Dab tsi yog qhov yooj yim titanium alloy rau tshuab
Hauv cov txheej txheem ntau ntawm cov titanium alloys, cov qib sib txawv ntawm cov yam ntxwv sib txawv ntawm cov qauv crystal, alloying kev sib piv, thiab kev kho cua sov. Yog tias kev nyuaj yog tus qauv, cov lag luam ntshiab titanium (CP-TI) sawv cev rau nws cov khoom siv tshwj xeeb thiab cov txheej txheem hloov kho tau.
Cov txheej txheem kev cai los ntawm cov qauv siv lead ua
Kev lag luam ntshiab ntshiab titanium (xws li TA1, TA2, thiab TA3) belongs rau cov -Type titanium alloy. Nws hexagonal kaw-ntim kaw (HCP) Crystal tus qauv muab peb qhov kev ua haujlwm tseem ceeb:
Tsawg Tawm Los Muaj Zog thiab Kev Ua Haujlwm Siab
Cov txiaj ntsig zoo ntawm cov lag luam ntshiab tit lub titanium yog feem ntau yog nyob rau hauv 200-400 mpa ntau, tsuas yog hais txog ib nrab ntawm+ - hom tc4). Qhov muaj zog tsawg no tso cai rau kev tiv thaiv loj kom ua tiav ntawm chav sov, ua tiav elongations ntawm 10% -15% ntawm TC4. Nws cov khaub ncaws muaj zog yooj yim
Zoo heev Thermal ruaj khov
Lub recrystallization kub ntawm kev lag luam ntshiab titanium yog 600-650 degree, thiab nws undergoes zoo tsis muaj kev softening thaum ua hauv qab 300 degree. Cov cuab yeej no excrels xws li kub nyhiab thiab kub ua kom tiav cov hluav taws xob me me (r}
Tsawg ua haujlwm hnyav
Kev ua haujlwm hardening exponent (n tus nqi) ntawm kev lag luam ntshiab titanium tsuas yog 0.1-0.2, qis dua li 0.3-0.4 ntawm tc4. Qhov no txhais tau tias cov khoom tsis tau poob nrawm vim tias ua rau tawv nqaij tawv thaum muaj kev sib txuas lus txuas ntxiv, ua rau nws haum rau cov txheej txheem ntau ntxiv rau cov txheej txheem ntau ntxiv. Nws cov khoom muaj zog ruaj khov pab kom muaj kev twv ua ntej ntau ntawm kev tsim cov rog thiab nthuav dav cov txheej txheem qhov rai.
Kev yoog raws li ntau cov txheej txheem xwm txheej
Kev ua cov txiaj ntsig ntawm kev lag luam ntshiab titanium txuas ntxiv thoob plaws tag nrho cov khoom siv ua saw:
Ntaub
Thaum lub sijhawm tig, tus nqi hnav cov nqi ntawm kev lag luam titanium tsuas yog ib-peb uas ntawm TC4. Nws cov rog tsis tau cia ua rau cov nqi pub noj ntau dua (0.1-0.2 mm / min), txhim kho kev ua tau zoo thaum ua kom zoo (ra hauv qab 0.8 μm). Tsis tas li ntawd, nws cov khoom tawg tawg ua kom tiv thaiv ntev nti entanglement thiab txo qis qis rau kev tu.
Yas Txheej Txheem Txheej Txheem
Nyob rau hauv khoov, muaj ntshiab titanium tuaj yeem ua tiav tsawg kawg yog khoov radius ntawm 0.5 zaug lub phaj tuab (r {t), yam tsis muaj qhov xav tau ntawm preheating. Nws cov yam ntxwv qis tshaj tawm (springback lub cav <0.5 degree) yooj yim pwm thiab pab txhawb kev tswj hwm qhov tseeb ntawm kev tswj hwm qhov tseeb. Hauv kev sib sib zog nqus daim duab, cov khoom tuaj yeem tiv taus cov nqi nyias tshaj li 30% yam tsis muaj kev tawg, ua rau nws tsim tshwj xeeb rau kev tsim cov kab noj hniav sib sib zog nqus.
Koom nrog cov txheej txheem sib raug zoo
Muaj cov khoom pov thawj ntshiab zoo nkauj weldability, nrog Argon arc welded koom ua ke tau lub zog ntau tshaj li 90% ntawm niam txiv cov khoom. Nws qhov tsawg cua sov cov tswv yim rhiab tau nyob rau hauv ho tsawg weld distortion dua tc4 thiab tsawg dua rau kev tsim ntawm thaj chaw weld. Hauv kev sib txawv ntawm cov khoom lag luam ntshiab, cov pob qij txha muaj peev xwm ua ke kub ntawm cov qib qis (600-700 degree), nrog kev ua ke ze ze ntawm cov khoom siv.
Cov Khoom Muag Khoom Muag Khoom Tsim Khoom
Kev ua cov txiaj ntsig ntawm kev lag luam ntshiab ntshiab Titanium qia los ntawm nws "nruab nrab lub zog" tsim tswv yim:
150 txoj kev tswj hwm lub tswv yim
Los ntawm nruj txwv cov ntsiab lus ntawm -Stabilizing ntsiab (xws li V thiab mo), kev siv tsis huv si titanium tswj hwm ib theem ntawm chav tsev kub. Qhov no tsim qauv khaws cia cov tseem ceeb ntawm cov khoom siv titanium ntawm cov alloys (corrosion tsis kam thiab biocompatibility thiab biocompatibility thiab biocompatibility) thaum tsis txhob muaj teeb meem aniototropic tshwm sim los ntawm Multiphase Micrtructures.
Kev Tsim Kho Microstructure
Cov qauv sib luag ntawm cov qauv kev lag luam ntawm kev lag luam ntshiab Titanium cov khoom siv, ua kom pom kev txhim kho kev ntxhov siab hauv qab nyuaj. Los ntawm kev tswj cov kub ua haujlwm kub (xws li forging piv thiab txias tus nqi), ib tug cwj pwm microstructure nrog lub grain loj ntawm 5-8 tuaj yeem ua tiav, ntxiv txhim kho kev ua haujlwm.
Kev Tswj Xyuas Cov Mob Nkaus
Cov yeeb yaj kiab oxide (ti₂) ntawm kev lag luam ntshiab cov khoom pov thawj kev kho tus kheej zoo, ua kom txo cov cuab yeej thaum lub sijhawm machining. Los ntawm kev tswj cov txheej txheem pickling, txheej oxide niaj hnub tuaj yeem tsim ntawm cov khoom saum npoo av, txhim kho corrosion tsis dhau thaum txo kev sib txhuam thaum ua.
Kev ua cov txiaj ntsig ntawm kev lag luam ntshiab titanium yog qhov tseem ceeb ntawm cov khoom ntawm cov khoom sib npaug ntawm cov khoom siv science thiab engineering yuav tsum tau. Thaum tswj hwm cov khoom tseem ceeb ntawm titanium alloys, kev ua nyuaj yog txo rau qib uas los ntawm kev ua kom zoo thiab ua kom haum. Qhov kev tshuav no tau ua rau qhov kev thov cuam tshuam ntawm cov qhab nia xws li TA1 thiab TA2 hauv cov khoom siv tshuaj, ua rau lawv xav tau cov kev thov uas xav tau ntau.
