Raws li tus txha caj qaum ntawm aerospace daim ntawv thov thiab cov khoom ntawm kev xaiv rau kev kho mob tseem ceeb implants,Ti-6Al-4V titanium alloy xa cov kev ua tau zoo tshwj xeeb qhov twg txhua gram suav thiab kev ua haujlwm ib puag ncig xav tau. Txawm li cas los xij, feem ntau cov ntaub ntawv tshem tawm qhov tseeb tseem ceeb: lub peev xwm ntawm cov hlau no sib tw los ntawm nws cov kev sib tw ua haujlwm. Kev kwv yees nws cov nuances yog txoj hauv kev ncaj qha mus rau cov khoom seem, kev siv nyiaj ntau dhau, thiab kev ua haujlwm tsis ua haujlwm.
Nrog peb lub xyoo dhau los ntawm kev tsim thiab kev yuav khoom, kuv yuav qhia koj dhau qhov kev qhia tshwj xeeb rau qhov tseem ceeb hauv kev siv Ti-6Al-4V.
Dab tsi yog titanium alloy Ti-6Al-4V?
Ti-6Al-4V khoom
Cov ntaub ntawv feem ntau sau lub zog tensile kawg ntawm kwv yees li 895 MPa. Nov yog qhov tus lej no tsis qhia:
Kev ua haujlwm qaug zog yog qhov tseem ceeb: Rau cov khoom siv dynamically loaded (xws li, tsaws iav, turbine hniav), qaug zog zog (~ 500-600 MPa, R=-1) feem ntau tshaj qhov kawg tensile zog. Nto tiav ua qhov tseem ceeb ntawm no - ib qho kev ua haujlwm tsis zoo tuaj yeem ua rau lub neej qaug zog ib nrab.
Fracture Toughness: Ti-6Al-4V titanium alloyua kom pom qhov ua tau zoo tshaj plaws ntawm kev tawm tsam kev tawm tsam, ua rau nws tseem ceeb rau cov khoom siv dav hlau tseem ceeb uas qhov kev tiv thaiv kev puas tsuaj tsis yog - sib tham txog kev nyab xeeb.
Qhov "Dwell Fatigue" Xav txog: Aerospace daim ntawv thov yuav tsum suav rau "nyob rau hauv qaug zog," qhov twg lub ncov siab loads txo qis lub neej qaug zog piv rau cyclic loading ib leeg - ib qho tseem ceeb metallurgical yam hauv kev tsim.
Ti-6Al-4V machinability
Ti-6Al-4V titanium alloynthuav tawm cov teeb meem loj machining. Nws cov thermal conductivity tsawg thiab muaj zog galling nyiam tsim cov xwm txheej zoo meej rau cov cuab yeej tsis ua haujlwm.
Tswv yim Rhiav Kev Qhia:
Tooling:Siv cov cuab yeej ntse, zoo -rake geometry. Carbide sawv cev rau lub hauv paus; polycrystalline pob zeb diamond (PCD) ua pov thawj zoo tshaj rau siab - ntim ntau lawm. Tsis txhob tso cai rau rub lub cuab yeej.
Parameters:Siv qhov chaw qis qis, siab pub tus nqi, thiab tswj xyuas cov khoom sib xws. Qhov no counterintuitive mus kom ze tshem tawm cov cua sov nrog lub nti es tsis hloov nws mus rau lub workpiece los yog cov cuab yeej.
Coolant:Ua kom siab -siab, siab- ntim dej nyab lub tshuab. Los ntawm - cov cuab yeej ua kom txias ua qhov tseem ceeb rau kev sib sib zog nqus- qhov drilling thiab tapping, ua haujlwm rau ob qho tib si txias thiab los tiv thaiv- lub hom phiaj kub.
Ti-6Al-4V Nqe ib kg
Nrog cov nqi txij li $80 txog $150+ ib kilogram, nkag siab tus nqi tsav tsheb yog qhov tseem ceeb:
Titanium daim txhuam cev:Cov khoom siv raw yog tsim nrog lub zog- cov txheej txheem Kroll hnyav
Alloying:Kev taw qhia meej thiab kev tswj hwm ntawm aluminium thiab vanadium
Melting:Ntau Lub Nqus Tsev Arc Remelting (VAR) cycles xyuas kom muaj tshuaj lom neeg homogeneity thiab impurity tshem tawm - tus nqi tseem ceeb
Kev tsim:Cov nqi sib txawv heev los ntawm cov khoom lag luam, nrog cov kab puag ncig yooj yim yog cov ntawv pheej yig tshaj plaws thiab nyias daim ntawv, xaim, lossis kev cai extrusions commanding hwm tus nqi.
Tswv yim rau kev tshaj lij:Cov xwm txheej "mill-annealed" feem ntau muab tus nqi ntau tshaj - kev xaiv zoo. Kev kho cua sov ntxiv (piv txwv li, STA) nce nqi tab sis pab kom cov cuab yeej txhim kho tshwj xeeb.
Dab tsi yog qhov txawv ntawm Ti-6Al-4V thiab ntshiab titanium?
| Khoom | Ti-6Al-4V (Qib 5) | Kev lag luam Pure Titanium (Qib 2) | Qhov tseem ceeb rau kev xaiv |
|---|---|---|---|
| Tensile zog | ~ 895 MPa | ~ 345 MPa | Ti-6Al-4V muab 2.6x ntau zog,enabling sib dua, ntau compact Cheebtsam |
| Yield zog | ~ 828 MPa | ~ 275 MPa | Muaj ntau dua tiv thaiv mus tas li deformation nyob rau hauv load |
| Hardness | ~ 36 HRC | ~ 35 HRA (kwv yees . 80 HRB) | Ti-6Al-4V muaj ntau dua hardnes, sncaj qha cuam tshuam rau machinability thiab hnav tsis kam |
| Qhov ntom | 4.43 g / cm³ | 4.51 g / cm³ | Qhov sib txawv tsis txaus ntseeg - lub zog - rau - qhov hnyav piv piv rau qhov tseem ceeb kom zoo dua |
| Cov ntawv thov tseem ceeb | Cov yam ntxwv & dynamic Cheebtsam | Corrosion-cov khoom siv zoo li qub | Xaiv Qib 5 rau lub zog- daim ntawv thov tseem ceeb, Qib 2 rau corrosion kuj thiab formability |
| Machineability | pluag | Ncaj ncees | Qib 2 ua pov thawj tau yooj yim dua thiab pheej yig dua rau tshuab |
| Weldability | Kev Sib Tw (yuav tsum muaj kev tswj hwm nruj) | Zoo heev | Qib 2 sawv cev rau kev xaiv meej rau cov khoom tsim xws li cov khoom siv hluav taws xob thiab cov tso tsheb hlau luam |
Kev xaiv hauv paus:Qhov no sawv cev rau cov kws tshwj xeeb piv rau kev sib piv generalist. Kev lag luam Pure Titanium (piv txwv li, Qib 2) muajsuperior formability, weldability, thiab zoo heev corrosion kujrau cov khoom siv tshuaj ua haujlwm. Ti-6Al-4V xakwv yees li ob npaug ntawm lub zognrog txo ductility thiab ntau dua kev tsim thiab vuam cov nyom. Xaiv CP titanium rau corrosion-cov tank tiv taus; xaiv Ti-6Al-4V rau qhov tseem ceeb aircraft actuators.
Cov lus nug tseem ceeb teb
Puas yog qib 5 titanium zoo ib yam li 6Al 4V?
Yog lawm. "Qib 5" suav nrog ASTM tsim rau Ti-6Al-4V alloy, sawv cev rau feem ntau siv titanium alloy thoob ntiaj teb.
Lub hardness ntawm Ti-6Al-4V titanium alloy yog dab tsi?
Feem ntau ~ 36 HRC nyob rau hauv lub zeb -annealed mob. Kev kho cua sov tuaj yeem ua tiav ~ 40-41 HRC. Nco ntsoov tias nws lub zog siab thiab qis elastic modulus ua rau nws "xav" nyuaj thaum lub tshuab ua haujlwm dua li cov hlau sib npaug.
Xaus
Ti-6Al-4V titanium alloysawv cev rau ib yam khoom ntawm qhov kawg. Nws muab kev sib xyaw ua ke tsis sib xws ntawm lub zog thiab lub teeb pom kev zoo thaum xav tau kev tshaj lij thiab ua tib zoo saib xyuas ntawm txhua theem txheej txheem. Kev vam meej tsis yog nyob ntawm cov ntaub ntawv xov tooj, tab sis yog nkag siab txog kev sib cuam tshuam ntawm metallurgy, txheej txheem tsim khoom, thiab tiag - cov kev pabcuam hauv ntiaj teb.
Cov hlau no yav tom ntej tsis yog nyob rau hauv daim ntawv thov tshiab nkaus xwb tab sis kuj tseem nyob rau hauv cov txheej txheem kev ua haujlwm siab heev - additive manufacturing rau complex geometries thiab sophisticated thermomechanical kev kho mob rau tailored microstructures. Master cov hauv paus ntsiab lus ua ntej, thiab cov ntawv thov qib siab yuav ua raws.
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