Titanium Alloying

titanium alloys yog cov alloys tsim los ntawm titanium nrog ntxiv ntawm lwm cov ntsiab lus. Titanium muaj ob hom homogeneous heterocrystals: densely teem hexagonal qauv -titanium qis dua 882 degree, thiab lub cev-centred cubic-titanium saum toj 882 degree.
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 -stabilizing cov ntsiab lus, xws li txhuas, carbon, oxygen thiab nitrogen. Aluminium yog lub ntsiab alloying ntawm titanium alloy, uas muaj qhov pom tseeb los ntawm kev txhim kho lub zog ntawm cov hlau nyob rau hauv chav tsev kub thiab kub, txo qhov tshwj xeeb lub ntiajteb txawj nqus thiab nce lub modulus ntawm elasticity.
Cov ntsiab lus stabilize -phase thiab txo cov theem hloov pauv kub yog cov -stabilizing cov ntsiab lus, uas tuaj yeem muab faib ua homocrystalline thiab eutectic hom. Daim ntawv thov ntawm titanium alloy khoom Cov qub muaj molybdenum, niobium, vanadium, thiab lwm yam .; tom kawg muaj chromium, manganese, tooj liab, hlau, silicon, thiab lwm yam.

③ Cov ntsiab lus uas tsis tshua muaj txiaj ntsig rau theem 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 nyob rau hauv-theem muaj ib tug ntau dua solubility, titanium alloy muaj ib tug tseem ceeb ntxiv zog, tab sis lub plasticity yog txo. Cov ntsiab lus ntawm oxygen thiab nitrogen hauv titanium feem ntau yog 0.15-0.2% thiab 0.04-0.05% raws li. Hydrogen nyob rau hauv-theem solubility yog heev me me, titanium alloys yaj nyob rau hauv ntau tshaj ntawm hydrogen yuav tsim hydride, thiaj li hais tias cov alloy yuav nkig. Feem ntau, cov ntsiab lus hydrogen hauv titanium alloys khaws cia hauv qab 0.015%. Lub dissolution ntawm hydrogen nyob rau hauv titanium yog reversible thiab yuav raug tshem tawm los ntawm lub tshuab nqus tsev annealing.