11
2024
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07
Yuav Ua Li Cas Xaiv Titanium Phaj
Yuav ua li cas xaiv lub titanium phaj
Alloying cov ntsiab lus tuaj yeem muab faib ua peb pawg raws li lawv cov kev cuam tshuam ntawm theem hloov pauv kub:
1.Cov ntsiab lus uas stabilize lub α theem thiab nce qib hloov pauv kub yog α stabilizing cov ntsiab lus, xws li txhuas, carbon, oxygen, thiab nitrogen. Ntawm lawv, txhuas yog cov ntsiab lus tseem ceeb ntawm titanium alloy, uas muaj cov txiaj ntsig pom tseeb ntawm kev txhim kho cov hlau zoo li qub thiab kub-kub lub zog, txo cov kev nqus tshwj xeeb, thiab nce elastic modulus.
2. Lub caij stabilizes β theem thiab txo cov theem hloov pauv kub yog lub β-stabilizing lub caij, uas tuaj yeem muab faib ua ob hom: isomorphic thiab eutectoid. Cov khoom siv titanium alloys suav nrog molybdenum, niobium, thiab vanadium; Cov tom kawg suav nrog chromium, manganese, tooj liab, hlau, thiab silicon.
3. Cov ntsiab lus uas tsis tshua muaj kev cuam tshuam rau theem kev hloov pauv kub yog cov ntsiab lus nruab nrab, xws li Zr, Sn, thiab lwm yam.
Oxygen, nitrogen, carbon thiab hydrogen yog lub ntsiab impurities hauv titanium alloys. Oxygen thiab nitrogen muaj ntau dua solubility nyob rau hauv α theem, uas muaj ib tug tseem ceeb ntxiv dag zog rau cov titanium alloy, tab sis nws txo cov plasticity. Nws feem ntau tau teev tseg tias cov ntsiab lus oxygen thiab nitrogen hauv titanium yuav tsum qis dua 0.15-0.2% thiab 0.04-0.05% feem. Lub solubility ntawm hydrogen nyob rau hauv lub α theem yog tsawg heev, thiab ntau heev hydrogen yaj nyob rau hauv lub titanium alloy yuav tsim hydrides, uas yuav ua rau cov alloy nkig. Feem ntau, cov ntsiab lus hydrogen hauv titanium alloys yog tswj 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.
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