Sab saum toj kaum Properties ntawm Titanium

(1) Tsawg ceev, siab zog, tshwj xeeb lub zog

Titanium ceev yog 4.51g / cm3, 57% hlau, titanium tsawg dua ob zaug hnyav dua li txhuas, peb zaug muaj zog dua txhuas. Titanium alloy tshwj xeeb lub zog (lub zog / ntom piv) feem ntau yog siv rau hauv kev lag luam alloys loj (saib Table 2-1), titanium alloy tshwj xeeb lub zog yog 3.5 npaug stainless hlau; aluminium alloy 1.3 zaug; magnesium alloy 1.7 npaug, yog li nws yog qhov kev lag luam aerospace yog qhov tseem ceeb rau cov qauv ntawm cov khoom siv.
(2) Zoo heev corrosion kuj

Lub passivity ntawm titanium nyob ntawm lub xub ntiag ntawm oxide zaj duab xis, thiab nws cov corrosion kuj nyob rau hauv oxidizing nruab nrab yog zoo dua li nyob rau hauv txo qhov nruab nrab. Tus nqi siab corrosion tshwm sim hauv kev txo cov xov xwm. Titanium tsis corrode nyob rau hauv ib co corrosive media, xws li seawater, ntub chlorine gas, chlorite thiab hypochlorite daws, nitric acid, chromic acid, hlau chlorides, sulfides, thiab organic acids. Txawm li cas los xij, hauv xov xwm uas cuam tshuam nrog titanium los tsim hydrogen (xws li hydrochloric thiab sulfuric acids), titanium feem ntau muaj tus nqi loj corrosion. Txawm li cas los xij, yog tias ib qho me me ntawm oxidizing tus neeg sawv cev ntxiv rau cov kua qaub, ib zaj duab xis passivation yuav tsim rau saum npoo ntawm titanium. Yog li ntawd, titanium yog corrosion-resistant nyob rau hauv muaj zog sulfuric acid-nitric acid los yog hydrochloric acid-nitric acid sib tov, thiab txawm nyob rau hauv hydrochloric acid muaj dawb chlorine. Kev tiv thaiv oxide zaj duab xis ntawm titanium yog feem ntau tsim thaum cov hlau ntsib dej, txawm nyob rau hauv me me dej los yog dej vapor. Yog tias titanium raug rau ib puag ncig oxidizing muaj zog hauv qhov tsis muaj dej tiav, oxidation sai tshwm sim thiab kev tawm tsam hnyav thiab txawm tias tshwm sim tshwm sim feem ntau tshwm sim. Cov xwm txheej zoo li no tau tshwm sim thaum titanium reacts nrog fuming nitric acid uas muaj ntau tshaj nitrogen oxide, thiab thaum titanium reacts nrog qhuav chlorine gas. Yog li ntawd, ib tug npaum li cas ntawm cov dej yog tsim nyog los tiv thaiv xws li tshwm sim.

(3) Ua haujlwm kub zoo

Feem ntau aluminium ntawm 150 degree, stainless hlau ntawm 310 degree uas yog qhov poob ntawm qhov kev ua tau zoo qub, thiab titanium alloys ntawm 500 degree lossis yog li tseem tuav cov khoom zoo. Thaum lub dav hlau ceev nce mus txog 2.7 npaug ntawm qhov ceev ntawm lub suab, qhov kub ntawm lub dav hlau qauv nce mus txog 230 degree, aluminium alloys thiab magnesium alloys tsis tuaj yeem siv, thaum titanium alloys tuaj yeem ua tau raws li qhov yuav tsum tau ua. Titanium lub tshav kub tsis kam yog zoo, nws yog siv rau aero-engine compressor disk thiab hniav thiab daim tawv nqaij ntawm lub rear fuselage ntawm lub aircraft.
(4) Kev ua haujlwm kub tsis zoo

Qee cov titanium alloys (xws li Ti - 5AI - 2.5SnELI) lub zog nrog kev txo qhov kub thiab nce, tab sis lub plasticity ntawm qhov txo qis tsis ntau, ntawm qhov kub thiab txias tseem muaj qhov zoo ductility thiab toughness, haum rau siv nyob rau hauv ultra-tsawg kub. Yuav siv tau rau hauv cov kua hydrogen qhuav thiab kua oxygen foob pob ua ntxaij cav, los yog nyob rau hauv manned spacecraft rau ultra-tsawg kub ntim thiab cia thawv.

(5) non-magnetic

Titanium yog non-magnetic, nws yog siv nyob rau hauv submarine plhaub, yuav tsis ua rau tawg ntawm mines.

(6) Me thermal conductivity
Titanium lub thermal conductivity yog me me, tsuas yog 1/5 ntawm cov hlau, txhuas 1/13, tooj liab 1/25. Cov thermal conductivity tsis zoo yog qhov tsis zoo ntawm titanium, tab sis qee zaum koj tuaj yeem siv cov yam ntxwv ntawm titanium.
(7) Tsawg modulus ntawm elasticity
Lub modulus ntawm elasticity ntawm titanium tsuas yog 55% ntawm cov hlau, yog li thaum siv los ua cov khoom siv, cov qauv qis ntawm elasticity yog qhov tsis zoo.

(8) Lub zog tensile thiab lub zog tawm los yog nyob ze rau ib leeg.

Ti-6AI-4V titanium alloy tensile zog ntawm 960MPa, yield zog ntawm 892MPa, qhov sib txawv ntawm ob tsuas yog 58MPa.
(9) Titanium yog yooj yim oxidized ntawm qhov kub thiab txias.

Titanium thiab hydrogen-oxygen bonding quab yuam muaj zog, peb yuav tsum xyuam xim tiv thaiv oxidation thiab hydrogen absorption. Titanium welding yuav tsum tau ua raws li kev tiv thaiv argon tiv thaiv kev sib kis. Titanium raj thiab ntawv yuav tsum tau kho cua sov nyob rau hauv lub tshuab nqus tsev, titanium forgings tshav kub kev kho mob los tswj lub micro-oxidizing cua.

(10) Tsawg damping kuj

Titanium thiab lwm yam khoom siv hlau (tooj liab, hlau) ua los ntawm tib lub cev thiab qhov loj ntawm lub moos, nrog tib lub zog rau txhua lub moos yuav pom tias lub moos ua los ntawm titanium oscillates mus txog lub suab ntawm lub sijhawm ntev, uas yog, los ntawm Kev tawm tsam lub zog muab rau lub moos tsis yooj yim ploj, yog li peb hais tias titanium qhov kev ua haujlwm tsis zoo yog qhov tsawg.