Muaj ob hom homogeneous heterocrystals ntawm alloying caij titanium: titanium nrog ib tug kaw-packed hexagonal qauv hauv qab no 882 degree, thiab titanium nrog lub cev-centered cubic qauv saum toj no 882 degree.
Raws li lawv cov nyhuv ntawm cov theem hloov pauv kub
Alloying cov ntsiab lus tuaj yeem muab faib ua peb pawg raws li lawv cov txiaj ntsig ntawm theem hloov pauv kub:
(1) Cov ntsiab lus ruaj khov rau theem thiab nce qib hloov pauv kub yog cov khoom ruaj khov, suav nrog txhuas, carbon, oxygen thiab nitrogen. Ntawm lawv, aluminium yog lub ntsiab alloying ntawm titanium alloy, uas muaj cov txiaj ntsig pom tseeb ntawm kev txhim kho lub zog ntawm cov hlau nyob rau hauv chav tsev kub thiab kub kub, txo qhov tshwj xeeb lub ntiajteb txawj nqus thiab nce elastic modulus.
(2) Cov ntsiab lus ruaj khov rau theem thiab txo cov theem hloov pauv kub yog cov khoom ruaj khov, uas tuaj yeem muab faib ua ob hom: isomorphic thiab eutectic hom. Cov qub muaj molybdenum, niobium, vanadium, thiab lwm yam, thiab tom kawg muaj chromium, manganese, tooj liab, hlau, silicon, thiab lwm yam.
(3) Cov ntsiab lus uas tsis tshua muaj kev cuam tshuam rau theem kev hloov pauv kub yog cov khoom nruab nrab, xws li zirconium thiab tin.
Oxygen, nitrogen, carbon, thiab hydrogen yog lub ntsiab impurities hauv titanium alloys. Oxygen thiab nitrogen muaj cov solubility loj nyob rau theem, uas muaj qhov tseem ceeb ntxiv dag zog rau cov titanium alloys, tab sis txo cov plasticity. Feem ntau, cov ntsiab lus ntawm cov pa oxygen thiab nitrogen hauv titanium tau teev tseg kom qis dua {{0}}.15 ~ 0.2% thiab 0.04 ~ 0.05 % raws. Hydrogen muaj me ntsis solubility nyob rau hauv theem, thiab dissolving ntau hydrogen nyob rau hauv titanium alloys yuav tsim hydrides, uas ua rau cov alloy nkig. Feem ntau, cov ntsiab lus hydrogen hauv titanium alloys yog tswj hauv qab 0.015%. Lub dissolution ntawm hydrogen hauv titanium yog thim rov qab thiab tuaj yeem raug tshem tawm nrog lub tshuab nqus tsev annealing.
Raws li qhov muaj pes tsawg leeg ntawm theem
Titanium alloys tuaj yeem muab faib ua peb pawg raws li qhov muaj pes tsawg leeg ntawm theem: alloys, (+) alloys thiab alloys, uas yog sawv cev los ntawm TA, TC thiab TB hauv Suav teb.
(1) Cov hlau muaj qee yam ntawm cov ntsiab lus nrog cov theem ruaj khov, thiab feem ntau yog tsim los ntawm cov theem hauv lub xeev sib npaug. alloy muaj ib tug me me lub ntiajteb txawj nqus, zoo thermal zog, zoo weldability thiab zoo heev corrosion kuj, thiab qhov tsis zoo yog tias nws tsis tshua muaj zog ntawm chav tsev kub, thiab feem ntau yog siv los ua cov khoom siv cua sov thiab cov khoom siv corrosion-resistant. alloys feem ntau muab faib ua all- alloys (TA7), ze- alloys (Ti-8Al-1Mo-1}V), thiab alloys nrog me me compounds (Ti-2. 5 Cu).
(2) ( + ) Cov hlau muaj qee qhov nyiaj ntawm cov theem ruaj khov thiab theem, thiab cov qauv ntawm cov hlau nyob hauv lub xeev sib npaug yog theem thiab theem. (+) alloy muaj lub zog nruab nrab thiab tuaj yeem ua kom muaj zog los ntawm kev kho cua sov, tab sis kev ua haujlwm vuam tsis zoo. ( + ) alloys tau siv dav, ntawm cov khoom tsim tawm ntawm Ti-6Al-4V alloy tso nyiaj rau ntau tshaj li ib nrab ntawm tag nrho cov ntaub ntawv titanium.
(3) Cov hlau muaj ntau cov ntsiab lus uas ruaj khov rau theem, uas tuaj yeem khaws tag nrho cov theem siab kub mus rau chav tsev kub. Cov alloys feem ntau muab faib ua cov khoom siv hluav taws xob kho tau zoo (sub-stable alloys thiab ze-sub-stable alloys) thiab cov khoom siv hluav taws xob ruaj khov. Thaum tshav kub kub-kho tau alloy muaj cov yas zoo heev nyob rau hauv lub xeev quenched, thiab tuaj yeem ua rau lub zog tensile ncav cuag 130 ~ 140kgf / mm2 los ntawm kev kho kev laus. alloys feem ntau yog siv los ua cov ntaub ntawv muaj zog thiab siab tawv. Qhov tsis zoo yog feem ntau, tus nqi siab, kev ua haujlwm tsis zoo, thiab kev ua haujlwm nyuaj.