nrog cov txiaj ntsig siab elongation thiab superior formability, tshwj xeeb tshaj yog nyob rau hauv cov mob annealed. Nws yog qhov kev xaiv zoo tshaj plaws rau cov ntawv thov uas xav tau kev hloov pauv ntawm cov txheej txheem txias los yog sov so, xws li cov khoom siv hluav taws xob, cov khoom siv tshuaj, thiab cov khoom siv vaj tsev.
